html, body {
  margin: 0;
  padding: 0;
  overflow: hidden;
  background: #101010;
}
canvas {
  display: block;
  padding: 0;
  margin: auto;
  display: block;
  width: 100%;
  height: 100%;
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  right: 0;
}