html {
      margin: 0;
      height: 100%;
      overflow: hidden;
      background-color: #ffffff;
    }

    body {
      margin: 0;
      height: 100%;
      background-color: transparent;
    }

    iframe {
      position: absolute;
      top: 0;
      right: 0;
      bottom: 0;
      left: 0;
      width: 100%;
      height: 100%;
      border: 0;
      z-index: 1;
      background: transparent;
    }

    .quiz-logo-overlay {
      position: absolute;
      top: 60px;
      left: 10px;
      width: 110px;
      height: 70px;
      z-index: 10;
      cursor: pointer;
      background: transparent;
      display: block;
    }

    @media (min-width: 768px) {
      .quiz-logo-overlay {
        left: calc(50% - 360px);
        width: 110px;
      }
    }