html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
}



canvas {
  display: black;
  max-width: 100vw;
  max-height: 100vh;
  bottom: 0;
  left: 0;
  right: 0;
  top: 0;
  margin: auto;
  overflow: hidden;
  position: fixed;
  object-fit: contain;
}