:root {
            --primary: #004a55;
            --dark: #121212;
            --light: #ffffff;
            --accent: #2c3e50;
            --font: 'Assistant', sans-serif;
        }
        * { box-sizing: border-box; }
        body { font-family: var(--font); margin: 0; color: #333; line-height: 1.6; }
        header { padding: 2rem; background: var(--light); display: flex; justify-content: space-between; align-items: center; border-bottom: 2px solid #eee; }
        nav ul { display: flex; list-style: none; gap: 1.5rem; padding: 0; }
        nav a { text-decoration: none; color: var(--dark); font-weight: bold; }
        .hero { padding: 4rem 2rem; background: #f4f4f4; text-align: center; }
        .card-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 2rem; padding: 2rem; }
        .card { border: 1px solid #ddd; padding: 1rem; text-align: center; border-radius: 8px; }
        .product-img { width: 100%; height: 200px; background: #ddd; display: flex; align-items: center; justify-content: center; margin-bottom: 1rem; border-radius: 4px; }
        img { max-width: 100%; height: auto; }
        footer { padding: 2rem; background: var(--dark); color: white; text-align: center; margin-top: 2rem; }
        @media (max-width: 768px) { nav { display: none; } }