body {
  margin: 0;
  padding: 0;
}
#scroll-stage {
  height: 5000px;
}
#hero {
  -webkit-transform: translate(-50%, -50%);
  -moz-transform: translate(-50%, -50%);
  -ms-transform: translate(-50%, -50%);
  -o-transform: translate(-50%, -50%);
  transform: translate(-50%, -50%);
  position: fixed;
  top: 50%;
  left: 50%;
}