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

canvas {
  display: block;
  width: 100vw;
  height: 100vh;
  height: 100dvh;
  object-fit: contain;
  cursor: none;
}