@-webkit-keyframes spinner {
  from {
    -webkit-transform: rotateY(0deg);
  }
  to {
    -webkit-transform: rotateY(-360deg);
  }
}

#stage {
  margin: 1em auto;
  -webkit-perspective: 1200px;
}

#spinner {
  -webkit-animation-name: spinner;
  -webkit-animation-timing-function: linear;
  -webkit-animation-iteration-count: infinite;
  -webkit-animation-duration: 6s;
  -webkit-transform-style: preserve-3d;
}
#spinner:hover {
  -webkit-animation-play-state: paused;
}

#spinner img {
  position: absolute;
  border: 1px solid #ccc;
  background: rgba(255,255,255,0.8);
  box-shadow: inset 0 0 20px rgba(0,0,0,0.2);
}