body {
            margin: 0;
            font-family: Arial, sans-serif;
            background-color: #f4f6f8;
        }

        header {
            background-color: #2c3e50;
            color: white;
            text-align: center;
            padding: 20px;
        }

        nav {
            background-color: #34495e;
            padding: 10px;
            text-align: center;
        }

        nav a {
            color: white;
            margin: 0 15px;
            text-decoration: none;
            font-weight: bold;
        }

        section {
            padding: 30px;
            max-width: 900px;
            margin: auto;
        }

        .card {
            background: white;
            padding: 20px;
            margin: 20px 0;
            border-radius: 8px;
            box-shadow: 0 4px 8px rgba(0,0,0,0.1);
        }

        h2 {
            color: #2c3e50;
        }

        footer {
            background-color: #2c3e50;
            color: white;
            text-align: center;
            padding: 15px;
            margin-top: 30px;
        }

        button {
            background-color: #27ae60;
            color: white;
            border: none;
            padding: 10px 15px;
            border-radius: 5px;
            cursor: pointer;
        }

    button:hover {
        background-color: #219150;
    }