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

  body {
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: row;
    margin: 0;
  }

  canvas {
    margin: auto;
    display: block;
  }