:root {
            --primary: #00669e;
            --secondary: #004a59;
            --accent: #ff6800;
            --text: #333;
            --light: #f4f4f4;
        }
        * { box-sizing: border-box; }
        body { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif; line-height: 1.6; color: var(--text); margin: 0; }
        header { background: #fff; border-bottom: 3px solid var(--primary); padding: 1rem; display: flex; align-items: center; justify-content: space-between; position: sticky; top: 0; z-index: 1000; }
        .logo { width: 150px; }
        nav { display: flex; gap: 15px; flex-wrap: wrap; }
        nav a { color: var(--primary); text-decoration: none; font-weight: bold; font-size: 0.9rem; }
        .hero { background: linear-gradient(rgba(0,102,158,0.7), rgba(0,74,89,0.7)), url('/assets/banner.jpg') center/cover; color: #fff; padding: 4rem 1rem; text-align: center; }
        .container { max-width: 1100px; margin: 0 auto; padding: 2rem; }
        .grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 2rem; }
        .card { background: #fff; padding: 1rem; border-radius: 8px; box-shadow: 0 4px 6px rgba(0,0,0,0.1); border: 1px solid #ddd; }
        .card img { width: 100%; height: 200px; object-fit: cover; border-radius: 4px; }
        footer { background: var(--secondary); color: #fff; text-align: center; padding: 2rem; margin-top: 2rem; }
        @media (min-width: 768px) { .nav-mobile { display: none; } }