diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3cf861a8..ddfacadf 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,10 @@
 # Changelog
 
+## 4.0.0-alpha.1
+
+- Scaffolding for v4
+- SASS for CSS sources
+
 ## 3.3.3
 
 - Deprecate CoffeeScript in favour of ES6+ with Babel
diff --git a/dist/css/bootstrap-switch.css b/dist/css/bootstrap-switch.css
new file mode 100644
index 00000000..48b27e66
--- /dev/null
+++ b/dist/css/bootstrap-switch.css
@@ -0,0 +1,293 @@
+/**
+  * bootstrap-switch - Turn checkboxes and radio buttons into toggle switches.
+  *
+  * @version v4.0.0-alpha.1
+  * @homepage http://www.bootstrap-switch.org
+  * @author Mattia Larentis <mattia@larentis.eu> (http://larentis.eu)
+  * @license Apache-2.0
+  */
+
+.bootstrap-switch {
+  display: inline-block;
+  direction: ltr;
+  cursor: pointer;
+  border-radius: 0.25rem;
+  border: 1px solid;
+  border-color: rgba(0, 0, 0, 0.1) rgba(0, 0, 0, 0.1) rgba(0, 0, 0, 0.25);
+  position: relative;
+  text-align: left;
+  overflow: hidden;
+  line-height: 8px;
+  z-index: 0;
+  user-select: none;
+  vertical-align: middle;
+  transition: border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out; }
+  .bootstrap-switch .bootstrap-switch-container {
+    display: inline-block;
+    top: 0;
+    border-radius: 0.25rem;
+    transform: translate3d(0, 0, 0); }
+  .bootstrap-switch .bootstrap-switch-handle-on,
+  .bootstrap-switch .bootstrap-switch-handle-off,
+  .bootstrap-switch .bootstrap-switch-label {
+    box-sizing: border-box;
+    cursor: pointer;
+    display: inline-block !important;
+    height: 100%;
+    line-height: 1.25;
+    padding: 0.5rem 1rem;
+    font-size: 1rem;
+    border-radius: 0; }
+  .bootstrap-switch .bootstrap-switch-handle-on,
+  .bootstrap-switch .bootstrap-switch-handle-off {
+    text-align: center;
+    z-index: 1; }
+    .bootstrap-switch .bootstrap-switch-handle-on.bootstrap-switch-primary,
+    .bootstrap-switch .bootstrap-switch-handle-off.bootstrap-switch-primary {
+      color: #fff;
+      background-color: #0275d8;
+      border-color: #0275d8; }
+      .bootstrap-switch .bootstrap-switch-handle-on.bootstrap-switch-primary:hover,
+      .bootstrap-switch .bootstrap-switch-handle-off.bootstrap-switch-primary:hover {
+        color: #fff;
+        background-color: #025aa5;
+        border-color: #01549b; }
+      .bootstrap-switch .bootstrap-switch-handle-on.bootstrap-switch-primary:focus, .bootstrap-switch .bootstrap-switch-handle-on.bootstrap-switch-primary.focus,
+      .bootstrap-switch .bootstrap-switch-handle-off.bootstrap-switch-primary:focus,
+      .bootstrap-switch .bootstrap-switch-handle-off.bootstrap-switch-primary.focus {
+        box-shadow: 0 0 0 2px rgba(2, 117, 216, 0.5); }
+      .bootstrap-switch .bootstrap-switch-handle-on.bootstrap-switch-primary.disabled, .bootstrap-switch .bootstrap-switch-handle-on.bootstrap-switch-primary:disabled,
+      .bootstrap-switch .bootstrap-switch-handle-off.bootstrap-switch-primary.disabled,
+      .bootstrap-switch .bootstrap-switch-handle-off.bootstrap-switch-primary:disabled {
+        background-color: #0275d8;
+        border-color: #0275d8; }
+      .bootstrap-switch .bootstrap-switch-handle-on.bootstrap-switch-primary:active, .bootstrap-switch .bootstrap-switch-handle-on.bootstrap-switch-primary.active,
+      .show > .bootstrap-switch .bootstrap-switch-handle-on.bootstrap-switch-primary.dropdown-toggle,
+      .bootstrap-switch .bootstrap-switch-handle-off.bootstrap-switch-primary:active,
+      .bootstrap-switch .bootstrap-switch-handle-off.bootstrap-switch-primary.active,
+      .show >
+      .bootstrap-switch .bootstrap-switch-handle-off.bootstrap-switch-primary.dropdown-toggle {
+        color: #fff;
+        background-color: #025aa5;
+        background-image: none;
+        border-color: #01549b; }
+    .bootstrap-switch .bootstrap-switch-handle-on.bootstrap-switch-secondary,
+    .bootstrap-switch .bootstrap-switch-handle-off.bootstrap-switch-secondary {
+      color: #292b2c;
+      background-color: #fff;
+      border-color: #ccc; }
+      .bootstrap-switch .bootstrap-switch-handle-on.bootstrap-switch-secondary:hover,
+      .bootstrap-switch .bootstrap-switch-handle-off.bootstrap-switch-secondary:hover {
+        color: #292b2c;
+        background-color: #e6e6e6;
+        border-color: #adadad; }
+      .bootstrap-switch .bootstrap-switch-handle-on.bootstrap-switch-secondary:focus, .bootstrap-switch .bootstrap-switch-handle-on.bootstrap-switch-secondary.focus,
+      .bootstrap-switch .bootstrap-switch-handle-off.bootstrap-switch-secondary:focus,
+      .bootstrap-switch .bootstrap-switch-handle-off.bootstrap-switch-secondary.focus {
+        box-shadow: 0 0 0 2px rgba(204, 204, 204, 0.5); }
+      .bootstrap-switch .bootstrap-switch-handle-on.bootstrap-switch-secondary.disabled, .bootstrap-switch .bootstrap-switch-handle-on.bootstrap-switch-secondary:disabled,
+      .bootstrap-switch .bootstrap-switch-handle-off.bootstrap-switch-secondary.disabled,
+      .bootstrap-switch .bootstrap-switch-handle-off.bootstrap-switch-secondary:disabled {
+        background-color: #fff;
+        border-color: #ccc; }
+      .bootstrap-switch .bootstrap-switch-handle-on.bootstrap-switch-secondary:active, .bootstrap-switch .bootstrap-switch-handle-on.bootstrap-switch-secondary.active,
+      .show > .bootstrap-switch .bootstrap-switch-handle-on.bootstrap-switch-secondary.dropdown-toggle,
+      .bootstrap-switch .bootstrap-switch-handle-off.bootstrap-switch-secondary:active,
+      .bootstrap-switch .bootstrap-switch-handle-off.bootstrap-switch-secondary.active,
+      .show >
+      .bootstrap-switch .bootstrap-switch-handle-off.bootstrap-switch-secondary.dropdown-toggle {
+        color: #292b2c;
+        background-color: #e6e6e6;
+        background-image: none;
+        border-color: #adadad; }
+    .bootstrap-switch .bootstrap-switch-handle-on.bootstrap-switch-info,
+    .bootstrap-switch .bootstrap-switch-handle-off.bootstrap-switch-info {
+      color: #fff;
+      background-color: #5bc0de;
+      border-color: #5bc0de; }
+      .bootstrap-switch .bootstrap-switch-handle-on.bootstrap-switch-info:hover,
+      .bootstrap-switch .bootstrap-switch-handle-off.bootstrap-switch-info:hover {
+        color: #fff;
+        background-color: #31b0d5;
+        border-color: #2aabd2; }
+      .bootstrap-switch .bootstrap-switch-handle-on.bootstrap-switch-info:focus, .bootstrap-switch .bootstrap-switch-handle-on.bootstrap-switch-info.focus,
+      .bootstrap-switch .bootstrap-switch-handle-off.bootstrap-switch-info:focus,
+      .bootstrap-switch .bootstrap-switch-handle-off.bootstrap-switch-info.focus {
+        box-shadow: 0 0 0 2px rgba(91, 192, 222, 0.5); }
+      .bootstrap-switch .bootstrap-switch-handle-on.bootstrap-switch-info.disabled, .bootstrap-switch .bootstrap-switch-handle-on.bootstrap-switch-info:disabled,
+      .bootstrap-switch .bootstrap-switch-handle-off.bootstrap-switch-info.disabled,
+      .bootstrap-switch .bootstrap-switch-handle-off.bootstrap-switch-info:disabled {
+        background-color: #5bc0de;
+        border-color: #5bc0de; }
+      .bootstrap-switch .bootstrap-switch-handle-on.bootstrap-switch-info:active, .bootstrap-switch .bootstrap-switch-handle-on.bootstrap-switch-info.active,
+      .show > .bootstrap-switch .bootstrap-switch-handle-on.bootstrap-switch-info.dropdown-toggle,
+      .bootstrap-switch .bootstrap-switch-handle-off.bootstrap-switch-info:active,
+      .bootstrap-switch .bootstrap-switch-handle-off.bootstrap-switch-info.active,
+      .show >
+      .bootstrap-switch .bootstrap-switch-handle-off.bootstrap-switch-info.dropdown-toggle {
+        color: #fff;
+        background-color: #31b0d5;
+        background-image: none;
+        border-color: #2aabd2; }
+    .bootstrap-switch .bootstrap-switch-handle-on.bootstrap-switch-success,
+    .bootstrap-switch .bootstrap-switch-handle-off.bootstrap-switch-success {
+      color: #fff;
+      background-color: #5cb85c;
+      border-color: #5cb85c; }
+      .bootstrap-switch .bootstrap-switch-handle-on.bootstrap-switch-success:hover,
+      .bootstrap-switch .bootstrap-switch-handle-off.bootstrap-switch-success:hover {
+        color: #fff;
+        background-color: #449d44;
+        border-color: #419641; }
+      .bootstrap-switch .bootstrap-switch-handle-on.bootstrap-switch-success:focus, .bootstrap-switch .bootstrap-switch-handle-on.bootstrap-switch-success.focus,
+      .bootstrap-switch .bootstrap-switch-handle-off.bootstrap-switch-success:focus,
+      .bootstrap-switch .bootstrap-switch-handle-off.bootstrap-switch-success.focus {
+        box-shadow: 0 0 0 2px rgba(92, 184, 92, 0.5); }
+      .bootstrap-switch .bootstrap-switch-handle-on.bootstrap-switch-success.disabled, .bootstrap-switch .bootstrap-switch-handle-on.bootstrap-switch-success:disabled,
+      .bootstrap-switch .bootstrap-switch-handle-off.bootstrap-switch-success.disabled,
+      .bootstrap-switch .bootstrap-switch-handle-off.bootstrap-switch-success:disabled {
+        background-color: #5cb85c;
+        border-color: #5cb85c; }
+      .bootstrap-switch .bootstrap-switch-handle-on.bootstrap-switch-success:active, .bootstrap-switch .bootstrap-switch-handle-on.bootstrap-switch-success.active,
+      .show > .bootstrap-switch .bootstrap-switch-handle-on.bootstrap-switch-success.dropdown-toggle,
+      .bootstrap-switch .bootstrap-switch-handle-off.bootstrap-switch-success:active,
+      .bootstrap-switch .bootstrap-switch-handle-off.bootstrap-switch-success.active,
+      .show >
+      .bootstrap-switch .bootstrap-switch-handle-off.bootstrap-switch-success.dropdown-toggle {
+        color: #fff;
+        background-color: #449d44;
+        background-image: none;
+        border-color: #419641; }
+    .bootstrap-switch .bootstrap-switch-handle-on.bootstrap-switch-warning,
+    .bootstrap-switch .bootstrap-switch-handle-off.bootstrap-switch-warning {
+      color: #fff;
+      background-color: #f0ad4e;
+      border-color: #f0ad4e; }
+      .bootstrap-switch .bootstrap-switch-handle-on.bootstrap-switch-warning:hover,
+      .bootstrap-switch .bootstrap-switch-handle-off.bootstrap-switch-warning:hover {
+        color: #fff;
+        background-color: #ec971f;
+        border-color: #eb9316; }
+      .bootstrap-switch .bootstrap-switch-handle-on.bootstrap-switch-warning:focus, .bootstrap-switch .bootstrap-switch-handle-on.bootstrap-switch-warning.focus,
+      .bootstrap-switch .bootstrap-switch-handle-off.bootstrap-switch-warning:focus,
+      .bootstrap-switch .bootstrap-switch-handle-off.bootstrap-switch-warning.focus {
+        box-shadow: 0 0 0 2px rgba(240, 173, 78, 0.5); }
+      .bootstrap-switch .bootstrap-switch-handle-on.bootstrap-switch-warning.disabled, .bootstrap-switch .bootstrap-switch-handle-on.bootstrap-switch-warning:disabled,
+      .bootstrap-switch .bootstrap-switch-handle-off.bootstrap-switch-warning.disabled,
+      .bootstrap-switch .bootstrap-switch-handle-off.bootstrap-switch-warning:disabled {
+        background-color: #f0ad4e;
+        border-color: #f0ad4e; }
+      .bootstrap-switch .bootstrap-switch-handle-on.bootstrap-switch-warning:active, .bootstrap-switch .bootstrap-switch-handle-on.bootstrap-switch-warning.active,
+      .show > .bootstrap-switch .bootstrap-switch-handle-on.bootstrap-switch-warning.dropdown-toggle,
+      .bootstrap-switch .bootstrap-switch-handle-off.bootstrap-switch-warning:active,
+      .bootstrap-switch .bootstrap-switch-handle-off.bootstrap-switch-warning.active,
+      .show >
+      .bootstrap-switch .bootstrap-switch-handle-off.bootstrap-switch-warning.dropdown-toggle {
+        color: #fff;
+        background-color: #ec971f;
+        background-image: none;
+        border-color: #eb9316; }
+    .bootstrap-switch .bootstrap-switch-handle-on.bootstrap-switch-danger,
+    .bootstrap-switch .bootstrap-switch-handle-off.bootstrap-switch-danger {
+      color: #fff;
+      background-color: #d9534f;
+      border-color: #d9534f; }
+      .bootstrap-switch .bootstrap-switch-handle-on.bootstrap-switch-danger:hover,
+      .bootstrap-switch .bootstrap-switch-handle-off.bootstrap-switch-danger:hover {
+        color: #fff;
+        background-color: #c9302c;
+        border-color: #c12e2a; }
+      .bootstrap-switch .bootstrap-switch-handle-on.bootstrap-switch-danger:focus, .bootstrap-switch .bootstrap-switch-handle-on.bootstrap-switch-danger.focus,
+      .bootstrap-switch .bootstrap-switch-handle-off.bootstrap-switch-danger:focus,
+      .bootstrap-switch .bootstrap-switch-handle-off.bootstrap-switch-danger.focus {
+        box-shadow: 0 0 0 2px rgba(217, 83, 79, 0.5); }
+      .bootstrap-switch .bootstrap-switch-handle-on.bootstrap-switch-danger.disabled, .bootstrap-switch .bootstrap-switch-handle-on.bootstrap-switch-danger:disabled,
+      .bootstrap-switch .bootstrap-switch-handle-off.bootstrap-switch-danger.disabled,
+      .bootstrap-switch .bootstrap-switch-handle-off.bootstrap-switch-danger:disabled {
+        background-color: #d9534f;
+        border-color: #d9534f; }
+      .bootstrap-switch .bootstrap-switch-handle-on.bootstrap-switch-danger:active, .bootstrap-switch .bootstrap-switch-handle-on.bootstrap-switch-danger.active,
+      .show > .bootstrap-switch .bootstrap-switch-handle-on.bootstrap-switch-danger.dropdown-toggle,
+      .bootstrap-switch .bootstrap-switch-handle-off.bootstrap-switch-danger:active,
+      .bootstrap-switch .bootstrap-switch-handle-off.bootstrap-switch-danger.active,
+      .show >
+      .bootstrap-switch .bootstrap-switch-handle-off.bootstrap-switch-danger.dropdown-toggle {
+        color: #fff;
+        background-color: #c9302c;
+        background-image: none;
+        border-color: #c12e2a; }
+  .bootstrap-switch .bootstrap-switch-label {
+    text-align: center;
+    margin-top: -1px;
+    margin-bottom: -1px;
+    z-index: 100;
+    border-left: 1px solid transparent;
+    border-right: 1px solid transparent; }
+  .bootstrap-switch .bootstrap-switch-handle-on {
+    border-bottom-left-radius: 0.25rem;
+    border-top-left-radius: 0.25rem; }
+  .bootstrap-switch .bootstrap-switch-handle-off {
+    border-bottom-right-radius: 0.25rem;
+    border-top-right-radius: 0.25rem; }
+  .bootstrap-switch input[type='radio'],
+  .bootstrap-switch input[type='checkbox'] {
+    position: absolute !important;
+    top: 0;
+    left: 0;
+    opacity: 0;
+    z-index: -1; }
+  .bootstrap-switch.bootstrap-switch-mini {
+    min-width: 71px; }
+    .bootstrap-switch.bootstrap-switch-mini .bootstrap-switch-handle-on,
+    .bootstrap-switch.bootstrap-switch-mini .bootstrap-switch-handle-off,
+    .bootstrap-switch.bootstrap-switch-mini .bootstrap-switch-label {
+      padding: 0.25rem 0.5rem;
+      font-size: 0.875rem;
+      border-radius: 0.2rem; }
+  .bootstrap-switch.bootstrap-switch-small {
+    min-width: 79px; }
+    .bootstrap-switch.bootstrap-switch-small .bootstrap-switch-handle-on,
+    .bootstrap-switch.bootstrap-switch-small .bootstrap-switch-handle-off,
+    .bootstrap-switch.bootstrap-switch-small .bootstrap-switch-label {
+      padding: 0.25rem 0.5rem;
+      font-size: 0.875rem;
+      border-radius: 0.2rem; }
+  .bootstrap-switch.bootstrap-switch-large {
+    min-width: 120px; }
+    .bootstrap-switch.bootstrap-switch-large .bootstrap-switch-handle-on,
+    .bootstrap-switch.bootstrap-switch-large .bootstrap-switch-handle-off,
+    .bootstrap-switch.bootstrap-switch-large .bootstrap-switch-label {
+      padding: 0.75rem 1.5rem;
+      font-size: 1.25rem;
+      border-radius: 0.3rem; }
+  .bootstrap-switch.bootstrap-switch-disabled, .bootstrap-switch.bootstrap-switch-readonly, .bootstrap-switch.bootstrap-switch-indeterminate {
+    cursor: default !important; }
+    .bootstrap-switch.bootstrap-switch-disabled .bootstrap-switch-handle-on,
+    .bootstrap-switch.bootstrap-switch-disabled .bootstrap-switch-handle-off,
+    .bootstrap-switch.bootstrap-switch-disabled .bootstrap-switch-label, .bootstrap-switch.bootstrap-switch-readonly .bootstrap-switch-handle-on,
+    .bootstrap-switch.bootstrap-switch-readonly .bootstrap-switch-handle-off,
+    .bootstrap-switch.bootstrap-switch-readonly .bootstrap-switch-label, .bootstrap-switch.bootstrap-switch-indeterminate .bootstrap-switch-handle-on,
+    .bootstrap-switch.bootstrap-switch-indeterminate .bootstrap-switch-handle-off,
+    .bootstrap-switch.bootstrap-switch-indeterminate .bootstrap-switch-label {
+      opacity: .5;
+      cursor: default !important; }
+  .bootstrap-switch.bootstrap-switch-animate .bootstrap-switch-container {
+    transition: margin-left 0.5s; }
+  .bootstrap-switch.bootstrap-switch-inverse .bootstrap-switch-handle-on {
+    border-bottom-left-radius: 0;
+    border-top-left-radius: 0;
+    border-bottom-right-radius: 0.25rem;
+    border-top-right-radius: 0.25rem; }
+  .bootstrap-switch.bootstrap-switch-inverse .bootstrap-switch-handle-off {
+    border-bottom-right-radius: 0;
+    border-top-right-radius: 0;
+    border-bottom-left-radius: 0.25rem;
+    border-top-left-radius: 0.25rem; }
+  .bootstrap-switch.bootstrap-switch-focused {
+    box-shadow: 0 0 0 2px rgba(2, 117, 216, 0.5); }
+  .bootstrap-switch.bootstrap-switch-on .bootstrap-switch-label, .bootstrap-switch.bootstrap-switch-inverse.bootstrap-switch-off .bootstrap-switch-label {
+    border-bottom-right-radius: 0.25rem;
+    border-top-right-radius: 0.25rem; }
+  .bootstrap-switch.bootstrap-switch-off .bootstrap-switch-label, .bootstrap-switch.bootstrap-switch-inverse.bootstrap-switch-on .bootstrap-switch-label {
+    border-bottom-left-radius: 0.25rem;
+    border-top-left-radius: 0.25rem; }
diff --git a/dist/css/bootstrap-switch.min.css b/dist/css/bootstrap-switch.min.css
new file mode 100644
index 00000000..052b6ae6
--- /dev/null
+++ b/dist/css/bootstrap-switch.min.css
@@ -0,0 +1,10 @@
+/**
+  * bootstrap-switch - Turn checkboxes and radio buttons into toggle switches.
+  *
+  * @version v4.0.0-alpha.1
+  * @homepage http://www.bootstrap-switch.org
+  * @author Mattia Larentis <mattia@larentis.eu> (http://larentis.eu)
+  * @license Apache-2.0
+  */
+
+.bootstrap-switch{display:inline-block;direction:ltr;cursor:pointer;border-radius:.25rem;border:1px solid;border-color:rgba(0,0,0,0.1) rgba(0,0,0,0.1) rgba(0,0,0,0.25);position:relative;text-align:left;overflow:hidden;line-height:8px;z-index:0;user-select:none;vertical-align:middle;transition:border-color 0.15s ease-in-out,box-shadow 0.15s ease-in-out}.bootstrap-switch .bootstrap-switch-container{display:inline-block;top:0;border-radius:.25rem;transform:translate3d(0, 0, 0)}.bootstrap-switch .bootstrap-switch-handle-on,.bootstrap-switch .bootstrap-switch-handle-off,.bootstrap-switch .bootstrap-switch-label{box-sizing:border-box;cursor:pointer;display:inline-block !important;height:100%;line-height:1.25;padding:.5rem 1rem;font-size:1rem;border-radius:0}.bootstrap-switch .bootstrap-switch-handle-on,.bootstrap-switch .bootstrap-switch-handle-off{text-align:center;z-index:1}.bootstrap-switch .bootstrap-switch-handle-on.bootstrap-switch-primary,.bootstrap-switch .bootstrap-switch-handle-off.bootstrap-switch-primary{color:#fff;background-color:#0275d8;border-color:#0275d8}.bootstrap-switch .bootstrap-switch-handle-on.bootstrap-switch-primary:hover,.bootstrap-switch .bootstrap-switch-handle-off.bootstrap-switch-primary:hover{color:#fff;background-color:#025aa5;border-color:#01549b}.bootstrap-switch .bootstrap-switch-handle-on.bootstrap-switch-primary:focus,.bootstrap-switch .bootstrap-switch-handle-on.bootstrap-switch-primary.focus,.bootstrap-switch .bootstrap-switch-handle-off.bootstrap-switch-primary:focus,.bootstrap-switch .bootstrap-switch-handle-off.bootstrap-switch-primary.focus{box-shadow:0 0 0 2px rgba(2,117,216,0.5)}.bootstrap-switch .bootstrap-switch-handle-on.bootstrap-switch-primary.disabled,.bootstrap-switch .bootstrap-switch-handle-on.bootstrap-switch-primary:disabled,.bootstrap-switch .bootstrap-switch-handle-off.bootstrap-switch-primary.disabled,.bootstrap-switch .bootstrap-switch-handle-off.bootstrap-switch-primary:disabled{background-color:#0275d8;border-color:#0275d8}.bootstrap-switch .bootstrap-switch-handle-on.bootstrap-switch-primary:active,.bootstrap-switch .bootstrap-switch-handle-on.bootstrap-switch-primary.active,.show>.bootstrap-switch .bootstrap-switch-handle-on.bootstrap-switch-primary.dropdown-toggle,.bootstrap-switch .bootstrap-switch-handle-off.bootstrap-switch-primary:active,.bootstrap-switch .bootstrap-switch-handle-off.bootstrap-switch-primary.active,.show>.bootstrap-switch .bootstrap-switch-handle-off.bootstrap-switch-primary.dropdown-toggle{color:#fff;background-color:#025aa5;background-image:none;border-color:#01549b}.bootstrap-switch .bootstrap-switch-handle-on.bootstrap-switch-secondary,.bootstrap-switch .bootstrap-switch-handle-off.bootstrap-switch-secondary{color:#292b2c;background-color:#fff;border-color:#ccc}.bootstrap-switch .bootstrap-switch-handle-on.bootstrap-switch-secondary:hover,.bootstrap-switch .bootstrap-switch-handle-off.bootstrap-switch-secondary:hover{color:#292b2c;background-color:#e6e6e6;border-color:#adadad}.bootstrap-switch .bootstrap-switch-handle-on.bootstrap-switch-secondary:focus,.bootstrap-switch .bootstrap-switch-handle-on.bootstrap-switch-secondary.focus,.bootstrap-switch .bootstrap-switch-handle-off.bootstrap-switch-secondary:focus,.bootstrap-switch .bootstrap-switch-handle-off.bootstrap-switch-secondary.focus{box-shadow:0 0 0 2px rgba(204,204,204,0.5)}.bootstrap-switch .bootstrap-switch-handle-on.bootstrap-switch-secondary.disabled,.bootstrap-switch .bootstrap-switch-handle-on.bootstrap-switch-secondary:disabled,.bootstrap-switch .bootstrap-switch-handle-off.bootstrap-switch-secondary.disabled,.bootstrap-switch .bootstrap-switch-handle-off.bootstrap-switch-secondary:disabled{background-color:#fff;border-color:#ccc}.bootstrap-switch .bootstrap-switch-handle-on.bootstrap-switch-secondary:active,.bootstrap-switch .bootstrap-switch-handle-on.bootstrap-switch-secondary.active,.show>.bootstrap-switch .bootstrap-switch-handle-on.bootstrap-switch-secondary.dropdown-toggle,.bootstrap-switch .bootstrap-switch-handle-off.bootstrap-switch-secondary:active,.bootstrap-switch .bootstrap-switch-handle-off.bootstrap-switch-secondary.active,.show>.bootstrap-switch .bootstrap-switch-handle-off.bootstrap-switch-secondary.dropdown-toggle{color:#292b2c;background-color:#e6e6e6;background-image:none;border-color:#adadad}.bootstrap-switch .bootstrap-switch-handle-on.bootstrap-switch-info,.bootstrap-switch .bootstrap-switch-handle-off.bootstrap-switch-info{color:#fff;background-color:#5bc0de;border-color:#5bc0de}.bootstrap-switch .bootstrap-switch-handle-on.bootstrap-switch-info:hover,.bootstrap-switch .bootstrap-switch-handle-off.bootstrap-switch-info:hover{color:#fff;background-color:#31b0d5;border-color:#2aabd2}.bootstrap-switch .bootstrap-switch-handle-on.bootstrap-switch-info:focus,.bootstrap-switch 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diff --git a/dist/css/bootstrap2/bootstrap-switch.css b/dist/css/bootstrap2/bootstrap-switch.css
deleted file mode 100644
index c0efa968..00000000
--- a/dist/css/bootstrap2/bootstrap-switch.css
+++ /dev/null
@@ -1,507 +0,0 @@
-/**
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diff --git a/dist/css/bootstrap2/bootstrap-switch.min.css b/dist/css/bootstrap2/bootstrap-switch.min.css
deleted file mode 100644
index bfb7d586..00000000
--- a/dist/css/bootstrap2/bootstrap-switch.min.css
+++ /dev/null
@@ -1,10 +0,0 @@
-/**
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-  */
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\ No newline at end of file
diff --git a/dist/css/bootstrap3/bootstrap-switch.css b/dist/css/bootstrap3/bootstrap-switch.css
deleted file mode 100644
index 43ba46c5..00000000
--- a/dist/css/bootstrap3/bootstrap-switch.css
+++ /dev/null
@@ -1,183 +0,0 @@
-/**
-  * bootstrap-switch - Turn checkboxes and radio buttons into toggle switches.
-  *
-  * @version v3.3.3
-  * @homepage http://www.bootstrap-switch.org
-  * @author Mattia Larentis <mattia@larentis.eu> (http://larentis.eu)
-  * @license Apache-2.0
-  */
-
-.bootstrap-switch {
-  display: inline-block;
-  direction: ltr;
-  cursor: pointer;
-  border-radius: 4px;
-  border: 1px solid;
-  border-color: #ccc;
-  position: relative;
-  text-align: left;
-  overflow: hidden;
-  line-height: 8px;
-  z-index: 0;
-  -webkit-user-select: none;
-  -moz-user-select: none;
-  -ms-user-select: none;
-  user-select: none;
-  vertical-align: middle;
-  -webkit-transition: border-color ease-in-out .15s, box-shadow ease-in-out .15s;
-  -o-transition: border-color ease-in-out .15s, box-shadow ease-in-out .15s;
-  transition: border-color ease-in-out .15s, box-shadow ease-in-out .15s;
-}
-.bootstrap-switch .bootstrap-switch-container {
-  display: inline-block;
-  top: 0;
-  border-radius: 4px;
-  -webkit-transform: translate3d(0, 0, 0);
-  transform: translate3d(0, 0, 0);
-}
-.bootstrap-switch .bootstrap-switch-handle-on,
-.bootstrap-switch .bootstrap-switch-handle-off,
-.bootstrap-switch .bootstrap-switch-label {
-  -webkit-box-sizing: border-box;
-  -moz-box-sizing: border-box;
-  box-sizing: border-box;
-  cursor: pointer;
-  display: inline-block !important;
-  height: 100%;
-  padding: 6px 12px;
-  font-size: 14px;
-  line-height: 20px;
-}
-.bootstrap-switch .bootstrap-switch-handle-on,
-.bootstrap-switch .bootstrap-switch-handle-off {
-  text-align: center;
-  z-index: 1;
-}
-.bootstrap-switch .bootstrap-switch-handle-on.bootstrap-switch-primary,
-.bootstrap-switch .bootstrap-switch-handle-off.bootstrap-switch-primary {
-  color: #fff;
-  background: #337ab7;
-}
-.bootstrap-switch .bootstrap-switch-handle-on.bootstrap-switch-info,
-.bootstrap-switch .bootstrap-switch-handle-off.bootstrap-switch-info {
-  color: #fff;
-  background: #5bc0de;
-}
-.bootstrap-switch .bootstrap-switch-handle-on.bootstrap-switch-success,
-.bootstrap-switch .bootstrap-switch-handle-off.bootstrap-switch-success {
-  color: #fff;
-  background: #5cb85c;
-}
-.bootstrap-switch .bootstrap-switch-handle-on.bootstrap-switch-warning,
-.bootstrap-switch .bootstrap-switch-handle-off.bootstrap-switch-warning {
-  background: #f0ad4e;
-  color: #fff;
-}
-.bootstrap-switch .bootstrap-switch-handle-on.bootstrap-switch-danger,
-.bootstrap-switch .bootstrap-switch-handle-off.bootstrap-switch-danger {
-  color: #fff;
-  background: #d9534f;
-}
-.bootstrap-switch .bootstrap-switch-handle-on.bootstrap-switch-default,
-.bootstrap-switch .bootstrap-switch-handle-off.bootstrap-switch-default {
-  color: #000;
-  background: #eeeeee;
-}
-.bootstrap-switch .bootstrap-switch-label {
-  text-align: center;
-  margin-top: -1px;
-  margin-bottom: -1px;
-  z-index: 100;
-  color: #333;
-  background: #fff;
-}
-.bootstrap-switch .bootstrap-switch-handle-on {
-  border-bottom-left-radius: 3px;
-  border-top-left-radius: 3px;
-}
-.bootstrap-switch .bootstrap-switch-handle-off {
-  border-bottom-right-radius: 3px;
-  border-top-right-radius: 3px;
-}
-.bootstrap-switch input[type='radio'],
-.bootstrap-switch input[type='checkbox'] {
-  position: absolute !important;
-  top: 0;
-  left: 0;
-  margin: 0;
-  z-index: -1;
-  opacity: 0;
-  filter: alpha(opacity=0);
-}
-.bootstrap-switch.bootstrap-switch-mini .bootstrap-switch-handle-on,
-.bootstrap-switch.bootstrap-switch-mini .bootstrap-switch-handle-off,
-.bootstrap-switch.bootstrap-switch-mini .bootstrap-switch-label {
-  padding: 1px 5px;
-  font-size: 12px;
-  line-height: 1.5;
-}
-.bootstrap-switch.bootstrap-switch-small .bootstrap-switch-handle-on,
-.bootstrap-switch.bootstrap-switch-small .bootstrap-switch-handle-off,
-.bootstrap-switch.bootstrap-switch-small .bootstrap-switch-label {
-  padding: 5px 10px;
-  font-size: 12px;
-  line-height: 1.5;
-}
-.bootstrap-switch.bootstrap-switch-large .bootstrap-switch-handle-on,
-.bootstrap-switch.bootstrap-switch-large .bootstrap-switch-handle-off,
-.bootstrap-switch.bootstrap-switch-large .bootstrap-switch-label {
-  padding: 6px 16px;
-  font-size: 18px;
-  line-height: 1.3333333;
-}
-.bootstrap-switch.bootstrap-switch-disabled,
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-.bootstrap-switch.bootstrap-switch-indeterminate {
-  cursor: default !important;
-}
-.bootstrap-switch.bootstrap-switch-disabled .bootstrap-switch-handle-on,
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-.bootstrap-switch.bootstrap-switch-indeterminate .bootstrap-switch-handle-off,
-.bootstrap-switch.bootstrap-switch-disabled .bootstrap-switch-label,
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-.bootstrap-switch.bootstrap-switch-indeterminate .bootstrap-switch-label {
-  opacity: 0.5;
-  filter: alpha(opacity=50);
-  cursor: default !important;
-}
-.bootstrap-switch.bootstrap-switch-animate .bootstrap-switch-container {
-  -webkit-transition: margin-left 0.5s;
-  -o-transition: margin-left 0.5s;
-  transition: margin-left 0.5s;
-}
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-  border-bottom-left-radius: 0;
-  border-top-left-radius: 0;
-  border-bottom-right-radius: 3px;
-  border-top-right-radius: 3px;
-}
-.bootstrap-switch.bootstrap-switch-inverse .bootstrap-switch-handle-off {
-  border-bottom-right-radius: 0;
-  border-top-right-radius: 0;
-  border-bottom-left-radius: 3px;
-  border-top-left-radius: 3px;
-}
-.bootstrap-switch.bootstrap-switch-focused {
-  border-color: #66afe9;
-  outline: 0;
-  -webkit-box-shadow: inset 0 1px 1px rgba(0,0,0,.075), 0 0 8px rgba(102, 175, 233, 0.6);
-  box-shadow: inset 0 1px 1px rgba(0,0,0,.075), 0 0 8px rgba(102, 175, 233, 0.6);
-}
-.bootstrap-switch.bootstrap-switch-on .bootstrap-switch-label,
-.bootstrap-switch.bootstrap-switch-inverse.bootstrap-switch-off .bootstrap-switch-label {
-  border-bottom-right-radius: 3px;
-  border-top-right-radius: 3px;
-}
-.bootstrap-switch.bootstrap-switch-off .bootstrap-switch-label,
-.bootstrap-switch.bootstrap-switch-inverse.bootstrap-switch-on .bootstrap-switch-label {
-  border-bottom-left-radius: 3px;
-  border-top-left-radius: 3px;
-}
diff --git a/dist/css/bootstrap3/bootstrap-switch.min.css b/dist/css/bootstrap3/bootstrap-switch.min.css
deleted file mode 100644
index a06a770d..00000000
--- a/dist/css/bootstrap3/bootstrap-switch.min.css
+++ /dev/null
@@ -1,10 +0,0 @@
-/**
-  * bootstrap-switch - Turn checkboxes and radio buttons into toggle switches.
