body {
            font-family: Arial, sans-serif;
            background: #f4f7f9;
            margin: 0;
            padding: 0;
            display: flex;
            flex-direction: column;
            min-height: 100vh;
          }
          header {
            background: black;
            color: white;
            padding: 20px;
            text-align: center;
            font-size: 24px;
            font-weight: bold;
          }
          main {
            flex: 1;
            max-width: 800px;
            margin: 30px auto;
            background: white;
            padding: 20px;
            border-radius: 12px;
            box-shadow: 0 4px 12px rgba(0,0,0,0.1);
          }
          h2 {
            margin-top: 0;
            color: #333;
            text-align: center;
          }
          ul {
            list-style: none;
            padding: 0;
          }
          li {
            background: #f9f9f9;
            margin: 10px 0;
            padding: 15px;
            border-radius: 8px;
            font-size: 18px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            box-shadow: 0 2px 4px rgba(0,0,0,0.05);
          }
          li span {
            color: #555;
          }
          footer {
            background: #333;
            color: #aaa;
            text-align: center;
            padding: 15px;
            font-size: 14px;
          }
          footer a {
            color: white;
            text-decoration: none;
          }