body {
  margin: 0;
  font-size: 14px;
  font-family: sans-serif;
}
#scene {
  position: fixed;
  top: 0;
  left: 0;
  display: block;
  z-index: 1;
}

#controls {
  position: fixed;
  z-index: 10;
  top: 5px;
  left: 5px;
  border: 1px #efefef solid;
  background: #fff;
  padding: 6px 10px;
  user-select: none;
        -moz-user-select: none;
        -khtml-user-select: none;
        -webkit-user-select: none;
        -o-user-select: none;
}

button {
  color: #333;
  font-size: 14px;
  font-family: sans-serif;
}