html,
body {
  margin: 0;
  padding: 0;
}

body {
  width: 100vw;
  height: 100vh;
  overflow: hidden;
  background: black;
}

#over {
  margin: auto;
  position: absolute;
  mix-blend-mode: difference;
  top: 0; left: 0; bottom: 0; right: 0;
  display: block;
  height: 100%;
  width:100%;
  z-index: 13;
}

#top {
  margin: auto;
  position: absolute;
  mix-blend-mode: screen;
  top: 0; left: 0; bottom: 0; right: 0;
  display: block;
  height: 100%;
  width:100%;
  z-index: 17;
}

#hydra {
    z-index: -1;
    height: 100%;
    width:auto;
}

#container {
  display: block;
  position: relative;
  width: 100%;
}