-  *
-  * @version v3.3.3
-  * @homepage http://www.bootstrap-switch.org
-  * @author Mattia Larentis <mattia@larentis.eu> (http://larentis.eu)
-  * @license Apache-2.0
-  */
-
-.bootstrap-switch{display:inline-block;direction:ltr;cursor:pointer;border-radius:4px;border:1px solid #ccc;position:relative;text-align:left;overflow:hidden;line-height:8px;z-index:0;-webkit-user-select:none;-moz-user-select:none;-ms-user-select:none;user-select:none;vertical-align:middle;-webkit-transition:border-color ease-in-out .15s,box-shadow ease-in-out .15s;-o-transition:border-color ease-in-out .15s,box-shadow ease-in-out .15s;transition:border-color ease-in-out .15s,box-shadow ease-in-out .15s}.bootstrap-switch .bootstrap-switch-container{display:inline-block;top:0;border-radius:4px;-webkit-transform:translate3d(0,0,0);transform:translate3d(0,0,0)}.bootstrap-switch .bootstrap-switch-handle-off,.bootstrap-switch .bootstrap-switch-handle-on,.bootstrap-switch .bootstrap-switch-label{-webkit-box-sizing:border-box;-moz-box-sizing:border-box;box-sizing:border-box;cursor:pointer;display:inline-block!important;height:100%;padding:6px 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5px;font-size:12px;line-height:1.5}.bootstrap-switch.bootstrap-switch-small .bootstrap-switch-handle-off,.bootstrap-switch.bootstrap-switch-small .bootstrap-switch-handle-on,.bootstrap-switch.bootstrap-switch-small .bootstrap-switch-label{padding:5px 10px;font-size:12px;line-height:1.5}.bootstrap-switch.bootstrap-switch-large .bootstrap-switch-handle-off,.bootstrap-switch.bootstrap-switch-large .bootstrap-switch-handle-on,.bootstrap-switch.bootstrap-switch-large .bootstrap-switch-label{padding:6px 16px;font-size:18px;line-height:1.3333333}.bootstrap-switch.bootstrap-switch-disabled,.bootstrap-switch.bootstrap-switch-indeterminate,.bootstrap-switch.bootstrap-switch-readonly{cursor:default!important}.bootstrap-switch.bootstrap-switch-disabled .bootstrap-switch-handle-off,.bootstrap-switch.bootstrap-switch-disabled .bootstrap-switch-handle-on,.bootstrap-switch.bootstrap-switch-disabled .bootstrap-switch-label,.bootstrap-switch.bootstrap-switch-indeterminate .bootstrap-switch-handle-off,.bootstrap-switch.bootstrap-switch-indeterminate .bootstrap-switch-handle-on,.bootstrap-switch.bootstrap-switch-indeterminate .bootstrap-switch-label,.bootstrap-switch.bootstrap-switch-readonly .bootstrap-switch-handle-off,.bootstrap-switch.bootstrap-switch-readonly .bootstrap-switch-handle-on,.bootstrap-switch.bootstrap-switch-readonly .bootstrap-switch-label{opacity:.5;filter:alpha(opacity=50);cursor:default!important}.bootstrap-switch.bootstrap-switch-animate .bootstrap-switch-container{-webkit-transition:margin-left .5s;-o-transition:margin-left .5s;transition:margin-left .5s}.bootstrap-switch.bootstrap-switch-inverse .bootstrap-switch-handle-on{border-radius:0 3px 3px 0}.bootstrap-switch.bootstrap-switch-inverse .bootstrap-switch-handle-off{border-radius:3px 0 0 3px}.bootstrap-switch.bootstrap-switch-focused{border-color:#66afe9;outline:0;-webkit-box-shadow:inset 0 1px 1px rgba(0,0,0,.075),0 0 8px rgba(102,175,233,.6);box-shadow:inset 0 1px 1px rgba(0,0,0,.075),0 0 8px rgba(102,175,233,.6)}.bootstrap-switch.bootstrap-switch-inverse.bootstrap-switch-off .bootstrap-switch-label,.bootstrap-switch.bootstrap-switch-on .bootstrap-switch-label{border-bottom-right-radius:3px;border-top-right-radius:3px}.bootstrap-switch.bootstrap-switch-inverse.bootstrap-switch-on .bootstrap-switch-label,.bootstrap-switch.bootstrap-switch-off .bootstrap-switch-label{border-bottom-left-radius:3px;border-top-left-radius:3px}
\ No newline at end of file
diff --git a/dist/js/bootstrap-switch.js b/dist/js/bootstrap-switch.js
index f3a1e3ec..99c556e5 100644
--- a/dist/js/bootstrap-switch.js
+++ b/dist/js/bootstrap-switch.js
@@ -1,7 +1,7 @@
 /**
   * bootstrap-switch - Turn checkboxes and radio buttons into toggle switches.
   *
-  * @version v3.3.3
+  * @version v4.0.0-alpha.1
   * @homepage http://www.bootstrap-switch.org
   * @author Mattia Larentis <mattia@larentis.eu> (http://larentis.eu)
   * @license Apache-2.0
@@ -719,7 +719,7 @@ function _classCallCheck(instance, Constructor) { if (!(instance instanceof Cons
     inverse: false,
     radioAllOff: false,
     onColor: 'primary',
-    offColor: 'default',
+    offColor: 'secondary',
     onText: 'ON',
     offText: 'OFF',
     labelText: '&nbsp',
diff --git a/dist/js/bootstrap-switch.min.js b/dist/js/bootstrap-switch.min.js
index 5edca727..9829c91d 100644
--- a/dist/js/bootstrap-switch.min.js
+++ b/dist/js/bootstrap-switch.min.js
@@ -1,10 +1,10 @@
 /**
   * bootstrap-switch - Turn checkboxes and radio buttons into toggle switches.
   *
-  * @version v3.3.3
+  * @version v4.0.0-alpha.1
   * @homepage http://www.bootstrap-switch.org
   * @author Mattia Larentis <mattia@larentis.eu> (http://larentis.eu)
   * @license Apache-2.0
   */
 
-'use strict';var _createClass=function(){function a(b,c){for(var e,d=0;d<c.length;d++)e=c[d],e.enumerable=e.enumerable||!1,e.configurable=!0,'value'in e&&(e.writable=!0),Object.defineProperty(b,e.key,e)}return function(b,c,d){return c&&a(b.prototype,c),d&&a(b,d),b}}();function _classCallCheck(a,b){if(!(a instanceof b))throw new TypeError('Cannot call a class as a function')}(function(a,b){var c=function(){function d(e){var g=this,f=1<arguments.length&&void 0!==arguments[1]?arguments[1]:{};_classCallCheck(this,d),this.$element=a(e),this.options=a.extend({},a.fn.bootstrapSwitch.defaults,this._getElementOptions(),f),this.prevOptions={},this.$wrapper=a('<div>',{class:function _class(){var h=[];return h.push(g.options.state?'on':'off'),g.options.size&&h.push(g.options.size),g.options.disabled&&h.push('disabled'),g.options.readonly&&h.push('readonly'),g.options.indeterminate&&h.push('indeterminate'),g.options.inverse&&h.push('inverse'),g.$element.attr('id')&&h.push('id-'+g.$element.attr('id')),h.map(g._getClass.bind(g)).concat([g.options.baseClass],g._getClasses(g.options.wrapperClass)).join(' ')}}),this.$container=a('<div>',{class:this._getClass('container')}),this.$on=a('<span>',{html:this.options.onText,class:this._getClass('handle-on')+' '+this._getClass(this.options.onColor)}),this.$off=a('<span>',{html:this.options.offText,class:this._getClass('handle-off')+' '+this._getClass(this.options.offColor)}),this.$label=a('<span>',{html:this.options.labelText,class:this._getClass('label')}),this.$element.on('init.bootstrapSwitch',this.options.onInit.bind(this,e)),this.$element.on('switchChange.bootstrapSwitch',function(){for(var j=arguments.length,h=Array(j),k=0;k<j;k++)h[k]=arguments[k];!1===g.options.onSwitchChange.apply(e,h)&&(g.$element.is(':radio')?a('[name="'+g.$element.attr('name')+'"]').trigger('previousState.bootstrapSwitch',!0):g.$element.trigger('previousState.bootstrapSwitch',!0))}),this.$container=this.$element.wrap(this.$container).parent(),this.$wrapper=this.$container.wrap(this.$wrapper).parent(),this.$element.before(this.options.inverse?this.$off:this.$on).before(this.$label).before(this.options.inverse?this.$on:this.$off),this.options.indeterminate&&this.$element.prop('indeterminate',!0),this._init(),this._elementHandlers(),this._handleHandlers(),this._labelHandlers(),this._formHandler(),this._externalLabelHandler(),this.$element.trigger('init.bootstrapSwitch',this.options.state)}return _createClass(d,[{key:'setPrevOptions',value:function setPrevOptions(){this.prevOptions=Object.assign({},this.options)}},{key:'state',value:function state(e,f){return'undefined'==typeof e?this.options.state:this.options.disabled||this.options.readonly||this.options.state&&!this.options.radioAllOff&&this.$element.is(':radio')?this.$element:(this.$element.is(':radio')?a('[name="'+this.$element.attr('name')+'"]').trigger('setPreviousOptions.bootstrapSwitch'):this.$element.trigger('setPreviousOptions.bootstrapSwitch'),this.options.indeterminate&&this.indeterminate(!1),this.$element.prop('checked',!!e).trigger('change.bootstrapSwitch',f),this.$element)}},{key:'toggleState',value:function toggleState(e){return this.options.disabled||this.options.readonly?this.$element:this.options.indeterminate?(this.indeterminate(!1),this.state(!0)):this.$element.prop('checked',!this.options.state).trigger('change.bootstrapSwitch',e)}},{key:'size',value:function size(e){return'undefined'==typeof e?this.options.size:(null!=this.options.size&&this.$wrapper.removeClass(this._getClass(this.options.size)),e&&this.$wrapper.addClass(this._getClass(e)),this._width(),this._containerPosition(),this.options.size=e,this.$element)}},{key:'animate',value:function animate(e){return'undefined'==typeof e?this.options.animate:this.options.animate===!!e?this.$element:this.toggleAnimate()}},{key:'toggleAnimate',value:function toggleAnimate(){return this.options.animate=!this.options.animate,this.$wrapper.toggleClass(this._getClass('animate')),this.$element}},{key:'disabled',value:function disabled(e){return'undefined'==typeof e?this.options.disabled:this.options.disabled===!!e?this.$element:this.toggleDisabled()}},{key:'toggleDisabled',value:function toggleDisabled(){return this.options.disabled=!this.options.disabled,this.$element.prop('disabled',this.options.disabled),this.$wrapper.toggleClass(this._getClass('disabled')),this.$element}},{key:'readonly',value:function readonly(e){return'undefined'==typeof e?this.options.readonly:this.options.readonly===!!e?this.$element:this.toggleReadonly()}},{key:'toggleReadonly',value:function toggleReadonly(){return this.options.readonly=!this.options.readonly,this.$element.prop('readonly',this.options.readonly),this.$wrapper.toggleClass(this._getClass('readonly')),this.$element}},{key:'indeterminate',value:function indeterminate(e){return'undefined'==typeof e?this.options.indeterminate:this.options.indeterminate===!!e?this.$element:this.toggleIndeterminate()}},{key:'toggleIndeterminate',value:function toggleIndeterminate(){return this.options.indeterminate=!this.options.indeterminate,this.$element.prop('indeterminate',this.options.indeterminate),this.$wrapper.toggleClass(this._getClass('indeterminate')),this._containerPosition(),this.$element}},{key:'inverse',value:function inverse(e){return'undefined'==typeof e?this.options.inverse:this.options.inverse===!!e?this.$element:this.toggleInverse()}},{key:'toggleInverse',value:function toggleInverse(){this.$wrapper.toggleClass(this._getClass('inverse'));var e=this.$on.clone(!0),f=this.$off.clone(!0);return this.$on.replaceWith(f),this.$off.replaceWith(e),this.$on=f,this.$off=e,this.options.inverse=!this.options.inverse,this.$element}},{key:'onColor',value:function onColor(e){return'undefined'==typeof e?this.options.onColor:(this.options.onColor&&this.$on.removeClass(this._getClass(this.options.onColor)),this.$on.addClass(this._getClass(e)),this.options.onColor=e,this.$element)}},{key:'offColor',value:function offColor(e){return'undefined'==typeof e?this.options.offColor:(this.options.offColor&&this.$off.removeClass(this._getClass(this.options.offColor)),this.$off.addClass(this._getClass(e)),this.options.offColor=e,this.$element)}},{key:'onText',value:function onText(e){return'undefined'==typeof e?this.options.onText:(this.$on.html(e),this._width(),this._containerPosition(),this.options.onText=e,this.$element)}},{key:'offText',value:function offText(e){return'undefined'==typeof e?this.options.offText:(this.$off.html(e),this._width(),this._containerPosition(),this.options.offText=e,this.$element)}},{key:'labelText',value:function labelText(e){return'undefined'==typeof e?this.options.labelText:(this.$label.html(e),this._width(),this.options.labelText=e,this.$element)}},{key:'handleWidth',value:function handleWidth(e){return'undefined'==typeof e?this.options.handleWidth:(this.options.handleWidth=e,this._width(),this._containerPosition(),this.$element)}},{key:'labelWidth',value:function labelWidth(e){return'undefined'==typeof e?this.options.labelWidth:(this.options.labelWidth=e,this._width(),this._containerPosition(),this.$element)}},{key:'baseClass',value:function baseClass(){return this.options.baseClass}},{key:'wrapperClass',value:function wrapperClass(e){return'undefined'==typeof e?this.options.wrapperClass:(e||(e=a.fn.bootstrapSwitch.defaults.wrapperClass),this.$wrapper.removeClass(this._getClasses(this.options.wrapperClass).join(' ')),this.$wrapper.addClass(this._getClasses(e).join(' ')),this.options.wrapperClass=e,this.$element)}},{key:'radioAllOff',value:function radioAllOff(e){if('undefined'==typeof e)return this.options.radioAllOff;var f=!!e;return this.options.radioAllOff===f?this.$element:(this.options.radioAllOff=f,this.$element)}},{key:'onInit',value:function onInit(e){return'undefined'==typeof e?this.options.onInit:(e||(e=a.fn.bootstrapSwitch.defaults.onInit),this.options.onInit=e,this.$element)}},{key:'onSwitchChange',value:function onSwitchChange(e){return'undefined'==typeof e?this.options.onSwitchChange:(e||(e=a.fn.bootstrapSwitch.defaults.onSwitchChange),this.options.onSwitchChange=e,this.$element)}},{key:'destroy',value:function destroy(){var e=this.$element.closest('form');return e.length&&e.off('reset.bootstrapSwitch').removeData('bootstrap-switch'),this.$container.children().not(this.$element).remove(),this.$element.unwrap().unwrap().off('.bootstrapSwitch').removeData('bootstrap-switch'),this.$element}},{key:'_getElementOptions',value:function _getElementOptions(){return{state:this.$element.is(':checked'),size:this.$element.data('size'),animate:this.$element.data('animate'),disabled:this.$element.is(':disabled'),readonly:this.$element.is('[readonly]'),indeterminate:this.$element.data('indeterminate'),inverse:this.$element.data('inverse'),radioAllOff:this.$element.data('radio-all-off'),onColor:this.$element.data('on-color'),offColor:this.$element.data('off-color'),onText:this.$element.data('on-text'),offText:this.$element.data('off-text'),labelText:this.$element.data('label-text'),handleWidth:this.$element.data('handle-width'),labelWidth:this.$element.data('label-width'),baseClass:this.$element.data('base-class'),wrapperClass:this.$element.data('wrapper-class')}}},{key:'_width',value:function _width(){var g=this,e=this.$on.add(this.$off).add(this.$label).css('width',''),f=void 0;return f='auto'===this.options.handleWidth?Math.round(Math.max(this.$on.width(),this.$off.width())):this.options.handleWidth,e.width(f),this.$label.width(function(h,j){return'auto'===g.options.labelWidth?j<f?f:j:g.options.labelWidth}),this._handleWidth=this.$on.outerWidth(),this._labelWidth=this.$label.outerWidth(),this.$container.width(2*this._handleWidth+this._labelWidth),this.$wrapper.width(this._handleWidth+this._labelWidth)}},{key:'_containerPosition',value:function _containerPosition(){var g=this,e=0<arguments.length&&void 0!==arguments[0]?arguments[0]:this.options.state,f=arguments[1];this.$container.css('margin-left',function(){var h=[0,'-'+g._handleWidth+'px'];return g.options.indeterminate?'-'+g._handleWidth/2+'px':e?g.options.inverse?h[1]:h[0]:g.options.inverse?h[0]:h[1]})}},{key:'_init',value:function _init(){var f=this,e=function(){f.setPrevOptions(),f._width(),f._containerPosition(),setTimeout(function(){if(f.options.animate)return f.$wrapper.addClass(f._getClass('animate'))},50)};if(this.$wrapper.is(':visible'))return void e();var g=b.setInterval(function(){if(f.$wrapper.is(':visible'))return e(),b.clearInterval(g)},50)}},{key:'_elementHandlers',value:function _elementHandlers(){var e=this;return this.$element.on({'setPreviousOptions.bootstrapSwitch':this.setPrevOptions.bind(this),'previousState.bootstrapSwitch':function previousStateBootstrapSwitch(){e.options=e.prevOptions,e.options.indeterminate&&e.$wrapper.addClass(e._getClass('indeterminate')),e.$element.prop('checked',e.options.state).trigger('change.bootstrapSwitch',!0)},'change.bootstrapSwitch':function changeBootstrapSwitch(f,g){f.preventDefault(),f.stopImmediatePropagation();var h=e.$element.is(':checked');e._containerPosition(h),h===e.options.state||(e.options.state=h,e.$wrapper.toggleClass(e._getClass('off')).toggleClass(e._getClass('on')),!g&&(e.$element.is(':radio')&&a('[name="'+e.$element.attr('name')+'"]').not(e.$element).prop('checked',!1).trigger('change.bootstrapSwitch',!0),e.$element.trigger('switchChange.bootstrapSwitch',[h])))},'focus.bootstrapSwitch':function focusBootstrapSwitch(f){f.preventDefault(),e.$wrapper.addClass(e._getClass('focused'))},'blur.bootstrapSwitch':function blurBootstrapSwitch(f){f.preventDefault(),e.$wrapper.removeClass(e._getClass('focused'))},'keydown.bootstrapSwitch':function keydownBootstrapSwitch(f){!f.which||e.options.disabled||e.options.readonly||(37===f.which||39===f.which)&&(f.preventDefault(),f.stopImmediatePropagation(),e.state(39===f.which))}})}},{key:'_handleHandlers',value:function _handleHandlers(){var e=this;return this.$on.on('click.bootstrapSwitch',function(f){return f.preventDefault(),f.stopPropagation(),e.state(!1),e.$element.trigger('focus.bootstrapSwitch')}),this.$off.on('click.bootstrapSwitch',function(f){return f.preventDefault(),f.stopPropagation(),e.state(!0),e.$element.trigger('focus.bootstrapSwitch')})}},{key:'_labelHandlers',value:function _labelHandlers(){var f=this;this.$label.on({click:function click(g){g.stopPropagation()},'mousedown.bootstrapSwitch touchstart.bootstrapSwitch':function mousedownBootstrapSwitchTouchstartBootstrapSwitch(g){f._dragStart||f.options.disabled||f.options.readonly||(g.preventDefault(),g.stopPropagation(),f._dragStart=(g.pageX||g.originalEvent.touches[0].pageX)-parseInt(f.$container.css('margin-left'),10),f.options.animate&&f.$wrapper.removeClass(f._getClass('animate')),f.$element.trigger('focus.bootstrapSwitch'))},'mousemove.bootstrapSwitch touchmove.bootstrapSwitch':function mousemoveBootstrapSwitchTouchmoveBootstrapSwitch(g){if(null!=f._dragStart){var h=(g.pageX||g.originalEvent.touches[0].pageX)-f._dragStart;g.preventDefault(),h<-f._handleWidth||0<h||(f._dragEnd=h,f.$container.css('margin-left',f._dragEnd+'px'))}},'mouseup.bootstrapSwitch touchend.bootstrapSwitch':function mouseupBootstrapSwitchTouchendBootstrapSwitch(g){if(f._dragStart){if(g.preventDefault(),f.options.animate&&f.$wrapper.addClass(f._getClass('animate')),f._dragEnd){var h=f._dragEnd>-(f._handleWidth/2);f._dragEnd=!1,f.state(f.options.inverse?!h:h)}else f.state(!f.options.state);f._dragStart=!1}},'mouseleave.bootstrapSwitch':function mouseleaveBootstrapSwitch(){f.$label.trigger('mouseup.bootstrapSwitch')}})}},{key:'_externalLabelHandler',value:function _externalLabelHandler(){var f=this,e=this.$element.closest('label');e.on('click',function(g){g.preventDefault(),g.stopImmediatePropagation(),g.target===e[0]&&f.toggleState()})}},{key:'_formHandler',value:function _formHandler(){var e=this.$element.closest('form');e.data('bootstrap-switch')||e.on('reset.bootstrapSwitch',function(){b.setTimeout(function(){e.find('input').filter(function(){return a(this).data('bootstrap-switch')}).each(function(){return a(this).bootstrapSwitch('state',this.checked)})},1)}).data('bootstrap-switch',!0)}},{key:'_getClass',value:function _getClass(e){return this.options.baseClass+'-'+e}},{key:'_getClasses',value:function _getClasses(e){return a.isArray(e)?e.map(this._getClass.bind(this)):[this._getClass(e)]}}]),d}();a.fn.bootstrapSwitch=function(d){for(var f=arguments.length,e=Array(1<f?f-1:0),g=1;g<f;g++)e[g-1]=arguments[g];var h=this;return this.each(function(){var j=a(this),k=j.data('bootstrap-switch');k||(k=new c(this,d),j.data('bootstrap-switch',k)),'string'==typeof d&&(h=k[d].apply(k,e))}),h},a.fn.bootstrapSwitch.Constructor=c,a.fn.bootstrapSwitch.defaults={state:!0,size:null,animate:!0,disabled:!1,readonly:!1,indeterminate:!1,inverse:!1,radioAllOff:!1,onColor:'primary',offColor:'default',onText:'ON',offText:'OFF',labelText:'&nbsp',handleWidth:'auto',labelWidth:'auto',baseClass:'bootstrap-switch',wrapperClass:'wrapper',onInit:function onInit(){},onSwitchChange:function onSwitchChange(){}}})(window.jQuery,window);
+'use strict';var _createClass=function(){function a(b,c){for(var e,d=0;d<c.length;d++)e=c[d],e.enumerable=e.enumerable||!1,e.configurable=!0,'value'in e&&(e.writable=!0),Object.defineProperty(b,e.key,e)}return function(b,c,d){return c&&a(b.prototype,c),d&&a(b,d),b}}();function _classCallCheck(a,b){if(!(a instanceof b))throw new TypeError('Cannot call a class as a function')}(function(a,b){var c=function(){function d(e){var g=this,f=1<arguments.length&&void 0!==arguments[1]?arguments[1]:{};_classCallCheck(this,d),this.$element=a(e),this.options=a.extend({},a.fn.bootstrapSwitch.defaults,this._getElementOptions(),f),this.prevOptions={},this.$wrapper=a('<div>',{class:function _class(){var h=[];return h.push(g.options.state?'on':'off'),g.options.size&&h.push(g.options.size),g.options.disabled&&h.push('disabled'),g.options.readonly&&h.push('readonly'),g.options.indeterminate&&h.push('indeterminate'),g.options.inverse&&h.push('inverse'),g.$element.attr('id')&&h.push('id-'+g.$element.attr('id')),h.map(g._getClass.bind(g)).concat([g.options.baseClass],g._getClasses(g.options.wrapperClass)).join(' ')}}),this.$container=a('<div>',{class:this._getClass('container')}),this.$on=a('<span>',{html:this.options.onText,class:this._getClass('handle-on')+' '+this._getClass(this.options.onColor)}),this.$off=a('<span>',{html:this.options.offText,class:this._getClass('handle-off')+' '+this._getClass(this.options.offColor)}),this.$label=a('<span>',{html:this.options.labelText,class:this._getClass('label')}),this.$element.on('init.bootstrapSwitch',this.options.onInit.bind(this,e)),this.$element.on('switchChange.bootstrapSwitch',function(){for(var j=arguments.length,h=Array(j),k=0;k<j;k++)h[k]=arguments[k];!1===g.options.onSwitchChange.apply(e,h)&&(g.$element.is(':radio')?a('[name="'+g.$element.attr('name')+'"]').trigger('previousState.bootstrapSwitch',!0):g.$element.trigger('previousState.bootstrapSwitch',!0))}),this.$container=this.$element.wrap(this.$container).parent(),this.$wrapper=this.$container.wrap(this.$wrapper).parent(),this.$element.before(this.options.inverse?this.$off:this.$on).before(this.$label).before(this.options.inverse?this.$on:this.$off),this.options.indeterminate&&this.$element.prop('indeterminate',!0),this._init(),this._elementHandlers(),this._handleHandlers(),this._labelHandlers(),this._formHandler(),this._externalLabelHandler(),this.$element.trigger('init.bootstrapSwitch',this.options.state)}return _createClass(d,[{key:'setPrevOptions',value:function setPrevOptions(){this.prevOptions=Object.assign({},this.options)}},{key:'state',value:function state(e,f){return'undefined'==typeof e?this.options.state:this.options.disabled||this.options.readonly||this.options.state&&!this.options.radioAllOff&&this.$element.is(':radio')?this.$element:(this.$element.is(':radio')?a('[name="'+this.$element.attr('name')+'"]').trigger('setPreviousOptions.bootstrapSwitch'):this.$element.trigger('setPreviousOptions.bootstrapSwitch'),this.options.indeterminate&&this.indeterminate(!1),this.$element.prop('checked',!!e).trigger('change.bootstrapSwitch',f),this.$element)}},{key:'toggleState',value:function toggleState(e){return this.options.disabled||this.options.readonly?this.$element:this.options.indeterminate?(this.indeterminate(!1),this.state(!0)):this.$element.prop('checked',!this.options.state).trigger('change.bootstrapSwitch',e)}},{key:'size',value:function size(e){return'undefined'==typeof e?this.options.size:(null!=this.options.size&&this.$wrapper.removeClass(this._getClass(this.options.size)),e&&this.$wrapper.addClass(this._getClass(e)),this._width(),this._containerPosition(),this.options.size=e,this.$element)}},{key:'animate',value:function animate(e){return'undefined'==typeof e?this.options.animate:this.options.animate===!!e?this.$element:this.toggleAnimate()}},{key:'toggleAnimate',value:function toggleAnimate(){return this.options.animate=!this.options.animate,this.$wrapper.toggleClass(this._getClass('animate')),this.$element}},{key:'disabled',value:function disabled(e){return'undefined'==typeof e?this.options.disabled:this.options.disabled===!!e?this.$element:this.toggleDisabled()}},{key:'toggleDisabled',value:function toggleDisabled(){return this.options.disabled=!this.options.disabled,this.$element.prop('disabled',this.options.disabled),this.$wrapper.toggleClass(this._getClass('disabled')),this.$element}},{key:'readonly',value:function readonly(e){return'undefined'==typeof e?this.options.readonly:this.options.readonly===!!e?this.$element:this.toggleReadonly()}},{key:'toggleReadonly',value:function toggleReadonly(){return this.options.readonly=!this.options.readonly,this.$element.prop('readonly',this.options.readonly),this.$wrapper.toggleClass(this._getClass('readonly')),this.$element}},{key:'indeterminate',value:function indeterminate(e){return'undefined'==typeof e?this.options.indeterminate:this.options.indeterminate===!!e?this.$element:this.toggleIndeterminate()}},{key:'toggleIndeterminate',value:function toggleIndeterminate(){return this.options.indeterminate=!this.options.indeterminate,this.$element.prop('indeterminate',this.options.indeterminate),this.$wrapper.toggleClass(this._getClass('indeterminate')),this._containerPosition(),this.$element}},{key:'inverse',value:function inverse(e){return'undefined'==typeof e?this.options.inverse:this.options.inverse===!!e?this.$element:this.toggleInverse()}},{key:'toggleInverse',value:function toggleInverse(){this.$wrapper.toggleClass(this._getClass('inverse'));var e=this.$on.clone(!0),f=this.$off.clone(!0);return this.$on.replaceWith(f),this.$off.replaceWith(e),this.$on=f,this.$off=e,this.options.inverse=!this.options.inverse,this.$element}},{key:'onColor',value:function onColor(e){return'undefined'==typeof e?this.options.onColor:(this.options.onColor&&this.$on.removeClass(this._getClass(this.options.onColor)),this.$on.addClass(this._getClass(e)),this.options.onColor=e,this.$element)}},{key:'offColor',value:function offColor(e){return'undefined'==typeof e?this.options.offColor:(this.options.offColor&&this.$off.removeClass(this._getClass(this.options.offColor)),this.$off.addClass(this._getClass(e)),this.options.offColor=e,this.$element)}},{key:'onText',value:function onText(e){return'undefined'==typeof e?this.options.onText:(this.$on.html(e),this._width(),this._containerPosition(),this.options.onText=e,this.$element)}},{key:'offText',value:function offText(e){return'undefined'==typeof e?this.options.offText:(this.