:root {
            --primary-color: #1a3a5f; /* Deep, professional blue */
            --secondary-color: #0d6efd; /* Brighter blue for links */
            --accent-color: #28a745; /* Trustworthy green for CTAs */
            --light-color: #f8f9fa;
            --dark-color: #333;
            --text-color: #555;
            --border-color: #e0e0e0;
            --shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
            --font-family: 'Poppins', sans-serif;
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-family);
            line-height: 1.6;
            color: var(--text-color);
            background-color: #fff;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        h1, h2, h3 {
            color: var(--primary-color);
            line-height: 1.2;
            margin-bottom: 1rem;
        }

        h1 { font-size: 2.8rem; font-weight: 700; }
        h2 { font-size: 2.2rem; font-weight: 600; text-align: center; margin-bottom: 2.5rem; }
        h3 { font-size: 1.5rem; font-weight: 600; }
        p { margin-bottom: 1rem; }
        a { text-decoration: none; color: var(--secondary-color); }
        ul { list-style: none; }

        /* --- Buttons --- */
        .btn {
            display: inline-block;
            padding: 12px 28px;
            border-radius: 50px;
            font-weight: 600;
            text-align: center;
            transition: all 0.3s ease;
            border: none;
            cursor: pointer;
            font-size: 1rem;
        }

        .btn-primary {
            background-color: var(--accent-color);
            color: #fff;
        }
        .btn-primary:hover {
            background-color: #218838;
            transform: translateY(-2px);
            box-shadow: 0 5px 15px rgba(40, 167, 69, 0.3);
        }

        .btn-secondary {
            background-color: transparent;
            color: var(--primary-color);
            border: 2px solid var(--primary-color);
        }
        .btn-secondary:hover {
            background-color: var(--primary-color);
            color: #fff;
        }
        
        .section-padding { padding: 80px 0; }
        .text-center { text-align: center; }

        /* --- Header --- */
        .header {
            background-color: #fff;
            box-shadow: 0 2px 10px rgba(0,0,0,0.05);
            position: fixed;
            width: 100%;
            top: 0;
            z-index: 1000;
        }
        .header-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 1rem 0;
        }
        .logo {
            display: flex;
            align-items: center;
            font-weight: 700;
            font-size: 1.5rem;
            color: var(--primary-color);
        }
        .logo i {
            margin-right: 10px;
            color: var(--accent-color);
        }
        .logo span {
            font-size: 0.9rem;
            font-weight: 400;
            color: var(--text-color);
            display: block;
            line-height: 1;
        }

        nav ul {
            display: flex;
        }
        nav ul li {
            margin-left: 25px;
        }
        nav ul li a {
            color: var(--dark-color);
            font-weight: 500;
            transition: color 0.3s ease;
        }
        nav ul li a:hover {
            color: var(--secondary-color);
        }

        .header-cta .btn {
            margin-left: 15px;
        }
        .mobile-menu-btn {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            color: var(--primary-color);
            cursor: pointer;
        }

        /* --- Hero Section --- */
        .hero {
            background: linear-gradient(rgba(26, 58, 95, 0.85), rgba(26, 58, 95, 0.85)), url('../img/hero.jpg') no-repeat center center/cover;
            color: #fff;
            padding: 150px 0 100px;
            text-align: center;
        }
        .hero h1 {
            color: #fff;
            font-size: 3.2rem;
            margin-bottom: 1rem;
        }
        .hero p {
            font-size: 1.3rem;
            max-width: 700px;
            margin: 0 auto 2rem auto;
            color: #e0e0e0;
        }
        .hero-features {
            display: flex;
            justify-content: center;
            gap: 30px;
            margin-bottom: 2rem;
            font-weight: 500;
        }
        .hero-buttons .btn {
            margin: 0 10px;
        }
        
        /* --- About Section --- */
        .about-preview { background-color: var(--light-color); }
        .about-content {
            max-width: 800px;
            margin: 0 auto;
            text-align: center;
        }
        .mission {
            font-style: italic;
            color: var(--primary-color);
            font-weight: 500;
            margin-top: 1.5rem;
        }

        /* --- Why Choose Us --- */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 30px;
        }
        .feature-card {
            background-color: #fff;
            padding: 30px;
            border-radius: 10px;
            box-shadow: var(--shadow);
            text-align: center;
            transition: transform 0.3s ease;
        }
        .feature-card:hover {
            transform: translateY(-10px);
        }
        .feature-card i {
            font-size: 3rem;
            color: var(--accent-color);
            margin-bottom: 1rem;
        }
        .feature-card h3 {
            font-size: 1.3rem;
        }

        /* --- Services Section --- */
        .services { background-color: var(--light-color); }
        .services-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(380px, 1fr));
            gap: 40px;
        }
        .service-category {
            background-color: #fff;
            padding: 30px;
            border-radius: 10px;
            box-shadow: var(--shadow);
        }
        .service-category h3 {
            margin-bottom: 1.5rem;
            padding-bottom: 1rem;
            border-bottom: 2px solid var(--light-color);
        }
        .service-category ul li {
            padding: 8px 0;
            border-bottom: 1px dashed var(--border-color);
        }
        .service-category ul li:last-child {
            border-bottom: none;
        }
        .service-category ul li i {
            color: var(--accent-color);
            margin-right: 10px;
        }
        
        /* --- Testimonials Section --- */
        .testimonial-slider {
            max-width: 800px;
            margin: 0 auto;
            text-align: center;
        }
        .testimonial {
            background-color: #fff;
            padding: 30px;
            border-radius: 10px;
            box-shadow: var(--shadow);
            margin-bottom: 20px;
        }
        .stars {
            color: #ffc107;
            font-size: 1.2rem;
            margin-bottom: 1rem;
        }
        .testimonial p {
            font-style: italic;
            font-size: 1.1rem;
            margin-bottom: 1rem;
        }
        .testimonial h4 {
            color: var(--primary-color);
            font-weight: 600;
        }
        
