style.css

/**
 * @license
 * Copyright 2019 Google Inc. All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

 * {box-sizing: border-box}
[hidden] {display: none !important}
[disabled] {pointer-events:none; opacity: 0.3}

body {
  --background: #f2f4f6;
  --foreground: #232946;
  --primary: #f582ae;
  --secondary: #00ebc7;
  --spacing-s: 8px;
  --spacing: 14px;
  --spacing-m: 28px;
  --box-height: 200px;

  width: 100vw;
  height: 100vh;
  overflow: hidden;
  margin: 0;
  background: var(--background);
  color: var(--foreground);
  font-family: 'Work Sans', sans-serif;
}

/*
 * Main layout.
 */
h1 {
  text-align: center;
  display: block;
  font-size: 30px;
  font-weight: lighter;
  letter-spacing: 2px;
}
h1 > span, h1 > button {
  display: inline-block;
  vertical-align: middle;
}
h1.outside {
  position: absolute;
  top: -80px;
  right: 0;
}
a:link, a:visited {
  color: inherit;
  font-weight: bold;
  transition: color 0.2s ease-in-out;
}
a:hover {
  color: var(--primary);
}

section {
  position: absolute;
  top: 0;
  left: 0;
  height: 100vh;
  width: 100vw;
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  overflow: auto;
}
.vertical {
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  align-items: stretch;
}
.horizontal {
  display: flex;
  flex-direction: row;
  justify-content: space-between;
  align-items: center;
}

.box {
  position: relative;
  background: white;
  padding: var(--spacing) var(--spacing-m);
  width: 90vw;
  max-width: 720px;
  margin: 200px auto;
  margin-bottom: 0;
  height: var(--box-height);
  border-radius: var(--spacing);
  box-shadow: 0 30px 56px 6px rgba(0, 0, 0, 0.1);
}

.box.long {
  padding: var(--spacing-m);
  height: 100%;
  background: transparent;
  box-shadow: none;
  margin-top: var(--spacing-m);
  line-height: 1.4;
}
/*
 * Album art.
 */
.album {
  position: relative;
  margin-right: var(--spacing-s);
}
.album.rotating {
  animation: rotate infinite 15s linear;
}
@keyframes rotate {
  from { transform: rotate(0) }
  to   { transform: rotate(360deg) }
}
.album canvas {
  background: white;
  border: 10px solid white;
  border-radius: var(--spacing);
  border-radius: 50%;
}

/*
 * Current song information.
 */
.song-title {
  font-size: 18px;
  font-weight: 900;
  margin: var(--spacing) 0;
  letter-spacing: 2px;
  flex: 1;
}
.progress {
  width: 100%;
}
.current-time, .total-time {
  font-size: 12px;
}
progress {
  -webkit-appearance: none;
  border: none;
  box-shadow: none;
  height: 4px;
  width: 100%;
}
/* Background. */
progress::-webkit-progress-bar {
  background:var(--background);
  border: none;
  box-shadow: none;
}
/* Value. */
progress::-webkit-progress-value {
  border: none;
  box-shadow: none;
  background: var(--foreground);
}

/*
 * Play controls.
 */
.controls {
  position: relative;
  width: 100%;
}

button, .button {
  display:block;
  color: var(--foreground);
  background: transparent;
  border: none;
  border-radius: 50%;
  cursor: pointer;
  transition: color 0.2s ease-in-out, transform 0.2s ease-in-out;
  margin: 0;
  padding: 0;
  font-weight: normal;
  font-family: inherit;
  font-size: inherit;
}
a.button:link, a.button:visited {
  font-weight: normal;
  text-decoration: none;
}
button.square {
  border: 1px solid #00b398;
  border-radius: 3px;
  padding: var(--spacing-s) var(--spacing-m);
  background: var(--secondary);
  color: var(--foreground);
  min-width: 100px;
  transition: background 0.2s linear;
  margin: var(--spacing-m) auto;
  text-transform: uppercase;
  letter-spacing: 2px;
}
button.square:hover {
  background: var(--primary);
  border-color: var(--primary);
  color: var(--foreground);
}

button:hover {
  color: var(--primary);
}
button svg, .button svg {
  pointer-events: none;
  fill: currentColor;
  width: 40px;
  height: 40px;
  margin: 0 auto;
  vertical-align: middle;
}
button.active > svg.yes,
button:not(.active) > svg.no {
  display: block;
}
button:not(.active) > svg.yes,
button.active > svg.no {
  display: none;
}
button.active {
  color: var(--secondary);
}

#btnShare svg {
  height: 24px;
  width: 24px;
}

/*
 * Playlist.
 */
.popup {
  position: absolute;
  background: white;
  border-radius: var(--spacing);
  height: 0;
  right: 0;
  top: calc(var(--box-height) - 20px);  /* this is the same as the height set in .box and spacing*/
  left: 300px; /* width of canvas + a bit */
  padding: var(--spacing-s) var(--spacing-m);
  visibility: hidden;
  transition: height 0.2s ease-in-out, visibility 0.2s ease-in-out;
  z-index: -10;
}
.popup.showing {
  z-index: 1;
  height: 40vh;
  visibility: visible;
  transition: height 0.2s ease-in-out, visibility 0.2s ease-in-out;
  overflow: auto;
}
.popup.share.showing {
  height: 200px;
}
.popup .content {
  display: none;
}
.popup.showing .content {
  display: block;
}
.popup ul {
  margin: 0;
  padding: 0;
  list-style-type: none;
}
.popup ul li {
  padding: var(--spacing-s);
  cursor: pointer;
  display: flex;
  flex-direction: row;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--background);
}
.popup ul li.list-header {
  text-transform: uppercase;
  font-size: 12px;
}
.popup ul li svg {
  width: 24px;
  height: 24px;
}
.popup ul li:not(.list-header):hover {
  background: var(--background);
}
.popup ul li > div:first-of-type {
  flex: 3;
}
.popup ul li > div:not(:first-of-type) {
  flex: 1;
}

/*
 * Bottom waves.
 */
.waves {
  position: absolute;
  bottom: 0;
  width: 100vw;
  z-index: -2;
  fill-opacity: 0.5;
}
.waves > svg > path:first-of-type {
  fill: var(--primary);
}
.waves > svg > path:last-of-type {
  fill: var(--secondary);
}

/*
 * Small screens.
 */
@media only screen and (max-width: 760px)  {
  h1 {
    font-size: 26px;
  }
}
@media only screen and (max-width: 700px)  {
  body {
    --box-height: 260px;
  }
  .box {
    flex-direction: column;
    margin-top: 200px;
  }
  .box.long {
    width: 100%;
  }
  h1 {
    font-size: 5vw;
  }
  h1.outside {
    right: auto;
    top: -160px;
  }
  h1 svg {
    width: 5vw;
    height: 5vw;
  }
  canvas {
    width: 200px !important;
    height: 200px !important;
  }
  .album {
    margin-top: -100px;
    margin-right: 0;
  }
  .popup {
    left: 0;
    right: 0;
  }
  .popup.showing {
    padding-top: var(--spacing-m);
    margin-top: var(--spacing-s);
    height: 30vh;
    left: 0;
  }
  .waves {
    transform: scaleY(4);
  }
}

@media only screen and (max-width: 500px)  {
  h1 {
    font-size: 6vw;
  }
  h1 svg {
    width: 7vw;
    height: 7vw;
  }
}
@media only screen and (min-width: 1100px)  {
  .waves {
    bottom: -20vh;
  }
}