:root {
            --primary: #002752;
            --secondary: #0056b3;
            --accent: #007bff;
            --text: #000;
            --white: #fff;
            --gray: #f4f4f4;
        }

        * { box-sizing: border-box; margin: 0; padding: 0; }
        body { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif; line-height: 1.6; color: var(--text); }

        header { background: var(--white); border-bottom: 3px solid var(--primary); padding: 1rem; display: flex; justify-content: space-between; align-items: center; }
        .logo img { max-width: 200px; height: auto; }
        nav ul { display: flex; list-style: none; gap: 20px; }
        nav a { text-decoration: none; color: var(--primary); font-weight: bold; }

        .hero { 
            height: 400px; 
            background: linear-gradient(rgba(0,0,0,0.5), rgba(0,0,0,0.5)), url('/assets/700banner.png');
            background-size: cover;
            background-position: center;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--white);
            text-align: center;
        }

        main { max-width: 1200px; margin: 2rem auto; padding: 0 1rem; }
        .inventory-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 20px; }
        .card { border: 1px solid #ccc; border-radius: 8px; padding: 1rem; box-shadow: 0 2px 5px rgba(0,0,0,0.1); }
        .card img { width: 100%; border-radius: 4px; }

        footer { background: var(--primary); color: var(--white); text-align: center; padding: 2rem; margin-top: 2rem; }
        footer .logo { margin-bottom: 1rem; }

        @media (max-width: 768px) {
            nav ul { flex-direction: column; text-align: center; }
            .hero { height: 250px; }
        }