body {
  margin: 0;
  padding: 0;
  width: 100vw;
  height: 100vh;
  overflow: hidden;
  background: black;
  touch-action: none;
  display: grid;
}

canvas {
  --w: min(100vh, 100vw);
  margin: auto;
  height: var(--w) !important;
  width: var(--w) !important;
}