$off.html(e),this._width(),this._containerPosition(),this.options.offText=e,this.$element)}},{key:'labelText',value:function labelText(e){return'undefined'==typeof e?this.options.labelText:(this.$label.html(e),this._width(),this.options.labelText=e,this.$element)}},{key:'handleWidth',value:function handleWidth(e){return'undefined'==typeof e?this.options.handleWidth:(this.options.handleWidth=e,this._width(),this._containerPosition(),this.$element)}},{key:'labelWidth',value:function labelWidth(e){return'undefined'==typeof e?this.options.labelWidth:(this.options.labelWidth=e,this._width(),this._containerPosition(),this.$element)}},{key:'baseClass',value:function baseClass(){return this.options.baseClass}},{key:'wrapperClass',value:function wrapperClass(e){return'undefined'==typeof e?this.options.wrapperClass:(e||(e=a.fn.bootstrapSwitch.defaults.wrapperClass),this.$wrapper.removeClass(this._getClasses(this.options.wrapperClass).join(' ')),this.$wrapper.addClass(this._getClasses(e).join(' ')),this.options.wrapperClass=e,this.$element)}},{key:'radioAllOff',value:function radioAllOff(e){if('undefined'==typeof e)return this.options.radioAllOff;var f=!!e;return this.options.radioAllOff===f?this.$element:(this.options.radioAllOff=f,this.$element)}},{key:'onInit',value:function onInit(e){return'undefined'==typeof e?this.options.onInit:(e||(e=a.fn.bootstrapSwitch.defaults.onInit),this.options.onInit=e,this.$element)}},{key:'onSwitchChange',value:function onSwitchChange(e){return'undefined'==typeof e?this.options.onSwitchChange:(e||(e=a.fn.bootstrapSwitch.defaults.onSwitchChange),this.options.onSwitchChange=e,this.$element)}},{key:'destroy',value:function destroy(){var e=this.$element.closest('form');return e.length&&e.off('reset.bootstrapSwitch').removeData('bootstrap-switch'),this.$container.children().not(this.$element).remove(),this.$element.unwrap().unwrap().off('.bootstrapSwitch').removeData('bootstrap-switch'),this.$element}},{key:'_getElementOptions',value:function _getElementOptions(){return{state:this.$element.is(':checked'),size:this.$element.data('size'),animate:this.$element.data('animate'),disabled:this.$element.is(':disabled'),readonly:this.$element.is('[readonly]'),indeterminate:this.$element.data('indeterminate'),inverse:this.$element.data('inverse'),radioAllOff:this.$element.data('radio-all-off'),onColor:this.$element.data('on-color'),offColor:this.$element.data('off-color'),onText:this.$element.data('on-text'),offText:this.$element.data('off-text'),labelText:this.$element.data('label-text'),handleWidth:this.$element.data('handle-width'),labelWidth:this.$element.data('label-width'),baseClass:this.$element.data('base-class'),wrapperClass:this.$element.data('wrapper-class')}}},{key:'_width',value:function _width(){var g=this,e=this.$on.add(this.$off).add(this.$label).css('width',''),f=void 0;return f='auto'===this.options.handleWidth?Math.round(Math.max(this.$on.width(),this.$off.width())):this.options.handleWidth,e.width(f),this.$label.width(function(h,j){return'auto'===g.options.labelWidth?j<f?f:j:g.options.labelWidth}),this._handleWidth=this.$on.outerWidth(),this._labelWidth=this.$label.outerWidth(),this.$container.width(2*this._handleWidth+this._labelWidth),this.$wrapper.width(this._handleWidth+this._labelWidth)}},{key:'_containerPosition',value:function _containerPosition(){var g=this,e=0<arguments.length&&void 0!==arguments[0]?arguments[0]:this.options.state,f=arguments[1];this.$container.css('margin-left',function(){var h=[0,'-'+g._handleWidth+'px'];return g.options.indeterminate?'-'+g._handleWidth/2+'px':e?g.options.inverse?h[1]:h[0]:g.options.inverse?h[0]:h[1]})}},{key:'_init',value:function _init(){var f=this,e=function(){f.setPrevOptions(),f._width(),f._containerPosition(),setTimeout(function(){if(f.options.animate)return f.$wrapper.addClass(f._getClass('animate'))},50)};if(this.$wrapper.is(':visible'))return void e();var g=b.setInterval(function(){if(f.$wrapper.is(':visible'))return e(),b.clearInterval(g)},50)}},{key:'_elementHandlers',value:function _elementHandlers(){var e=this;return this.$element.on({'setPreviousOptions.bootstrapSwitch':this.setPrevOptions.bind(this),'previousState.bootstrapSwitch':function previousStateBootstrapSwitch(){e.options=e.prevOptions,e.options.indeterminate&&e.$wrapper.addClass(e._getClass('indeterminate')),e.$element.prop('checked',e.options.state).trigger('change.bootstrapSwitch',!0)},'change.bootstrapSwitch':function changeBootstrapSwitch(f,g){f.preventDefault(),f.stopImmediatePropagation();var h=e.$element.is(':checked');e._containerPosition(h),h===e.options.state||(e.options.state=h,e.$wrapper.toggleClass(e._getClass('off')).toggleClass(e._getClass('on')),!g&&(e.$element.is(':radio')&&a('[name="'+e.$element.attr('name')+'"]').not(e.$element).prop('checked',!1).trigger('change.bootstrapSwitch',!0),e.$element.trigger('switchChange.bootstrapSwitch',[h])))},'focus.bootstrapSwitch':function focusBootstrapSwitch(f){f.preventDefault(),e.$wrapper.addClass(e._getClass('focused'))},'blur.bootstrapSwitch':function blurBootstrapSwitch(f){f.preventDefault(),e.$wrapper.removeClass(e._getClass('focused'))},'keydown.bootstrapSwitch':function keydownBootstrapSwitch(f){!f.which||e.options.disabled||e.options.readonly||(37===f.which||39===f.which)&&(f.preventDefault(),f.stopImmediatePropagation(),e.state(39===f.which))}})}},{key:'_handleHandlers',value:function _handleHandlers(){var e=this;return this.$on.on('click.bootstrapSwitch',function(f){return f.preventDefault(),f.stopPropagation(),e.state(!1),e.$element.trigger('focus.bootstrapSwitch')}),this.$off.on('click.bootstrapSwitch',function(f){return f.preventDefault(),f.stopPropagation(),e.state(!0),e.$element.trigger('focus.bootstrapSwitch')})}},{key:'_labelHandlers',value:function _labelHandlers(){var f=this;this.$label.on({click:function click(g){g.stopPropagation()},'mousedown.bootstrapSwitch touchstart.bootstrapSwitch':function mousedownBootstrapSwitchTouchstartBootstrapSwitch(g){f._dragStart||f.options.disabled||f.options.readonly||(g.preventDefault(),g.stopPropagation(),f._dragStart=(g.pageX||g.originalEvent.touches[0].pageX)-parseInt(f.$container.css('margin-left'),10),f.options.animate&&f.$wrapper.removeClass(f._getClass('animate')),f.$element.trigger('focus.bootstrapSwitch'))},'mousemove.bootstrapSwitch touchmove.bootstrapSwitch':function mousemoveBootstrapSwitchTouchmoveBootstrapSwitch(g){if(null!=f._dragStart){var h=(g.pageX||g.originalEvent.touches[0].pageX)-f._dragStart;g.preventDefault(),h<-f._handleWidth||0<h||(f._dragEnd=h,f.$container.css('margin-left',f._dragEnd+'px'))}},'mouseup.bootstrapSwitch touchend.bootstrapSwitch':function mouseupBootstrapSwitchTouchendBootstrapSwitch(g){if(f._dragStart){if(g.preventDefault(),f.options.animate&&f.$wrapper.addClass(f._getClass('animate')),f._dragEnd){var h=f._dragEnd>-(f._handleWidth/2);f._dragEnd=!1,f.state(f.options.inverse?!h:h)}else f.state(!f.options.state);f._dragStart=!1}},'mouseleave.bootstrapSwitch':function mouseleaveBootstrapSwitch(){f.$label.trigger('mouseup.bootstrapSwitch')}})}},{key:'_externalLabelHandler',value:function _externalLabelHandler(){var f=this,e=this.$element.closest('label');e.on('click',function(g){g.preventDefault(),g.stopImmediatePropagation(),g.target===e[0]&&f.toggleState()})}},{key:'_formHandler',value:function _formHandler(){var e=this.$element.closest('form');e.data('bootstrap-switch')||e.on('reset.bootstrapSwitch',function(){b.setTimeout(function(){e.find('input').filter(function(){return a(this).data('bootstrap-switch')}).each(function(){return a(this).bootstrapSwitch('state',this.checked)})},1)}).data('bootstrap-switch',!0)}},{key:'_getClass',value:function _getClass(e){return this.options.baseClass+'-'+e}},{key:'_getClasses',value:function _getClasses(e){return a.isArray(e)?e.map(this._getClass.bind(this)):[this._getClass(e)]}}]),d}();a.fn.bootstrapSwitch=function(d){for(var f=arguments.length,e=Array(1<f?f-1:0),g=1;g<f;g++)e[g-1]=arguments[g];var h=this;return this.each(function(){var j=a(this),k=j.data('bootstrap-switch');k||(k=new c(this,d),j.data('bootstrap-switch',k)),'string'==typeof d&&(h=k[d].apply(k,e))}),h},a.fn.bootstrapSwitch.Constructor=c,a.fn.bootstrapSwitch.defaults={state:!0,size:null,animate:!0,disabled:!1,readonly:!1,indeterminate:!1,inverse:!1,radioAllOff:!1,onColor:'primary',offColor:'secondary',onText:'ON',offText:'OFF',labelText:'&nbsp',handleWidth:'auto',labelWidth:'auto',baseClass:'bootstrap-switch',wrapperClass:'wrapper',onInit:function onInit(){},onSwitchChange:function onSwitchChange(){}}})(window.jQuery,window);
diff --git a/docs/index.html b/docs/index.html
index aba50211..6ee9b813 100644
--- a/docs/index.html
+++ b/docs/index.html
@@ -1,4 +1,4 @@
-<!DOCTYPE html><html lang="en"><head><meta charset="utf-8"><meta http-equiv="x-ua-Compatible" content="ie=edge"><meta name="viewport" content="width=device-width, initial-scale=1.0"><meta name="description" content="Turn checkboxes and radio buttons into toggle switches."><meta name="author" content="Mattia Larentis, Emanuele Marchi and Peter Stein"><title>Bootstrap Switch · Turn checkboxes and radio buttons into toggle switches</title><link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet"><link href="css/highlight.css" rel="stylesheet"><link href="https://unpkg.com/bootstrap-switch/dist/css/bootstrap3/bootstrap-switch.css" rel="stylesheet"><link href="http://getbootstrap.com/assets/css/docs.min.css" rel="stylesheet"><link href="css/main.css" rel="stylesheet"></head><body><a href="https://github.com/nostalgiaz/bootstrap-switch" id="github"><img src="https://s3.amazonaws.com/github/ribbons/forkme_right_gray_6d6d6d.png" alt="Fork me on GitHub"></a><header role="banner" class="navbar navbar-static-top bs-docs-nav"><div class="container"><div class="navbar-header"><button type="button" data-toggle="collapse" data-target="#collapse" class="navbar-toggle"><span class="sr-only">Toggle navigation</span><span class="icon-bar"></span><span class="icon-bar"></span><span class="icon-bar"></span></button><a href="../" class="navbar-brand">Bootstrap Switch</a></div><nav id="collapse" role="navigation" class="collapse navbar-collapse bs-navbar-collapse"><ul class="nav navbar-nav"><li><a href="https://github.com/nostalgiaz/bootstrap-switch/archive/master.zip" data-toggle="dropdown">Download</a></li><li><a href="examples.html">Examples</a></li><li class="dropdown"><a href="#" data-toggle="dropdown">Documentation <span class="caret"></span></a><ul class="dropdown-menu"><li><a href="/options.html">Options</a></li><li><a href="/methods.html">Methods</a></li><li><a href="/events.html">Events</a></li><li role="presentation" class="divider"></li><li><a href="/documentation-2.html">Documentation (v2.0.1)</a></li></ul></li><li><a href="https://github.com/nostalgiaz/bootstrap-switch/issues">Bug reports</a></li></ul></nav></div></header><main id="content" role="main"><div class="bs-docs-masthead"><div class="container"><h1 class="title">Bootstrap Switch</h1><p class="lead">Turn checkboxes &nbsp;<input type="checkbox" checked="checked" data-switch-no-init="data-switch-no-init">&nbsp; and radio buttons &nbsp;<input type="radio" checked="checked" data-switch-no-init="data-switch-no-init">&nbsp; into toggle switches &nbsp;<input type="checkbox" checked="checked"></p><p class="lead"><a href="https://github.com/nostalgiaz/bootstrap-switch/archive/master.zip" class="btn btn-outline-inverse btn-lg">Download Bootstrap Switch</a></p><p class="bs-docs-social"><iframe src="http://ghbtns.com/github-btn.html?user=nostalgiaz&amp;repo=bootstrap-switch&amp;type=watch&amp;count=true&amp;size=large" allowtransparency="true" frameborder="0" scrolling="0" width="184" height="30"></iframe><iframe src="http://ghbtns.com/github-btn.html?user=nostalgiaz&amp;repo=bootstrap-switch&amp;type=fork&amp;count=true&amp;size=large" allowtransparency="true" frameborder="0" scrolling="0" width="144" height="30"></iframe></p><br><p class="version">Currently v3.3.3 · Compatible with Bootstrap 2 and 3</p></div></div><div class="container"><h2 class="page-header">Getting Started</h2><p>Include the dependencies: jQuery, Bootstrap and Bootstrap Switch CSS + Javascript.</p><pre><code>[...]
+<!DOCTYPE html><html lang="en"><head><meta charset="utf-8"><meta http-equiv="x-ua-Compatible" content="ie=edge"><meta name="viewport" content="width=device-width, initial-scale=1.0"><meta name="description" content="Turn checkboxes and radio buttons into toggle switches."><meta name="author" content="Mattia Larentis, Emanuele Marchi and Peter Stein"><title>Bootstrap Switch · Turn checkboxes and radio buttons into toggle switches</title><link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet"><link href="css/highlight.css" rel="stylesheet"><link href="https://unpkg.com/bootstrap-switch/dist/css/bootstrap3/bootstrap-switch.css" rel="stylesheet"><link href="http://getbootstrap.com/assets/css/docs.min.css" rel="stylesheet"><link href="css/main.css" rel="stylesheet"></head><body><a href="https://github.com/nostalgiaz/bootstrap-switch" id="github"><img src="https://s3.amazonaws.com/github/ribbons/forkme_right_gray_6d6d6d.png" alt="Fork me on GitHub"></a><header role="banner" class="navbar navbar-static-top bs-docs-nav"><div class="container"><div class="navbar-header"><button type="button" data-toggle="collapse" data-target="#collapse" class="navbar-toggle"><span class="sr-only">Toggle navigation</span><span class="icon-bar"></span><span class="icon-bar"></span><span class="icon-bar"></span></button><a href="../" class="navbar-brand">Bootstrap Switch</a></div><nav id="collapse" role="navigation" class="collapse navbar-collapse bs-navbar-collapse"><ul class="nav navbar-nav"><li><a href="https://github.com/nostalgiaz/bootstrap-switch/archive/master.zip" data-toggle="dropdown">Download</a></li><li><a href="examples.html">Examples</a></li><li class="dropdown"><a href="#" data-toggle="dropdown">Documentation <span class="caret"></span></a><ul class="dropdown-menu"><li><a href="/options.html">Options</a></li><li><a href="/methods.html">Methods</a></li><li><a href="/events.html">Events</a></li><li role="presentation" class="divider"></li><li><a href="/documentation-2.html">Documentation (v2.0.1)</a></li></ul></li><li><a href="https://github.com/nostalgiaz/bootstrap-switch/issues">Bug reports</a></li></ul></nav></div></header><main id="content" role="main"><div class="bs-docs-masthead"><div class="container"><h1 class="title">Bootstrap Switch</h1><p class="lead">Turn checkboxes &nbsp;<input type="checkbox" checked="checked" data-switch-no-init="data-switch-no-init">&nbsp; and radio buttons &nbsp;<input type="radio" checked="checked" data-switch-no-init="data-switch-no-init">&nbsp; into toggle switches &nbsp;<input type="checkbox" checked="checked"></p><p class="lead"><a href="https://github.com/nostalgiaz/bootstrap-switch/archive/master.zip" class="btn btn-outline-inverse btn-lg">Download Bootstrap Switch</a></p><p class="bs-docs-social"><iframe src="http://ghbtns.com/github-btn.html?user=nostalgiaz&amp;repo=bootstrap-switch&amp;type=watch&amp;count=true&amp;size=large" allowtransparency="true" frameborder="0" scrolling="0" width="184" height="30"></iframe><iframe src="http://ghbtns.com/github-btn.html?user=nostalgiaz&amp;repo=bootstrap-switch&amp;type=fork&amp;count=true&amp;size=large" allowtransparency="true" frameborder="0" scrolling="0" width="144" height="30"></iframe></p><br><p class="version">Currently v4.0.0-alpha.1 · Compatible with Bootstrap 4</p></div></div><div class="container"><h2 class="page-header">Getting Started</h2><p>Include the dependencies: jQuery, Bootstrap and Bootstrap Switch CSS + Javascript.</p><pre><code>[...]
 &lt;link href="bootstrap.css" rel="stylesheet"&gt;
 &lt;link href="bootstrap-switch.css" rel="stylesheet"&gt;
 &lt;script src="jquery.js"&gt;&lt;/script&gt;
diff --git a/package.json b/package.json
index 98cfd658..69aa83c3 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
   "name": "bootstrap-switch",
   "description": "Turn checkboxes and radio buttons into toggle switches.",
-  "version": "3.3.3",
+  "version": "4.0.0-alpha.1",
   "keywords": [
     "bootstrap",
     "switch",
@@ -16,8 +16,9 @@
   ],
   "main": "dist/js/bootstrap-switch.js",
   "peerDependencies": {
-    "bootstrap": "^3.1.1",
-    "jquery": "^1.9.0"
+    "bootstrap": ">=4",
+    "jquery": ">=1.9.0",
+    "tether": "^1.4.0"
   },
   "repository": {
     "type": "git",
@@ -45,6 +46,7 @@
     "karma-phantomjs-launcher": "^1.0.2",
     "less": "^2.7.2",
     "less-plugin-clean-css": "^1.5.0",
+    "node-sass": "^4.5.0",
     "npm-run-all": "^4.0.1",
     "standard": "^8.6.0",
     "wintersmith": "^2.3.6"
@@ -58,10 +60,10 @@
     "js:build:banner": "headr dist/js/bootstrap-switch.js -o dist/js/bootstrap-switch.js --version --homepage --author --license && headr dist/js/bootstrap-switch.min.js -o dist/js/bootstrap-switch.min.js --version --homepage --author --license",
     "js:build": "npm-run-all js:build:dir -p js:build:base js:build:min -s js:build:banner",
     "js": "run-s js:lint js:test js:build",
-    "css:build:base": "lessc src/less/bootstrap2/build.less dist/css/bootstrap2/bootstrap-switch.css && lessc src/less/bootstrap3/build.less dist/css/bootstrap3/bootstrap-switch.css",
-    "css:build:min": "lessc --clean-css='--advanced' src/less/bootstrap2/build.less dist/css/bootstrap2/bootstrap-switch.min.css && lessc --clean-css='--advanced' src/less/bootstrap3/build.less dist/css/bootstrap3/bootstrap-switch.min.css",
-    "css:build:banner": "headr dist/css/bootstrap2/bootstrap-switch.css -o dist/css/bootstrap2/bootstrap-switch.css --version --homepage --author --license && headr dist/css/bootstrap2/bootstrap-switch.min.css -o dist/css/bootstrap2/bootstrap-switch.min.css --version --homepage --author --license && headr dist/css/bootstrap3/bootstrap-switch.css -o dist/css/bootstrap3/bootstrap-switch.css --version --homepage --author --license && headr dist/css/bootstrap3/bootstrap-switch.min.css -o dist/css/bootstrap3/bootstrap-switch.min.css --version --homepage --author --license",
-    "css:build": "npm-run-all css:build:base css:build:min -p css:build:banner",
+    "css:build:base": "node-sass src/scss/build.scss dist/css/bootstrap-switch.css",
+    "css:build:min": "node-sass --output-style=compressed src/scss/build.scss dist/css/bootstrap-switch.min.css",
+    "css:build:banner": "headr dist/css/bootstrap-switch.css -o dist/css/bootstrap-switch.css --version --homepage --author --license && headr dist/css/bootstrap-switch.min.css -o dist/css/bootstrap-switch.min.css --version --homepage --author --license",
+    "css:build": "npm-run-all -p css:build:base css:build:min -s css:build:banner",
     "css": "run-p css:build",
     "clean": "rm -rf dist",
     "lint": "run-p js:lint",
diff --git a/src/docs/index.jade b/src/docs/index.jade
index 18249f0f..23320828 100644
--- a/src/docs/index.jade
+++ b/src/docs/index.jade
@@ -17,7 +17,7 @@
       iframe(src='http://ghbtns.com/github-btn.html?user=nostalgiaz&repo=bootstrap-switch&type=fork&count=true&size=large', allowtransparency='true', frameborder='0', scrolling='0', width='144', height='30')
     br
     p.version
-      | Currently v3.3.3 · Compatible with Bootstrap 2 and 3
+      | Currently v4.0.0-alpha.1 · Compatible with Bootstrap 4
 
 .container
   h2.page-header Getting Started
diff --git a/src/js/bootstrap-switch.js b/src/js/bootstrap-switch.js
index ff47f995..6598c299 100644
--- a/src/js/bootstrap-switch.js
+++ b/src/js/bootstrap-switch.js
@@ -601,7 +601,7 @@
     inverse: false,
     radioAllOff: false,
     onColor: 'primary',
-    offColor: 'default',
+    offColor: 'secondary',
     onText: 'ON',
     offText: 'OFF',
     labelText: '&nbsp',
diff --git a/src/less/bootstrap2/bootstrap-switch.less b/src/less/bootstrap2/bootstrap-switch.less
deleted file mode 100644
index 360f414e..00000000
--- a/src/less/bootstrap2/bootstrap-switch.less
+++ /dev/null
@@ -1,193 +0,0 @@
-@bootstrap-switch-base: bootstrap-switch;
-
-.@{bootstrap-switch-base} {
-  display: inline-block;
-  direction: ltr;
-  cursor: pointer;
-  .border-radius(5px);
-  border: 1px solid;
-  border-color: rgba(0, 0, 0, 0.1) rgba(0, 0, 0, 0.1) rgba(0, 0, 0, 0.25);
-  position: relative;
-  text-align: left;
-  overflow: hidden;
-  line-height: 8px;
-  z-index: 0;
-  .user-select(none);
-  vertical-align: middle;
-  .transition(~"border-color ease-in-out .15s, box-shadow ease-in-out .15s");
-
-  .@{bootstrap-switch-base}-container {
-    display: inline-block;
-    top: 0;
-    .border-radius(4px);
-    .translate3d(0, 0, 0);
-  }
-
-  .@{bootstrap-switch-base}-handle-on,
-  .@{bootstrap-switch-base}-handle-off,
-  .@{bootstrap-switch-base}-label {
-    .box-sizing(border-box);
-    cursor: pointer;
-    display: inline-block !important;
-    height: 100%;
-    padding-top: 4px;
-    padding-bottom: 4px;
-    padding-left: 8px;
-    padding-right: 8px;
-    font-size: 14px;
-    line-height: 20px;
-  }
-
-  .@{bootstrap-switch-base}-handle-on,
-  .@{bootstrap-switch-base}-handle-off {
-    text-align: center;
-    z-index: 1;
-
-    &.@{bootstrap-switch-base}-primary {
-      .buttonBackground(@btnPrimaryBackgroundHighlight, @btnPrimaryBackground);
-    }
-
-    &.@{bootstrap-switch-base}-info {
-      .buttonBackground(@btnInfoBackgroundHighlight, @btnInfoBackground);
-    }
-
-    &.@{bootstrap-switch-base}-success {
-      .buttonBackground(@btnSuccessBackgroundHighlight, @btnSuccessBackground);
-    }
-
-    &.@{bootstrap-switch-base}-warning {
-      .buttonBackground(@btnWarningBackgroundHighlight, @btnWarningBackground);
-    }
-
-    &.@{bootstrap-switch-base}-danger {
-      .buttonBackground(@btnDangerBackgroundHighlight, @btnDangerBackground);
-    }
-
-    &.@{bootstrap-switch-base}-default {
-      .buttonBackground(@btnBackgroundHighlight, @btnBackground, @grayDark, 0 1px 1px rgba(255,255,255,.75));
-    }
-  }
-
-  .@{bootstrap-switch-base}-label {
-    text-align: center;
-    margin-top: -1px;
-    margin-bottom: -1px;
-    z-index: 100;
-    border-left: 1px solid @btnBorder;
-    border-right: 1px solid @btnBorder;
-    .buttonBackground(@btnBackground, @btnBackgroundHighlight, @grayDark);
-  }
-
-  .@{bootstrap-switch-base}-handle-on {
-    .border-left-radius(4px);
-  }
-
-  .@{bootstrap-switch-base}-handle-off {
-    .border-right-radius(4px);
-  }
-
-  input[type='radio'],
-  input[type='checkbox'] {
-    position: absolute !important;
-    top: 0;
-    left: 0;
-    .opacity(0);
-    z-index: -1;
-
-    &.form-control {
-      height: auto;
-    }
-  }
-
-  &.@{bootstrap-switch-base}-mini {
-    min-width: 71px;
-
-    .@{bootstrap-switch-base}-handle-on,
-    .@{bootstrap-switch-base}-handle-off,
-    .@{bootstrap-switch-base}-label {
-      padding: 3px 6px;
-      font-size: 10px;
-      line-height: 9px;
-    }
-  }
-
-  &.@{bootstrap-switch-base}-small {
-    min-width: 79px;
-
-    .@{bootstrap-switch-base}-handle-on,
-    .@{bootstrap-switch-base}-handle-off,
-    .@{bootstrap-switch-base}-label {
-      padding: 3px 6px;
-      font-size: 12px;
-      line-height: 18px;
-    }
-  }
-
-  &.@{bootstrap-switch-base}-large {
-    min-width: 120px;
-
-    .@{bootstrap-switch-base}-handle-on,
-    .@{bootstrap-switch-base}-handle-off,
-    .@{bootstrap-switch-base}-label {
-      padding: 9px 12px;
-      font-size: 16px;
-      line-height: normal;
-    }
-  }
-
-  &.@{bootstrap-switch-base}-disabled,
-  &.@{bootstrap-switch-base}-readonly,
-  &.@{bootstrap-switch-base}-indeterminate {
-    cursor: default !important;
-
-    .@{bootstrap-switch-base}-handle-on,
-    .@{bootstrap-switch-base}-handle-off,
-    .@{bootstrap-switch-base}-label {
-      .opacity(50);
-      cursor: default !important;
-    }
-  }
-
-  &.@{bootstrap-switch-base}-animate {
-
-    .@{bootstrap-switch-base}-container {
-      .transition(margin-left .5s);
-    }
-  }
-
-  &.@{bootstrap-switch-base}-inverse {
-
-    .@{bootstrap-switch-base}-handle-on {
-      .border-left-radius(0);
-      .border-right-radius(4px);
-    }
-
-    .@{bootstrap-switch-base}-handle-off {
-      .border-right-radius(0);
-      .border-left-radius(4px);
-    }
-  }
-
-  &.@{bootstrap-switch-base}-focused {
-    border-color: rgba(82, 168, 236, .8);
-    outline: 0;
-    outline: thin dotted \9;
-    .box-shadow(~"inset 0 1px 1px rgba(0,0,0,.075), 0 0 8px rgba(82, 168, 236, .6)");
-  }
-
-  &.@{bootstrap-switch-base}-on,
-  &.@{bootstrap-switch-base}-inverse.@{bootstrap-switch-base}-off {
-
-    .@{bootstrap-switch-base}-label {
-      .border-right-radius(4px);
-    }
-  }
-
-  &.@{bootstrap-switch-base}-off,
-  &.@{bootstrap-switch-base}-inverse.@{bootstrap-switch-base}-on {
-
-    .@{bootstrap-switch-base}-label {
-      .border-left-radius(4px);
-    }
-  }
-}
diff --git a/src/less/bootstrap2/mixins.less b/src/less/bootstrap2/mixins.less
deleted file mode 100644
index 62433858..00000000
--- a/src/less/bootstrap2/mixins.less
+++ /dev/null
@@ -1,702 +0,0 @@
-//
-// Mixins
-// --------------------------------------------------
-
-
-// UTILITY MIXINS
-// --------------------------------------------------
-
-// Clearfix
-// --------
-// For clearing floats like a boss h5bp.com/q
-.clearfix {
-  *zoom: 1;
-  &:before,
-  &:after {
-    display: table;
-    content: "";
-    // Fixes Opera/contenteditable bug:
-    // http://nicolasgallagher.com/micro-clearfix-hack/#comment-36952
-    line-height: 0;
-  }
-  &:after {
-    clear: both;
-  }
-}
-
-// Webkit-style focus
-// ------------------
-.tab-focus() {
-  // Default
-  outline: thin dotted #333;
-  // Webkit
-  outline: 5px auto -webkit-focus-ring-color;
-  outline-offset: -2px;
-}
-
-// Center-align a block level element
-// ----------------------------------
-.center-block() {
-  display: block;
-  margin-left: auto;
-  margin-right: auto;
-}
-
-// IE7 inline-block
-// ----------------
-.ie7-inline-block() {
-  *display: inline; /* IE7 inline-block hack */
-  *zoom: 1;
-}
-
-// IE7 likes to collapse whitespace on either side of the inline-block elements.
-// Ems because we're attempting to match the width of a space character. Left
-// version is for form buttons, which typically come after other elements, and
-// right version is for icons, which come before. Applying both is ok, but it will
-// mean that space between those elements will be .6em (~2 space characters) in IE7,
-// instead of the 1 space in other browsers.
