*,*:after,*:before {
  -webkit-box-sizing: border-box;
  -moz-box-sizing: border-box;
  -ms-box-sizing: border-box;
  box-sizing: border-box;
}
body {
  font-family: arial;
  font-size: 16px;
  margin: 0;
  background: #002323;
  color: #fff;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: space-around;
}

.audio_player {
  width: 500px;
  box-shadow: 0 0 25px #00c3c3;
}

.player {
  background-color: #02131d;
  padding: 15px;
  box-shadow: 0 0 2px 2px #04c7c7 inset;
}

.audio_title { 
  color: #fff;
  font-weight: 400;
  font-size: 18px;
  display: block;
  margin-bottom: 20px;
}

.player-middle-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 10px;
}

.player-middle-left span {
  color: #00b0e4;
  font-size: 20px;
  display: inline-block;
  margin-right: 20px;
  cursor: pointer;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  text-align: center;
  line-height: 50px;
  box-shadow: 0 0 8px 4px #025656;
  transition: all 0.3s ease-out; 
  
  pointer-events: none;
  opacity: 0.3;
}

.player-middle-left span.active {
  pointer-events: auto;
  opacity: 1;
}

.player-middle-right span {
  font-size: 22px;
  color: #908e8e;
  display: block;
  text-align: left;
  font-weight: 700;
}

.audioPlaylistWrap {
  padding: 15px;
  background: linear-gradient(to bottom, #025656, #002d2d);
}
  
.audio-list {
  margin-bottom: 2px;
  position: relative;
}

.audio-list-in {
  background: #1f1b1b;
  color: #fff;
  font-size: 16px;
  padding: 10px 15px;
  position: relative;
  transition: all 0.4s ease-out;
}

.aTrigger {
  position: absolute;
  left: 0;
  top: 0;
  cursor: pointer;
  color: #fff;
  z-index: 1;
  width: 100%;
  height: 100%;
}

.aTrigger i {
  position: absolute;
  right: 15px;
  top: 50%;
  margin-top: -6px;
  font-size: 12px;
}

a[data-active="active"] + .audio-list-in,
a[data-active="pause"] + .audio-list-in {
  background: #00b0e4;