body {
  margin: 0;
  overflow: hidden;
  font-family: sans-serif;
}

#timeline-wrapper {
  width: 100vw;
  height: 100vh;
  overflow: hidden;
  position: relative;
  background: #f4f4f4;
}

#timeline {
  position: absolute;
  top: 50%;
  left: 0;
  height: 2px;
  background: black;
  transform: translateY(-50%);
}

.event {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background: steelblue;
  color: white;
  padding: 4px 6px;
  font-size: 12px;
  border-radius: 4px;
  white-space: nowrap;
  cursor: pointer;
}

.event.range {
  background: rgba(70,130,180,0.6);
  height: 24px;
  line-height: 24px;
}

.tooltip {
  position: absolute;
  background: white;
  border: 1px solid #ccc;
  padding: 10px;
  font-size: 14px;
  pointer-events: none;
  z-index: 100;
  max-width: 300px;
  display: none;
}