* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

#osm-map {
  height: 100vh;
}

#timeline {
  background: white;
  border: 2px solid black;
  border-radius: 5px;
  left: 0;
  height: calc(100vh - 2em);
  margin: 1em;
  padding: 0.25em;
  position: fixed;
  top: 0;
  width: 30vw;
  z-index: 400;
}

#timeline {
  display: flex;
  flex-direction: column;
}

#locations {
  flex: 1;
}

#controls {
  display: flex;
  flex-direction: column;
}

#controls button {
  margin: 0.5em;
  padding: 0.25em;
}