html, body {
  height: 100%;
}
body {
  margin: 0;
  background: #000;
  overflow: hidden;
  /* cursor: none; */
}
#avatar {
  position: absolute;
  left: 50%;
  top: 50%;
  transform-origin: 50% 50%;   /* center anchor */
  background-repeat: no-repeat;
  image-rendering: pixelated;
  pointer-events: none;
  /* transform is set by JS: translate(-50%, -50%) scale(SCALE) */
}