:root {
            --primary: #004a99;
            --secondary: #007bbd;
            --text-dark: #222;
            --text-gray: #333;
            --border: #ccc;
            --bg-light: #f4f4f4;
            --white: #ffffff;
            --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
        }

        * { box-sizing: border-box; margin: 0; padding: 0; }
        body { font-family: var(--sans); color: var(--text-dark); line-height: 1.6; background: var(--bg-light); }

        header { background: var(--white); border-bottom: 3px solid var(--primary); padding: 1rem 5%; display: flex; justify-content: space-between; align-items: center; }
        .logo { font-size: 1.5rem; font-weight: bold; color: var(--primary); text-decoration: none; display: flex; align-items: center; gap: 10px; }
        .logo::before { content: ""; width: 40px; height: 40px; background: var(--secondary); border-radius: 50%; }

        nav ul { display: flex; list-style: none; gap: 20px; }
        nav a { text-decoration: none; color: var(--text-gray); font-weight: 500; }
        nav a:hover { color: var(--primary); }

        .hero { background: linear-gradient(135deg, var(--primary), var(--secondary)); color: var(--white); padding: 4rem 5%; text-align: center; }
        .hero h1 { font-size: 2.5rem; margin-bottom: 1rem; }

        main { max-width: 1000px; margin: 2rem auto; padding: 0 5%; background: var(--white); min-height: 50vh; padding-top: 2rem; }

        footer { background: var(--text-dark); color: var(--white); text-align: center; padding: 2rem; margin-top: 2rem; font-size: 0.9rem; }

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