body {
      font-family: Arial, sans-serif;
      line-height: 1.6;
      max-width: 900px;
      margin: 0 auto;
      padding: 20px;
      background-color: #C0C0C0;
    }

    .top-box {
      display: flex;
      align-items: center;
      gap: 16px;
      margin-bottom: 24px;
    }

    h1 {
      margin: 0;
      font-size: 1.6rem;
    }
	
	html {
       font-size: 20px;
     }

    iframe {
      border: 1px solid #ddd;
      border-radius: 12px;
      margin: 20px 0;
      box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    }

    .summary-box {
      margin: 24px 0;
      padding: 20px;
      background: #ffffff;
      border-radius: 10px;
    }

    img.left {
      float: left;
      margin: 20px; 
    }