body,
    html {
      margin: 0;
      padding: 0;
      display: block;
      width: 100vw;
      height: 100vh;
      overflow: hidden;
      background-color: #000000;
    }
 canvas {
      max-width: 100%;
      max-height: 100%;
      bottom: 0;
      left: 0;
      margin: auto;
      overflow: auto;
      position: fixed;
      right: 0;
      top: 0;
      object-fit: contain;
    }