html, body {
  margin: 0;
  height: 100%;
  background: #222222;
  overflow: hidden;
  overscroll-behavior: none;
}
#stage {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
  cursor: crosshair;
  touch-action: none;
}