html,
body,
body:after,
canvas {
  height: 100%;
  width: 100%;
  margin: 0;
  padding: 0;
  overflow: hidden;
}

/* stay put when ios tries to elastic scroll */
canvas,
body:after {
  position: fixed;
  top: 0;
  left: 0;
}

body:after {
  content: '';
  z-index: -1;
  /* background: #a9a89b;
  background: linear-gradient(45deg, #a9a89b, #76766d) */
}