body {
  font: 2em/1 monospace;
  margin: 1em;
}
.player {
  display: grid;
  grid-template-columns: auto 1fr auto auto auto;
  grid-template-rows: auto auto;
  grid-gap: 1em;
  align-items: center;
  padding: 1em;
  border: 1px solid #ddd;
  border-radius: 0.5em;
  background-color: #eee;
}
.playing {
  animation-play-state: running;
}
.controls {
  display: flex;
  gap: 0.125em;
}
.play-pause {
  padding: 0;
  margin: 0;
  border: 0;
  font-size: 2em;
  line-height: 1;
  vertical-align: middle;
  background-color: transparent;
}
.next-prev {
  border: none;
  padding: 0;
  vertical-align: middle;
}
.track-name, .track-artist, .track-time, .track-duration {
  display: block;
}
.track-time {
  border-bottom: 2px solid rgba(0,0,0,0.5);
}
.track-image {
  aspect-ratio: 1;
  object-fit: cover;
  height: 5em;
  grid-row: 1 / -1;
  grid-column: -3;
}
.track-volume {
  -webkit-appearance: slider-vertical;
  font-size: inherit;
  width: 14px;
  height: 5em;
  grid-row: 1 / -1;
  grid-column: -2;
}
.track-progress {
  grid-row: 2;
  grid-column: 1 / -3;
}

.playlist > li {
  border-bottom: 1px solid rgba(0,0,0,0.1);
  line-height: 1;
  padding: 0.5em;
  border-left: 0.25em solid transparent;
}
.playlist > li.loaded {
  border-left-color: royalblue;
}
.playlist > li:first-child {
  border-top: 1px solid rgba(0,0,0,0.1);
}
.playlist > li:hover {
  background-color: rgba(0,0,0,0.1);
}
.playlist > li::before {
  content: "\2023";
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-right: 1em;
  border: 2px solid black;
  border-radius: 50%;
  line-height: 0.9;
  width: 1.35em;
  height: 1.35em;
  cursor: pointer;
}

@keyframes timer {
  from {
    background-position-x: 100%;
  }
  to {
    background-position-x: 0%;
  }
}

@media screen and (min-width: 60rem) {
  .track-time, .track-duration, .track-name, .track-artist {
    display: inline-block;
    border: none;
  }
  .track-time::after {
    content: "/";
    font-weight: 100;
  }
  .track-name::after {
    content: " - ";
    font-weight: 100;
  }
}