        /* --- FAQ Section --- */
        .faq { background-color: var(--light-color); }
        .faq-container {
            max-width: 800px;
            margin: 0 auto;
        }
        .faq-item {
            background-color: #fff;
            margin-bottom: 15px;
            border-radius: 8px;
            overflow: hidden;
            box-shadow: var(--shadow);
        }
        .faq-question {
            padding: 20px;
            font-size: 1.1rem;
            font-weight: 600;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .faq-question i {
            transition: transform 0.3s ease;
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease-out;
            padding: 0 20px;
        }
        .faq-item.active .faq-answer {
            max-height: 500px;
            padding: 0 20px 20px;
        }
        .faq-item.active .faq-question i {
            transform: rotate(180deg);
        }

        /* --- Contact Form --- */
        .contact-form {
            max-width: 700px;
            margin: 0 auto;
            background-color: #fff;
            padding: 40px;
            border-radius: 10px;
            box-shadow: var(--shadow);
        }
        .form-group {
            margin-bottom: 20px;
        }
        .form-group label {
            display: block;
            margin-bottom: 8px;
            font-weight: 500;
        }
        .form-group input,
        .form-group select,
        .form-group textarea {
            width: 100%;
            padding: 12px;
            border: 1px solid var(--border-color);
            border-radius: 5px;
            font-family: var(--font-family);
        }
        .form-group textarea {
            resize: vertical;
            min-height: 120px;
        }
        .form-message {
            display: none;
            padding: 15px;
            background-color: #d4edda;
            color: #155724;
            border-radius: 5px;
            text-align: center;
            margin-top: 20px;
        }

        /* --- Newsletter Section --- */
        .newsletter { background-color: var(--primary-color); color: #fff; }
        .newsletter h2 { color: #fff; }
        .newsletter-form {
            max-width: 600px;
            margin: 0 auto;
            display: flex;
            flex-wrap: wrap;
            gap: 15px;
            align-items: center;
        }
        .newsletter-form input {
            flex: 1;
            min-width: 200px;
            padding: 12px;
            border: 1px solid rgba(255,255,255,0.3);
            background-color: rgba(255,255,255,0.1);
            color: #fff;
            border-radius: 5px;
        }
        .newsletter-form input::placeholder { color: rgba(255,255,255,0.7); }
        .newsletter-form .checkbox-group {
            display: flex;
            align-items: center;
            width: 100%;
        }
        .newsletter-form .checkbox-group input {
            width: auto;
            margin-right: 10px;
        }
        .newsletter-message {
            display: none;
            padding: 15px;
            background-color: rgba(255,255,255,0.2);
            color: #fff;
            border-radius: 5px;
            text-align: center;
            margin-top: 20px;
        }

        /* --- Footer --- */
        .footer {
            background-color: #111;
            color: #aaa;
            padding: 60px 0 20px;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-column h3 {
            color: #fff;
            margin-bottom: 20px;
            font-size: 1.3rem;
        }
        .footer-column p, .footer-column li {
            margin-bottom: 10px;
        }
        .footer-column a {
            color: #aaa;
            transition: color 0.3s ease;
        }
        .footer-column a:hover {
            color: var(--accent-color);
        }
        .social-links a {
            display: inline-block;
            width: 40px;
            height: 40px;
            background-color: #333;
            color: #fff;
            text-align: center;
            line-height: 40px;
            border-radius: 50%;
            margin-right: 10px;
            transition: background-color 0.3s ease;
        }
        .social-links a:hover {
            background-color: var(--accent-color);
        }
        .footer-bottom {
            text-align: center;
            padding-top: 20px;
            border-top: 1px solid #333;
            font-size: 0.9rem;
        }

        /* --- Modal --- */
        .modal {
            display: none;
            position: fixed;
            z-index: 2000;
            left: 0;
            top: 0;
            width: 100%;
            height: 100%;
            overflow: auto;
            background-color: rgba(0,0,0,0.5);
        }
        .modal-content {
            background-color: #fff;
            margin: 5% auto;
            padding: 30px;
            border-radius: 10px;
            width: 90%;
            max-width: 600px;
            position: relative;
            animation: modalFadeIn 0.3s ease;
        }
        @keyframes modalFadeIn {
            from { opacity: 0; transform: translateY(-50px); }
            to { opacity: 1; transform: translateY(0); }
        }
        .close {
            position: absolute;
            top: 15px;
            right: 20px;
            font-size: 2rem;
            font-weight: bold;
            cursor: pointer;
            color: var(--text-color);
        }
        .close:hover { color: var(--primary-color); }
        
        /* --- Responsive Design --- */
        @media (max-width: 992px) {
            h1 { font-size: 2.5rem; }
            .hero h1 { font-size: 2.8rem; }
            nav ul li { margin-left: 15px; }
        }

        @media (max-width: 768px) {
            .mobile-menu-btn { display: block; }
            nav { display: none; position: absolute; top: 100%; left: 0; width: 100%; background: #fff; box-shadow: var(--shadow); }
            nav.active { display: block; }
            nav ul { flex-direction: column; padding: 20px; }
            nav ul li { margin: 10px 0; }
            .header-cta { display: none; } /* Hide CTA on mobile for cleaner nav */
            
            .hero { padding: 120px 0 80px; }
            .hero h1 { font-size: 2.2rem; }
            .hero-features { flex-direction: column; gap: 15px; }
            .hero-buttons .btn { display: block; width: 80%; margin: 10px auto; }

            .footer-content { grid-template-columns: 1fr; text-align: center; }
            .social-links { justify-content: center; }
        }