-.ie7-restore-left-whitespace() {
-  *margin-left: .3em;
-
-  &:first-child {
-    *margin-left: 0;
-  }
-}
-
-.ie7-restore-right-whitespace() {
-  *margin-right: .3em;
-}
-
-// Sizing shortcuts
-// -------------------------
-.size(@height, @width) {
-  width: @width;
-  height: @height;
-}
-.square(@size) {
-  .size(@size, @size);
-}
-
-// Placeholder text
-// -------------------------
-.placeholder(@color: @placeholderText) {
-  &:-moz-placeholder {
-    color: @color;
-  }
-  &:-ms-input-placeholder {
-    color: @color;
-  }
-  &::-webkit-input-placeholder {
-    color: @color;
-  }
-}
-
-// Text overflow
-// -------------------------
-// Requires inline-block or block for proper styling
-.text-overflow() {
-  overflow: hidden;
-  text-overflow: ellipsis;
-  white-space: nowrap;
-}
-
-// CSS image replacement
-// -------------------------
-// Source: https://github.com/h5bp/html5-boilerplate/commit/aa0396eae757
-.hide-text {
-  font: 0/0 a;
-  color: transparent;
-  text-shadow: none;
-  background-color: transparent;
-  border: 0;
-}
-
-
-// FONTS
-// --------------------------------------------------
-
-#font {
-  #family {
-    .serif() {
-      font-family: @serifFontFamily;
-    }
-    .sans-serif() {
-      font-family: @sansFontFamily;
-    }
-    .monospace() {
-      font-family: @monoFontFamily;
-    }
-  }
-  .shorthand(@size: @baseFontSize, @weight: normal, @lineHeight: @baseLineHeight) {
-    font-size: @size;
-    font-weight: @weight;
-    line-height: @lineHeight;
-  }
-  .serif(@size: @baseFontSize, @weight: normal, @lineHeight: @baseLineHeight) {
-    #font > #family > .serif;
-    #font > .shorthand(@size, @weight, @lineHeight);
-  }
-  .sans-serif(@size: @baseFontSize, @weight: normal, @lineHeight: @baseLineHeight) {
-    #font > #family > .sans-serif;
-    #font > .shorthand(@size, @weight, @lineHeight);
-  }
-  .monospace(@size: @baseFontSize, @weight: normal, @lineHeight: @baseLineHeight) {
-    #font > #family > .monospace;
-    #font > .shorthand(@size, @weight, @lineHeight);
-  }
-}
-
-
-// FORMS
-// --------------------------------------------------
-
-// Block level inputs
-.input-block-level {
-  display: block;
-  width: 100%;
-  min-height: @inputHeight; // Make inputs at least the height of their button counterpart (base line-height + padding + border)
-  .box-sizing(border-box); // Makes inputs behave like true block-level elements
-}
-
-
-
-// Mixin for form field states
-.formFieldState(@textColor: #555, @borderColor: #ccc, @backgroundColor: #f5f5f5) {
-  // Set the text color
-  .control-label,
-  .help-block,
-  .help-inline {
-    color: @textColor;
-  }
-  // Style inputs accordingly
-  .checkbox,
-  .radio,
-  input,
-  select,
-  textarea {
-    color: @textColor;
-  }
-  input,
-  select,
-  textarea {
-    border-color: @borderColor;
-    .box-shadow(inset 0 1px 1px rgba(0,0,0,.075)); // Redeclare so transitions work
-    &:focus {
-      border-color: darken(@borderColor, 10%);
-      @shadow: inset 0 1px 1px rgba(0,0,0,.075), 0 0 6px lighten(@borderColor, 20%);
-      .box-shadow(@shadow);
-    }
-  }
-  // Give a small background color for input-prepend/-append
-  .input-prepend .add-on,
-  .input-append .add-on {
-    color: @textColor;
-    background-color: @backgroundColor;
-    border-color: @textColor;
-  }
-}
-
-
-
-// CSS3 PROPERTIES
-// --------------------------------------------------
-
-// Border Radius
-.border-radius(@radius) {
-  -webkit-border-radius: @radius;
-     -moz-border-radius: @radius;
-          border-radius: @radius;
-}
-
-// Single Corner Border Radius
-.border-top-left-radius(@radius) {
-  -webkit-border-top-left-radius: @radius;
-      -moz-border-radius-topleft: @radius;
-          border-top-left-radius: @radius;
-}
-.border-top-right-radius(@radius) {
-  -webkit-border-top-right-radius: @radius;
-      -moz-border-radius-topright: @radius;
-          border-top-right-radius: @radius;
-}
-.border-bottom-right-radius(@radius) {
-  -webkit-border-bottom-right-radius: @radius;
-      -moz-border-radius-bottomright: @radius;
-          border-bottom-right-radius: @radius;
-}
-.border-bottom-left-radius(@radius) {
-  -webkit-border-bottom-left-radius: @radius;
-      -moz-border-radius-bottomleft: @radius;
-          border-bottom-left-radius: @radius;
-}
-
-// Single Side Border Radius
-.border-top-radius(@radius) {
-  .border-top-right-radius(@radius);
-  .border-top-left-radius(@radius);
-}
-.border-right-radius(@radius) {
-  .border-top-right-radius(@radius);
-  .border-bottom-right-radius(@radius);
-}
-.border-bottom-radius(@radius) {
-  .border-bottom-right-radius(@radius);
-  .border-bottom-left-radius(@radius);
-}
-.border-left-radius(@radius) {
-  .border-top-left-radius(@radius);
-  .border-bottom-left-radius(@radius);
-}
-
-// Drop shadows
-.box-shadow(@shadow) {
-  -webkit-box-shadow: @shadow;
-     -moz-box-shadow: @shadow;
-          box-shadow: @shadow;
-}
-
-// Transitions
-.transition(@transition) {
-  -webkit-transition: @transition;
-     -moz-transition: @transition;
-       -o-transition: @transition;
-          transition: @transition;
-}
-.transition-delay(@transition-delay) {
-  -webkit-transition-delay: @transition-delay;
-     -moz-transition-delay: @transition-delay;
-       -o-transition-delay: @transition-delay;
-          transition-delay: @transition-delay;
-}
-.transition-duration(@transition-duration) {
-  -webkit-transition-duration: @transition-duration;
-     -moz-transition-duration: @transition-duration;
-       -o-transition-duration: @transition-duration;
-          transition-duration: @transition-duration;
-}
-
-// Transformations
-.rotate(@degrees) {
-  -webkit-transform: rotate(@degrees);
-     -moz-transform: rotate(@degrees);
-      -ms-transform: rotate(@degrees);
-       -o-transform: rotate(@degrees);
-          transform: rotate(@degrees);
-}
-.scale(@ratio) {
-  -webkit-transform: scale(@ratio);
-     -moz-transform: scale(@ratio);
-      -ms-transform: scale(@ratio);
-       -o-transform: scale(@ratio);
-          transform: scale(@ratio);
-}
-.translate(@x, @y) {
-  -webkit-transform: translate(@x, @y);
-     -moz-transform: translate(@x, @y);
-      -ms-transform: translate(@x, @y);
-       -o-transform: translate(@x, @y);
-          transform: translate(@x, @y);
-}
-.skew(@x, @y) {
-  -webkit-transform: skew(@x, @y);
-     -moz-transform: skew(@x, @y);
-      -ms-transform: skewX(@x) skewY(@y); // See https://github.com/twbs/bootstrap/issues/4885
-       -o-transform: skew(@x, @y);
-          transform: skew(@x, @y);
-  -webkit-backface-visibility: hidden; // See https://github.com/twbs/bootstrap/issues/5319
-}
-.translate3d(@x, @y, @z) {
-  -webkit-transform: translate3d(@x, @y, @z);
-     -moz-transform: translate3d(@x, @y, @z);
-       -o-transform: translate3d(@x, @y, @z);
-          transform: translate3d(@x, @y, @z);
-}
-
-// Backface visibility
-// Prevent browsers from flickering when using CSS 3D transforms.
-// Default value is `visible`, but can be changed to `hidden
-// See git pull https://github.com/dannykeane/bootstrap.git backface-visibility for examples
-.backface-visibility(@visibility){
-  -webkit-backface-visibility: @visibility;
-     -moz-backface-visibility: @visibility;
-          backface-visibility: @visibility;
-}
-
-// Background clipping
-// Heads up: FF 3.6 and under need "padding" instead of "padding-box"
-.background-clip(@clip) {
-  -webkit-background-clip: @clip;
-     -moz-background-clip: @clip;
-          background-clip: @clip;
-}
-
-// Background sizing
-.background-size(@size) {
-  -webkit-background-size: @size;
-     -moz-background-size: @size;
-       -o-background-size: @size;
-          background-size: @size;
-}
-
-
-// Box sizing
-.box-sizing(@boxmodel) {
-  -webkit-box-sizing: @boxmodel;
-     -moz-box-sizing: @boxmodel;
-          box-sizing: @boxmodel;
-}
-
-// User select
-// For selecting text on the page
-.user-select(@select) {
-  -webkit-user-select: @select;
-     -moz-user-select: @select;
-      -ms-user-select: @select;
-       -o-user-select: @select;
-          user-select: @select;
-}
-
-// Resize anything
-.resizable(@direction) {
-  resize: @direction; // Options: horizontal, vertical, both
-  overflow: auto; // Safari fix
-}
-
-// CSS3 Content Columns
-.content-columns(@columnCount, @columnGap: @gridGutterWidth) {
-  -webkit-column-count: @columnCount;
-     -moz-column-count: @columnCount;
-          column-count: @columnCount;
-  -webkit-column-gap: @columnGap;
-     -moz-column-gap: @columnGap;
-          column-gap: @columnGap;
-}
-
-// Optional hyphenation
-.hyphens(@mode: auto) {
-  word-wrap: break-word;
-  -webkit-hyphens: @mode;
-     -moz-hyphens: @mode;
-      -ms-hyphens: @mode;
-       -o-hyphens: @mode;
-          hyphens: @mode;
-}
-
-// Opacity
-.opacity(@opacity) {
-  opacity: @opacity / 100;
-  filter: ~"alpha(opacity=@{opacity})";
-}
-
-
-
-// BACKGROUNDS
-// --------------------------------------------------
-
-// Add an alphatransparency value to any background or border color (via Elyse Holladay)
-#translucent {
-  .background(@color: @white, @alpha: 1) {
-    background-color: hsla(hue(@color), saturation(@color), lightness(@color), @alpha);
-  }
-  .border(@color: @white, @alpha: 1) {
-    border-color: hsla(hue(@color), saturation(@color), lightness(@color), @alpha);
-    .background-clip(padding-box);
-  }
-}
-
-// Gradient Bar Colors for buttons and alerts
-.gradientBar(@primaryColor, @secondaryColor, @textColor: #fff, @textShadow: 0 -1px 0 rgba(0,0,0,.25)) {
-  color: @textColor;
-  text-shadow: @textShadow;
-  #gradient > .vertical(@primaryColor, @secondaryColor);
-  border-color: @secondaryColor @secondaryColor darken(@secondaryColor, 15%);
-  border-color: rgba(0,0,0,.1) rgba(0,0,0,.1) fadein(rgba(0,0,0,.1), 15%);
-}
-
-// Gradients
-#gradient {
-  .horizontal(@startColor: #555, @endColor: #333) {
-    background-color: @endColor;
-    background-image: -moz-linear-gradient(left, @startColor, @endColor); // FF 3.6+
-    background-image: -webkit-gradient(linear, 0 0, 100% 0, from(@startColor), to(@endColor)); // Safari 4+, Chrome 2+
-    background-image: -webkit-linear-gradient(left, @startColor, @endColor); // Safari 5.1+, Chrome 10+
-    background-image: -o-linear-gradient(left, @startColor, @endColor); // Opera 11.10
-    background-image: linear-gradient(to right, @startColor, @endColor); // Standard, IE10
-    background-repeat: repeat-x;
-    filter: e(%("progid:DXImageTransform.Microsoft.gradient(startColorstr='%d', endColorstr='%d', GradientType=1)",argb(@startColor),argb(@endColor))); // IE9 and down
-  }
-  .vertical(@startColor: #555, @endColor: #333) {
-    background-color: mix(@startColor, @endColor, 60%);
-    background-image: -moz-linear-gradient(top, @startColor, @endColor); // FF 3.6+
-    background-image: -webkit-gradient(linear, 0 0, 0 100%, from(@startColor), to(@endColor)); // Safari 4+, Chrome 2+
-    background-image: -webkit-linear-gradient(top, @startColor, @endColor); // Safari 5.1+, Chrome 10+
-    background-image: -o-linear-gradient(top, @startColor, @endColor); // Opera 11.10
-    background-image: linear-gradient(to bottom, @startColor, @endColor); // Standard, IE10
-    background-repeat: repeat-x;
-    filter: e(%("progid:DXImageTransform.Microsoft.gradient(startColorstr='%d', endColorstr='%d', GradientType=0)",argb(@startColor),argb(@endColor))); // IE9 and down
-  }
-  .directional(@startColor: #555, @endColor: #333, @deg: 45deg) {
-    background-color: @endColor;
-    background-repeat: repeat-x;
-    background-image: -moz-linear-gradient(@deg, @startColor, @endColor); // FF 3.6+
-    background-image: -webkit-linear-gradient(@deg, @startColor, @endColor); // Safari 5.1+, Chrome 10+
-    background-image: -o-linear-gradient(@deg, @startColor, @endColor); // Opera 11.10
-    background-image: linear-gradient(@deg, @startColor, @endColor); // Standard, IE10
-  }
-  .horizontal-three-colors(@startColor: #00b3ee, @midColor: #7a43b6, @colorStop: 50%, @endColor: #c3325f) {
-    background-color: mix(@midColor, @endColor, 80%);
-    background-image: -webkit-gradient(left, linear, 0 0, 0 100%, from(@startColor), color-stop(@colorStop, @midColor), to(@endColor));
-    background-image: -webkit-linear-gradient(left, @startColor, @midColor @colorStop, @endColor);
-    background-image: -moz-linear-gradient(left, @startColor, @midColor @colorStop, @endColor);
-    background-image: -o-linear-gradient(left, @startColor, @midColor @colorStop, @endColor);
-    background-image: linear-gradient(to right, @startColor, @midColor @colorStop, @endColor);
-    background-repeat: no-repeat;
-    filter: e(%("progid:DXImageTransform.Microsoft.gradient(startColorstr='%d', endColorstr='%d', GradientType=0)",argb(@startColor),argb(@endColor))); // IE9 and down, gets no color-stop at all for proper fallback
-  }
-
-  .vertical-three-colors(@startColor: #00b3ee, @midColor: #7a43b6, @colorStop: 50%, @endColor: #c3325f) {
-    background-color: mix(@midColor, @endColor, 80%);
-    background-image: -webkit-gradient(linear, 0 0, 0 100%, from(@startColor), color-stop(@colorStop, @midColor), to(@endColor));
-    background-image: -webkit-linear-gradient(@startColor, @midColor @colorStop, @endColor);
-    background-image: -moz-linear-gradient(top, @startColor, @midColor @colorStop, @endColor);
-    background-image: -o-linear-gradient(@startColor, @midColor @colorStop, @endColor);
-    background-image: linear-gradient(@startColor, @midColor @colorStop, @endColor);
-    background-repeat: no-repeat;
-    filter: e(%("progid:DXImageTransform.Microsoft.gradient(startColorstr='%d', endColorstr='%d', GradientType=0)",argb(@startColor),argb(@endColor))); // IE9 and down, gets no color-stop at all for proper fallback
-  }
-  .radial(@innerColor: #555, @outerColor: #333) {
-    background-color: @outerColor;
-    background-image: -webkit-gradient(radial, center center, 0, center center, 460, from(@innerColor), to(@outerColor));
-    background-image: -webkit-radial-gradient(circle, @innerColor, @outerColor);
-    background-image: -moz-radial-gradient(circle, @innerColor, @outerColor);
-    background-image: -o-radial-gradient(circle, @innerColor, @outerColor);
-    background-repeat: no-repeat;
-  }
-  .striped(@color: #555, @angle: 45deg) {
-    background-color: @color;
-    background-image: -webkit-gradient(linear, 0 100%, 100% 0, color-stop(.25, rgba(255,255,255,.15)), color-stop(.25, transparent), color-stop(.5, transparent), color-stop(.5, rgba(255,255,255,.15)), color-stop(.75, rgba(255,255,255,.15)), color-stop(.75, transparent), to(transparent));
-    background-image: -webkit-linear-gradient(@angle, rgba(255,255,255,.15) 25%, transparent 25%, transparent 50%, rgba(255,255,255,.15) 50%, rgba(255,255,255,.15) 75%, transparent 75%, transparent);
-    background-image: -moz-linear-gradient(@angle, rgba(255,255,255,.15) 25%, transparent 25%, transparent 50%, rgba(255,255,255,.15) 50%, rgba(255,255,255,.15) 75%, transparent 75%, transparent);
-    background-image: -o-linear-gradient(@angle, rgba(255,255,255,.15) 25%, transparent 25%, transparent 50%, rgba(255,255,255,.15) 50%, rgba(255,255,255,.15) 75%, transparent 75%, transparent);
-    background-image: linear-gradient(@angle, rgba(255,255,255,.15) 25%, transparent 25%, transparent 50%, rgba(255,255,255,.15) 50%, rgba(255,255,255,.15) 75%, transparent 75%, transparent);
-  }
-}
-// Reset filters for IE
-.reset-filter() {
-  filter: e(%("progid:DXImageTransform.Microsoft.gradient(enabled = false)"));
-}
-
-
-
-// COMPONENT MIXINS
-// --------------------------------------------------
-
-// Horizontal dividers
-// -------------------------
-// Dividers (basically an hr) within dropdowns and nav lists
-.nav-divider(@top: #e5e5e5, @bottom: @white) {
-  // IE7 needs a set width since we gave a height. Restricting just
-  // to IE7 to keep the 1px left/right space in other browsers.
-  // It is unclear where IE is getting the extra space that we need
-  // to negative-margin away, but so it goes.
-  *width: 100%;
-  height: 1px;
-  margin: ((@baseLineHeight / 2) - 1) 1px; // 8px 1px
-  *margin: -5px 0 5px;
-  overflow: hidden;
-  background-color: @top;
-  border-bottom: 1px solid @bottom;
-}
-
-// Button backgrounds
-// ------------------
-.buttonBackground(@startColor, @endColor, @textColor: #fff, @textShadow: 0 -1px 0 rgba(0,0,0,.25)) {
-  // gradientBar will set the background to a pleasing blend of these, to support IE<=9
-  .gradientBar(@startColor, @endColor, @textColor, @textShadow);
-  *background-color: @endColor; /* Darken IE7 buttons by default so they stand out more given they won't have borders */
-  .reset-filter();
-
-  // in these cases the gradient won't cover the background, so we override
-  &:hover, &:focus, &:active, &.active, &.disabled, &[disabled] {
-    color: @textColor;
-    background-color: @endColor;
-    *background-color: darken(@endColor, 5%);
-  }
-
-  // IE 7 + 8 can't handle box-shadow to show active, so we darken a bit ourselves
-  &:active,
-  &.active {
-    background-color: darken(@endColor, 10%) e("\9");
-  }
-}
-
-// Navbar vertical align
-// -------------------------
-// Vertically center elements in the navbar.
-// Example: an element has a height of 30px, so write out `.navbarVerticalAlign(30px);` to calculate the appropriate top margin.
-.navbarVerticalAlign(@elementHeight) {
-  margin-top: (@navbarHeight - @elementHeight) / 2;
-}
-
-
-
-// Grid System
-// -----------
-
-// Centered container element
-.container-fixed() {
-  margin-right: auto;
-  margin-left: auto;
-  .clearfix();
-}
-
-// Table columns
-.tableColumns(@columnSpan: 1) {
-  float: none; // undo default grid column styles
-  width: ((@gridColumnWidth) * @columnSpan) + (@gridGutterWidth * (@columnSpan - 1)) - 16; // 16 is total padding on left and right of table cells
-  margin-left: 0; // undo default grid column styles
-}
-
-// Make a Grid
-// Use .makeRow and .makeColumn to assign semantic layouts grid system behavior
-.makeRow() {
-  margin-left: @gridGutterWidth * -1;
-  .clearfix();
-}
-.makeColumn(@columns: 1, @offset: 0) {
-  float: left;
-  margin-left: (@gridColumnWidth * @offset) + (@gridGutterWidth * (@offset - 1)) + (@gridGutterWidth * 2);
-  width: (@gridColumnWidth * @columns) + (@gridGutterWidth * (@columns - 1));
-}
-
-// The Grid
-#grid {
-
-  .core (@gridColumnWidth, @gridGutterWidth) {
-
-    .spanX (@index) when (@index > 0) {
-      .span@{index} { .span(@index); }
-      .spanX(@index - 1);
-    }
-    .spanX (0) {}
-
-    .offsetX (@index) when (@index > 0) {
-      .offset@{index} { .offset(@index); }
-      .offsetX(@index - 1);
-    }
-    .offsetX (0) {}
-
-    .offset (@columns) {
-      margin-left: (@gridColumnWidth * @columns) + (@gridGutterWidth * (@columns + 1));
-    }
-
-    .span (@columns) {
-      width: (@gridColumnWidth * @columns) + (@gridGutterWidth * (@columns - 1));
-    }
-
-    .row {
-      margin-left: @gridGutterWidth * -1;
-      .clearfix();
-    }
-
-    [class*="span"] {
-      float: left;
-      min-height: 1px; // prevent collapsing columns
-      margin-left: @gridGutterWidth;
-    }
-
-    // Set the container width, and override it for fixed navbars in media queries
-    .container,
-    .navbar-static-top .container,
-    .navbar-fixed-top .container,
-    .navbar-fixed-bottom .container { .span(@gridColumns); }
-
-    // generate .spanX and .offsetX
-    .spanX (@gridColumns);
-    .offsetX (@gridColumns);
-
-  }
-
-  .fluid (@fluidGridColumnWidth, @fluidGridGutterWidth) {
-
-    .spanX (@index) when (@index > 0) {
-      .span@{index} { .span(@index); }
-      .spanX(@index - 1);
-    }
-    .spanX (0) {}
-
-    .offsetX (@index) when (@index > 0) {
-      .offset@{index} { .offset(@index); }
-      .offset@{index}:first-child { .offsetFirstChild(@index); }
-      .offsetX(@index - 1);
-    }
-    .offsetX (0) {}
-
-    .offset (@columns) {
-      margin-left: (@fluidGridColumnWidth * @columns) + (@fluidGridGutterWidth * (@columns - 1)) + (@fluidGridGutterWidth*2);
-      *margin-left: (@fluidGridColumnWidth * @columns) + (@fluidGridGutterWidth * (@columns - 1)) - (.5 / @gridRowWidth * 100 * 1%) + (@fluidGridGutterWidth*2) - (.5 / @gridRowWidth * 100 * 1%);
-    }
-
-    .offsetFirstChild (@columns) {
-      margin-left: (@fluidGridColumnWidth * @columns) + (@fluidGridGutterWidth * (@columns - 1)) + (@fluidGridGutterWidth);
-      *margin-left: (@fluidGridColumnWidth * @columns) + (@fluidGridGutterWidth * (@columns - 1)) - (.5 / @gridRowWidth * 100 * 1%) + @fluidGridGutterWidth - (.5 / @gridRowWidth * 100 * 1%);
-    }
-
-    .span (@columns) {
-      width: (@fluidGridColumnWidth * @columns) + (@fluidGridGutterWidth * (@columns - 1));
-      *width: (@fluidGridColumnWidth * @columns) + (@fluidGridGutterWidth * (@columns - 1)) - (.5 / @gridRowWidth * 100 * 1%);
-    }
-
-    .row-fluid {
-      width: 100%;
-      .clearfix();
-      [class*="span"] {
-        .input-block-level();
-        float: left;
-        margin-left: @fluidGridGutterWidth;
-        *margin-left: @fluidGridGutterWidth - (.5 / @gridRowWidth * 100 * 1%);
-      }
-      [class*="span"]:first-child {
-        margin-left: 0;
-      }
-
-      // Space grid-sized controls properly if multiple per line
-      .controls-row [class*="span"] + [class*="span"] {
-        margin-left: @fluidGridGutterWidth;
-      }
-
-      // generate .spanX and .offsetX
-      .spanX (@gridColumns);
-      .offsetX (@gridColumns);
-    }
-
-  }
-
-  .input(@gridColumnWidth, @gridGutterWidth) {
-
-    .spanX (@index) when (@index > 0) {
-      input.span@{index}, textarea.span@{index}, .uneditable-input.span@{index} { .span(@index); }
-      .spanX(@index - 1);
-    }
-    .spanX (0) {}
-
-    .span(@columns) {
-      width: ((@gridColumnWidth) * @columns) + (@gridGutterWidth * (@columns - 1)) - 14;
-    }
-
-    input,
-    textarea,
-    .uneditable-input {
-      margin-left: 0; // override margin-left from core grid system
-    }
-
-    // Space grid-sized controls properly if multiple per line
-    .controls-row [class*="span"] + [class*="span"] {
-      margin-left: @gridGutterWidth;
-    }
-
-    // generate .spanX
-    .spanX (@gridColumns);
-
-  }
-}
diff --git a/src/less/bootstrap2/variables.less b/src/less/bootstrap2/variables.less
deleted file mode 100644
index 31c131b1..00000000
--- a/src/less/bootstrap2/variables.less
+++ /dev/null
@@ -1,301 +0,0 @@
-//
-// Variables
-// --------------------------------------------------
-
-
-// Global values
-// --------------------------------------------------
-
-
-// Grays
-// -------------------------
-@black:                 #000;
-@grayDarker:            #222;
-@grayDark:              #333;
-@gray:                  #555;
-@grayLight:             #999;
-@grayLighter:           #eee;
-@white:                 #fff;
-
-
-// Accent colors
-// -------------------------
-@blue:                  #049cdb;
-@blueDark:              #0064cd;
-@green:                 #46a546;
-@red:                   #9d261d;
-@yellow:                #ffc40d;
-@orange:                #f89406;
-@pink:                  #c3325f;
-@purple:                #7a43b6;
-
-
-// Scaffolding
-// -------------------------
-@bodyBackground:        @white;
-@textColor:             @grayDark;
-
-
-// Links
-// -------------------------
-@linkColor:             #08c;
-@linkColorHover:        darken(@linkColor, 15%);
-
-
-// Typography
-// -------------------------
-@sansFontFamily:        "Helvetica Neue", Helvetica, Arial, sans-serif;
-@serifFontFamily:       Georgia, "Times New Roman", Times, serif;
-@monoFontFamily:        Monaco, Menlo, Consolas, "Courier New", monospace;
-
-@baseFontSize:          14px;
-@baseFontFamily:        @sansFontFamily;
-@baseLineHeight:        20px;
-@altFontFamily:         @serifFontFamily;
-
-@headingsFontFamily:    inherit; // empty to use BS default, @baseFontFamily
-@headingsFontWeight:    bold;    // instead of browser default, bold
-@headingsColor:         inherit; // empty to use BS default, @textColor
-
-
-// Component sizing
-// -------------------------
-// Based on 14px font-size and 20px line-height
-
-@fontSizeLarge:         @baseFontSize * 1.25; // ~18px
-@fontSizeSmall:         @baseFontSize * 0.85; // ~12px
-@fontSizeMini:          @baseFontSize * 0.75; // ~11px
-
-@paddingLarge:          11px 19px; // 44px
-@paddingSmall:          2px 10px;  // 26px
-@paddingMini:           0 6px;   // 22px
-
-@baseBorderRadius:      4px;
-@borderRadiusLarge:     6px;
-@borderRadiusSmall:     3px;
-
-
-// Tables
-// -------------------------
-@tableBackground:                   transparent; // overall background-color
-@tableBackgroundAccent:             #f9f9f9; // for striping
-@tableBackgroundHover:              #f5f5f5; // for hover
-@tableBorder:                       #ddd; // table and cell border
-
-// Buttons
-// -------------------------
-@btnBackground:                     @white;
-@btnBackgroundHighlight:            darken(@white, 10%);
-@btnBorder:                         #ccc;
-
-@btnPrimaryBackground:              @linkColor;
-@btnPrimaryBackgroundHighlight:     spin(@btnPrimaryBackground, 20%);
-
-@btnInfoBackground:                 #5bc0de;
-@btnInfoBackgroundHighlight:        #2f96b4;
-
-@btnSuccessBackground:              #62c462;
-@btnSuccessBackgroundHighlight:     #51a351;
-
-@btnWarningBackground:              lighten(@orange, 15%);
-@btnWarningBackgroundHighlight:     @orange;
-
-@btnDangerBackground:               #ee5f5b;
-@btnDangerBackgroundHighlight:      #bd362f;
-
-@btnInverseBackground:              #444;
-@btnInverseBackgroundHighlight:     @grayDarker;
-
-
-// Forms
-// -------------------------
-@inputBackground:               @white;
-@inputBorder:                   #ccc;
-@inputBorderRadius:             @baseBorderRadius;
-@inputDisabledBackground:       @grayLighter;
-@formActionsBackground:         #f5f5f5;
-@inputHeight:                   @baseLineHeight + 10px; // base line-height + 8px vertical padding + 2px top/bottom border
-
-
-// Dropdowns
-// -------------------------
-@dropdownBackground:            @white;
-@dropdownBorder:                rgba(0,0,0,.2);
-@dropdownDividerTop:            #e5e5e5;
-@dropdownDividerBottom:         @white;
-
-@dropdownLinkColor:             @grayDark;
-@dropdownLinkColorHover:        @white;
-@dropdownLinkColorActive:       @white;
-
-@dropdownLinkBackgroundActive:  @linkColor;
-@dropdownLinkBackgroundHover:   @dropdownLinkBackgroundActive;
-
-
-
-// COMPONENT VARIABLES
-// --------------------------------------------------
-
-
-// Z-index master list
-// -------------------------
-// Used for a bird's eye view of components dependent on the z-axis
-// Try to avoid customizing these :)
-@zindexDropdown:          1000;
-@zindexPopover:           1010;
-@zindexTooltip:           1030;
-@zindexFixedNavbar:       1030;
-@zindexModalBackdrop:     1040;
-@zindexModal:             1050;
-
-
-// Sprite icons path
-// -------------------------
-@iconSpritePath:          "../img/glyphicons-halflings.png";
-@iconWhiteSpritePath:     "../img/glyphicons-halflings-white.png";
-
-
-// Input placeholder text color
-// -------------------------
-@placeholderText:         @grayLight;
-
-
-// Hr border color
-// -------------------------
-@hrBorder:                @grayLighter;
-
-
-// Horizontal forms & lists
-// -------------------------
-@horizontalComponentOffset:       180px;
-
-
-// Wells
-// -------------------------
-@wellBackground:                  #f5f5f5;
-
-
-// Navbar
-// -------------------------
-@navbarCollapseWidth:             979px;
-@navbarCollapseDesktopWidth:      @navbarCollapseWidth + 1;
-
-@navbarHeight:                    40px;
-@navbarBackgroundHighlight:       #ffffff;
-@navbarBackground:                darken(@navbarBackgroundHighlight, 5%);
-@navbarBorder:                    darken(@navbarBackground, 12%);
-
-@navbarText:                      #777;
-@navbarLinkColor:                 #777;
-@navbarLinkColorHover:            @grayDark;
-@navbarLinkColorActive:           @gray;
-@navbarLinkBackgroundHover:       transparent;
-@navbarLinkBackgroundActive:      darken(@navbarBackground, 5%);
-
-@navbarBrandColor:                @navbarLinkColor;
-
-// Inverted navbar
-@navbarInverseBackground:                #111111;
-@navbarInverseBackgroundHighlight:       #222222;
-@navbarInverseBorder:                    #252525;
-
-@navbarInverseText:                      @grayLight;
-@navbarInverseLinkColor:                 @grayLight;
-@navbarInverseLinkColorHover:            @white;
-@navbarInverseLinkColorActive:           @navbarInverseLinkColorHover;
-@navbarInverseLinkBackgroundHover:       transparent;
-@navbarInverseLinkBackgroundActive:      @navbarInverseBackground;
-
-@navbarInverseSearchBackground:          lighten(@navbarInverseBackground, 25%);
-@navbarInverseSearchBackgroundFocus:     @white;
-@navbarInverseSearchBorder:              @navbarInverseBackground;
-@navbarInverseSearchPlaceholderColor:    #ccc;
-
-@navbarInverseBrandColor:                @navbarInverseLinkColor;
-
-
-// Pagination
-// -------------------------
-@paginationBackground:                #fff;
-@paginationBorder:                    #ddd;
-@paginationActiveBackground:          #f5f5f5;
-
-
-// Hero unit
-// -------------------------
-@heroUnitBackground:              @grayLighter;
-@heroUnitHeadingColor:            inherit;
-@heroUnitLeadColor:               inherit;
-
-
-// Form states and alerts
-// -------------------------
-@warningText:             #c09853;
-@warningBackground:       #fcf8e3;
-@warningBorder:           darken(spin(@warningBackground, -10), 3%);
-
-@errorText:               #b94a48;
-@errorBackground:         #f2dede;
-@errorBorder:             darken(spin(@errorBackground, -10), 3%);
-
-@successText:             #468847;
-@successBackground:       #dff0d8;
-@successBorder:           darken(spin(@successBackground, -10), 5%);
-
-@infoText:                #3a87ad;
-@infoBackground:          #d9edf7;
-@infoBorder:              darken(spin(@infoBackground, -10), 7%);
-
-
-// Tooltips and popovers
-// -------------------------
-@tooltipColor:            #fff;
-@tooltipBackground:       #000;
-@tooltipArrowWidth:       5px;
-@tooltipArrowColor:       @tooltipBackground;
-
-@popoverBackground:       #fff;
-@popoverArrowWidth:       10px;
-@popoverArrowColor:       #fff;
-@popoverTitleBackground:  darken(@popoverBackground, 3%);
-
-// Special enhancement for popovers
-@popoverArrowOuterWidth:  @popoverArrowWidth + 1;
-@popoverArrowOuterColor:  rgba(0,0,0,.25);
-
-
-
-// GRID
-// --------------------------------------------------
-
-
-// Default 940px grid
-// -------------------------
