:root {
        --primary-green: #008a20;
        --secondary-teal: #29c4a9;
        --dark-text: #222222;
        --nav-hover: #187011;
        --bg-gray: #f8f8f8;
    }
    body {
        font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
        line-height: 1.6;
        color: #333;
        margin: 0;
        padding: 0;
    }
    header {
        background: #fff;
        padding: 20px;
        border-bottom: 3px solid var(--primary-green);
        display: flex;
        justify-content: space-between;
        align-items: center;
        flex-wrap: wrap;
    }
    .logo {
        max-width: 250px;
    }
    nav ul {
        display: flex;
        list-style: none;
        gap: 20px;
        margin: 0;
        padding: 0;
    }
    nav a {
        color: var(--dark-text);
        text-decoration: none;
        font-weight: 600;
        font-size: 0.9em;
    }
    nav a:hover { color: var(--primary-green); }
    
    .hero {
        background-color: #e8f5e9;
        padding: 60px 20px;
        text-align: center;
    }
    .hero-img {
        max-width: 100%;
        height: auto;
        border-radius: 8px;
        box-shadow: 0 4px 15px rgba(0,0,0,0.1);
    }
    
    .container {
        max-width: 1080px;
        margin: auto;
        padding: 40px 20px;
    }
    .grid {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
        gap: 30px;
    }
    .card {
        padding: 20px;
        border: 1px solid #eee;
        border-radius: 8px;
    }
    footer {
        background: var(--dark-text);
        color: #fff;
        text-align: center;
        padding: 40px;
        margin-top: 50px;
    }
    
    @media (max-width: 768px) {
        nav ul { flex-direction: column; align-items: center; }
    }