body {
            font-family: Arial, sans-serif;
            margin: 0;
            padding: 0;
            background: #f5f7fa;
            color: #222;
        }
        header {
            background: #ffffff;
            padding: 20px;
            border-bottom: 1px solid #e1e5ea;
        }
        header h1 {
            margin: 0;
            font-size: 24px;
        }
        .container {
            max-width: 900px;
            margin: 40px auto;
            padding: 0 20px;
        }
        footer {
            margin-top: 50px;
            padding: 20px;
            background: #fff;
            border-top: 1px solid #e1e5ea;
            text-align: center;
            font-size: 14px;
        }