html,
body {
  margin: 0;
  padding: 0;
  width: 100%;
  height: 100%;
  background: #000;
  overflow: hidden;
}

main {
  display: flex;
  justify-content: center;
  align-items: center;
  width: 100vw;
  height: 100vh;
}

canvas {
  display: block;
  /* Fullscreen but maintain aspect ratio ~ colin */
  width: auto !important;
  height: auto !important;
  max-width: 100%;
  max-height: 100%;
  aspect-ratio: 16 / 9;
}