main.css

:root {
	--sans-font-family: "Helvetica Neue", Helvetica, Arial, sans-sarif;
	--system-font-family: -apple-system, BlinkMacSystemFont, "Helvetica Neue", Helvetica, Arial, sans-sarif;
	--serif-font-family: Charter, Georgia, "Times New Roman", serif;
	--fixed-width-font-family: -ui-monospace, Consolas, Monaco, "Lucida Console", "Courier New", monospace;
		
	/* Site colors */
	--container-bg: #fff;
	--header: #242423;

	--header-text: #eee;
	--body-text: #424240;
	--text-light: #7e7e7a;
	
	--gray: #c7c8ca;
	--light-gray: #dbdcdd;
	--lighter-gray: #f6f6f5;

	--scarlet: #d00000;			
	--blue: #1e8bff;
	--green: #28c840;
	--yellow: #febc30;
}

html {
	height: 100%;
	box-sizing: border-box;
}
	  
body {
	text-size-adjust: none;
	-webkit-text-size-adjust: none;
	font-family: var(--sans-font-family);
	color: var(--body-text);
	margin: 0;
	padding: 0;
	height: 100%;
	background-color: var(--container-bg);
	font-size: 14px;
	min-width: 240px;

	user-select: none; 
	-webkit-user-select: none;
	-webkit-touch-callout: none; /* Disable text highlighting on iOS */
}
		
h1 { font-size: 2em; }
h2 { font-size: 1.5em; }
h3 { font-size: 1.25em; }
h4 { font-size: 1em; }
h5 { font-size: 0.83em; }
h6 { font-size: 0.67em; }

p {
	line-height: 1.6em;
	padding: 0;
	margin: 0 0 1em 0;
}

a {
	color: var(--blue);
	text-decoration: none;
	cursor: pointer;
}
a:hover { text-decoration: underline; }

#wrapper {
	min-height: 100%;
	display: grid;
	grid-template-rows: auto 1fr auto;
}

#header {
	position: relative;
	background-color: var(--header);
	color: var(--header-text);
	text-align: center;
	padding: 10px;
			
	display: grid;
	grid-template-columns: minmax(100px, 1fr) 5fr minmax(100px, 1fr);
	align-items: center;
	padding-top: 10px;
	padding-right: max(18px, env(safe-area-inset-right)); 
	padding-bottom: 10px;
	padding-left: max(18px, env(safe-area-inset-left)); 
}
#header img {
	position: relative;
	top: 2px;
	height: 1em;
	margin-right: 10px;
}

#header a:hover { text-decoration: none; }

.header-col-1 { text-align: left; }
.header-col-2 { text-align: center; }
.header-col-3 { text-align: right; }

#environment-type {
	display: inline-block;
	cursor: default;
	color: #000;
	font-weight: 600;
	padding: 3px 9px;
	border-radius: 1000px;
	z-index: 99;

	box-shadow: 0 0 0 0 rgba(0, 0, 0, 1);
	transform: scale(1);
	animation: pulse 2s infinite;
}
#environment-type.live { background-color: var(--green); }
#environment-type.test { background-color: var(--yellow); }

@keyframes pulse {
	0% {
		transform: scale(0.95);
		box-shadow: 0 0 0 0 rgba(255,255,255,0.3);
	}
	70% {
		transform: scale(1);
		box-shadow: 0 0 0 10px rgba(255,255,255,0);
	}
	100% {
		transform: scale(0.95);
		box-shadow: 0 0 0 0 rgba(255,255,255,0);
	}
}

#preview-link {
	display: inline-block;
	position: relative;
	color: var(--header-text);
	font-weight: normal;
	padding: 3px 11px 3px 28px;
	border-radius: 1000px;
	background-color: rgba(255,255,255,0.2);
	z-index: 99;	
}
#preview-link:hover { background-color: rgba(255,255,255,0.3); }
#preview-link:active { background-color: rgba(255,255,255,0.2); }

#preview-link svg {
	position: absolute;
	top: 0px;
	left: 4px;
	width: 1em;
	height: 1em;
	padding: 4px;
	opacity: 0.9;
	fill: var(--header-text);
}

@media screen and (max-width: 600px) {
	#header { grid-template-columns: 1fr; }
	#header h1 { font-size: 18px; }
	.header-col-1, .header-col-3, #environment-type, #preview-link {
		display: none;
	}
}
			
