:root {
        --primary: #004a59;
        --accent: #02ab6c;
        --dark: #00160a;
        --light: #f4f7f6;
        --white: #ffffff;
    }
    body { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif; line-height: 1.6; color: #333; margin: 0; }
    header { background: var(--primary); color: var(--white); padding: 2rem; display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; }
    .logo-container { font-size: 1.5rem; font-weight: bold; }
    nav ul { list-style: none; padding: 0; display: flex; gap: 1.5rem; flex-wrap: wrap; }
    nav a { color: var(--white); text-decoration: none; font-size: 0.9rem; }
    .hero { background: linear-gradient(rgba(0,30,40,0.7), rgba(0,30,40,0.7)), url('/assets/david-clode-a0F4kX9nLBU-unsplash-212x300.jpg') center/cover; height: 300px; display: flex; align-items: center; justify-content: center; color: white; text-align: center; }
    main { max-width: 1000px; margin: 2rem auto; padding: 0 1rem; display: grid; grid-template-columns: 1fr 300px; gap: 2rem; }
    section { padding: 1rem; border: 1px solid #ddd; }
    .sidebar { background: #f9f9f9; padding: 1rem; }
    footer { background: var(--dark); color: white; text-align: center; padding: 2rem; margin-top: 2rem; }
    .icon { width: 24px; height: 24px; fill: currentColor; display: inline-block; }
    @media (max-width: 768px) { main { grid-template-columns: 1fr; } }