:root {
            --primary-color: #2c3e50; /* Deep Professional Blue */
            --accent-color: #d4af37;  /* Elegant Gold */
            --text-dark: #333;
            --light-bg: #f9f9f9;
            --white: #ffffff;
        }

        * { box-sizing: border-box; margin: 0; padding: 0; }
        body { font-family: 'Open Sans', sans-serif; line-height: 1.6; color: var(--text-dark); overflow-x: hidden; }
        h1, h2, h3 { font-family: 'Montserrat', sans-serif; font-weight: 700; }
        a { text-decoration: none; transition: 0.3s; }
        ul { list-style: none; }

        /* --- HEADER --- */
        header {
            background: var(--white);
            padding: 1rem 5%;
            display: flex;
            justify-content: space-between;
            align-items: center;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
        }
        .logo { font-size: 1.5rem; font-weight: 700; color: var(--primary-color); }
        .logo span { color: var(--accent-color); }
        nav ul { display: flex; gap: 20px; }
        nav ul li a { color: var(--text-dark); font-weight: 600; font-size: 0.9rem; }
        nav ul li a:hover { color: var(--accent-color); }
        .cta-btn { background: var(--primary-color); color: white; padding: 10px 20px; border-radius: 5px; font-weight: bold; }
        .cta-btn:hover { background: var(--accent-color); }

        /* --- HERO SECTION --- */
        .hero {
            background: linear-gradient(rgba(0,0,0,0.6), rgba(0,0,0,0.6)), url('../images/hero.webp');
            background-size: cover;
            background-position: center;
            height: 80vh;
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            text-align: center;
            color: white;
            padding: 0 20px;
        }
        .hero h1 { font-size: 3.5rem; margin-bottom: 1rem; }
        .hero p { font-size: 1.2rem; max-width: 800px; margin-bottom: 2rem; }
        .hero-btns { display: flex; gap: 15px; }
        .btn-gold { background: var(--accent-color); color: white; padding: 15px 30px; border-radius: 5px; font-size: 1.1rem; border: none; cursor: pointer;}
        .btn-outline { border: 2px solid white; color: white; padding: 15px 30px; border-radius: 5px; }

        /* --- SECTIONS GENERAL --- */
        section { padding: 80px 10%; }
        .section-title { text-align: center; margin-bottom: 50px; }
        .section-title h2 { font-size: 2.5rem; color: var(--primary-color); }
        .section-title div { height: 4px; width: 60px; background: var(--accent-color); margin: 10px auto; }

        /* --- SERVICES GRID --- */
        .services-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 30px;
        }
        .service-card {
            background: var(--white);
            padding: 30px;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            text-align: center;
            transition: transform 0.3s;
        }
        .service-card:hover { transform: translateY(-10px); }
        .service-card i { font-size: 2rem; color: var(--accent-color); margin-bottom: 15px; display: block; }

        /* --- WARRANTY SECTION --- */
        .warranty { background: var(--primary-color); color: white; }
        .warranty h2 { color: var(--accent-color); }

        /* --- FORM --- */
        .contact-container { display: flex; flex-wrap: wrap; gap: 50px; }
        .contact-info { flex: 1; min-width: 300px; }
        .contact-form { flex: 1; min-width: 300px; background: var(--light-bg); padding: 40px; border-radius: 10px; }
        .form-group { margin-bottom: 15px; }
        .form-group input, .form-group select, .form-group textarea {
            width: 100%; padding: 12px; border: 1px solid #ddd; border-radius: 5px; outline: none;
        }
        .error-msg { color: red; font-size: 0.8rem; display: none; }

        /* --- MODALS (Popups) --- */
        .modal {
            display: none; position: fixed; z-index: 2000; left: 0; top: 0; width: 100%; height: 100%;
            background-color: rgba(0,0,0,0.7);
        }
        .modal-content {
            background-color: white; margin: 10% auto; padding: 40px; border-radius: 10px; width: 50%;
            position: relative; max-height: 80vh; overflow-y: auto;
        }
        .close-modal { position: absolute; top: 15px; right: 20px; font-size: 30px; cursor: pointer; }

        /* --- FOOTER --- */
        footer { background: #1a1a1a; color: #ccc; padding: 50px 10%; }
        .footer-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 40px; }
        .footer-bottom { text-align: center; border-top: 1px solid #333; margin-top: 40px; padding-top: 20px; }

        @media (max-width: 768px) {
            .hero h1 { font-size: 2.2rem; }
            nav { display: none; } /* Mobile menu would go here */
            .modal-content { width: 90%; }
        }