*,
*:before,
*:after {
  box-sizing: border-box;
}
html,
body {
  height: 100%;
}
body {
  font-family: sans-serif;
  background: #1d1f20;
  padding: 0;
  margin: 0;
  display: flex;
  justify-content: center;
  align-items: center;
}
img,
video {
  max-width: 100%;
  height: auto;
}
.audio-player {
  position: relative;
  width: 100%;
  height: 0;
  text-align: center;
  padding-bottom: 100%;
  background-color: #7726e4;
}
.audio-player video {
  opacity: 0;
  transition: opacity 300ms;
  will-change: opacity;
}
.audio-player:focus .audio-player__cover,
.audio-player:hover .audio-player__cover,
.audio-player.is-playing .audio-player__cover {
  opacity: 0.35;
}
.audio-player:focus .audio-player__title,
.audio-player:hover .audio-player__title,
.audio-player.is-playing .audio-player__title {
  opacity: 1;
  transform: translateY(0);
}
.audio-player:focus .audio-player__control-icon,
.audio-player:hover .audio-player__control-icon,
.audio-player.is-playing .audio-player__control-icon {
  transform: scale(1.15);
}
.audio-player.is-playing .audio-player__cover {
  opacity: 0;
}
.audio-player.is-playing video {
  opacity: 1;
}
.audio-player.is-playing .audio-player__control-icon:before {
  transform: translateY(0);
}
.audio-player.is-playing .audio-player__control-icon:after {
  transform: translateY(50px);
}
.audio-player__cover {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  right: 0;
  transition: opacity 350ms;
  will-change: opacity;
}
.audio-player__title {
  position: absolute;
  color: #fff;
  font-size: 22px;
  font-weight: 500;
  left: 10px;
  right: 10px;
  bottom: 0;
  top: 50%;
  padding-top: 50px;
  transform: translateY(-5%);
  z-index: 10;
  opacity: 0;
  transition: all 300ms;
  will-change: transform, opacity;
}
.audio-player__control {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  width: 100%;
  z-index: 20;
  border: none;
  background: none;
  cursor: pointer;
}
.audio-player__control:focus {
  outline: none;
}
.audio-player__control-icon {
  position: absolute;
  width: 65px;
  height: 65px;
  border-radius: 50%;
  border: 3px solid #fff;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  margin: auto;
  overflow: hidden;
  transition: all 250ms ease-out;
  transform: scale(1);
  will-change: transform;
}
.audio-player__control-icon::after,
.audio-player__control-icon::before {
  transition: all 200ms;
  will-change: transform;
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  left: 0;
  bottom: 0;
  margin: auto;
}
.audio-player__control-icon::after {
  left: 5px;
  width: 0;
  height: 0;
  border-top: 16px solid transparent;
  border-bottom: 16px solid transparent;
  border-left: 20px solid #fff;
  transform: translateY(0);
}
.audio-player__control-icon::before {
  width: 15px;
  height: 30px;
  border-right: 6px solid #fff;
  border-left: 6px solid #fff;
  transform: translateY(-50px);
}
.audio-players {
  list-style: none;
  margin: 0;
  padding: 0;
  text-align: center;
}
.audio-players li {
  display: inline-block;
  vertical-align: top;
  max-width: 300px;
  width: 300px;
  margin: 20px;
  position: relative;
}
.audio-players li .audio-guide-number {
  display: flex;
  align-items: center;
  justify-content: center;
  border: 3px solid #fff;
  border-radius: 50% !important;
  color: white;
  position: absolute;
  top: 10px;
  left: 10px;
  z-index: 10;
  width: 50px;
  height: 50px;
  font-size: 30px;
  text-align: center;
}