html, body { height: 100%; }
body {
  margin: 0;
  padding: 0;
  display: flex;
  justify-content: center;
  height: 100%;
  background-color: #000;
}

canvas {
  background: linear-gradient(
    180deg,
    #241e2c 0%,
    #2a2438 50%,
    #3d3550 100%
  );
  height: 100%;
  max-height: 100dvh;
  width: auto;
  max-width: 100%;
  touch-action: none;
}