body {
            font-family: Arial, sans-serif;
            margin: 0;
            padding: 0;
            background-color: #f4f4f4;
        }
        header {
            background: #333;
            color: white;
            padding: 1rem;
            text-align: center;
        }
        .container {
            max-width: 900px;
            margin: auto;
            padding: 2rem;
            background: white;
            box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
        }
        .card-container {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 20px;
        }
        .card {
            background: #fff;
            border-radius: 8px;
            box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
            overflow: hidden;
            width: 280px;
            text-align: center;
            padding: 15px;
        }
        .card img {
            width: 100%;
            height: 150px;
            object-fit: cover;
            border-radius: 5px;
        }
        h1, h2 {
            text-align: center;
        }
        nav {
            display: flex;
            justify-content: center;
            background: #444;
        }
        nav a {
            color: white;
            padding: 1rem;
            text-decoration: none;
        }
        nav a:hover {
            background: #555;
        }