html,
body {
  overflow: hidden;
}

body {
  margin: 0;
  position: absolute;
  width: 100%;
  height: 100%;
}

#container {
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 100%;
  height: 100%;
}

canvas {
  width: 100%;
  height: 100%;
}