* {

}
.body {
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: row;
  background: linear-gradient(
      0deg,
      rgba(0, 0, 64, 0.5),
      rgba(64, 64, 128, 0.5)
    );
  padding: 0;
}
canvas {
  display: block;
}
.timeline {
  display: flex;
  flex-direction: row;
  position: relative;
  width: 300px;
  cursor: crosshair;
}

.ticks .tick {
  position: absolute;
  right: 0;
  width: 4px;
  height: 1px;
  background: #ddd;
}
.ticks .tickLabel {
  position: absolute;
  right: 6px;
  font-size: 12px;
  width: 40px;
  margin-top: -7px;
  text-align: right;
  text-shadow: 0 0 2px #00f;
}
.timeline .cursor {
  width: 100%;
  position: absolute;
  left: 0;
  pointer-events: none;
}
.timeline .cursor .line {
  width: 100%;
  height: 1px;
  background: #00f;
}
.timeline .cursor.playCursor .line {
  background: #ddd;
}
.timeline .cursor .tickLabel {
  position: absolute;
  pointer-events: none;
  right: 6px;
  font-size: 12px;
  width: 40px;
  margin-top: -7px;
  text-align: right;
  text-shadow: 0 0 2px #000, 0 0 2px #000, 0 0 2px #000; 
}
.playButton {
  position: absolute;
  top: 0; left: 0;
  width: 3rem; height: 3rem;
  padding: 1rem;
  background: #000;
  cursor: pointer;
  background-size: contain;
  background-repeat: no-repeat;
  background-position: center;
}
.playButton.playing {
  background-image: url('/static/img/icons_pause_white.svg');
}
.playButton.paused {
  background-image: url('/static/img/icons_play_white.svg');
}