html, body {
      height: 100%;
      margin: 0;
      padding: 0;
    }

    html {
      background: url(hans.png) no-repeat center center fixed;
      background-color: #BE1D2D;
      background-size: auto 20%;
    }

    body {
      overflow: hidden;
      display: none;
    }

    #overlay {
      position: fixed;
      top: 0;
      left: 0;
      width: 100vw;
      height: 100vh;
      background-color: rgba(255, 255, 255, 0);
      z-index: 9999;
      cursor: not-allowed; 
    }