-@gridColumns:             12;
-@gridColumnWidth:         60px;
-@gridGutterWidth:         20px;
-@gridRowWidth:            (@gridColumns * @gridColumnWidth) + (@gridGutterWidth * (@gridColumns - 1));
-
-// 1200px min
-@gridColumnWidth1200:     70px;
-@gridGutterWidth1200:     30px;
-@gridRowWidth1200:        (@gridColumns * @gridColumnWidth1200) + (@gridGutterWidth1200 * (@gridColumns - 1));
-
-// 768px-979px
-@gridColumnWidth768:      42px;
-@gridGutterWidth768:      20px;
-@gridRowWidth768:         (@gridColumns * @gridColumnWidth768) + (@gridGutterWidth768 * (@gridColumns - 1));
-
-
-// Fluid grid
-// -------------------------
-@fluidGridColumnWidth:    percentage(@gridColumnWidth/@gridRowWidth);
-@fluidGridGutterWidth:    percentage(@gridGutterWidth/@gridRowWidth);
-
-// 1200px min
-@fluidGridColumnWidth1200:     percentage(@gridColumnWidth1200/@gridRowWidth1200);
-@fluidGridGutterWidth1200:     percentage(@gridGutterWidth1200/@gridRowWidth1200);
-
-// 768px-979px
-@fluidGridColumnWidth768:      percentage(@gridColumnWidth768/@gridRowWidth768);
-@fluidGridGutterWidth768:      percentage(@gridGutterWidth768/@gridRowWidth768);
diff --git a/src/less/bootstrap3/bootstrap-switch.less b/src/less/bootstrap3/bootstrap-switch.less
deleted file mode 100644
index 16abd714..00000000
--- a/src/less/bootstrap3/bootstrap-switch.less
+++ /dev/null
@@ -1,190 +0,0 @@
-@bootstrap-switch-base: bootstrap-switch;
-
-.@{bootstrap-switch-base} {
-  display: inline-block;
-  direction: ltr;
-  cursor: pointer;
-  border-radius: @border-radius-base;
-  border: 1px solid;
-  border-color: @btn-default-border;
-  position: relative;
-  text-align: left;
-  overflow: hidden;
-  line-height: 8px;
-  z-index: 0;
-  .user-select(none);
-  vertical-align: middle;
-  .transition(~"border-color ease-in-out .15s, box-shadow ease-in-out .15s");
-
-  .@{bootstrap-switch-base}-container {
-    display: inline-block;
-    top: 0;
-    border-radius: @border-radius-base;
-    .translate3d(0, 0, 0);
-  }
-
-  .@{bootstrap-switch-base}-handle-on,
-  .@{bootstrap-switch-base}-handle-off,
-  .@{bootstrap-switch-base}-label {
-    .box-sizing(border-box);
-    cursor: pointer;
-    display: inline-block !important;
-    height: 100%;
-    padding: @padding-base-vertical @padding-base-horizontal;
-    font-size: @font-size-base;
-    line-height: @line-height-computed;
-  }
-
-  .@{bootstrap-switch-base}-handle-on,
-  .@{bootstrap-switch-base}-handle-off {
-    text-align: center;
-    z-index: 1;
-
-    &.@{bootstrap-switch-base}-primary {
-      color: #fff;
-      background: @btn-primary-bg;
-    }
-
-    &.@{bootstrap-switch-base}-info {
-      color: #fff;
-      background: @btn-info-bg;
-    }
-
-    &.@{bootstrap-switch-base}-success {
-      color: #fff;
-      background: @btn-success-bg;
-    }
-
-    &.@{bootstrap-switch-base}-warning {
-      background: @btn-warning-bg;
-      color: #fff;
-    }
-
-    &.@{bootstrap-switch-base}-danger {
-      color: #fff;
-      background: @btn-danger-bg;
-    }
-
-    &.@{bootstrap-switch-base}-default {
-      color: #000;
-      background: @gray-lighter;
-    }
-  }
-
-  .@{bootstrap-switch-base}-label {
-    text-align: center;
-    margin-top: -1px;
-    margin-bottom: -1px;
-    z-index: 100;
-    color: @btn-default-color;
-    background: @btn-default-bg;
-  }
-
-  .@{bootstrap-switch-base}-handle-on {
-    .border-left-radius(@border-radius-base - 1);
-  }
-
-  .@{bootstrap-switch-base}-handle-off {
-    .border-right-radius(@border-radius-base - 1);
-  }
-
-  input[type='radio'],
-  input[type='checkbox'] {
-    position: absolute !important;
-    top: 0;
-    left: 0;
-    margin: 0;
-    z-index: -1;
-    .opacity(0);
-  }
-
-  &.@{bootstrap-switch-base}-mini {
-
-    .@{bootstrap-switch-base}-handle-on,
-    .@{bootstrap-switch-base}-handle-off,
-    .@{bootstrap-switch-base}-label {
-      padding: @padding-xs-vertical @padding-xs-horizontal;
-      font-size: @font-size-small;
-      line-height: @line-height-small;
-    }
-  }
-
-  &.@{bootstrap-switch-base}-small {
-
-    .@{bootstrap-switch-base}-handle-on,
-    .@{bootstrap-switch-base}-handle-off,
-    .@{bootstrap-switch-base}-label {
-      padding: @padding-small-vertical @padding-small-horizontal;
-      font-size: @font-size-small;
-      line-height: @line-height-small;
-    }
-  }
-
-  &.@{bootstrap-switch-base}-large {
-
-    .@{bootstrap-switch-base}-handle-on,
-    .@{bootstrap-switch-base}-handle-off,
-    .@{bootstrap-switch-base}-label {
-      padding: @padding-base-vertical @padding-large-horizontal;
-      font-size: @font-size-large;
-      line-height: @line-height-large;
-    }
-  }
-
-  &.@{bootstrap-switch-base}-disabled,
-  &.@{bootstrap-switch-base}-readonly,
-  &.@{bootstrap-switch-base}-indeterminate {
-    cursor: default !important;
-
-    .@{bootstrap-switch-base}-handle-on,
-    .@{bootstrap-switch-base}-handle-off,
-    .@{bootstrap-switch-base}-label {
-      .opacity(.5);
-      cursor: default !important;
-    }
-  }
-
-  &.@{bootstrap-switch-base}-animate {
-
-    .@{bootstrap-switch-base}-container {
-      .transition(margin-left .5s);
-    }
-  }
-
-  &.@{bootstrap-switch-base}-inverse {
-
-    .@{bootstrap-switch-base}-handle-on {
-      .border-left-radius(0);
-      .border-right-radius(@border-radius-base - 1);
-    }
-
-    .@{bootstrap-switch-base}-handle-off {
-      .border-right-radius(0);
-      .border-left-radius(@border-radius-base - 1);
-    }
-  }
-
-  &.@{bootstrap-switch-base}-focused {
-    @color-rgba: rgba(red(@input-border-focus), green(@input-border-focus), blue(@input-border-focus), .6);
-    border-color: @input-border-focus;
-    outline: 0;
-    .box-shadow(~"inset 0 1px 1px rgba(0,0,0,.075), 0 0 8px @{color-rgba}");
-  }
-
-  &.@{bootstrap-switch-base}-on,
-  &.@{bootstrap-switch-base}-inverse.@{bootstrap-switch-base}-off {
-
-    .@{bootstrap-switch-base}-label {
-      .border-right-radius(@border-radius-base - 1);
-    }
-  }
-
-  &.@{bootstrap-switch-base}-off,
-  &.@{bootstrap-switch-base}-inverse.@{bootstrap-switch-base}-on {
-
-
-    .@{bootstrap-switch-base}-label {
-      .border-left-radius(@border-radius-base - 1);
-    }
-  }
-}
diff --git a/src/less/bootstrap3/build.less b/src/less/bootstrap3/build.less
deleted file mode 100644
index beda34a1..00000000
--- a/src/less/bootstrap3/build.less
+++ /dev/null
@@ -1,3 +0,0 @@
-@import "variables";
-@import "mixins";
-@import "bootstrap-switch";
\ No newline at end of file
diff --git a/src/less/bootstrap3/mixins.less b/src/less/bootstrap3/mixins.less
deleted file mode 100755
index e6f9fe68..00000000
--- a/src/less/bootstrap3/mixins.less
+++ /dev/null
@@ -1,40 +0,0 @@
-// Mixins
-// --------------------------------------------------
-
-// Utilities
-@import "mixins/hide-text.less";
-@import "mixins/opacity.less";
-@import "mixins/image.less";
-@import "mixins/labels.less";
-@import "mixins/reset-filter.less";
-@import "mixins/resize.less";
-@import "mixins/responsive-visibility.less";
-@import "mixins/size.less";
-@import "mixins/tab-focus.less";
-@import "mixins/reset-text.less";
-@import "mixins/text-emphasis.less";
-@import "mixins/text-overflow.less";
-@import "mixins/vendor-prefixes.less";
-
-// Components
-@import "mixins/alerts.less";
-@import "mixins/buttons.less";
-@import "mixins/panels.less";
-@import "mixins/pagination.less";
-@import "mixins/list-group.less";
-@import "mixins/nav-divider.less";
-@import "mixins/forms.less";
-@import "mixins/progress-bar.less";
-@import "mixins/table-row.less";
-
-// Skins
-@import "mixins/background-variant.less";
-@import "mixins/border-radius.less";
-@import "mixins/gradients.less";
-
-// Layout
-@import "mixins/clearfix.less";
-@import "mixins/center-block.less";
-@import "mixins/nav-vertical-align.less";
-@import "mixins/grid-framework.less";
-@import "mixins/grid.less";
diff --git a/src/less/bootstrap3/mixins/alerts.less b/src/less/bootstrap3/mixins/alerts.less
deleted file mode 100755
index 396196f4..00000000
--- a/src/less/bootstrap3/mixins/alerts.less
+++ /dev/null
@@ -1,14 +0,0 @@
-// Alerts
-
-.alert-variant(@background; @border; @text-color) {
-  background-color: @background;
-  border-color: @border;
-  color: @text-color;
-
-  hr {
-    border-top-color: darken(@border, 5%);
-  }
-  .alert-link {
-    color: darken(@text-color, 10%);
-  }
-}
diff --git a/src/less/bootstrap3/mixins/background-variant.less b/src/less/bootstrap3/mixins/background-variant.less
deleted file mode 100755
index a85c22b7..00000000
--- a/src/less/bootstrap3/mixins/background-variant.less
+++ /dev/null
@@ -1,9 +0,0 @@
-// Contextual backgrounds
-
-.bg-variant(@color) {
-  background-color: @color;
-  a&:hover,
-  a&:focus {
-    background-color: darken(@color, 10%);
-  }
-}
diff --git a/src/less/bootstrap3/mixins/border-radius.less b/src/less/bootstrap3/mixins/border-radius.less
deleted file mode 100755
index ca05dbf4..00000000
--- a/src/less/bootstrap3/mixins/border-radius.less
+++ /dev/null
@@ -1,18 +0,0 @@
-// Single side border-radius
-
-.border-top-radius(@radius) {
-  border-top-right-radius: @radius;
-   border-top-left-radius: @radius;
-}
-.border-right-radius(@radius) {
-  border-bottom-right-radius: @radius;
-     border-top-right-radius: @radius;
-}
-.border-bottom-radius(@radius) {
-  border-bottom-right-radius: @radius;
-   border-bottom-left-radius: @radius;
-}
-.border-left-radius(@radius) {
-  border-bottom-left-radius: @radius;
-     border-top-left-radius: @radius;
-}
diff --git a/src/less/bootstrap3/mixins/buttons.less b/src/less/bootstrap3/mixins/buttons.less
deleted file mode 100755
index 6875a97c..00000000
--- a/src/less/bootstrap3/mixins/buttons.less
+++ /dev/null
@@ -1,68 +0,0 @@
-// Button variants
-//
-// Easily pump out default styles, as well as :hover, :focus, :active,
-// and disabled options for all buttons
-
-.button-variant(@color; @background; @border) {
-  color: @color;
-  background-color: @background;
-  border-color: @border;
-
-  &:focus,
-  &.focus {
-    color: @color;
-    background-color: darken(@background, 10%);
-        border-color: darken(@border, 25%);
-  }
-  &:hover {
-    color: @color;
-    background-color: darken(@background, 10%);
-        border-color: darken(@border, 12%);
-  }
-  &:active,
-  &.active,
-  .open > .dropdown-toggle& {
-    color: @color;
-    background-color: darken(@background, 10%);
-        border-color: darken(@border, 12%);
-
-    &:hover,
-    &:focus,
-    &.focus {
-      color: @color;
-      background-color: darken(@background, 17%);
-          border-color: darken(@border, 25%);
-    }
-  }
-  &:active,
-  &.active,
-  .open > .dropdown-toggle& {
-    background-image: none;
-  }
-  &.disabled,
-  &[disabled],
-  fieldset[disabled] & {
-    &,
-    &:hover,
-    &:focus,
-    &.focus,
-    &:active,
-    &.active {
-      background-color: @background;
-          border-color: @border;
-    }
-  }
-
-  .badge {
-    color: @background;
-    background-color: @color;
-  }
-}
-
-// Button sizes
-.button-size(@padding-vertical; @padding-horizontal; @font-size; @line-height; @border-radius) {
-  padding: @padding-vertical @padding-horizontal;
-  font-size: @font-size;
-  line-height: @line-height;
-  border-radius: @border-radius;
-}
diff --git a/src/less/bootstrap3/mixins/center-block.less b/src/less/bootstrap3/mixins/center-block.less
deleted file mode 100755
index d18d6de9..00000000
--- a/src/less/bootstrap3/mixins/center-block.less
+++ /dev/null
@@ -1,7 +0,0 @@
-// Center-align a block level element
-
-.center-block() {
-  display: block;
-  margin-left: auto;
-  margin-right: auto;
-}
diff --git a/src/less/bootstrap3/mixins/clearfix.less b/src/less/bootstrap3/mixins/clearfix.less
deleted file mode 100755
index 3f7a3820..00000000
--- a/src/less/bootstrap3/mixins/clearfix.less
+++ /dev/null
@@ -1,22 +0,0 @@
-// Clearfix
-//
-// For modern browsers
-// 1. The space content is one way to avoid an Opera bug when the
-//    contenteditable attribute is included anywhere else in the document.
-//    Otherwise it causes space to appear at the top and bottom of elements
-//    that are clearfixed.
-// 2. The use of `table` rather than `block` is only necessary if using
-//    `:before` to contain the top-margins of child elements.
-//
-// Source: http://nicolasgallagher.com/micro-clearfix-hack/
-
-.clearfix() {
-  &:before,
-  &:after {
-    content: " "; // 1
-    display: table; // 2
-  }
-  &:after {
-    clear: both;
-  }
-}
diff --git a/src/less/bootstrap3/mixins/forms.less b/src/less/bootstrap3/mixins/forms.less
deleted file mode 100755
index 6f55ed96..00000000
--- a/src/less/bootstrap3/mixins/forms.less
+++ /dev/null
@@ -1,85 +0,0 @@
-// Form validation states
-//
-// Used in forms.less to generate the form validation CSS for warnings, errors,
-// and successes.
-
-.form-control-validation(@text-color: #555; @border-color: #ccc; @background-color: #f5f5f5) {
-  // Color the label and help text
-  .help-block,
-  .control-label,
-  .radio,
-  .checkbox,
-  .radio-inline,
-  .checkbox-inline,
-  &.radio label,
-  &.checkbox label,
-  &.radio-inline label,
-  &.checkbox-inline label  {
-    color: @text-color;
-  }
-  // Set the border and box shadow on specific inputs to match
-  .form-control {
-    border-color: @border-color;
-    .box-shadow(inset 0 1px 1px rgba(0,0,0,.075)); // Redeclare so transitions work
-    &:focus {
-      border-color: darken(@border-color, 10%);
-      @shadow: inset 0 1px 1px rgba(0,0,0,.075), 0 0 6px lighten(@border-color, 20%);
-      .box-shadow(@shadow);
-    }
-  }
-  // Set validation states also for addons
-  .input-group-addon {
-    color: @text-color;
-    border-color: @border-color;
-    background-color: @background-color;
-  }
-  // Optional feedback icon
-  .form-control-feedback {
-    color: @text-color;
-  }
-}
-
-
-// Form control focus state
-//
-// Generate a customized focus state and for any input with the specified color,
-// which defaults to the `@input-border-focus` variable.
-//
-// We highly encourage you to not customize the default value, but instead use
-// this to tweak colors on an as-needed basis. This aesthetic change is based on
-// WebKit's default styles, but applicable to a wider range of browsers. Its
-// usability and accessibility should be taken into account with any change.
-//
-// Example usage: change the default blue border and shadow to white for better
-// contrast against a dark gray background.
-.form-control-focus(@color: @input-border-focus) {
-  @color-rgba: rgba(red(@color), green(@color), blue(@color), .6);
-  &:focus {
-    border-color: @color;
-    outline: 0;
-    .box-shadow(~"inset 0 1px 1px rgba(0,0,0,.075), 0 0 8px @{color-rgba}");
-  }
-}
-
-// Form control sizing
-//
-// Relative text size, padding, and border-radii changes for form controls. For
-// horizontal sizing, wrap controls in the predefined grid classes. `<select>`
-// element gets special love because it's special, and that's a fact!
-.input-size(@input-height; @padding-vertical; @padding-horizontal; @font-size; @line-height; @border-radius) {
-  height: @input-height;
-  padding: @padding-vertical @padding-horizontal;
-  font-size: @font-size;
-  line-height: @line-height;
-  border-radius: @border-radius;
-
-  select& {
-    height: @input-height;
-    line-height: @input-height;
-  }
-
-  textarea&,
-  select[multiple]& {
-    height: auto;
-  }
-}
diff --git a/src/less/bootstrap3/mixins/gradients.less b/src/less/bootstrap3/mixins/gradients.less
deleted file mode 100755
index 0b88a89c..00000000
--- a/src/less/bootstrap3/mixins/gradients.less
+++ /dev/null
@@ -1,59 +0,0 @@
-// Gradients
-
-#gradient {
-
-  // Horizontal gradient, from left to right
-  //
-  // Creates two color stops, start and end, by specifying a color and position for each color stop.
-  // Color stops are not available in IE9 and below.
-  .horizontal(@start-color: #555; @end-color: #333; @start-percent: 0%; @end-percent: 100%) {
-    background-image: -webkit-linear-gradient(left, @start-color @start-percent, @end-color @end-percent); // Safari 5.1-6, Chrome 10+
-    background-image: -o-linear-gradient(left, @start-color @start-percent, @end-color @end-percent); // Opera 12
-    background-image: linear-gradient(to right, @start-color @start-percent, @end-color @end-percent); // Standard, IE10, Firefox 16+, Opera 12.10+, Safari 7+, Chrome 26+
-    background-repeat: repeat-x;
-    filter: e(%("progid:DXImageTransform.Microsoft.gradient(startColorstr='%d', endColorstr='%d', GradientType=1)",argb(@start-color),argb(@end-color))); // IE9 and down
-  }
-
-  // Vertical gradient, from top to bottom
-  //
-  // Creates two color stops, start and end, by specifying a color and position for each color stop.
-  // Color stops are not available in IE9 and below.
-  .vertical(@start-color: #555; @end-color: #333; @start-percent: 0%; @end-percent: 100%) {
-    background-image: -webkit-linear-gradient(top, @start-color @start-percent, @end-color @end-percent);  // Safari 5.1-6, Chrome 10+
-    background-image: -o-linear-gradient(top, @start-color @start-percent, @end-color @end-percent);  // Opera 12
-    background-image: linear-gradient(to bottom, @start-color @start-percent, @end-color @end-percent); // Standard, IE10, Firefox 16+, Opera 12.10+, Safari 7+, Chrome 26+
-    background-repeat: repeat-x;
-    filter: e(%("progid:DXImageTransform.Microsoft.gradient(startColorstr='%d', endColorstr='%d', GradientType=0)",argb(@start-color),argb(@end-color))); // IE9 and down
-  }
-
-  .directional(@start-color: #555; @end-color: #333; @deg: 45deg) {
-    background-repeat: repeat-x;
-    background-image: -webkit-linear-gradient(@deg, @start-color, @end-color); // Safari 5.1-6, Chrome 10+
-    background-image: -o-linear-gradient(@deg, @start-color, @end-color); // Opera 12
-    background-image: linear-gradient(@deg, @start-color, @end-color); // Standard, IE10, Firefox 16+, Opera 12.10+, Safari 7+, Chrome 26+
-  }
-  .horizontal-three-colors(@start-color: #00b3ee; @mid-color: #7a43b6; @color-stop: 50%; @end-color: #c3325f) {
-    background-image: -webkit-linear-gradient(left, @start-color, @mid-color @color-stop, @end-color);
-    background-image: -o-linear-gradient(left, @start-color, @mid-color @color-stop, @end-color);
-    background-image: linear-gradient(to right, @start-color, @mid-color @color-stop, @end-color);
-    background-repeat: no-repeat;
-    filter: e(%("progid:DXImageTransform.Microsoft.gradient(startColorstr='%d', endColorstr='%d', GradientType=1)",argb(@start-color),argb(@end-color))); // IE9 and down, gets no color-stop at all for proper fallback
-  }
-  .vertical-three-colors(@start-color: #00b3ee; @mid-color: #7a43b6; @color-stop: 50%; @end-color: #c3325f) {
-    background-image: -webkit-linear-gradient(@start-color, @mid-color @color-stop, @end-color);
-    background-image: -o-linear-gradient(@start-color, @mid-color @color-stop, @end-color);
-    background-image: linear-gradient(@start-color, @mid-color @color-stop, @end-color);
-    background-repeat: no-repeat;
-    filter: e(%("progid:DXImageTransform.Microsoft.gradient(startColorstr='%d', endColorstr='%d', GradientType=0)",argb(@start-color),argb(@end-color))); // IE9 and down, gets no color-stop at all for proper fallback
-  }
-  .radial(@inner-color: #555; @outer-color: #333) {
-    background-image: -webkit-radial-gradient(circle, @inner-color, @outer-color);
-    background-image: radial-gradient(circle, @inner-color, @outer-color);
-    background-repeat: no-repeat;
-  }
-  .striped(@color: rgba(255,255,255,.15); @angle: 45deg) {
-    background-image: -webkit-linear-gradient(@angle, @color 25%, transparent 25%, transparent 50%, @color 50%, @color 75%, transparent 75%, transparent);
-    background-image: -o-linear-gradient(@angle, @color 25%, transparent 25%, transparent 50%, @color 50%, @color 75%, transparent 75%, transparent);
-    background-image: linear-gradient(@angle, @color 25%, transparent 25%, transparent 50%, @color 50%, @color 75%, transparent 75%, transparent);
-  }
-}
diff --git a/src/less/bootstrap3/mixins/grid-framework.less b/src/less/bootstrap3/mixins/grid-framework.less
deleted file mode 100755
index f3b3929d..00000000
--- a/src/less/bootstrap3/mixins/grid-framework.less
+++ /dev/null
@@ -1,91 +0,0 @@
-// Framework grid generation
-//
-// Used only by Bootstrap to generate the correct number of grid classes given
-// any value of `@grid-columns`.
-
-.make-grid-columns() {
-  // Common styles for all sizes of grid columns, widths 1-12
-  .col(@index) { // initial
-    @item: ~".col-xs-@{index}, .col-sm-@{index}, .col-md-@{index}, .col-lg-@{index}";
-    .col((@index + 1), @item);
-  }
-  .col(@index, @list) when (@index =< @grid-columns) { // general; "=<" isn't a typo
-    @item: ~".col-xs-@{index}, .col-sm-@{index}, .col-md-@{index}, .col-lg-@{index}";
-    .col((@index + 1), ~"@{list}, @{item}");
-  }
-  .col(@index, @list) when (@index > @grid-columns) { // terminal
-    @{list} {
-      position: relative;
-      // Prevent columns from collapsing when empty
-      min-height: 1px;
-      // Inner gutter via padding
-      padding-left:  (@grid-gutter-width / 2);
-      padding-right: (@grid-gutter-width / 2);
-    }
-  }
-  .col(1); // kickstart it
-}
-
-.float-grid-columns(@class) {
-  .col(@index) { // initial
-    @item: ~".col-@{class}-@{index}";
-    .col((@index + 1), @item);
-  }
-  .col(@index, @list) when (@index =< @grid-columns) { // general
-    @item: ~".col-@{class}-@{index}";
-    .col((@index + 1), ~"@{list}, @{item}");
-  }
-  .col(@index, @list) when (@index > @grid-columns) { // terminal
-    @{list} {
-      float: left;
-    }
-  }
-  .col(1); // kickstart it
-}
-
-.calc-grid-column(@index, @class, @type) when (@type = width) and (@index > 0) {
-  .col-@{class}-@{index} {
-    width: percentage((@index / @grid-columns));
-  }
-}
-.calc-grid-column(@index, @class, @type) when (@type = push) and (@index > 0) {
-  .col-@{class}-push-@{index} {
-    left: percentage((@index / @grid-columns));
-  }
-}
-.calc-grid-column(@index, @class, @type) when (@type = push) and (@index = 0) {
-  .col-@{class}-push-0 {
-    left: auto;
-  }
-}
-.calc-grid-column(@index, @class, @type) when (@type = pull) and (@index > 0) {
-  .col-@{class}-pull-@{index} {
-    right: percentage((@index / @grid-columns));
-  }
-}
-.calc-grid-column(@index, @class, @type) when (@type = pull) and (@index = 0) {
-  .col-@{class}-pull-0 {
-    right: auto;
-  }
-}
-.calc-grid-column(@index, @class, @type) when (@type = offset) {
-  .col-@{class}-offset-@{index} {
-    margin-left: percentage((@index / @grid-columns));
-  }
-}
-
-// Basic looping in LESS
-.loop-grid-columns(@index, @class, @type) when (@index >= 0) {
-  .calc-grid-column(@index, @class, @type);
-  // next iteration
-  .loop-grid-columns((@index - 1), @class, @type);
-}
-
-// Create grid for specific class
-.make-grid(@class) {
-  .float-grid-columns(@class);
-  .loop-grid-columns(@grid-columns, @class, width);
-  .loop-grid-columns(@grid-columns, @class, pull);
-  .loop-grid-columns(@grid-columns, @class, push);
-  .loop-grid-columns(@grid-columns, @class, offset);
-}
diff --git a/src/less/bootstrap3/mixins/grid.less b/src/less/bootstrap3/mixins/grid.less
deleted file mode 100755
index cae5eaff..00000000
--- a/src/less/bootstrap3/mixins/grid.less
+++ /dev/null
@@ -1,122 +0,0 @@
-// Grid system
-//
-// Generate semantic grid columns with these mixins.
-
-// Centered container element
-.container-fixed(@gutter: @grid-gutter-width) {
-  margin-right: auto;
-  margin-left: auto;
-  padding-left:  (@gutter / 2);
-  padding-right: (@gutter / 2);
-  &:extend(.clearfix all);
-}
-
-// Creates a wrapper for a series of columns
-.make-row(@gutter: @grid-gutter-width) {
-  margin-left:  (@gutter / -2);
-  margin-right: (@gutter / -2);
-  &:extend(.clearfix all);
-}
-
-// Generate the extra small columns
-.make-xs-column(@columns; @gutter: @grid-gutter-width) {
-  position: relative;
-  float: left;
-  width: percentage((@columns / @grid-columns));
-  min-height: 1px;
-  padding-left:  (@gutter / 2);
-  padding-right: (@gutter / 2);
-}
-.make-xs-column-offset(@columns) {
-  margin-left: percentage((@columns / @grid-columns));
-}
-.make-xs-column-push(@columns) {
-  left: percentage((@columns / @grid-columns));
-}
-.make-xs-column-pull(@columns) {
-  right: percentage((@columns / @grid-columns));
-}
-
-// Generate the small columns
-.make-sm-column(@columns; @gutter: @grid-gutter-width) {
-  position: relative;
-  min-height: 1px;
-  padding-left:  (@gutter / 2);
-  padding-right: (@gutter / 2);
-
-  @media (min-width: @screen-sm-min) {
-    float: left;
-    width: percentage((@columns / @grid-columns));
-  }
-}
-.make-sm-column-offset(@columns) {
-  @media (min-width: @screen-sm-min) {
-    margin-left: percentage((@columns / @grid-columns));
-  }
-}
-.make-sm-column-push(@columns) {
-  @media (min-width: @screen-sm-min) {
-    left: percentage((@columns / @grid-columns));
-  }
-}
-.make-sm-column-pull(@columns) {
-  @media (min-width: @screen-sm-min) {
-    right: percentage((@columns / @grid-columns));
-  }
-}
-
-// Generate the medium columns
-.make-md-column(@columns; @gutter: @grid-gutter-width) {
-  position: relative;
-  min-height: 1px;
-  padding-left:  (@gutter / 2);
-  padding-right: (@gutter / 2);
-
-  @media (min-width: @screen-md-min) {
-    float: left;
-    width: percentage((@columns / @grid-columns));
-  }
-}
-.make-md-column-offset(@columns) {
-  @media (min-width: @screen-md-min) {
-    margin-left: percentage((@columns / @grid-columns));
-  }
-}
-.make-md-column-push(@columns) {
-  @media (min-width: @screen-md-min) {
-    left: percentage((@columns / @grid-columns));
-  }
-}
-.make-md-column-pull(@columns) {
-  @media (min-width: @screen-md-min) {
-    right: percentage((@columns / @grid-columns));
-  }
-}
-
-// Generate the large columns
-.make-lg-column(@columns; @gutter: @grid-gutter-width) {
-  position: relative;
-  min-height: 1px;
-  padding-left:  (@gutter / 2);
-  padding-right: (@gutter / 2);
-
-  @media (min-width: @screen-lg-min) {
-    float: left;
-    width: percentage((@columns / @grid-columns));
-  }
-}
-.make-lg-column-offset(@columns) {
-  @media (min-width: @screen-lg-min) {
-    margin-left: percentage((@columns / @grid-columns));
-  }
-}
-.make-lg-column-push(@columns) {
-  @media (min-width: @screen-lg-min) {
-    left: percentage((@columns / @grid-columns));
-  }
-}
-.make-lg-column-pull(@columns) {
-  @media (min-width: @screen-lg-min) {
-    right: percentage((@columns / @grid-columns));
-  }
-}
diff --git a/src/less/bootstrap3/mixins/hide-text.less b/src/less/bootstrap3/mixins/hide-text.less
deleted file mode 100755
index c2315e57..00000000
--- a/src/less/bootstrap3/mixins/hide-text.less
+++ /dev/null
@@ -1,21 +0,0 @@
-// CSS image replacement
-//
-// Heads up! v3 launched with with only `.hide-text()`, but per our pattern for
-// mixins being reused as classes with the same name, this doesn't hold up. As
-// of v3.0.1 we have added `.text-hide()` and deprecated `.hide-text()`.
-//
-// Source: https://github.com/h5bp/html5-boilerplate/commit/aa0396eae757
-
-// Deprecated as of v3.0.1 (will be removed in v4)
-.hide-text() {
-  font: ~"0/0" a;
-  color: transparent;
-  text-shadow: none;
-  background-color: transparent;
-  border: 0;
-}
-
-// New mixin to use as of v3.0.1
-.text-hide() {
-  .hide-text();
-}
diff --git a/src/less/bootstrap3/mixins/image.less b/src/less/bootstrap3/mixins/image.less
deleted file mode 100755
index f233cb3e..00000000
--- a/src/less/bootstrap3/mixins/image.less
+++ /dev/null
@@ -1,33 +0,0 @@
-// Image Mixins
-// - Responsive image
-// - Retina image
-
-
-// Responsive image
-//
-// Keep images from scaling beyond the width of their parents.
-.img-responsive(@display: block) {
-  display: @display;
-  max-width: 100%; // Part 1: Set a maximum relative to the parent
-  height: auto; // Part 2: Scale the height according to the width, otherwise you get stretching
-}
-
-
-// Retina image
-//
-// Short retina mixin for setting background-image and -size. Note that the
-// spelling of `min--moz-device-pixel-ratio` is intentional.
-.img-retina(@file-1x; @file-2x; @width-1x; @height-1x) {
-  background-image: url("@{file-1x}");
-
-  @media
-  only screen and (-webkit-min-device-pixel-ratio: 2),
-  only screen and (   min--moz-device-pixel-ratio: 2),
-  only screen and (     -o-min-device-pixel-ratio: 2/1),
-  only screen and (        min-device-pixel-ratio: 2),
-  only screen and (                min-resolution: 192dpi),
-  only screen and (                min-resolution: 2dppx) {
-    background-image: url("@{file-2x}");
-    background-size: @width-1x @height-1x;
-  }
-}
diff --git a/src/less/bootstrap3/mixins/labels.less b/src/less/bootstrap3/mixins/labels.less
deleted file mode 100755
index 9f7a67ee..00000000
--- a/src/less/bootstrap3/mixins/labels.less
+++ /dev/null
@@ -1,12 +0,0 @@
-// Labels
-
-.label-variant(@color) {
-  background-color: @color;
-
-  &[href] {
-    &:hover,
-    &:focus {
-      background-color: darken(@color, 10%);
-    }
-  }
-}
diff --git a/src/less/bootstrap3/mixins/list-group.less b/src/less/bootstrap3/mixins/list-group.less
deleted file mode 100755
index 8b5b065c..00000000
--- a/src/less/bootstrap3/mixins/list-group.less
+++ /dev/null
@@ -1,29 +0,0 @@
-// List Groups
-
-.list-group-item-variant(@state; @background; @color) {
-  .list-group-item-@{state} {
-    color: @color;
-    background-color: @background;
-
-    a& {
-      color: @color;
-
-      .list-group-item-heading {
-        color: inherit;
-      }
-
-      &:hover,
-      &:focus {
-        color: @color;
-        background-color: darken(@background, 5%);
-      }
-      &.active,
-      &.active:hover,
-      &.active:focus {
-        color: #fff;
-        background-color: @color;
-        border-color: @color;
-      }
-    }
-  }
-}
diff --git a/src/less/bootstrap3/mixins/nav-divider.less b/src/less/bootstrap3/mixins/nav-divider.less
deleted file mode 100755
index feb1e9ed..00000000
--- a/src/less/bootstrap3/mixins/nav-divider.less
+++ /dev/null
@@ -1,10 +0,0 @@
-// Horizontal dividers
-//
-// Dividers (basically an hr) within dropdowns and nav lists
-
-.nav-divider(@color: #e5e5e5) {
-  height: 1px;
-  margin: ((@line-height-computed / 2) - 1) 0;
-  overflow: hidden;
-  background-color: @color;
-}
diff --git a/src/less/bootstrap3/mixins/nav-vertical-align.less b/src/less/bootstrap3/mixins/nav-vertical-align.less
deleted file mode 100755
index d458c786..00000000
--- a/src/less/bootstrap3/mixins/nav-vertical-align.less
+++ /dev/null
@@ -1,9 +0,0 @@
-// Navbar vertical align
-//
-// Vertically center elements in the navbar.
