body {
  margin: 0;
  padding: 0;
}
#map {
  position: absolute;
  top: 0;
  bottom: 0;
  width: 100%;
}

.map-overlay {
  position: absolute;
  left: 0;
  padding: 10px;
}

.map-overlay-button {
  background-color: #5453A6;
  border: none;
  color: white;
  padding: 15px 32px;
  text-align: center;
  text-decoration: none;
  display: inline-block;
  font-size: 2em;
  margin: 4px 2px;
  cursor: pointer;
}