ami.js/lessons/03/demo.css

<p align="center"> <img src="https://cloud.githubusercontent.com/assets/214063/23213764/78ade038-f90c-11e6-8208-4fcade5f3832.png" width="60%"> </p>

body{
  font-family: source-code-pro, sans-serif;
  color:#F9F9F9;
  background-color: #212121
}

#container {
  background-color: #000;
  left: 0;
  right: 0;
  top: 0;
  bottom: 0;
  position: absolute;
  width: 100%;
  height: 100%;
  overflow:hidden;
}

#my-gui-container {
  position: fixed;
  top: 10px;
  right: 10px;
  z-index:1;
}