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

body {
  display: grid;
  place-items: center;
  background: #f4f4f4;
}

canvas {
  display: block;
  width: min(100vw, 76.923077vh) !important;
  height: min(100vh, 130vw) !important;
}