:root {
            --primary: #003366;
            --accent: #d8272f;
            --dark: #000;
            --light: #fff;
            --gray: #f4f4f4;
        }
        body { font-family: Arial, Helvetica, sans-serif; margin: 0; padding: 0; line-height: 1.6; color: #333; }
        header { background: var(--primary); color: var(--light); padding: 1rem 5%; display: flex; justify-content: space-between; align-items: center; }
        .logo-img { max-width: 200px; height: auto; }
        nav ul { list-style: none; display: flex; gap: 20px; padding: 0; }
        nav a { color: var(--light); text-decoration: none; font-weight: bold; }
        .hero { width: 100%; height: 400px; background: #004a59; display: flex; align-items: center; justify-content: center; color: white; text-align: center; }
        .hero-img { width: 100%; height: 100%; object-fit: cover; }
        .container { padding: 2rem 5%; max-width: 1200px; margin: auto; }
        .grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 20px; }
        .card { border: 1px solid #ddd; padding: 1rem; border-radius: 8px; transition: 0.3s; }
        .card:hover { box-shadow: 0 4px 15px rgba(0,0,0,0.1); }
        footer { background: var(--dark); color: var(--light); text-align: center; padding: 2rem; margin-top: 2rem; }
        @media (max-width: 768px) { nav ul { display: none; } }