html, body {
      margin: 0;
      padding: 0;
      font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
      background-color: #fff;
      color: #333;
      height: auto;
    }

    .mobile-wrapper {
      display: block;
      min-height: calc(100vh + 40px);
    }

    iframe {
      display: block;
      width: 100%;
      height: 100vh;
      border: none;
    }

    .footer {
      height: 40px;
      background-color: #fff;
      text-align: center;
      line-height: 40px;
      font-size: 14px;
      color: #fff;
    }

    .footer a {
      color: #fff;
      text-decoration: none;
    }

    .footer a:hover {
      text-decoration: underline;
    }

    @media (min-width: 601px) {
      body {
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: flex-start;
        min-height: 100vh;
      }

      .mobile-wrapper {
        width: 120vmin;
        height: calc(90vmin - 40px);
        margin-top: 20px;
        box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
        border-radius: 12px;
        overflow: hidden;
        min-height: auto;
      }

      iframe {
        height: 100%;
      }

      .footer {
        width: 120vmin;
      }
    }