body {
    margin: 0;
    padding: 0;
    position: relative;
  }

  #overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 9999;
    cursor: pointer;
  }

  #tb-iframe-wrapper {
    z-index: 1;
  }