-// Example: an element has a height of 30px, so write out `.navbar-vertical-align(30px);` to calculate the appropriate top margin.
-
-.navbar-vertical-align(@element-height) {
-  margin-top: ((@navbar-height - @element-height) / 2);
-  margin-bottom: ((@navbar-height - @element-height) / 2);
-}
diff --git a/src/less/bootstrap3/mixins/opacity.less b/src/less/bootstrap3/mixins/opacity.less
deleted file mode 100755
index 33ed25ce..00000000
--- a/src/less/bootstrap3/mixins/opacity.less
+++ /dev/null
@@ -1,8 +0,0 @@
-// Opacity
-
-.opacity(@opacity) {
-  opacity: @opacity;
-  // IE8 filter
-  @opacity-ie: (@opacity * 100);
-  filter: ~"alpha(opacity=@{opacity-ie})";
-}
diff --git a/src/less/bootstrap3/mixins/pagination.less b/src/less/bootstrap3/mixins/pagination.less
deleted file mode 100755
index 7deb505d..00000000
--- a/src/less/bootstrap3/mixins/pagination.less
+++ /dev/null
@@ -1,23 +0,0 @@
-// Pagination
-
-.pagination-size(@padding-vertical; @padding-horizontal; @font-size; @border-radius) {
-  > li {
-    > a,
-    > span {
-      padding: @padding-vertical @padding-horizontal;
-      font-size: @font-size;
-    }
-    &:first-child {
-      > a,
-      > span {
-        .border-left-radius(@border-radius);
-      }
-    }
-    &:last-child {
-      > a,
-      > span {
-        .border-right-radius(@border-radius);
-      }
-    }
-  }
-}
diff --git a/src/less/bootstrap3/mixins/panels.less b/src/less/bootstrap3/mixins/panels.less
deleted file mode 100755
index 49ee10d4..00000000
--- a/src/less/bootstrap3/mixins/panels.less
+++ /dev/null
@@ -1,24 +0,0 @@
-// Panels
-
-.panel-variant(@border; @heading-text-color; @heading-bg-color; @heading-border) {
-  border-color: @border;
-
-  & > .panel-heading {
-    color: @heading-text-color;
-    background-color: @heading-bg-color;
-    border-color: @heading-border;
-
-    + .panel-collapse > .panel-body {
-      border-top-color: @border;
-    }
-    .badge {
-      color: @heading-bg-color;
-      background-color: @heading-text-color;
-    }
-  }
-  & > .panel-footer {
-    + .panel-collapse > .panel-body {
-      border-bottom-color: @border;
-    }
-  }
-}
diff --git a/src/less/bootstrap3/mixins/progress-bar.less b/src/less/bootstrap3/mixins/progress-bar.less
deleted file mode 100755
index f07996a3..00000000
--- a/src/less/bootstrap3/mixins/progress-bar.less
+++ /dev/null
@@ -1,10 +0,0 @@
-// Progress bars
-
-.progress-bar-variant(@color) {
-  background-color: @color;
-
-  // Deprecated parent class requirement as of v3.2.0
-  .progress-striped & {
-    #gradient > .striped();
-  }
-}
diff --git a/src/less/bootstrap3/mixins/reset-filter.less b/src/less/bootstrap3/mixins/reset-filter.less
deleted file mode 100755
index 68cdb5e1..00000000
--- a/src/less/bootstrap3/mixins/reset-filter.less
+++ /dev/null
@@ -1,8 +0,0 @@
-// Reset filters for IE
-//
-// When you need to remove a gradient background, do not forget to use this to reset
-// the IE filter for IE9 and below.
-
-.reset-filter() {
-  filter: e(%("progid:DXImageTransform.Microsoft.gradient(enabled = false)"));
-}
diff --git a/src/less/bootstrap3/mixins/reset-text.less b/src/less/bootstrap3/mixins/reset-text.less
deleted file mode 100755
index 58dd4d19..00000000
--- a/src/less/bootstrap3/mixins/reset-text.less
+++ /dev/null
@@ -1,18 +0,0 @@
-.reset-text() {
-  font-family: @font-family-base;
-  // We deliberately do NOT reset font-size.
-  font-style: normal;
-  font-weight: normal;
-  letter-spacing: normal;
-  line-break: auto;
-  line-height: @line-height-base;
-  text-align: left; // Fallback for where `start` is not supported
-  text-align: start;
-  text-decoration: none;
-  text-shadow: none;
-  text-transform: none;
-  white-space: normal;
-  word-break: normal;
-  word-spacing: normal;
-  word-wrap: normal;
-}
diff --git a/src/less/bootstrap3/mixins/resize.less b/src/less/bootstrap3/mixins/resize.less
deleted file mode 100755
index 3acd3afd..00000000
--- a/src/less/bootstrap3/mixins/resize.less
+++ /dev/null
@@ -1,6 +0,0 @@
-// Resize anything
-
-.resizable(@direction) {
-  resize: @direction; // Options: horizontal, vertical, both
-  overflow: auto; // Per CSS3 UI, `resize` only applies when `overflow` isn't `visible`
-}
diff --git a/src/less/bootstrap3/mixins/responsive-visibility.less b/src/less/bootstrap3/mixins/responsive-visibility.less
deleted file mode 100755
index ecf1e979..00000000
--- a/src/less/bootstrap3/mixins/responsive-visibility.less
+++ /dev/null
@@ -1,15 +0,0 @@
-// Responsive utilities
-
-//
-// More easily include all the states for responsive-utilities.less.
-.responsive-visibility() {
-  display: block !important;
-  table&  { display: table !important; }
-  tr&     { display: table-row !important; }
-  th&,
-  td&     { display: table-cell !important; }
-}
-
-.responsive-invisibility() {
-  display: none !important;
-}
diff --git a/src/less/bootstrap3/mixins/size.less b/src/less/bootstrap3/mixins/size.less
deleted file mode 100755
index a8be6508..00000000
--- a/src/less/bootstrap3/mixins/size.less
+++ /dev/null
@@ -1,10 +0,0 @@
-// Sizing shortcuts
-
-.size(@width; @height) {
-  width: @width;
-  height: @height;
-}
-
-.square(@size) {
-  .size(@size; @size);
-}
diff --git a/src/less/bootstrap3/mixins/tab-focus.less b/src/less/bootstrap3/mixins/tab-focus.less
deleted file mode 100755
index 1f1f05ab..00000000
--- a/src/less/bootstrap3/mixins/tab-focus.less
+++ /dev/null
@@ -1,9 +0,0 @@
-// WebKit-style focus
-
-.tab-focus() {
-  // Default
-  outline: thin dotted;
-  // WebKit
-  outline: 5px auto -webkit-focus-ring-color;
-  outline-offset: -2px;
-}
diff --git a/src/less/bootstrap3/mixins/table-row.less b/src/less/bootstrap3/mixins/table-row.less
deleted file mode 100755
index 0f287f1a..00000000
--- a/src/less/bootstrap3/mixins/table-row.less
+++ /dev/null
@@ -1,28 +0,0 @@
-// Tables
-
-.table-row-variant(@state; @background) {
-  // Exact selectors below required to override `.table-striped` and prevent
-  // inheritance to nested tables.
-  .table > thead > tr,
-  .table > tbody > tr,
-  .table > tfoot > tr {
-    > td.@{state},
-    > th.@{state},
-    &.@{state} > td,
-    &.@{state} > th {
-      background-color: @background;
-    }
-  }
-
-  // Hover states for `.table-hover`
-  // Note: this is not available for cells or rows within `thead` or `tfoot`.
-  .table-hover > tbody > tr {
-    > td.@{state}:hover,
-    > th.@{state}:hover,
-    &.@{state}:hover > td,
-    &:hover > .@{state},
-    &.@{state}:hover > th {
-      background-color: darken(@background, 5%);
-    }
-  }
-}
diff --git a/src/less/bootstrap3/mixins/text-emphasis.less b/src/less/bootstrap3/mixins/text-emphasis.less
deleted file mode 100755
index 9e8a77a6..00000000
--- a/src/less/bootstrap3/mixins/text-emphasis.less
+++ /dev/null
@@ -1,9 +0,0 @@
-// Typography
-
-.text-emphasis-variant(@color) {
-  color: @color;
-  a&:hover,
-  a&:focus {
-    color: darken(@color, 10%);
-  }
-}
diff --git a/src/less/bootstrap3/mixins/text-overflow.less b/src/less/bootstrap3/mixins/text-overflow.less
deleted file mode 100755
index c11ad2fb..00000000
--- a/src/less/bootstrap3/mixins/text-overflow.less
+++ /dev/null
@@ -1,8 +0,0 @@
-// Text overflow
-// Requires inline-block or block for proper styling
-
-.text-overflow() {
-  overflow: hidden;
-  text-overflow: ellipsis;
-  white-space: nowrap;
-}
diff --git a/src/less/bootstrap3/mixins/vendor-prefixes.less b/src/less/bootstrap3/mixins/vendor-prefixes.less
deleted file mode 100755
index afd3331c..00000000
--- a/src/less/bootstrap3/mixins/vendor-prefixes.less
+++ /dev/null
@@ -1,227 +0,0 @@
-// Vendor Prefixes
-//
-// All vendor mixins are deprecated as of v3.2.0 due to the introduction of
-// Autoprefixer in our Gruntfile. They will be removed in v4.
-
-// - Animations
-// - Backface visibility
-// - Box shadow
-// - Box sizing
-// - Content columns
-// - Hyphens
-// - Placeholder text
-// - Transformations
-// - Transitions
-// - User Select
-
-
-// Animations
-.animation(@animation) {
-  -webkit-animation: @animation;
-       -o-animation: @animation;
-          animation: @animation;
-}
-.animation-name(@name) {
-  -webkit-animation-name: @name;
-          animation-name: @name;
-}
-.animation-duration(@duration) {
-  -webkit-animation-duration: @duration;
-          animation-duration: @duration;
-}
-.animation-timing-function(@timing-function) {
-  -webkit-animation-timing-function: @timing-function;
-          animation-timing-function: @timing-function;
-}
-.animation-delay(@delay) {
-  -webkit-animation-delay: @delay;
-          animation-delay: @delay;
-}
-.animation-iteration-count(@iteration-count) {
-  -webkit-animation-iteration-count: @iteration-count;
-          animation-iteration-count: @iteration-count;
-}
-.animation-direction(@direction) {
-  -webkit-animation-direction: @direction;
-          animation-direction: @direction;
-}
-.animation-fill-mode(@fill-mode) {
-  -webkit-animation-fill-mode: @fill-mode;
-          animation-fill-mode: @fill-mode;
-}
-
-// Backface visibility
-// Prevent browsers from flickering when using CSS 3D transforms.
-// Default value is `visible`, but can be changed to `hidden`
-
-.backface-visibility(@visibility){
-  -webkit-backface-visibility: @visibility;
-     -moz-backface-visibility: @visibility;
-          backface-visibility: @visibility;
-}
-
-// Drop shadows
-//
-// Note: Deprecated `.box-shadow()` as of v3.1.0 since all of Bootstrap's
-// supported browsers that have box shadow capabilities now support it.
-
-.box-shadow(@shadow) {
-  -webkit-box-shadow: @shadow; // iOS <4.3 & Android <4.1
-          box-shadow: @shadow;
-}
-
-// Box sizing
-.box-sizing(@boxmodel) {
-  -webkit-box-sizing: @boxmodel;
-     -moz-box-sizing: @boxmodel;
-          box-sizing: @boxmodel;
-}
-
-// CSS3 Content Columns
-.content-columns(@column-count; @column-gap: @grid-gutter-width) {
-  -webkit-column-count: @column-count;
-     -moz-column-count: @column-count;
-          column-count: @column-count;
-  -webkit-column-gap: @column-gap;
-     -moz-column-gap: @column-gap;
-          column-gap: @column-gap;
-}
-
-// Optional hyphenation
-.hyphens(@mode: auto) {
-  word-wrap: break-word;
-  -webkit-hyphens: @mode;
-     -moz-hyphens: @mode;
-      -ms-hyphens: @mode; // IE10+
-       -o-hyphens: @mode;
-          hyphens: @mode;
-}
-
-// Placeholder text
-.placeholder(@color: @input-color-placeholder) {
-  // Firefox
-  &::-moz-placeholder {
-    color: @color;
-    opacity: 1; // Override Firefox's unusual default opacity; see https://github.com/twbs/bootstrap/pull/11526
-  }
-  &:-ms-input-placeholder { color: @color; } // Internet Explorer 10+
-  &::-webkit-input-placeholder  { color: @color; } // Safari and Chrome
-}
-
-// Transformations
-.scale(@ratio) {
-  -webkit-transform: scale(@ratio);
-      -ms-transform: scale(@ratio); // IE9 only
-       -o-transform: scale(@ratio);
-          transform: scale(@ratio);
-}
-.scale(@ratioX; @ratioY) {
-  -webkit-transform: scale(@ratioX, @ratioY);
-      -ms-transform: scale(@ratioX, @ratioY); // IE9 only
-       -o-transform: scale(@ratioX, @ratioY);
-          transform: scale(@ratioX, @ratioY);
-}
-.scaleX(@ratio) {
-  -webkit-transform: scaleX(@ratio);
-      -ms-transform: scaleX(@ratio); // IE9 only
-       -o-transform: scaleX(@ratio);
-          transform: scaleX(@ratio);
-}
-.scaleY(@ratio) {
-  -webkit-transform: scaleY(@ratio);
-      -ms-transform: scaleY(@ratio); // IE9 only
-       -o-transform: scaleY(@ratio);
-          transform: scaleY(@ratio);
-}
-.skew(@x; @y) {
-  -webkit-transform: skewX(@x) skewY(@y);
-      -ms-transform: skewX(@x) skewY(@y); // See https://github.com/twbs/bootstrap/issues/4885; IE9+
-       -o-transform: skewX(@x) skewY(@y);
-          transform: skewX(@x) skewY(@y);
-}
-.translate(@x; @y) {
-  -webkit-transform: translate(@x, @y);
-      -ms-transform: translate(@x, @y); // IE9 only
-       -o-transform: translate(@x, @y);
-          transform: translate(@x, @y);
-}
-.translate3d(@x; @y; @z) {
-  -webkit-transform: translate3d(@x, @y, @z);
-          transform: translate3d(@x, @y, @z);
-}
-.rotate(@degrees) {
-  -webkit-transform: rotate(@degrees);
-      -ms-transform: rotate(@degrees); // IE9 only
-       -o-transform: rotate(@degrees);
-          transform: rotate(@degrees);
-}
-.rotateX(@degrees) {
-  -webkit-transform: rotateX(@degrees);
-      -ms-transform: rotateX(@degrees); // IE9 only
-       -o-transform: rotateX(@degrees);
-          transform: rotateX(@degrees);
-}
-.rotateY(@degrees) {
-  -webkit-transform: rotateY(@degrees);
-      -ms-transform: rotateY(@degrees); // IE9 only
-       -o-transform: rotateY(@degrees);
-          transform: rotateY(@degrees);
-}
-.perspective(@perspective) {
-  -webkit-perspective: @perspective;
-     -moz-perspective: @perspective;
-          perspective: @perspective;
-}
-.perspective-origin(@perspective) {
-  -webkit-perspective-origin: @perspective;
-     -moz-perspective-origin: @perspective;
-          perspective-origin: @perspective;
-}
-.transform-origin(@origin) {
-  -webkit-transform-origin: @origin;
-     -moz-transform-origin: @origin;
-      -ms-transform-origin: @origin; // IE9 only
-          transform-origin: @origin;
-}
-
-
-// Transitions
-
-.transition(@transition) {
-  -webkit-transition: @transition;
-       -o-transition: @transition;
-          transition: @transition;
-}
-.transition-property(@transition-property) {
-  -webkit-transition-property: @transition-property;
-          transition-property: @transition-property;
-}
-.transition-delay(@transition-delay) {
-  -webkit-transition-delay: @transition-delay;
-          transition-delay: @transition-delay;
-}
-.transition-duration(@transition-duration) {
-  -webkit-transition-duration: @transition-duration;
-          transition-duration: @transition-duration;
-}
-.transition-timing-function(@timing-function) {
-  -webkit-transition-timing-function: @timing-function;
-          transition-timing-function: @timing-function;
-}
-.transition-transform(@transition) {
-  -webkit-transition: -webkit-transform @transition;
-     -moz-transition: -moz-transform @transition;
-       -o-transition: -o-transform @transition;
-          transition: transform @transition;
-}
-
-
-// User select
-// For selecting text on the page
-
-.user-select(@select) {
-  -webkit-user-select: @select;
-     -moz-user-select: @select;
-      -ms-user-select: @select; // IE10+
-          user-select: @select;
-}
diff --git a/src/less/bootstrap3/variables.less b/src/less/bootstrap3/variables.less
deleted file mode 100755
index dd3c102a..00000000
--- a/src/less/bootstrap3/variables.less
+++ /dev/null
@@ -1,862 +0,0 @@
-//
-// Variables
-// --------------------------------------------------
-
-
-//== Colors
-//
-//## Gray and brand colors for use across Bootstrap.
-
-@gray-base:              #000;
-@gray-darker:            lighten(@gray-base, 13.5%); // #222
-@gray-dark:              lighten(@gray-base, 20%);   // #333
-@gray:                   lighten(@gray-base, 33.5%); // #555
-@gray-light:             lighten(@gray-base, 46.7%); // #777
-@gray-lighter:           lighten(@gray-base, 93.5%); // #eee
-
-@brand-primary:         darken(#428bca, 6.5%); // #337ab7
-@brand-success:         #5cb85c;
-@brand-info:            #5bc0de;
-@brand-warning:         #f0ad4e;
-@brand-danger:          #d9534f;
-
-
-//== Scaffolding
-//
-//## Settings for some of the most global styles.
-
-//** Background color for `<body>`.
-@body-bg:               #fff;
-//** Global text color on `<body>`.
-@text-color:            @gray-dark;
-
-//** Global textual link color.
-@link-color:            @brand-primary;
-//** Link hover color set via `darken()` function.
-@link-hover-color:      darken(@link-color, 15%);
-//** Link hover decoration.
-@link-hover-decoration: underline;
-
-
-//== Typography
-//
-//## Font, line-height, and color for body text, headings, and more.
-
-@font-family-sans-serif:  "Helvetica Neue", Helvetica, Arial, sans-serif;
-@font-family-serif:       Georgia, "Times New Roman", Times, serif;
-//** Default monospace fonts for `<code>`, `<kbd>`, and `<pre>`.
-@font-family-monospace:   Menlo, Monaco, Consolas, "Courier New", monospace;
-@font-family-base:        @font-family-sans-serif;
-
-@font-size-base:          14px;
-@font-size-large:         ceil((@font-size-base * 1.25)); // ~18px
-@font-size-small:         ceil((@font-size-base * 0.85)); // ~12px
-
-@font-size-h1:            floor((@font-size-base * 2.6)); // ~36px
-@font-size-h2:            floor((@font-size-base * 2.15)); // ~30px
-@font-size-h3:            ceil((@font-size-base * 1.7)); // ~24px
-@font-size-h4:            ceil((@font-size-base * 1.25)); // ~18px
-@font-size-h5:            @font-size-base;
-@font-size-h6:            ceil((@font-size-base * 0.85)); // ~12px
-
-//** Unit-less `line-height` for use in components like buttons.
-@line-height-base:        1.428571429; // 20/14
-//** Computed "line-height" (`font-size` * `line-height`) for use with `margin`, `padding`, etc.
-@line-height-computed:    floor((@font-size-base * @line-height-base)); // ~20px
-
-//** By default, this inherits from the `<body>`.
-@headings-font-family:    inherit;
-@headings-font-weight:    500;
-@headings-line-height:    1.1;
-@headings-color:          inherit;
-
-
-//== Iconography
-//
-//## Specify custom location and filename of the included Glyphicons icon font. Useful for those including Bootstrap via Bower.
-
-//** Load fonts from this directory.
-@icon-font-path:          "../fonts/";
-//** File name for all font files.
-@icon-font-name:          "glyphicons-halflings-regular";
-//** Element ID within SVG icon file.
-@icon-font-svg-id:        "glyphicons_halflingsregular";
-
-
-//== Components
-//
-//## Define common padding and border radius sizes and more. Values based on 14px text and 1.428 line-height (~20px to start).
-
-@padding-base-vertical:     6px;
-@padding-base-horizontal:   12px;
-
-@padding-large-vertical:    10px;
-@padding-large-horizontal:  16px;
-
-@padding-small-vertical:    5px;
-@padding-small-horizontal:  10px;
-
-@padding-xs-vertical:       1px;
-@padding-xs-horizontal:     5px;
-
-@line-height-large:         1.3333333; // extra decimals for Win 8.1 Chrome
-@line-height-small:         1.5;
-
-@border-radius-base:        4px;
-@border-radius-large:       6px;
-@border-radius-small:       3px;
-
-//** Global color for active items (e.g., navs or dropdowns).
-@component-active-color:    #fff;
-//** Global background color for active items (e.g., navs or dropdowns).
-@component-active-bg:       @brand-primary;
-
-//** Width of the `border` for generating carets that indicator dropdowns.
-@caret-width-base:          4px;
-//** Carets increase slightly in size for larger components.
-@caret-width-large:         5px;
-
-
-//== Tables
-//
-//## Customizes the `.table` component with basic values, each used across all table variations.
-
-//** Padding for `<th>`s and `<td>`s.
-@table-cell-padding:            8px;
-//** Padding for cells in `.table-condensed`.
-@table-condensed-cell-padding:  5px;
-
-//** Default background color used for all tables.
-@table-bg:                      transparent;
-//** Background color used for `.table-striped`.
-@table-bg-accent:               #f9f9f9;
-//** Background color used for `.table-hover`.
-@table-bg-hover:                #f5f5f5;
-@table-bg-active:               @table-bg-hover;
-
-//** Border color for table and cell borders.
-@table-border-color:            #ddd;
-
-
-//== Buttons
-//
-//## For each of Bootstrap's buttons, define text, background and border color.
-
-@btn-font-weight:                normal;
-
-@btn-default-color:              #333;
-@btn-default-bg:                 #fff;
-@btn-default-border:             #ccc;
-
-@btn-primary-color:              #fff;
-@btn-primary-bg:                 @brand-primary;
-@btn-primary-border:             darken(@btn-primary-bg, 5%);
-
-@btn-success-color:              #fff;
-@btn-success-bg:                 @brand-success;
-@btn-success-border:             darken(@btn-success-bg, 5%);
-
-@btn-info-color:                 #fff;
-@btn-info-bg:                    @brand-info;
-@btn-info-border:                darken(@btn-info-bg, 5%);
-
-@btn-warning-color:              #fff;
-@btn-warning-bg:                 @brand-warning;
-@btn-warning-border:             darken(@btn-warning-bg, 5%);
-
-@btn-danger-color:               #fff;
-@btn-danger-bg:                  @brand-danger;
-@btn-danger-border:              darken(@btn-danger-bg, 5%);
-
-@btn-link-disabled-color:        @gray-light;
-
-
-//== Forms
-//
-//##
-
-//** `<input>` background color
-@input-bg:                       #fff;
-//** `<input disabled>` background color
-@input-bg-disabled:              @gray-lighter;
-
-//** Text color for `<input>`s
-@input-color:                    @gray;
-//** `<input>` border color
-@input-border:                   #ccc;
-
-// TODO: Rename `@input-border-radius` to `@input-border-radius-base` in v4
-//** Default `.form-control` border radius
-// This has no effect on `<select>`s in some browsers, due to the limited stylability of `<select>`s in CSS.
-@input-border-radius:            @border-radius-base;
-//** Large `.form-control` border radius
-@input-border-radius-large:      @border-radius-large;
-//** Small `.form-control` border radius
-@input-border-radius-small:      @border-radius-small;
-
-//** Border color for inputs on focus
-@input-border-focus:             #66afe9;
-
-//** Placeholder text color
-@input-color-placeholder:        #999;
-
-//** Default `.form-control` height
-@input-height-base:              (@line-height-computed + (@padding-base-vertical * 2) + 2);
-//** Large `.form-control` height
-@input-height-large:             (ceil(@font-size-large * @line-height-large) + (@padding-large-vertical * 2) + 2);
-//** Small `.form-control` height
-@input-height-small:             (floor(@font-size-small * @line-height-small) + (@padding-small-vertical * 2) + 2);
-
-//** `.form-group` margin
-@form-group-margin-bottom:       15px;
-
-@legend-color:                   @gray-dark;
-@legend-border-color:            #e5e5e5;
-
-//** Background color for textual input addons
-@input-group-addon-bg:           @gray-lighter;
-//** Border color for textual input addons
-@input-group-addon-border-color: @input-border;
-
-//** Disabled cursor for form controls and buttons.
-@cursor-disabled:                not-allowed;
-
-
-//== Dropdowns
-//
-//## Dropdown menu container and contents.
-
-//** Background for the dropdown menu.
-@dropdown-bg:                    #fff;
-//** Dropdown menu `border-color`.
-@dropdown-border:                rgba(0,0,0,.15);
-//** Dropdown menu `border-color` **for IE8**.
-@dropdown-fallback-border:       #ccc;
-//** Divider color for between dropdown items.
-@dropdown-divider-bg:            #e5e5e5;
-
-//** Dropdown link text color.
-@dropdown-link-color:            @gray-dark;
-//** Hover color for dropdown links.
-@dropdown-link-hover-color:      darken(@gray-dark, 5%);
-//** Hover background for dropdown links.
-@dropdown-link-hover-bg:         #f5f5f5;
-
-//** Active dropdown menu item text color.
-@dropdown-link-active-color:     @component-active-color;
-//** Active dropdown menu item background color.
-@dropdown-link-active-bg:        @component-active-bg;
-
-//** Disabled dropdown menu item background color.
-@dropdown-link-disabled-color:   @gray-light;
-
-//** Text color for headers within dropdown menus.
-@dropdown-header-color:          @gray-light;
-
-//** Deprecated `@dropdown-caret-color` as of v3.1.0
-@dropdown-caret-color:           #000;
-
-
-//-- Z-index master list
-//
-// Warning: Avoid customizing these values. They're used for a bird's eye view
-// of components dependent on the z-axis and are designed to all work together.
-//
-// Note: These variables are not generated into the Customizer.
-
-@zindex-navbar:            1000;
-@zindex-dropdown:          1000;
-@zindex-popover:           1060;
-@zindex-tooltip:           1070;
-@zindex-navbar-fixed:      1030;
-@zindex-modal-background:  1040;
-@zindex-modal:             1050;
-
-
-//== Media queries breakpoints
-//
-//## Define the breakpoints at which your layout will change, adapting to different screen sizes.
-
-// Extra small screen / phone
-//** Deprecated `@screen-xs` as of v3.0.1
-@screen-xs:                  480px;
-//** Deprecated `@screen-xs-min` as of v3.2.0
-@screen-xs-min:              @screen-xs;
-//** Deprecated `@screen-phone` as of v3.0.1
-@screen-phone:               @screen-xs-min;
-
-// Small screen / tablet
-//** Deprecated `@screen-sm` as of v3.0.1
-@screen-sm:                  768px;
-@screen-sm-min:              @screen-sm;
-//** Deprecated `@screen-tablet` as of v3.0.1
-@screen-tablet:              @screen-sm-min;
-
-// Medium screen / desktop
-//** Deprecated `@screen-md` as of v3.0.1
-@screen-md:                  992px;
-@screen-md-min:              @screen-md;
-//** Deprecated `@screen-desktop` as of v3.0.1
-@screen-desktop:             @screen-md-min;
-
-// Large screen / wide desktop
-//** Deprecated `@screen-lg` as of v3.0.1
-@screen-lg:                  1200px;
-@screen-lg-min:              @screen-lg;
-//** Deprecated `@screen-lg-desktop` as of v3.0.1
-@screen-lg-desktop:          @screen-lg-min;
-
-// So media queries don't overlap when required, provide a maximum
-@screen-xs-max:              (@screen-sm-min - 1);
-@screen-sm-max:              (@screen-md-min - 1);
-@screen-md-max:              (@screen-lg-min - 1);
-
-
-//== Grid system
-//
-//## Define your custom responsive grid.
-
-//** Number of columns in the grid.
-@grid-columns:              12;
-//** Padding between columns. Gets divided in half for the left and right.
-@grid-gutter-width:         30px;
-// Navbar collapse
-//** Point at which the navbar becomes uncollapsed.
-@grid-float-breakpoint:     @screen-sm-min;
-//** Point at which the navbar begins collapsing.
-@grid-float-breakpoint-max: (@grid-float-breakpoint - 1);
-
-
-//== Container sizes
-//
-//## Define the maximum width of `.container` for different screen sizes.
-
-// Small screen / tablet
-@container-tablet:             (720px + @grid-gutter-width);
-//** For `@screen-sm-min` and up.
-@container-sm:                 @container-tablet;
-
-// Medium screen / desktop
-@container-desktop:            (940px + @grid-gutter-width);
-//** For `@screen-md-min` and up.
-@container-md:                 @container-desktop;
-
-// Large screen / wide desktop
-@container-large-desktop:      (1140px + @grid-gutter-width);
-//** For `@screen-lg-min` and up.
-@container-lg:                 @container-large-desktop;
-
-
-//== Navbar
-//
-//##
-
-// Basics of a navbar
-@navbar-height:                    50px;
-@navbar-margin-bottom:             @line-height-computed;
-@navbar-border-radius:             @border-radius-base;
-@navbar-padding-horizontal:        floor((@grid-gutter-width / 2));
-@navbar-padding-vertical:          ((@navbar-height - @line-height-computed) / 2);
-@navbar-collapse-max-height:       340px;
-
-@navbar-default-color:             #777;
-@navbar-default-bg:                #f8f8f8;
-@navbar-default-border:            darken(@navbar-default-bg, 6.5%);
-
-// Navbar links
-@navbar-default-link-color:                #777;
-@navbar-default-link-hover-color:          #333;
-@navbar-default-link-hover-bg:             transparent;
-@navbar-default-link-active-color:         #555;
-@navbar-default-link-active-bg:            darken(@navbar-default-bg, 6.5%);
-@navbar-default-link-disabled-color:       #ccc;
-@navbar-default-link-disabled-bg:          transparent;
-
-// Navbar brand label
-@navbar-default-brand-color:               @navbar-default-link-color;
-@navbar-default-brand-hover-color:         darken(@navbar-default-brand-color, 10%);
-@navbar-default-brand-hover-bg:            transparent;
-
-// Navbar toggle
-@navbar-default-toggle-hover-bg:           #ddd;
-@navbar-default-toggle-icon-bar-bg:        #888;
-@navbar-default-toggle-border-color:       #ddd;
-
-
-// Inverted navbar
-// Reset inverted navbar basics
-@navbar-inverse-color:                      lighten(@gray-light, 15%);
-@navbar-inverse-bg:                         #222;
-@navbar-inverse-border:                     darken(@navbar-inverse-bg, 10%);
-
-// Inverted navbar links
-@navbar-inverse-link-color:                 lighten(@gray-light, 15%);
-@navbar-inverse-link-hover-color:           #fff;
-@navbar-inverse-link-hover-bg:              transparent;
-@navbar-inverse-link-active-color:          @navbar-inverse-link-hover-color;
-@navbar-inverse-link-active-bg:             darken(@navbar-inverse-bg, 10%);
-@navbar-inverse-link-disabled-color:        #444;
-@navbar-inverse-link-disabled-bg:           transparent;
-
-// Inverted navbar brand label
-@navbar-inverse-brand-color:                @navbar-inverse-link-color;
-@navbar-inverse-brand-hover-color:          #fff;
-@navbar-inverse-brand-hover-bg:             transparent;
-
-// Inverted navbar toggle
-@navbar-inverse-toggle-hover-bg:            #333;
-@navbar-inverse-toggle-icon-bar-bg:         #fff;
-@navbar-inverse-toggle-border-color:        #333;
-
-
-//== Navs
-//
-//##
-
-//=== Shared nav styles
-@nav-link-padding:                          10px 15px;
-@nav-link-hover-bg:                         @gray-lighter;
-
-@nav-disabled-link-color:                   @gray-light;
-@nav-disabled-link-hover-color:             @gray-light;
-
-//== Tabs
-@nav-tabs-border-color:                     #ddd;
-
-@nav-tabs-link-hover-border-color:          @gray-lighter;
-
-@nav-tabs-active-link-hover-bg:             @body-bg;
-@nav-tabs-active-link-hover-color:          @gray;
-@nav-tabs-active-link-hover-border-color:   #ddd;
-
-@nav-tabs-justified-link-border-color:            #ddd;
-@nav-tabs-justified-active-link-border-color:     @body-bg;
-
-//== Pills
-@nav-pills-border-radius:                   @border-radius-base;
-@nav-pills-active-link-hover-bg:            @component-active-bg;
-@nav-pills-active-link-hover-color:         @component-active-color;
-
-
-//== Pagination
-//
-//##
-
-@pagination-color:                     @link-color;
-@pagination-bg:                        #fff;
-@pagination-border:                    #ddd;
-
-@pagination-hover-color:               @link-hover-color;
-@pagination-hover-bg:                  @gray-lighter;
-@pagination-hover-border:              #ddd;
-
-@pagination-active-color:              #fff;
-@pagination-active-bg:                 @brand-primary;
-@pagination-active-border:             @brand-primary;
-
-@pagination-disabled-color:            @gray-light;
-@pagination-disabled-bg:               #fff;
-@pagination-disabled-border:           #ddd;
-
-
-//== Pager
-//
-//##
-
-@pager-bg:                             @pagination-bg;
-@pager-border:                         @pagination-border;
-@pager-border-radius:                  15px;
-
-@pager-hover-bg:                       @pagination-hover-bg;
-
-@pager-active-bg:                      @pagination-active-bg;
-@pager-active-color:                   @pagination-active-color;
-
-@pager-disabled-color:                 @pagination-disabled-color;
-
-
-//== Jumbotron
-//
-//##
-
-@jumbotron-padding:              30px;
-@jumbotron-color:                inherit;
-@jumbotron-bg:                   @gray-lighter;
-@jumbotron-heading-color:        inherit;
-@jumbotron-font-size:            ceil((@font-size-base * 1.5));
-@jumbotron-heading-font-size:    ceil((@font-size-base * 4.5));
-
-
-//== Form states and alerts
-//
-//## Define colors for form feedback states and, by default, alerts.
