:root {
            --primary: #004a59;
            --accent: #02ab6c;
            --text: #1e1f26;
            --white: #ffffff;
            --light: #f4f4f4;
        }

        body { font-family: 'Poppins', sans-serif; margin: 0; color: var(--text); line-height: 1.6; }
        header { background: var(--primary); color: var(--white); padding: 1rem 5%; display: flex; justify-content: space-between; align-items: center; }
        .logo { font-size: 1.5rem; font-weight: bold; }
        nav a { color: var(--white); text-decoration: none; margin-left: 20px; font-size: 0.9rem; }
        
        .hero { background: var(--accent); padding: 4rem 5%; text-align: center; color: var(--white); }
        .grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 20px; padding: 2rem 5%; }
        .card { border: 1px solid #ddd; padding: 1rem; border-radius: 8px; transition: 0.3s; }
        .card:hover { box-shadow: 0 5px 15px rgba(0,0,0,0.1); }
        .image-placeholder { height: 180px; width: 100%; background: #eee; background-size: cover; background-position: center; margin-bottom: 1rem; border-radius: 4px; }
        
        footer { background: var(--text); color: var(--white); text-align: center; padding: 2rem; }
        
        @media (max-width: 768px) { nav { display: none; } .grid { grid-template-columns: 1fr; } }