html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  background: #000;
  overflow: hidden;
  cursor: crosshair;
  -webkit-font-smoothing: antialiased;
  /* mobile: no scroll/zoom from gestures, the canvas drives the camera */
  touch-action: none;
  overscroll-behavior: none;
}
canvas {
  display: block;
  touch-action: none;
}