-
-@state-success-text:             #3c763d;
-@state-success-bg:               #dff0d8;
-@state-success-border:           darken(spin(@state-success-bg, -10), 5%);
-
-@state-info-text:                #31708f;
-@state-info-bg:                  #d9edf7;
-@state-info-border:              darken(spin(@state-info-bg, -10), 7%);
-
-@state-warning-text:             #8a6d3b;
-@state-warning-bg:               #fcf8e3;
-@state-warning-border:           darken(spin(@state-warning-bg, -10), 5%);
-
-@state-danger-text:              #a94442;
-@state-danger-bg:                #f2dede;
-@state-danger-border:            darken(spin(@state-danger-bg, -10), 5%);
-
-
-//== Tooltips
-//
-//##
-
-//** Tooltip max width
-@tooltip-max-width:           200px;
-//** Tooltip text color
-@tooltip-color:               #fff;
-//** Tooltip background color
-@tooltip-bg:                  #000;
-@tooltip-opacity:             .9;
-
-//** Tooltip arrow width
-@tooltip-arrow-width:         5px;
-//** Tooltip arrow color
-@tooltip-arrow-color:         @tooltip-bg;
-
-
-//== Popovers
-//
-//##
-
-//** Popover body background color
-@popover-bg:                          #fff;
-//** Popover maximum width
-@popover-max-width:                   276px;
-//** Popover border color
-@popover-border-color:                rgba(0,0,0,.2);
-//** Popover fallback border color
-@popover-fallback-border-color:       #ccc;
-
-//** Popover title background color
-@popover-title-bg:                    darken(@popover-bg, 3%);
-
-//** Popover arrow width
-@popover-arrow-width:                 10px;
-//** Popover arrow color
-@popover-arrow-color:                 @popover-bg;
-
-//** Popover outer arrow width
-@popover-arrow-outer-width:           (@popover-arrow-width + 1);
-//** Popover outer arrow color
-@popover-arrow-outer-color:           fadein(@popover-border-color, 5%);
-//** Popover outer arrow fallback color
-@popover-arrow-outer-fallback-color:  darken(@popover-fallback-border-color, 20%);
-
-
-//== Labels
-//
-//##
-
-//** Default label background color
-@label-default-bg:            @gray-light;
-//** Primary label background color
-@label-primary-bg:            @brand-primary;
-//** Success label background color
-@label-success-bg:            @brand-success;
-//** Info label background color
-@label-info-bg:               @brand-info;
-//** Warning label background color
-@label-warning-bg:            @brand-warning;
-//** Danger label background color
-@label-danger-bg:             @brand-danger;
-
-//** Default label text color
-@label-color:                 #fff;
-//** Default text color of a linked label
-@label-link-hover-color:      #fff;
-
-
-//== Modals
-//
-//##
-
-//** Padding applied to the modal body
-@modal-inner-padding:         15px;
-
-//** Padding applied to the modal title
-@modal-title-padding:         15px;
-//** Modal title line-height
-@modal-title-line-height:     @line-height-base;
-
-//** Background color of modal content area
-@modal-content-bg:                             #fff;
-//** Modal content border color
-@modal-content-border-color:                   rgba(0,0,0,.2);
-//** Modal content border color **for IE8**
-@modal-content-fallback-border-color:          #999;
-
-//** Modal backdrop background color
-@modal-backdrop-bg:           #000;
-//** Modal backdrop opacity
-@modal-backdrop-opacity:      .5;
-//** Modal header border color
-@modal-header-border-color:   #e5e5e5;
-//** Modal footer border color
-@modal-footer-border-color:   @modal-header-border-color;
-
-@modal-lg:                    900px;
-@modal-md:                    600px;
-@modal-sm:                    300px;
-
-
-//== Alerts
-//
-//## Define alert colors, border radius, and padding.
-
-@alert-padding:               15px;
-@alert-border-radius:         @border-radius-base;
-@alert-link-font-weight:      bold;
-
-@alert-success-bg:            @state-success-bg;
-@alert-success-text:          @state-success-text;
-@alert-success-border:        @state-success-border;
-
-@alert-info-bg:               @state-info-bg;
-@alert-info-text:             @state-info-text;
-@alert-info-border:           @state-info-border;
-
-@alert-warning-bg:            @state-warning-bg;
-@alert-warning-text:          @state-warning-text;
-@alert-warning-border:        @state-warning-border;
-
-@alert-danger-bg:             @state-danger-bg;
-@alert-danger-text:           @state-danger-text;
-@alert-danger-border:         @state-danger-border;
-
-
-//== Progress bars
-//
-//##
-
-//** Background color of the whole progress component
-@progress-bg:                 #f5f5f5;
-//** Progress bar text color
-@progress-bar-color:          #fff;
-//** Variable for setting rounded corners on progress bar.
-@progress-border-radius:      @border-radius-base;
-
-//** Default progress bar color
-@progress-bar-bg:             @brand-primary;
-//** Success progress bar color
-@progress-bar-success-bg:     @brand-success;
-//** Warning progress bar color
-@progress-bar-warning-bg:     @brand-warning;
-//** Danger progress bar color
-@progress-bar-danger-bg:      @brand-danger;
-//** Info progress bar color
-@progress-bar-info-bg:        @brand-info;
-
-
-//== List group
-//
-//##
-
-//** Background color on `.list-group-item`
-@list-group-bg:                 #fff;
-//** `.list-group-item` border color
-@list-group-border:             #ddd;
-//** List group border radius
-@list-group-border-radius:      @border-radius-base;
-
-//** Background color of single list items on hover
-@list-group-hover-bg:           #f5f5f5;
-//** Text color of active list items
-@list-group-active-color:       @component-active-color;
-//** Background color of active list items
-@list-group-active-bg:          @component-active-bg;
-//** Border color of active list elements
-@list-group-active-border:      @list-group-active-bg;
-//** Text color for content within active list items
-@list-group-active-text-color:  lighten(@list-group-active-bg, 40%);
-
-//** Text color of disabled list items
-@list-group-disabled-color:      @gray-light;
-//** Background color of disabled list items
-@list-group-disabled-bg:         @gray-lighter;
-//** Text color for content within disabled list items
-@list-group-disabled-text-color: @list-group-disabled-color;
-
-@list-group-link-color:         #555;
-@list-group-link-hover-color:   @list-group-link-color;
-@list-group-link-heading-color: #333;
-
-
-//== Panels
-//
-//##
-
-@panel-bg:                    #fff;
-@panel-body-padding:          15px;
-@panel-heading-padding:       10px 15px;
-@panel-footer-padding:        @panel-heading-padding;
-@panel-border-radius:         @border-radius-base;
-
-//** Border color for elements within panels
-@panel-inner-border:          #ddd;
-@panel-footer-bg:             #f5f5f5;
-
-@panel-default-text:          @gray-dark;
-@panel-default-border:        #ddd;
-@panel-default-heading-bg:    #f5f5f5;
-
-@panel-primary-text:          #fff;
-@panel-primary-border:        @brand-primary;
-@panel-primary-heading-bg:    @brand-primary;
-
-@panel-success-text:          @state-success-text;
-@panel-success-border:        @state-success-border;
-@panel-success-heading-bg:    @state-success-bg;
-
-@panel-info-text:             @state-info-text;
-@panel-info-border:           @state-info-border;
-@panel-info-heading-bg:       @state-info-bg;
-
-@panel-warning-text:          @state-warning-text;
-@panel-warning-border:        @state-warning-border;
-@panel-warning-heading-bg:    @state-warning-bg;
-
-@panel-danger-text:           @state-danger-text;
-@panel-danger-border:         @state-danger-border;
-@panel-danger-heading-bg:     @state-danger-bg;
-
-
-//== Thumbnails
-//
-//##
-
-//** Padding around the thumbnail image
-@thumbnail-padding:           4px;
-//** Thumbnail background color
-@thumbnail-bg:                @body-bg;
-//** Thumbnail border color
-@thumbnail-border:            #ddd;
-//** Thumbnail border radius
-@thumbnail-border-radius:     @border-radius-base;
-
-//** Custom text color for thumbnail captions
-@thumbnail-caption-color:     @text-color;
-//** Padding around the thumbnail caption
-@thumbnail-caption-padding:   9px;
-
-
-//== Wells
-//
-//##
-
-@well-bg:                     #f5f5f5;
-@well-border:                 darken(@well-bg, 7%);
-
-
-//== Badges
-//
-//##
-
-@badge-color:                 #fff;
-//** Linked badge text color on hover
-@badge-link-hover-color:      #fff;
-@badge-bg:                    @gray-light;
-
-//** Badge text color in active nav link
-@badge-active-color:          @link-color;
-//** Badge background color in active nav link
-@badge-active-bg:             #fff;
-
-@badge-font-weight:           bold;
-@badge-line-height:           1;
-@badge-border-radius:         10px;
-
-
-//== Breadcrumbs
-//
-//##
-
-@breadcrumb-padding-vertical:   8px;
-@breadcrumb-padding-horizontal: 15px;
-//** Breadcrumb background color
-@breadcrumb-bg:                 #f5f5f5;
-//** Breadcrumb text color
-@breadcrumb-color:              #ccc;
-//** Text color of current page in the breadcrumb
-@breadcrumb-active-color:       @gray-light;
-//** Textual separator for between breadcrumb elements
-@breadcrumb-separator:          "/";
-
-
-//== Carousel
-//
-//##
-
-@carousel-text-shadow:                        0 1px 2px rgba(0,0,0,.6);
-
-@carousel-control-color:                      #fff;
-@carousel-control-width:                      15%;
-@carousel-control-opacity:                    .5;
-@carousel-control-font-size:                  20px;
-
-@carousel-indicator-active-bg:                #fff;
-@carousel-indicator-border-color:             #fff;
-
-@carousel-caption-color:                      #fff;
-
-
-//== Close
-//
-//##
-
-@close-font-weight:           bold;
-@close-color:                 #000;
-@close-text-shadow:           0 1px 0 #fff;
-
-
-//== Code
-//
-//##
-
-@code-color:                  #c7254e;
-@code-bg:                     #f9f2f4;
-
-@kbd-color:                   #fff;
-@kbd-bg:                      #333;
-
-@pre-bg:                      #f5f5f5;
-@pre-color:                   @gray-dark;
-@pre-border-color:            #ccc;
-@pre-scrollable-max-height:   340px;
-
-
-//== Type
-//
-//##
-
-//** Horizontal offset for forms and lists.
-@component-offset-horizontal: 180px;
-//** Text muted color
-@text-muted:                  @gray-light;
-//** Abbreviations and acronyms border color
-@abbr-border-color:           @gray-light;
-//** Headings small color
-@headings-small-color:        @gray-light;
-//** Blockquote small color
-@blockquote-small-color:      @gray-light;
-//** Blockquote font size
-@blockquote-font-size:        (@font-size-base * 1.25);
-//** Blockquote border color
-@blockquote-border-color:     @gray-lighter;
-//** Page header border color
-@page-header-border-color:    @gray-lighter;
-//** Width of horizontal description list titles
-@dl-horizontal-offset:        @component-offset-horizontal;
-//** Horizontal line color.
-@hr-border:                   @gray-lighter;
diff --git a/src/scss/_mixins.scss b/src/scss/_mixins.scss
new file mode 100644
index 00000000..642a4dab
--- /dev/null
+++ b/src/scss/_mixins.scss
@@ -0,0 +1,19 @@
+@mixin box-shadow($shadow...) {
+  @if $enable-shadows {
+    box-shadow: $shadow;
+  }
+}
+
+@mixin transition($transition...) {
+  @if $enable-transitions {
+    @if length($transition) == 0 {
+      transition: $transition-base;
+    } @else {
+      transition: $transition;
+    }
+  }
+}
+
+@import "mixins/hover";
+@import "mixins/buttons";
+@import "mixins/border-radius";
diff --git a/src/scss/_variables.scss b/src/scss/_variables.scss
new file mode 100644
index 00000000..5b7ceaf2
--- /dev/null
+++ b/src/scss/_variables.scss
@@ -0,0 +1,936 @@
+// Variables
+//
+// Copy settings from this file into the provided `_custom.scss` to override
+// the Bootstrap defaults without modifying key, versioned files.
+
+
+// Table of Contents
+//
+// Colors
+// Options
+// Spacing
+// Body
+// Links
+// Grid breakpoints
+// Grid containers
+// Grid columns
+// Fonts
+// Components
+// Tables
+// Buttons
+// Forms
+// Dropdowns
+// Z-index master list
+// Navbar
+// Navs
+// Pagination
+// Jumbotron
+// Form states and alerts
+// Cards
+// Tooltips
+// Popovers
+// Badges
+// Modals
+// Alerts
+// Progress bars
+// List group
+// Image thumbnails
+// Figures
+// Breadcrumbs
+// Carousel
+// Close
+// Code
+
+@mixin _assert-ascending($map, $map-name) {
+  $prev-key: null;
+  $prev-num: null;
+  @each $key, $num in $map {
+    @if $prev-num == null {
+      // Do nothing
+    } @else if not comparable($prev-num, $num) {
+      @warn "Potentially invalid value for #{$map-name}: This map must be in ascending order, but key '#{$key}' has value #{$num} whose unit makes it incomparable to #{$prev-num}, the value of the previous key '#{$prev-key}' !";
+    } @else if $prev-num >= $num {
+      @warn "Invalid value for #{$map-name}: This map must be in ascending order, but key '#{$key}' has value #{$num} which isn't greater than #{$prev-num}, the value of the previous key '#{$prev-key}' !";
+    }
+    $prev-key: $key;
+    $prev-num: $num;
+  }
+}
+
+// Replace `$search` with `$replace` in `$string`
+// @author Hugo Giraudel
+// @param {String} $string - Initial string
+// @param {String} $search - Substring to replace
+// @param {String} $replace ('') - New value
+// @return {String} - Updated string
+@function str-replace($string, $search, $replace: "") {
+  $index: str-index($string, $search);
+
+  @if $index {
+    @return str-slice($string, 1, $index - 1) + $replace + str-replace(str-slice($string, $index + str-length($search)), $search, $replace);
+  }
+
+  @return $string;
+}
+
+@mixin _assert-starts-at-zero($map) {
+  $values: map-values($map);
+  $first-value: nth($values, 1);
+  @if $first-value != 0 {
+    @warn "First breakpoint in `$grid-breakpoints` must start at 0, but starts at #{$first-value}.";
+  }
+}
+
+
+// General variable structure
+//
+// Variable format should follow the `$component-modifier-state-property` order.
+
+
+// Colors
+//
+// Grayscale and brand colors for use across Bootstrap.
+
+// Start with assigning color names to specific hex values.
+$white:  #fff !default;
+$black:  #000 !default;
+$red:    #d9534f !default;
+$orange: #f0ad4e !default;
+$yellow: #ffd500 !default;
+$green:  #5cb85c !default;
+$blue:   #0275d8 !default;
+$teal:   #5bc0de !default;
+$pink:   #ff5b77 !default;
+$purple: #613d7c !default;
+
+// Create grayscale
+$gray-dark:                 #292b2c !default;
+$gray:                      #464a4c !default;
+$gray-light:                #636c72 !default;
+$gray-lighter:              #eceeef !default;
+$gray-lightest:             #f7f7f9 !default;
+
+// Reassign color vars to semantic color scheme
+$brand-primary:             $blue !default;
+$brand-success:             $green !default;
+$brand-info:                $teal !default;
+$brand-warning:             $orange !default;
+$brand-danger:              $red !default;
+$brand-inverse:             $gray-dark !default;
+
+
+// Options
+//
+// Quickly modify global styling by enabling or disabling optional features.
+
+$enable-rounded:            true !default;
+$enable-shadows:            false !default;
+$enable-gradients:          false !default;
+$enable-transitions:        true !default;
+$enable-hover-media-query:  false !default;
+$enable-grid-classes:       true !default;
+$enable-print-styles:       true !default;
+
+
+// Spacing
+//
+// Control the default styling of most Bootstrap elements by modifying these
+// variables. Mostly focused on spacing.
+// You can add more entries to the $spacers map, should you need more variation.
+
+$spacer:   1rem !default;
+$spacer-x: $spacer !default;
+$spacer-y: $spacer !default;
+$spacers: (
+  0: (
+    x: 0,
+    y: 0
+  ),
+  1: (
+    x: ($spacer-x * .25),
+    y: ($spacer-y * .25)
+  ),
+  2: (
+    x: ($spacer-x * .5),
+    y: ($spacer-y * .5)
+  ),
+  3: (
+    x: $spacer-x,
+    y: $spacer-y
+  ),
+  4: (
+    x: ($spacer-x * 1.5),
+    y: ($spacer-y * 1.5)
+  ),
+  5: (
+    x: ($spacer-x * 3),
+    y: ($spacer-y * 3)
+  )
+) !default;
+$border-width: 1px !default;
+
+// This variable affects the `.h-*` and `.w-*` classes.
+$sizes: (
+  25: 25%,
+  50: 50%,
+  75: 75%,
+  100: 100%
+) !default;
+
+// Body
+//
+// Settings for the `<body>` element.
+
+$body-bg:       $white !default;
+$body-color:    $gray-dark !default;
+
+// Links
+//
+// Style anchor elements.
+
+$link-color:            $brand-primary !default;
+$link-decoration:       none !default;
+$link-hover-color:      darken($link-color, 15%) !default;
+$link-hover-decoration: underline !default;
+
+
+// Grid breakpoints
+//
+// Define the minimum dimensions at which your layout will change,
+// adapting to different screen sizes, for use in media queries.
+
+$grid-breakpoints: (
+  xs: 0,
+  sm: 576px,
+  md: 768px,
+  lg: 992px,
+  xl: 1200px
+) !default;
+@include _assert-ascending($grid-breakpoints, "$grid-breakpoints");
+@include _assert-starts-at-zero($grid-breakpoints);
+
+
+// Grid containers
+//
+// Define the maximum width of `.container` for different screen sizes.
+
+$container-max-widths: (
+  sm: 540px,
+  md: 720px,
+  lg: 960px,
+  xl: 1140px
+) !default;
+@include _assert-ascending($container-max-widths, "$container-max-widths");
+
+
+// Grid columns
+//
+// Set the number of columns and specify the width of the gutters.
+
+$grid-columns:               12 !default;
+$grid-gutter-width-base:     30px !default;
+$grid-gutter-widths: (
+  xs: $grid-gutter-width-base,
+  sm: $grid-gutter-width-base,
+  md: $grid-gutter-width-base,
+  lg: $grid-gutter-width-base,
+  xl: $grid-gutter-width-base
+) !default;
+
+// Fonts
+//
+// Font, line-height, and color for body text, headings, and more.
+
+$font-family-sans-serif: -apple-system, system-ui, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif !default;
+$font-family-monospace:  Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace !default;
+$font-family-base:       $font-family-sans-serif !default;
+
+$font-size-base: 1rem !default; // Assumes the browser default, typically `16px`
+$font-size-lg:   1.25rem !default;
+$font-size-sm:   .875rem !default;
+$font-size-xs:   .75rem !default;
+
+$font-weight-normal: normal !default;
+$font-weight-bold: bold !default;
+
+$font-weight-base: $font-weight-normal !default;
+$line-height-base: 1.5 !default;
+
+$font-size-h1: 2.5rem !default;
+$font-size-h2: 2rem !default;
+$font-size-h3: 1.75rem !default;
+$font-size-h4: 1.5rem !default;
+$font-size-h5: 1.25rem !default;
+$font-size-h6: 1rem !default;
+
+$headings-margin-bottom: ($spacer / 2) !default;
+$headings-font-family:   inherit !default;
+$headings-font-weight:   500 !default;
+$headings-line-height:   1.1 !default;
+$headings-color:         inherit !default;
+
+$display1-size: 6rem !default;
+$display2-size: 5.5rem !default;
+$display3-size: 4.5rem !default;
+$display4-size: 3.5rem !default;
+
+$display1-weight:     300 !default;
+$display2-weight:     300 !default;
+$display3-weight:     300 !default;
+$display4-weight:     300 !default;
+$display-line-height: $headings-line-height !default;
+
+$lead-font-size:   1.25rem !default;
+$lead-font-weight: 300 !default;
+
+$small-font-size: 80% !default;
+
+$text-muted: $gray-light !default;
+
+$blockquote-small-color:  $gray-light !default;
+$blockquote-font-size:    ($font-size-base * 1.25) !default;
+$blockquote-border-color: $gray-lighter !default;
+$blockquote-border-width: .25rem !default;
+
+$hr-border-color: rgba($black,.1) !default;
+$hr-border-width: $border-width !default;
+
+$mark-padding: .2em !default;
+
+$dt-font-weight: $font-weight-bold !default;
+
+$kbd-box-shadow:         inset 0 -.1rem 0 rgba($black,.25) !default;
+$nested-kbd-font-weight: $font-weight-bold !default;
+
+$list-inline-padding: 5px !default;
+
+
+// Components
+//
+// Define common padding and border radius sizes and more.
+
+$line-height-lg:         (4 / 3) !default;
+$line-height-sm:         1.5 !default;
+
+$border-radius:          .25rem !default;
+$border-radius-lg:       .3rem !default;
+$border-radius-sm:       .2rem !default;
+
+$component-active-color: $white !default;
+$component-active-bg:    $brand-primary !default;
+
+$caret-width:            .3em !default;
+
+$transition-base:        all .2s ease-in-out !default;
+$transition-fade:        opacity .15s linear !default;
+$transition-collapse:    height .35s ease !default;
+
+
+// Tables
+//
+// Customizes the `.table` component with basic values, each used across all table variations.
+
+$table-cell-padding:            .75rem !default;
+$table-sm-cell-padding:         .3rem !default;
+
+$table-bg:                      transparent !default;
+
+$table-inverse-bg:              $gray-dark !default;
+$table-inverse-color:           $body-bg !default;
+
+$table-bg-accent:               rgba($black,.05) !default;
+$table-bg-hover:                rgba($black,.075) !default;
+$table-bg-active:               $table-bg-hover !default;
+
+$table-head-bg:                 $gray-lighter !default;
+$table-head-color:              $gray !default;
+
+$table-border-width:            $border-width !default;
+$table-border-color:            $gray-lighter !default;
+
+
+// Buttons
+//
+// For each of Bootstrap's buttons, define text, background and border color.
+
+$btn-padding-x:                  1rem !default;
+$btn-padding-y:                  .5rem !default;
+$btn-line-height:                1.25 !default;
+$btn-font-weight:                $font-weight-normal !default;
+$btn-box-shadow:                 inset 0 1px 0 rgba($white,.15), 0 1px 1px rgba($black,.075) !default;
+$btn-focus-box-shadow:           0 0 0 2px rgba($brand-primary, .25) !default;
+$btn-active-box-shadow:          inset 0 3px 5px rgba($black,.125) !default;
+
+$btn-primary-color:              $white !default;
+$btn-primary-bg:                 $brand-primary !default;
+$btn-primary-border:             $btn-primary-bg !default;
+
+$btn-secondary-color:            $gray-dark !default;
+$btn-secondary-bg:               $white !default;
+$btn-secondary-border:           #ccc !default;
+
+$btn-info-color:                 $white !default;
+$btn-info-bg:                    $brand-info !default;
+$btn-info-border:                $btn-info-bg !default;
+
+$btn-success-color:              $white !default;
+$btn-success-bg:                 $brand-success !default;
+$btn-success-border:             $btn-success-bg !default;
+
+$btn-warning-color:              $white !default;
+$btn-warning-bg:                 $brand-warning !default;
+$btn-warning-border:             $btn-warning-bg !default;
+
+$btn-danger-color:               $white !default;
+$btn-danger-bg:                  $brand-danger !default;
+$btn-danger-border:              $btn-danger-bg !default;
+
+$btn-link-disabled-color:        $gray-light !default;
+
+$btn-padding-x-sm:               .5rem !default;
+$btn-padding-y-sm:               .25rem !default;
+
+$btn-padding-x-lg:               1.5rem !default;
+$btn-padding-y-lg:               .75rem !default;
+
+$btn-block-spacing-y:            .5rem !default;
+
+// Allows for customizing button radius independently from global border radius
+$btn-border-radius:              $border-radius !default;
+$btn-border-radius-lg:           $border-radius-lg !default;
+$btn-border-radius-sm:           $border-radius-sm !default;
+
+$btn-transition:                 all .2s ease-in-out !default;
+
+
+// Forms
+
+$input-padding-x:                .75rem !default;
+$input-padding-y:                .5rem !default;
+$input-line-height:              1.25 !default;
+
+$input-bg:                       $white !default;
+$input-bg-disabled:              $gray-lighter !default;
+
+$input-color:                    $gray !default;
+$input-border-color:             rgba($black,.15) !default;
+$input-btn-border-width:         $border-width !default; // For form controls and buttons
+$input-box-shadow:               inset 0 1px 1px rgba($black,.075) !default;
+
+$input-border-radius:            $border-radius !default;
+$input-border-radius-lg:         $border-radius-lg !default;
+$input-border-radius-sm:         $border-radius-sm !default;
+
+$input-bg-focus:                 $input-bg !default;
+$input-border-focus:             lighten($brand-primary, 25%) !default;
+$input-box-shadow-focus:         $input-box-shadow, rgba($input-border-focus, .6) !default;
+$input-color-focus:              $input-color !default;
+
+$input-color-placeholder:        $gray-light !default;
+
+$input-padding-x-sm:             .5rem !default;
+$input-padding-y-sm:             .25rem !default;
+
+$input-padding-x-lg:             1.5rem !default;
+$input-padding-y-lg:             .75rem !default;
+
+$input-height:                   (($font-size-base * $input-line-height) + ($input-padding-y * 2)) !default;
+$input-height-lg:                (($font-size-lg * $line-height-lg) + ($input-padding-y-lg * 2)) !default;
+$input-height-sm:                (($font-size-sm * $line-height-sm) + ($input-padding-y-sm * 2)) !default;
+
+$input-transition:               border-color ease-in-out .15s, box-shadow ease-in-out .15s !default;
+
+$form-text-margin-top:     .25rem !default;
+$form-feedback-margin-top: $form-text-margin-top !default;
+
+$form-check-margin-bottom:  .5rem !default;
+$form-check-input-gutter:   1.25rem !default;
+$form-check-input-margin-y: .25rem !default;
+$form-check-input-margin-x: .25rem !default;
+
+$form-check-inline-margin-x: .75rem !default;
+
+$form-group-margin-bottom:       $spacer-y !default;
+
+$input-group-addon-bg:           $gray-lighter !default;
+$input-group-addon-border-color: $input-border-color !default;
+
+$cursor-disabled:                not-allowed !default;
+
+$custom-control-gutter:   1.5rem !default;
+$custom-control-spacer-x: 1rem !default;
+$custom-control-spacer-y: .25rem !default;
+
+$custom-control-indicator-size:       1rem !default;
+$custom-control-indicator-bg:         #ddd !default;
+$custom-control-indicator-bg-size:    50% 50% !default;
+$custom-control-indicator-box-shadow: inset 0 .25rem .25rem rgba($black,.1) !default;
+
+$custom-control-disabled-cursor:             $cursor-disabled !default;
+$custom-control-disabled-indicator-bg:       $gray-lighter !default;
+$custom-control-disabled-description-color:  $gray-light !default;
+
+$custom-control-checked-indicator-color:      $white !default;
+$custom-control-checked-indicator-bg:         $brand-primary !default;
+$custom-control-checked-indicator-box-shadow: none !default;
+
+$custom-control-focus-indicator-box-shadow: 0 0 0 1px $body-bg, 0 0 0 3px $brand-primary !default;
+
+$custom-control-active-indicator-color:      $white !default;
+$custom-control-active-indicator-bg:         lighten($brand-primary, 35%) !default;
+$custom-control-active-indicator-box-shadow: none !default;
+
+$custom-checkbox-radius: $border-radius !default;
+$custom-checkbox-checked-icon: str-replace(url("data:image/svg+xml;charset=utf8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 8 8'%3E%3Cpath fill='#{$custom-control-checked-indicator-color}' d='M6.564.75l-3.59 3.612-1.538-1.55L0 4.26 2.974 7.25 8 2.193z'/%3E%3C/svg%3E"), "#", "%23") !default;
+
+$custom-checkbox-indeterminate-bg: $brand-primary !default;
+$custom-checkbox-indeterminate-indicator-color: $custom-control-checked-indicator-color !default;
+$custom-checkbox-indeterminate-icon: str-replace(url("data:image/svg+xml;charset=utf8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 4 4'%3E%3Cpath stroke='#{$custom-checkbox-indeterminate-indicator-color}' d='M0 2h4'/%3E%3C/svg%3E"), "#", "%23") !default;
+$custom-checkbox-indeterminate-box-shadow: none !default;
+
+$custom-radio-radius: 50% !default;
+$custom-radio-checked-icon: str-replace(url("data:image/svg+xml;charset=utf8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='-4 -4 8 8'%3E%3Ccircle r='3' fill='#{$custom-control-checked-indicator-color}'/%3E%3C/svg%3E"), "#", "%23") !default;
+
+$custom-select-padding-x:          .75rem  !default;
+$custom-select-padding-y:          .375rem !default;
+$custom-select-indicator-padding:   1rem !default; // Extra padding to account for the presence of the background-image based indicator
+$custom-select-line-height:         $input-line-height !default;
+$custom-select-color:               $input-color !default;
+$custom-select-disabled-color:      $gray-light !default;
+$custom-select-bg:            $white !default;
+$custom-select-disabled-bg:   $gray-lighter !default;
+$custom-select-bg-size:       8px 10px !default; // In pixels because image dimensions
+$custom-select-indicator-color: #333 !default;
+$custom-select-indicator:     str-replace(url("data:image/svg+xml;charset=utf8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 4 5'%3E%3Cpath fill='#{$custom-select-indicator-color}' d='M2 0L0 2h4zm0 5L0 3h4z'/%3E%3C/svg%3E"), "#", "%23") !default;
+$custom-select-border-width:  $input-btn-border-width !default;
+$custom-select-border-color:  $input-border-color !default;
+$custom-select-border-radius: $border-radius !default;
+
+$custom-select-focus-border-color: lighten($brand-primary, 25%) !default;
+$custom-select-focus-box-shadow:   inset 0 1px 2px rgba($black, .075), 0 0 5px rgba($custom-select-focus-border-color, .5) !default;
+
+$custom-select-sm-font-size:  75% !default;
+
+$custom-file-height:           2.5rem !default;
+$custom-file-width:            14rem !default;
+$custom-file-focus-box-shadow: 0 0 0 .075rem $white, 0 0 0 .2rem $brand-primary !default;
+
+$custom-file-padding-x:     .5rem !default;
+$custom-file-padding-y:     1rem !default;
+$custom-file-line-height:   1.5 !default;
+$custom-file-color:         $gray !default;
+$custom-file-bg:            $white !default;
+$custom-file-border-width:  $border-width !default;
+$custom-file-border-color:  $input-border-color !default;
+$custom-file-border-radius: $border-radius !default;
+$custom-file-box-shadow:    inset 0 .2rem .4rem rgba($black,.05) !default;
+$custom-file-button-color:  $custom-file-color !default;
+$custom-file-button-bg:     $gray-lighter !default;
+$custom-file-text: (
+  placeholder: (
+    en: "Choose file..."
