html,
body {
  margin: 0;
  height: 100%;
  background: #000;
  overflow: hidden;
  -webkit-user-select: none;
  user-select: none;
  -webkit-touch-callout: none;
}

body {
  display: grid;
  place-items: center;
}

/* Het canvas schaalt in hele pixels (zie resize() in game.js) en blijft scherp */
#screen {
  display: block;
  image-rendering: crisp-edges;
  image-rendering: pixelated;
  cursor: crosshair;
}