* {
  margin: 0;
  padding: 0;
}
body {
  background-color: black;
  color: #666;
  text-align: center;
}
audio {
  width: 450px;
  margin: 30px 0;
}

.container {
  height: 500px;
  overflow: hidden;
  /* border: 2px solid #666; */
}
.container ul {
  /* border: 2px solid #666; */
  transition: 0.6s;
  list-style: none;
}
.container li {
  height: 30px;
  /* border: 1px solid #666; */
  line-height: 30px;
  transition: 0.2s;
}

.container li.active {
  color: white;
  /* font-size: 2em; */
  transform: scale(1.5);
}