html,
body {
  width: 100%;
  height: 100%;
  margin: 0px;
  padding: 0px;
  text-align: center;
}

body {
  overflow: hidden;
  touch-action: none;
  background: #111;
}

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

canvas {
  width: auto !important;
  height: auto !important;
  max-width: 100% !important;
  max-height: 100% !important;
}