#slides-form {
}

/* BUTTON STYLES */

select { 
	appearance: none;
	/* reset a bunch of default styles */
	border: none;
	padding: 0;
	margin: 0;
	font-family: inherit;
	font-size: inherit;
	cursor: inherit;
	line-height: inherit;
}

button, select {
	padding: 4px 6px;
	font-size: 11px;
	font-weight: normal;
	height: 100%;
	box-sizing: border-box;
	border: 1px solid var(--gray);
	border-radius: 7px;
	box-shadow: 0px 1px 1px rgba(0,0,0,0.1);

	color: var(--body-text);
	background: linear-gradient(to bottom,  #fff 0%,#f3f3f3 50%,#ededed 51%,#fff 100%);
}
button:disabled, select:disabled { opacity: 0.4; }
select {
	padding-right: 20px;
	background: url('/images/select-arrows.svg') no-repeat right 5px center / auto 130%, linear-gradient(to bottom,  #fff 0%,#f3f3f3 50%,#ededed 51%,#fff 100%);
}
select:focus { outline: none; }
button:active {
	background: linear-gradient(to bottom,  #eee 0%,#e3e3e3 50%,#ddd 51%,#eee 100%);
}
button:disabled:active {
	background: linear-gradient(to bottom,  #fff 0%,#f3f3f3 50%,#ededed 51%,#fff 100%);
}
button[value=delete]:enabled { color: var(--scarlet); }

/* CONTROL RIBBON */

.control-ribbon {
	display: grid;
	grid-template-columns: 1fr auto 1fr; /* Three columns: flexible, auto, flexible */
	gap: 5px;
	align-items: center;
	
	position: sticky;
	top: 0;
	padding-top: 12px;
	padding-right: max(18px, env(safe-area-inset-right)); 
	padding-bottom: 12px;
	padding-left: max(18px, env(safe-area-inset-left)); 
	border-bottom: 1px solid var(--light-gray);
	
	background-color: rgba(240,241,239,0.8);
	backdrop-filter: blur(9px);
	-webkit-backdrop-filter: blur(9px);
	z-index: 999;
	
	font-size: 13px; /* reduce at smaller page widths w/ media styles below */
	font-family: var(--system-font-family);
	
	cursor: default;
	white-space: nowrap;
	user-select: none; 
	-webkit-user-select: none;
	-webkit-touch-callout: none; /* Disable text highlighting on iOS */
}
.ribbon-col-1,.ribbon-col-2, .ribbon-col-3 {
	display: flex;
}
.ribbon-col-2 { text-align: center; }	
.ribbon-col-3 { justify-content: end; }

.control-ribbon button, .control-ribbon select {
	font-size: 13px;
}

.ribbon-col-1 button, .ribbon-col-1 select,
.ribbon-col-2 button, .ribbon-col-2 select {
	margin-right: 5px;
}
.ribbon-col-3 button, .ribbon-col-3 select {
	margin-left: 5px;
}

.button-group {
	display: grid;
	grid-template-rows: auto auto;
	gap: 3px;
	align-items: center;
	text-align: center;
	padding: 0px 7px;
	border-left: 1px solid #c6c6c6;
}
.button-group:first-of-type {
	padding-left: 0;
	border-left: none;
}
.button-group:last-of-type {
	border-right: none;
	padding-right: 0;
}

button.segmented-button {
	margin:0;
	border-left: 0px;
	border-radius: 0px;
}
.segmented-button.segmented-first {
	border-radius: 7px 0 0 7px;
	border-left: 1px solid var(--gray);
}
.segmented-button.segmented-last {
	border-radius: 0px 7px 7px 0px;
	margin-right: 5px;
}

button:last-of-type,
.segmented-button:last-of-type { margin-right: 0px; }

#show-upload-button {
	font-size: 14px;
	padding: 5px 7px;
	margin: 0 5px;
	border-radius: 7px;
}
#show-upload-button:hover {
	text-decoration: none;
	color: #fff;
	background-color: var(--blue);
}
#show-upload-button:active { box-shadow: inset 0 0 10px rgba(0,0,0,0.5); }

