:root {
            --primary: #000;
            --secondary: #004a59;
            --accent: #00b3ff;
            --gray: #777;
            --light: #f4f4f4;
            --white: #fff;
        }

        * { box-sizing: border-box; margin: 0; padding: 0; }
        body { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif; line-height: 1.6; color: var(--primary); }
        
        header { background: var(--white); padding: 1rem 5%; display: flex; justify-content: space-between; align-items: center; border-bottom: 1px solid var(--light); position: sticky; top: 0; z-index: 1000; }
        .logo { height: 50px; }
        nav ul { display: flex; list-style: none; gap: 20px; }
        nav a { text-decoration: none; color: var(--gray); font-size: 0.9rem; font-weight: 600; }
        
        .hero { background: linear-gradient(rgba(0,0,0,0.5), rgba(0,0,0,0.5)), url('/assets/albert-stephens-KGOze95_WPw-unsplash.jpg'); background-size: cover; background-position: center; height: 400px; display: flex; align-items: center; justify-content: center; color: var(--white); text-align: center; }
        
        .container { max-width: 1200px; margin: 2rem auto; padding: 0 1rem; }
        .grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 2rem; }
        
        .card { border: 1px solid var(--light); padding: 1rem; transition: 0.3s; }
        .card img { width: 100%; height: 200px; object-fit: cover; }
        .card h3 { margin: 1rem 0; }
        
        footer { background: var(--primary); color: var(--white); text-align: center; padding: 2rem; margin-top: 3rem; }

        @media (max-width: 768px) { nav { display: none; } }