html,
  body {
      margin: 0;
      height: 100%;
      overflow: hidden;
      background: #157970;
      color: #fff;
  }

  #flipbook {
      width: 100vw;
      height: 100vh;
  }

  .page {
      background: #157970;
      color: #fff;
      width: 100%;
      height: 100%;
      overflow: hidden;
  }

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