:root {
            --primary: #006da3;
            --dark: #002f4b;
            --accent: #007ae6;
            --light: #f4f4f4;
            --text: #333;
        }

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

        header {
            background-color: var(--dark);
            color: white;
            padding: 1rem 5%;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .logo-container img {
            height: 48px;
            width: auto;
        }

        nav ul {
            display: flex;
            list-style: none;
            gap: 20px;
            margin: 0;
            padding: 0;
        }

        nav a {
            color: white;
            text-decoration: none;
            font-size: 0.9rem;
        }

        .hero {
            background: linear-gradient(rgba(0,47,75,0.8), rgba(0,47,75,0.8)), url('/assets/NtBox1000.jpg');
            background-size: cover;
            background-position: center;
            height: 400px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            text-align: center;
        }

        .container {
            max-width: 1000px;
            margin: 20px auto;
            padding: 0 20px;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 20px;
        }

        .card {
            background: white;
            padding: 15px;
            border-radius: 8px;
            box-shadow: 0 4px 6px rgba(0,0,0,0.1);
        }

        .card img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            border-radius: 4px;
        }

        footer {
            background: #000;
            color: white;
            text-align: center;
            padding: 2rem;
            margin-top: 40px;
        }

        @media (max-width: 768px) {
            header { flex-direction: column; gap: 1rem; }
            nav ul { flex-direction: column; align-items: center; }
        }