+  ),
+  button-label: (
+    en: "Browse"
+  )
+) !default;
+
+
+// Form validation icons
+$form-icon-success-color: $brand-success !default;
+$form-icon-success: str-replace(url("data:image/svg+xml;charset=utf8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 8 8'%3E%3Cpath fill='#{$form-icon-success-color}' d='M2.3 6.73L.6 4.53c-.4-1.04.46-1.4 1.1-.8l1.1 1.4 3.4-3.8c.6-.63 1.6-.27 1.2.7l-4 4.6c-.43.5-.8.4-1.1.1z'/%3E%3C/svg%3E"), "#", "%23") !default;
+
+$form-icon-warning-color: $brand-warning !default;
+$form-icon-warning: str-replace(url("data:image/svg+xml;charset=utf8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 8 8'%3E%3Cpath fill='#{$form-icon-warning-color}' d='M4.4 5.324h-.8v-2.46h.8zm0 1.42h-.8V5.89h.8zM3.76.63L.04 7.075c-.115.2.016.425.26.426h7.397c.242 0 .372-.226.258-.426C6.726 4.924 5.47 2.79 4.253.63c-.113-.174-.39-.174-.494 0z'/%3E%3C/svg%3E"), "#", "%23") !default;
+
+$form-icon-danger-color: $brand-danger !default;
+$form-icon-danger: str-replace(url("data:image/svg+xml;charset=utf8,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='#{$form-icon-danger-color}' viewBox='-2 -2 7 7'%3E%3Cpath stroke='#{$form-icon-danger-color}' d='M0 0l3 3m0-3L0 3'/%3E%3Ccircle r='.5'/%3E%3Ccircle cx='3' r='.5'/%3E%3Ccircle cy='3' r='.5'/%3E%3Ccircle cx='3' cy='3' r='.5'/%3E%3C/svg%3E"), "#", "%23") !default;
+
+
+// Dropdowns
+//
+// Dropdown menu container and contents.
+
+$dropdown-min-width:             10rem !default;
+$dropdown-padding-y:             .5rem !default;
+$dropdown-margin-top:            .125rem !default;
+$dropdown-bg:                    $white !default;
+$dropdown-border-color:          rgba($black,.15) !default;
+$dropdown-border-width:          $border-width !default;
+$dropdown-divider-bg:            $gray-lighter !default;
+$dropdown-box-shadow:            0 .5rem 1rem rgba($black,.175) !default;
+
+$dropdown-link-color:            $gray-dark !default;
+$dropdown-link-hover-color:      darken($gray-dark, 5%) !default;
+$dropdown-link-hover-bg:         $gray-lightest !default;
+
+$dropdown-link-active-color:     $component-active-color !default;
+$dropdown-link-active-bg:        $component-active-bg !default;
+
+$dropdown-link-disabled-color:   $gray-light !default;
+
+$dropdown-item-padding-x:        1.5rem !default;
+
+$dropdown-header-color:          $gray-light !default;
+
+
+// Z-index master list
+//
+// Warning: Avoid customizing these values. They're used for a bird's eye view
+// of components dependent on the z-axis and are designed to all work together.
+
+$zindex-dropdown-backdrop:  990 !default;
+$zindex-dropdown:           1000 !default;
+$zindex-fixed:              1030 !default;
+$zindex-sticky:             1030 !default;
+$zindex-modal-backdrop:     1040 !default;
+$zindex-modal:              1050 !default;
+$zindex-popover:            1060 !default;
+$zindex-tooltip:            1070 !default;
+
+// Navbar
+
+$navbar-padding-x:                  $spacer !default;
+$navbar-padding-y:                  ($spacer / 2) !default;
+
+$navbar-toggler-padding-x:           .75rem !default;
+$navbar-toggler-padding-y:           .25rem !default;
+$navbar-toggler-font-size:           $font-size-lg !default;
+$navbar-toggler-border-radius:       $btn-border-radius !default;
+
+$navbar-inverse-color:                 rgba($white,.5) !default;
+$navbar-inverse-hover-color:           rgba($white,.75) !default;
+$navbar-inverse-active-color:          rgba($white,1) !default;
+$navbar-inverse-disabled-color:        rgba($white,.25) !default;
+$navbar-inverse-toggler-bg: str-replace(url("data:image/svg+xml;charset=utf8,%3Csvg viewBox='0 0 30 30' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath stroke='#{$navbar-inverse-color}' stroke-width='2' stroke-linecap='round' stroke-miterlimit='10' d='M4 7h22M4 15h22M4 23h22'/%3E%3C/svg%3E"), "#", "%23") !default;
+$navbar-inverse-toggler-border:        rgba($white,.1) !default;
+
+$navbar-light-color:                rgba($black,.5) !default;
+$navbar-light-hover-color:          rgba($black,.7) !default;
+$navbar-light-active-color:         rgba($black,.9) !default;
+$navbar-light-disabled-color:       rgba($black,.3) !default;
+$navbar-light-toggler-bg: str-replace(url("data:image/svg+xml;charset=utf8,%3Csvg viewBox='0 0 30 30' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath stroke='#{$navbar-light-color}' stroke-width='2' stroke-linecap='round' stroke-miterlimit='10' d='M4 7h22M4 15h22M4 23h22'/%3E%3C/svg%3E"), "#", "%23") !default;
+$navbar-light-toggler-border:       rgba($black,.1) !default;
+
+// Navs
+
+$nav-link-padding:              .5em 1em !default;
+$nav-disabled-link-color:       $gray-light !default;
+
+$nav-tabs-border-color:                       #ddd !default;
+$nav-tabs-border-width:                       $border-width !default;
+$nav-tabs-border-radius:                      $border-radius !default;
+$nav-tabs-link-hover-border-color:            $gray-lighter !default;
+$nav-tabs-active-link-hover-color:            $gray !default;
+$nav-tabs-active-link-hover-bg:               $body-bg !default;
+$nav-tabs-active-link-hover-border-color:     #ddd !default;
+
+$nav-pills-border-radius:     $border-radius !default;
+$nav-pills-active-link-color: $component-active-color !default;
+$nav-pills-active-link-bg:    $component-active-bg !default;
+
+
+// Pagination
+
+$pagination-padding-x:                .75rem !default;
+$pagination-padding-y:                .5rem !default;
+$pagination-padding-x-sm:             .5rem !default;
+$pagination-padding-y-sm:             .25rem !default;
+$pagination-padding-x-lg:             1.5rem !default;
+$pagination-padding-y-lg:             .75rem !default;
+$pagination-line-height:              1.25 !default;
+
+$pagination-color:                     $link-color !default;
+$pagination-bg:                        $white !default;
+$pagination-border-width:              $border-width !default;
+$pagination-border-color:              #ddd !default;
+
+$pagination-hover-color:               $link-hover-color !default;
+$pagination-hover-bg:                  $gray-lighter !default;
+$pagination-hover-border:              #ddd !default;
+
+$pagination-active-color:              $white !default;
+$pagination-active-bg:                 $brand-primary !default;
+$pagination-active-border:             $brand-primary !default;
+
+$pagination-disabled-color:            $gray-light !default;
+$pagination-disabled-bg:               $white !default;
+$pagination-disabled-border:           #ddd !default;
+
+
+// Jumbotron
+
+$jumbotron-padding:              2rem !default;
+$jumbotron-bg:                   $gray-lighter !default;
+
+
+// Form states and alerts
+//
+// Define colors for form feedback states and, by default, alerts.
+
+$state-success-text:             #3c763d !default;
+$state-success-bg:               #dff0d8 !default;
+$state-success-border:           darken($state-success-bg, 5%) !default;
+
+$state-info-text:                #31708f !default;
+$state-info-bg:                  #d9edf7 !default;
+$state-info-border:              darken($state-info-bg, 7%) !default;
+
+$state-warning-text:             #8a6d3b !default;
+$state-warning-bg:               #fcf8e3 !default;
+$mark-bg:                        $state-warning-bg !default;
+$state-warning-border:           darken($state-warning-bg, 5%) !default;
+
+$state-danger-text:              #a94442 !default;
+$state-danger-bg:                #f2dede !default;
+$state-danger-border:            darken($state-danger-bg, 5%) !default;
+
+
+// Cards
+
+$card-spacer-x:            1.25rem !default;
+$card-spacer-y:            .75rem !default;
+$card-border-width:        1px !default;
+$card-border-radius:       $border-radius !default;
+$card-border-color:        rgba($black,.125) !default;
+$card-border-radius-inner: calc(#{$card-border-radius} - #{$card-border-width}) !default;
+$card-cap-bg:              $gray-lightest !default;
+$card-bg:                  $white !default;
+
+$card-link-hover-color:    $white !default;
+
+$card-img-overlay-padding: 1.25rem !default;
+
+$card-deck-margin:          ($grid-gutter-width-base / 2) !default;
+
+$card-columns-count:        3 !default;
+$card-columns-gap:          1.25rem !default;
+$card-columns-margin:       $card-spacer-y !default;
+
+
+// Tooltips
+
+$tooltip-max-width:           200px !default;
+$tooltip-color:               $white !default;
+$tooltip-bg:                  $black !default;
+$tooltip-opacity:             .9 !default;
+$tooltip-padding-y:           3px !default;
+$tooltip-padding-x:           8px !default;
+$tooltip-margin:              3px !default;
+
+$tooltip-arrow-width:         5px !default;
+$tooltip-arrow-color:         $tooltip-bg !default;
+
+
+// Popovers
+
+$popover-inner-padding:               1px !default;
+$popover-bg:                          $white !default;
+$popover-max-width:                   276px !default;
+$popover-border-width:                $border-width !default;
+$popover-border-color:                rgba($black,.2) !default;
+$popover-box-shadow:                  0 5px 10px rgba($black,.2) !default;
+
+$popover-title-bg:                    darken($popover-bg, 3%) !default;
+$popover-title-padding-x:             14px !default;
+$popover-title-padding-y:             8px !default;
+
+$popover-content-padding-x:           14px !default;
+$popover-content-padding-y:           9px !default;
+
+$popover-arrow-width:                 10px !default;
+$popover-arrow-color:                 $popover-bg !default;
+
+$popover-arrow-outer-width:           ($popover-arrow-width + 1px) !default;
+$popover-arrow-outer-color:           fade-in($popover-border-color, .05) !default;
+
+
+// Badges
+
+$badge-default-bg:            $gray-light !default;
+$badge-primary-bg:            $brand-primary !default;
+$badge-success-bg:            $brand-success !default;
+$badge-info-bg:               $brand-info !default;
+$badge-warning-bg:            $brand-warning !default;
+$badge-danger-bg:             $brand-danger !default;
+
+$badge-color:                 $white !default;
+$badge-link-hover-color:      $white !default;
+$badge-font-size:             75% !default;
+$badge-font-weight:           $font-weight-bold !default;
+$badge-padding-x:             .4em !default;
+$badge-padding-y:             .25em !default;
+
+$badge-pill-padding-x:        .6em !default;
+// Use a higher than normal value to ensure completely rounded edges when
+// customizing padding or font-size on labels.
+$badge-pill-border-radius:    10rem !default;
+
+
+// Modals
+
+// Padding applied to the modal body
+$modal-inner-padding:         15px !default;
+
+$modal-dialog-margin:         10px !default;
+$modal-dialog-sm-up-margin-y: 30px !default;
+
+$modal-title-line-height:     $line-height-base !default;
+
+$modal-content-bg:               $white !default;
+$modal-content-border-color:     rgba($black,.2) !default;
+$modal-content-border-width:     $border-width !default;
+$modal-content-xs-box-shadow:    0 3px 9px rgba($black,.5) !default;
+$modal-content-sm-up-box-shadow: 0 5px 15px rgba($black,.5) !default;
+
+$modal-backdrop-bg:           $black !default;
+$modal-backdrop-opacity:      .5 !default;
+$modal-header-border-color:   $gray-lighter !default;
+$modal-footer-border-color:   $modal-header-border-color !default;
+$modal-header-border-width:   $modal-content-border-width !default;
+$modal-footer-border-width:   $modal-header-border-width !default;
+$modal-header-padding:        15px !default;
+
+$modal-lg:                    800px !default;
+$modal-md:                    500px !default;
+$modal-sm:                    300px !default;
+
+$modal-transition:            transform .3s ease-out !default;
+
+
+// Alerts
+//
+// Define alert colors, border radius, and padding.
+
+$alert-padding-x:             1.25rem !default;
+$alert-padding-y:             .75rem !default;
+$alert-margin-bottom:         $spacer-y !default;
+$alert-border-radius:         $border-radius !default;
+$alert-link-font-weight:      $font-weight-bold !default;
+$alert-border-width:          $border-width !default;
+
+$alert-success-bg:            $state-success-bg !default;
+$alert-success-text:          $state-success-text !default;
+$alert-success-border:        $state-success-border !default;
+
+$alert-info-bg:               $state-info-bg !default;
+$alert-info-text:             $state-info-text !default;
+$alert-info-border:           $state-info-border !default;
+
+$alert-warning-bg:            $state-warning-bg !default;
+$alert-warning-text:          $state-warning-text !default;
+$alert-warning-border:        $state-warning-border !default;
+
+$alert-danger-bg:             $state-danger-bg !default;
+$alert-danger-text:           $state-danger-text !default;
+$alert-danger-border:         $state-danger-border !default;
+
+
+// Progress bars
+
+$progress-height:               1rem !default;
+$progress-font-size:            .75rem !default;
+$progress-bg:                   $gray-lighter !default;
+$progress-border-radius:        $border-radius !default;
+$progress-box-shadow:           inset 0 .1rem .1rem rgba($black,.1) !default;
+$progress-bar-color:            $white !default;
+$progress-bar-bg:               $brand-primary !default;
+$progress-bar-animation-timing: 1s linear infinite !default;
+
+// List group
+
+$list-group-color:               $body-color !default;
+$list-group-bg:                  $white !default;
+$list-group-border-color:        rgba($black,.125) !default;
+$list-group-border-width:        $border-width !default;
+$list-group-border-radius:       $border-radius !default;
+
+$list-group-item-padding-x:      1.25rem !default;
+$list-group-item-padding-y:      .75rem !default;
+
+$list-group-hover-bg:            $gray-lightest !default;
+$list-group-active-color:        $component-active-color !default;
+$list-group-active-bg:           $component-active-bg !default;
+$list-group-active-border:       $list-group-active-bg !default;
+
+$list-group-disabled-color:      $gray-light !default;
+$list-group-disabled-bg:         $list-group-bg !default;
+
+$list-group-link-color:          $gray !default;
+$list-group-link-hover-color:    $list-group-link-color !default;
+
+$list-group-link-active-color:   $list-group-color !default;
+$list-group-link-active-bg:      $gray-lighter !default;
+
+
+// Image thumbnails
+
+$thumbnail-padding:           .25rem !default;
+$thumbnail-bg:                $body-bg !default;
+$thumbnail-border-width:      $border-width !default;
+$thumbnail-border-color:      #ddd !default;
+$thumbnail-border-radius:     $border-radius !default;
+$thumbnail-box-shadow:        0 1px 2px rgba($black,.075) !default;
+$thumbnail-transition:        all .2s ease-in-out !default;
+
+
+// Figures
+
+$figure-caption-font-size: 90% !default;
+$figure-caption-color:     $gray-light !default;
+
+
+// Breadcrumbs
+
+$breadcrumb-padding-y:          .75rem !default;
+$breadcrumb-padding-x:          1rem !default;
+$breadcrumb-item-padding:       .5rem !default;
+
+$breadcrumb-bg:                 $gray-lighter !default;
+$breadcrumb-divider-color:      $gray-light !default;
+$breadcrumb-active-color:       $gray-light !default;
+$breadcrumb-divider:            "/" !default;
+
+
+// Carousel
+
+$carousel-control-color:                      $white !default;
+$carousel-control-width:                      15% !default;
+$carousel-control-opacity:                    .5 !default;
+
+$carousel-indicator-width:                    30px !default;
+$carousel-indicator-height:                   3px !default;
+$carousel-indicator-spacer:                   3px !default;
+$carousel-indicator-active-bg:                $white !default;
+
+$carousel-caption-width:                      70% !default;
+$carousel-caption-color:                      $white !default;
+
+$carousel-control-icon-width:                 20px !default;
+
+$carousel-control-prev-icon-bg: str-replace(url("data:image/svg+xml;charset=utf8,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='#{$carousel-control-color}' viewBox='0 0 8 8'%3E%3Cpath d='M4 0l-4 4 4 4 1.5-1.5-2.5-2.5 2.5-2.5-1.5-1.5z'/%3E%3C/svg%3E"), "#", "%23") !default;
+$carousel-control-next-icon-bg: str-replace(url("data:image/svg+xml;charset=utf8,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='#{$carousel-control-color}' viewBox='0 0 8 8'%3E%3Cpath d='M1.5 0l-1.5 1.5 2.5 2.5-2.5 2.5 1.5 1.5 4-4-4-4z'/%3E%3C/svg%3E"), "#", "%23") !default;
+
+$carousel-transition:           transform .6s ease-in-out !default;
+
+
+// Close
+
+$close-font-size:             $font-size-base * 1.5 !default;
+$close-font-weight:           $font-weight-bold !default;
+$close-color:                 $black !default;
+$close-text-shadow:           0 1px 0 $white !default;
+
+// Code
+
+$code-font-size:              90% !default;
+$code-padding-x:              .4rem !default;
+$code-padding-y:              .2rem !default;
+$code-color:                  #bd4147 !default;
+$code-bg:                     $gray-lightest !default;
+
+$kbd-color:                   $white !default;
+$kbd-bg:                      $gray-dark !default;
+
+$pre-color:                   $gray-dark !default;
+$pre-scrollable-max-height:   340px !default;
diff --git a/src/scss/bootstrap-switch.scss b/src/scss/bootstrap-switch.scss
new file mode 100644
index 00000000..7b4200c9
--- /dev/null
+++ b/src/scss/bootstrap-switch.scss
@@ -0,0 +1,182 @@
+$bootstrap-switch-base: "bootstrap-switch" !default;
+
+.#{$bootstrap-switch-base} {
+  display: inline-block;
+  direction: ltr;
+  cursor: pointer;
+  @include border-radius($btn-border-radius);
+  border: 1px solid;
+  border-color: rgba(0, 0, 0, 0.1) rgba(0, 0, 0, 0.1) rgba(0, 0, 0, 0.25);
+  position: relative;
+  text-align: left;
+  overflow: hidden;
+  line-height: 8px;
+  z-index: 0;
+  user-select: none;
+  vertical-align: middle;
+  @include transition(border-color .15s ease-in-out, box-shadow .15s ease-in-out);
+
+  .#{$bootstrap-switch-base}-container {
+    display: inline-block;
+    top: 0;
+    @include border-radius($btn-border-radius);
+    transform: translate3d(0, 0, 0);
+  }
+
+  .#{$bootstrap-switch-base}-handle-on,
+  .#{$bootstrap-switch-base}-handle-off,
+  .#{$bootstrap-switch-base}-label {
+    box-sizing: border-box;
+    cursor: pointer;
+    display: inline-block !important;
+    height: 100%;
+    line-height: $btn-line-height;
+    @include button-size($btn-padding-y, $btn-padding-x, $font-size-base, 0);
+  }
+
+  .#{$bootstrap-switch-base}-handle-on,
+  .#{$bootstrap-switch-base}-handle-off {
+    text-align: center;
+    z-index: 1;
+
+    &.#{$bootstrap-switch-base}-primary {
+      @include button-variant($btn-primary-color, $btn-primary-bg, $btn-primary-border);
+    }
+
+    &.#{$bootstrap-switch-base}-secondary {
+      @include button-variant($btn-secondary-color, $btn-secondary-bg, $btn-secondary-border);
+    }
+
+    &.#{$bootstrap-switch-base}-info {
+      @include button-variant($btn-info-color, $btn-info-bg, $btn-info-border);
+    }
+
+    &.#{$bootstrap-switch-base}-success {
+      @include button-variant($btn-success-color, $btn-success-bg, $btn-success-border);
+    }
+
+    &.#{$bootstrap-switch-base}-warning {
+      @include button-variant($btn-warning-color, $btn-warning-bg, $btn-warning-border);
+    }
+
+    &.#{$bootstrap-switch-base}-danger {
+      @include button-variant($btn-danger-color, $btn-danger-bg, $btn-danger-border);
+    }
+  }
+
+  .#{$bootstrap-switch-base}-label {
+    text-align: center;
+    margin-top: -1px;
+    margin-bottom: -1px;
+    z-index: 100;
+    border-left: $input-btn-border-width solid transparent;
+    border-right: $input-btn-border-width solid transparent;
+  }
+
+  .#{$bootstrap-switch-base}-handle-on {
+    @include border-left-radius($btn-border-radius);
+  }
+
+  .#{$bootstrap-switch-base}-handle-off {
+    @include border-right-radius($btn-border-radius);
+  }
+
+  input[type='radio'],
+  input[type='checkbox'] {
+    position: absolute !important;
+    top: 0;
+    left: 0;
+    opacity: 0;
+    z-index: -1;
+  }
+
+  &.#{$bootstrap-switch-base}-mini {
+    min-width: 71px;
+
+    .#{$bootstrap-switch-base}-handle-on,
+    .#{$bootstrap-switch-base}-handle-off,
+    .#{$bootstrap-switch-base}-label {
+      @include button-size($btn-padding-y-sm, $btn-padding-x-sm, $font-size-sm, $btn-border-radius-sm);
+      // padding: 3px 6px;
+      // font-size: 10px;
+      // line-height: 9px;
+    }
+  }
+
+  &.#{$bootstrap-switch-base}-small {
+    min-width: 79px;
+
+    .#{$bootstrap-switch-base}-handle-on,
+    .#{$bootstrap-switch-base}-handle-off,
+    .#{$bootstrap-switch-base}-label {
+      @include button-size($btn-padding-y-sm, $btn-padding-x-sm, $font-size-sm, $btn-border-radius-sm);
+      // line-height: 18px;
+    }
+  }
+
+  &.#{$bootstrap-switch-base}-large {
+    min-width: 120px;
+
+    .#{$bootstrap-switch-base}-handle-on,
+    .#{$bootstrap-switch-base}-handle-off,
+    .#{$bootstrap-switch-base}-label {
+      @include button-size($btn-padding-y-lg, $btn-padding-x-lg, $font-size-lg, $btn-border-radius-lg);
+      // padding: 9px 12px;
+      // font-size: 16px;
+      // line-height: normal;
+    }
+  }
+
+  &.#{$bootstrap-switch-base}-disabled,
+  &.#{$bootstrap-switch-base}-readonly,
+  &.#{$bootstrap-switch-base}-indeterminate {
+    cursor: default !important;
+
+    .#{$bootstrap-switch-base}-handle-on,
+    .#{$bootstrap-switch-base}-handle-off,
+    .#{$bootstrap-switch-base}-label {
+      opacity: .5;
+      cursor: default !important;
+    }
+  }
+
+  &.#{$bootstrap-switch-base}-animate {
+    .#{$bootstrap-switch-base}-container {
+      @include transition(margin-left .5s);
+    }
+  }
+
+  &.#{$bootstrap-switch-base}-inverse {
+    .#{$bootstrap-switch-base}-handle-on {
+      @include border-left-radius(0);
+      @include border-right-radius($btn-border-radius);
+    }
+
+    .#{$bootstrap-switch-base}-handle-off {
+      @include border-right-radius(0);
+      @include border-left-radius($btn-border-radius);
+    }
+  }
+
+  &.#{$bootstrap-switch-base}-focused {
+    @if $enable-shadows {
+      box-shadow: $btn-box-shadow, 0 0 0 2px rgba($btn-primary-border, .5);
+    } @else {
+      box-shadow: 0 0 0 2px rgba($btn-primary-border, .5);
+    }
+  }
+
+  &.#{$bootstrap-switch-base}-on,
+  &.#{$bootstrap-switch-base}-inverse.#{$bootstrap-switch-base}-off {
+    .#{$bootstrap-switch-base}-label {
+      @include border-right-radius($btn-border-radius);
+    }
+  }
+
+  &.#{$bootstrap-switch-base}-off,
+  &.#{$bootstrap-switch-base}-inverse.#{$bootstrap-switch-base}-on {
+    .#{$bootstrap-switch-base}-label {
+      @include border-left-radius($btn-border-radius);
+    }
+  }
+}
diff --git a/src/less/bootstrap2/build.less b/src/scss/build.scss
similarity index 58%
rename from src/less/bootstrap2/build.less
rename to src/scss/build.scss
index beda34a1..2497b4b6 100644
--- a/src/less/bootstrap2/build.less
+++ b/src/scss/build.scss
@@ -1,3 +1,3 @@
 @import "variables";
 @import "mixins";
-@import "bootstrap-switch";
\ No newline at end of file
+@import "bootstrap-switch";
diff --git a/src/scss/mixins/_border-radius.scss b/src/scss/mixins/_border-radius.scss
new file mode 100644
index 00000000..54f29f41
--- /dev/null
+++ b/src/scss/mixins/_border-radius.scss
@@ -0,0 +1,35 @@
+// Single side border-radius
+
+@mixin border-radius($radius: $border-radius) {
+  @if $enable-rounded {
+    border-radius: $radius;
+  }
+}
+
+@mixin border-top-radius($radius) {
+  @if $enable-rounded {
+    border-top-right-radius: $radius;
+    border-top-left-radius: $radius;
+  }
+}
+
+@mixin border-right-radius($radius) {
+  @if $enable-rounded {
+    border-bottom-right-radius: $radius;
+    border-top-right-radius: $radius;
+  }
+}
+
+@mixin border-bottom-radius($radius) {
+  @if $enable-rounded {
+    border-bottom-right-radius: $radius;
+    border-bottom-left-radius: $radius;
+  }
+}
+
+@mixin border-left-radius($radius) {
+  @if $enable-rounded {
+    border-bottom-left-radius: $radius;
+    border-top-left-radius: $radius;
+  }
+}
diff --git a/src/scss/mixins/_buttons.scss b/src/scss/mixins/_buttons.scss
new file mode 100644
index 00000000..f9981e32
--- /dev/null
+++ b/src/scss/mixins/_buttons.scss
@@ -0,0 +1,86 @@
+// Button variants
+//
+// Easily pump out default styles, as well as :hover, :focus, :active,
+// and disabled options for all buttons
+
+@mixin button-variant($color, $background, $border) {
+  $active-background: darken($background, 10%);
+  $active-border: darken($border, 12%);
+
+  color: $color;
+  background-color: $background;
+  border-color: $border;
+  @include box-shadow($btn-box-shadow);
+
+  // Hover and focus styles are shared
+  @include hover {
+    color: $color;
+    background-color: $active-background;
+    border-color: $active-border;
+  }
+  &:focus,
+  &.focus {
+    // Avoid using mixin so we can pass custom focus shadow properly
+    @if $enable-shadows {
+      box-shadow: $btn-box-shadow, 0 0 0 2px rgba($border, .5);
+    } @else {
+      box-shadow: 0 0 0 2px rgba($border, .5);
+    }
+  }
+
+  // Disabled comes first so active can properly restyle
+  &.disabled,
+  &:disabled {
+    background-color: $background;
+    border-color: $border;
+  }
+
+  &:active,
+  &.active,
+  .show > &.dropdown-toggle {
+    color: $color;
+    background-color: $active-background;
+    background-image: none; // Remove the gradient for the pressed/active state
+    border-color: $active-border;
+    @include box-shadow($btn-active-box-shadow);
+  }
+}
+
+@mixin button-outline-variant($color, $color-hover: #fff) {
+  color: $color;
+  background-image: none;
+  background-color: transparent;
+  border-color: $color;
+
+  @include hover {
+    color: $color-hover;
+    background-color: $color;
+    border-color: $color;
+  }
+
+  &:focus,
+  &.focus {
+    box-shadow: 0 0 0 2px rgba($color, .5);
+  }
+
+  &.disabled,
+  &:disabled {
+    color: $color;
+    background-color: transparent;
+  }
+
+  &:active,
+  &.active,
+  .show > &.dropdown-toggle {
+    color: $color-hover;
+    background-color: $color;
+    border-color: $color;
+  }
+}
+
+// Button sizes
+@mixin button-size($padding-y, $padding-x, $font-size, $border-radius) {
+  padding: $padding-y $padding-x;
+  font-size: $font-size;
+  @include border-radius($border-radius);
+}
diff --git a/src/scss/mixins/_hover.scss b/src/scss/mixins/_hover.scss
new file mode 100644
index 00000000..6dd55e70
--- /dev/null
+++ b/src/scss/mixins/_hover.scss
@@ -0,0 +1,60 @@
+@mixin hover {
+  // TODO: re-enable along with mq4-hover-shim
+//  @if $enable-hover-media-query {
+//    // See Media Queries Level 4: https://drafts.csswg.org/mediaqueries/#hover
+//    // Currently shimmed by https://github.com/twbs/mq4-hover-shim
+//    @media (hover: hover) {
+//      &:hover { @content }
+//    }
+//  }
+//  @else {
+    &:hover { @content }
+//  }
+}
+
+@mixin hover-focus {
+  @if $enable-hover-media-query {
+    &:focus { @content }
+    @include hover { @content }
+  }
+  @else {
+    &:focus,
+    &:hover {
+      @content
+    }
+  }
+}
+
+@mixin plain-hover-focus {
+  @if $enable-hover-media-query {
+    &,
+    &:focus {
+      @content
+    }
+    @include hover { @content }
+  }
+  @else {
+    &,
+    &:focus,
+    &:hover {
+      @content
+    }
+  }
+}
+
+@mixin hover-focus-active {
+  @if $enable-hover-media-query {
+    &:focus,
+    &:active {
+      @content
+    }
+    @include hover { @content }
+  }
+  @else {
+    &:focus,
+    &:active,
+    &:hover {
+      @content
+    }
+  }
+}
diff --git a/test.html b/test.html
index 76f76cf9..8c12e008 100644
--- a/test.html
+++ b/test.html
@@ -7,11 +7,8 @@
     <meta name="description" content="Turn checkboxes and radio buttons in toggle switches.">
     <meta name="author" content="Mattia Larentis, Emanuele Marchi and Peter Stein">
     <title>Bootstrap Switch · Turn checkboxes and radio buttons in toggle switches</title>
-    <link href="docs/css/bootstrap.min.css" rel="stylesheet">
-    <link href="docs/css/highlight.css" rel="stylesheet">
-    <link href="dist/css/bootstrap3/bootstrap-switch.css" rel="stylesheet">
-    <link href="http://getbootstrap.com/assets/css/docs.min.css" rel="stylesheet">
-    <link href="docs/css/main.css" rel="stylesheet">
+    <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-alpha.6/css/bootstrap.min.css" integrity="sha384-rwoIResjU2yc3z8GV/NPeZWAv56rSmLldC3R/AZzGRnGxQQKnKkoFVhFQhNUwEyJ" crossorigin="anonymous">
+    <link href="dist/css/bootstrap-switch.css" rel="stylesheet"></link>
   </head>
   <body>
     <div>
@@ -20,13 +17,13 @@
     <div>
       <input type="checkbox" checked>
     </div>
-    <script src="docs/js/jquery.min.js"></script>
-    <script src="docs/js/bootstrap.min.js"></script>
+    <script src="https://code.jquery.com/jquery-3.1.1.min.js"></script>
+    <script src="https://cdnjs.cloudflare.com/ajax/libs/tether/1.4.0/js/tether.min.js" integrity="sha384-DztdAPBWPRXSA/3eYEEUWrWCy7G5KFbe8fFjk5JAIxUYHKkDx6Qin1DkWx51bBrb" crossorigin="anonymous"></script>
+    <script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-alpha.6/js/bootstrap.min.js" integrity="sha384-vBWWzlZJ8ea9aCX4pEW3rVHjgjt7zpkNpZk+02D9phzyeVkE+jo0ieGizqPLForn" crossorigin="anonymous"></script>
     <script src="dist/js/bootstrap-switch.js"></script>
     <script>
-    $(function(argument) {
-      $('[type="checkbox"]').bootstrapSwitch();
-    })
+    const $ = window.jQuery
+    $(() => { $('[type="checkbox"]').bootstrapSwitch() })
     </script>
   </body>
 </html>