body {
  width: inherit;
  height: inherit;
  overflow: hidden;
}
canvas {
  width: inherit;
  height: inherit;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}
@media (min-aspect-ratio: 16 / 9) {
  canvas {
    max-width: 100%;
    height: auto;
  }
}
@media (max-aspect-ratio: 16 / 9) {
  canvas {
    max-height: 100%;
    width: auto;
  }
}