html, body {
  height: 100%;
  margin: 0;
}

body {
  background: #ffffff;
}

canvas#bg {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
  z-index: -1;
  image-rendering: pixelated; /* crisp squares */
  pointer-events: none;
}