:root {
            --primary: #2563eb;
            --secondary: #b8860b;
            --dark: #1e293b;
            --light: #e2e8f0;
            --text: #334155;
        }

        * { box-sizing: border-box; margin: 0; padding: 0; }
        body { font-family: -apple-system, BlinkMacSystemFont, "Inter", sans-serif; line-height: 1.6; color: var(--text); background: #f8fafc; }
        
        header { background: #fff; padding: 1rem; border-bottom: 3px solid var(--secondary); display: flex; justify-content: space-between; align-items: center; }
        nav { display: flex; gap: 1rem; flex-wrap: wrap; }
        nav a { text-decoration: none; color: var(--dark); font-size: 0.9rem; font-weight: 600; }
        
        .hero { background: linear-gradient(135deg, var(--dark), var(--primary)); color: white; padding: 4rem 2rem; text-align: center; }
        .container { max-width: 1200px; margin: 0 auto; padding: 2rem; }
        
        .grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 2rem; margin-top: 2rem; }
        .card { background: white; padding: 1rem; border-radius: 8px; border: 1px solid #ddd; text-align: center; }
        .card img { max-width: 150px; height: auto; margin-bottom: 1rem; filter: grayscale(20%); transition: 0.3s; }
        .card img:hover { filter: grayscale(0%); }

        footer { background: var(--dark); color: white; text-align: center; padding: 2rem; margin-top: 4rem; }

        @media (min-width: 768px) { .nav-mobile { display: none; } }