@media screen and (max-width: 1400px) {
	.control-ribbon, .control-ribbon button, .control-ribbon select { font-size: 12px; }
}	
@media screen and (max-width: 1100px) {
	.control-ribbon, .control-ribbon button, .control-ribbon select { font-size: 11px; }
}	
@media screen and (max-width: 800px) {
	.narrow-hide-first { display: none; }
	.control-ribbon, .control-ribbon button, .control-ribbon select { font-size: 10px; }
	#show-upload-button { font-size: 12px; }
}
@media screen and (max-width: 640px) {
	.control-ribbon { padding-bottom: 9px; }
	.narrow-hide { display: none; }
}

/* SLIDES CONTENT AREA */

#no-slides-found {
	text-align: center;
	margin: auto;
	padding: 50px 10px;
}

#slide-container {
	display: grid;
	grid-auto-rows: 1fr;
	grid-template-columns: repeat(6, minmax(0, 1fr));
	grid-gap: 12px;
	justify-content: space-between;
	width: 100%;			
	padding-top: 15px;
	padding-right: max(15px, env(safe-area-inset-right)); 
	padding-bottom: 15px;
	padding-left: max(15px, env(safe-area-inset-left)); 
	box-sizing: border-box;

	user-select: none; 
	-webkit-user-select: none;
	-webkit-touch-callout: none; /* Disable text highlighting on iOS */
}
@media screen and (max-width: 1600px) {
	#slide-container { grid-template-columns: repeat(5, minmax(0, 1fr)); }
}
@media screen and (max-width: 1200px) {
	#slide-container { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}
@media screen and (max-width: 800px) {
	#slide-container { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}	
@media screen and (max-width: 500px) {
	#slide-container { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

.slide-div {
	border: 3px solid #f6f6f6;
	border-radius: 8px;
	text-align: center;
	font-family: var(--system-font-family);
	font-size: 10px;
	
	position: relative;
	padding: 0;
	box-sizing: border-box;

	width: 100%;
	aspect-ratio: 16/9;
	background-size: 100%;
	background-position: top center;
	background-repeat: no-repeat;
}

.slide-div.slide-checked { border: 3px solid var(--blue); }

.slide-div.slide-hidden::after, .slide-div.slide-checked::after {
	content: '';
	position: absolute;
	top: 0;
	left: 0;
	width: 100%;
	height: 100%;
	border-radius: 5px;
	box-sizing: border-box;
	z-index: 10;
}

.slide-div.slide-hidden::after{
	content: 'Hidden';
	font-weight: 600;
	padding-top: 9px;
	background: rgba(255,255,255,0.7);
}

.slide-div.slide-checked::after { background: rgba(30,139,255,0.5); }

.slide-div.slide-hidden.slide-checked::after { background: rgba(207,230,255,0.8); }
	
.slide-checkbox {
	position: absolute;
	top: 6px;
	left: 7px;
	opacity: 0.8;
	z-index: 20;
}
.slide-checkbox:checked { opacity: 1; }

.slide-details {
	max-width: 90%;
	position: absolute;
	
	padding: 2px 6px;
	box-sizing: border-box;
	border-radius: 1000px;
	background: var(--lighter-gray);
	box-shadow: 0px 2px 2px rgba(0,0,0,0.2);
}

.slide-details-duration {
	font-weight: 600;
	top: 7px;
	right: 7px;	
}

.slide-details-filename {
	bottom: 7px;
	left: 50%;
	transform: translate(-50%, 0);
	white-space: nowrap;
	overflow: hidden;
	text-overflow: ellipsis;
	z-index: 20;
}
.slide-div.slide-checked .slide-details-filename {
	color: #fff;
	background-color: var(--blue);;
}

#no-slides-found {
	position: absolute;
	top:max(200px, 50%);
	left: 50%;
	transform: translate(-50%,-50%);
	z-index: 1;
}

/* UPLOAD BOX */

#upload-background-blur {
	visibility: hidden;
	opacity: 0;
	transition: opacity 0.4s ease-in-out;
	
	width: 100%;
	height: 100%;
	position: fixed;
	background-color: rgba(48,48,48,0.5);
	backdrop-filter: blur(1px);
	-webkit-backdrop-filter: blur(1px);
	z-index: 1000;
}
#upload-background-blur.show {
	visibility: visible;
	opacity: 1;
}

