html, body {
      width: 100%;
      height: 100%;
      margin: 0px;
      border: 0;
      overflow: hidden; /*  Disable scrollbars */
      display: block;  /* No floating content on sides */
    }
    canvas {outline: none; height: 300px; width: 600px} /* 2:1 aspect ratio */
h1 {font-family: sans-serif; text-align:left; font-size: 16px;}