html {
  height: 100vh;
}

body {
  height: 5000px;
  background: #d8d3d0;
}

canvas {
  position: fixed;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  /* max-width: 100vw; */
  /* max-height: 100vh; */
}