#upload-form-box {
	visibility: hidden;
	opacity: 0;
	transition: opacity 0.4s ease-in-out;
	
	position: fixed;
	top: 50%;
	left: 50%;
	transform: translate(-50%, -55%);
	
	padding: 0 20px 20px 20px;
	color: var(--body-text);
	background-color: var(--container-bg);
	font-family: var(--system-font-family);
	font-size: 12px;
	border-radius: 10px;
	box-shadow: 0px 20px 50px rgba(0,0,0,0.95);

	width: 90%;
	min-width: 280px;
	max-width: 340px;		
	box-sizing: border-box;		
	z-index: 1001;
}
#upload-form-box.show {
	visibility: visible;
	opacity: 1;
}

#upload-form-title {
	padding: 7px;
	color: var(--body-text);
	text-align: center;
	text-transform: uppercase;
}

#upload-form-body{
	padding: 20px;
	text-align: center;
}

.upload-form-options {
	display: grid;
	grid-template-columns: 1fr 2fr;
	gap: 5px;
	align-items: center;
	width: 80%;
	margin: auto;
	padding: 20px 0 12px 0;
}
.upload-form-options label { text-align: right; }

#upload-form-details {
	width: fit-content;
	block-size: fit-content;
	margin: auto;
	padding: 0px 20px;
	color: var(--text-light);
	font-size: 10px;
}
#upload-form-details ul {
	padding: 0;
	margin: 0;
}
.emphasis { font-weight: 600; }

/* CONF AND ERROR MESSAGES */

#items-selected-box {
	display: none;
	position: fixed;
	bottom: 39px;
	left: 50%;
	transform: translate(-50%, 0);
	color: #fff;
	background-color: var(--blue);
	padding: 5px 14px 5px 29px;
	border-radius: 1000px;
	box-shadow: 0px 3px 5px rgba(0,0,0,0.5);
	cursor: default;
	z-index: 999;
}
#items-selected-box.show {
	display: block;
}
#items-selected-box a {
	position: absolute;
	top: 3px;
	left: 4px;
	width: 1em;
	height: 1em;
	padding: 4px;
	border-radius: 1000px;
	opacity: 0.9;
}
#items-selected-box a:hover { background-color: rgba(0,0,0,0.3); }
#items-selected-box a:active { background-color: rgba(0,0,0,0.4); }
#items-selected-box svg {
	height: 1em;
	fill: #fff;
}

#confirmation-messages {
	position: fixed;
	bottom: 0;
	width: 100%;
	backdrop-filter: blur(9px);
	-webkit-backdrop-filter: blur(9px);
	z-index: 999;
}
#confirmation-messages div {
	color: #fff;
	text-align: center;
	padding: 15px;
	opacity: 0.8;
}
div.error-message { background-color: var(--scarlet); }
div.good-message, div.upload-success-message {
	background-color: var(--green);
}

/* FOOTER */

.footer {
	display: grid;
	grid-template-columns: 1fr auto 1fr; /* Three columns: flexible, auto, flexible */
	align-items: center;
	
	color: var(--text-light);
	background-color: var(--lighter-gray);
	padding-top: 12px;
	padding-right: max(18px, env(safe-area-inset-right)); 
	padding-bottom: max(12px, env(safe-area-inset-bottom)); 
	padding-left: max(18px, env(safe-area-inset-left)); 
	border-top: 1px solid var(--light-gray);
	text-align: center;
	font-size: 11px;
	z-index: 9;
	-webkit-text-size-adjust: none;
}
.footer-col-1 { text-align: left; }
.footer-col-3 { text-align: right; }
	
#help-link, #download-link {
	display: inline-block;
	position: relative;
	color: var(--body-text);
	font-size: 14px;
	font-weight: normal;
	padding: 3px 10px;
	border-radius: 1000px;
	background-color: rgba(0,0,0,0.08);
	z-index: 99;	
}
#download-link { padding-left: 26px; }
#help-link:hover, #download-link:hover { background-color: rgba(0,0,0,0.15); text-decoration:none; }
#help-link:active, #download-link:active { background-color: rgba(0,0,0,0.3); }

#download-link svg {
	position: absolute;
	top: 0px;
	left: 4px;
	width: 1em;
	height: 1em;
	padding: 4px;
	opacity: 0.9;
	fill: var(--body-text);
}

@media screen and (max-width: 500px) {
	.footer {
		grid-template-columns: 1fr;
	}
	.footer-col-1, .footer-col-3 {
		display: none;
	}
}