/* Base styles */
        :root {
            --primary: #2c3e50;
            --secondary: #e74c3c;
            --accent: #f39c12;
            --light: #ecf0f1;
            --dark: #34495e;
            --text: #2c3e50;
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }

        body {
            color: var(--text);
            line-height: 1.6;
            background-color: #f9f9f9;
        }

        /* Typography */
        h1, h2, h3, h4 {
            font-weight: 700;
            line-height: 1.2;
            margin-bottom: 1rem;
        }

        h1 {
            font-size: 2.5rem;
        }

        h2 {
            font-size: 2rem;
            position: relative;
            display: inline-block;
        }

        h2::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: -10px;
            width: 60px;
            height: 4px;
            background-color: var(--secondary);
        }

        p {
            margin-bottom: 1.5rem;
        }

        /* Layout */
        .container {
            width: 90%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        section {
            padding: 60px 0;
        }

        .section-title {
            text-align: center;
            margin-bottom: 40px;
        }

        /* Header */
        header {
            background-color: var(--primary);
            padding: 20px 0;
            position: fixed;
            width: 100%;
            top: 0;
            z-index: 1000;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
        }

        nav {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .logo {
            font-size: 1.8rem;
            font-weight: 700;
            color: white;
            text-decoration: none;
        }

        .logo span {
            color: var(--secondary);
        }

        .nav-links {
            display: flex;
            list-style: none;
        }

        .nav-links li {
            margin-left: 30px;
        }

        .nav-links a {
            color: white;
            text-decoration: none;
            font-weight: 500;
            transition: color 0.3s;
        }

        .nav-links a:hover {
            color: var(--accent);
        }

        /* Hero Section */
        .hero {
            height: 100vh;
            background: linear-gradient(rgba(0, 0, 0, 0.7), rgba(0, 0, 0, 0.7)), url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg"
width="100" height="100" viewBox="0 0 100 100"><rect width="100" height="100" fill="%232c3e50"/><circle cx="50" cy="50" r="40" fill="%23e74c3c"
opacity="0.2"/></svg>');
            display: flex;
            align-items: center;
            color: white;
            text-align: center;
            padding-top: 60px;
        }

        .hero-content {
            max-width: 800px;
            margin: 0 auto;
        }

        .hero h1 {
            font-size: 3.5rem;
            margin-bottom: 1.5rem;
            color: white;
        }

        .hero p {
            font-size: 1.2rem;
            margin-bottom: 2rem;
        }

        .btn {
            display: inline-block;
            background-color: var(--secondary);
            color: white;
            padding: 12px 30px;
            border-radius: 30px;
            text-decoration: none;
            font-weight: 600;
            transition: all 0.3s;
        }

        .btn:hover {
            background-color: #c0392b;
            transform: translateY(-3px);
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
        }

        /* About Section */
        .about-content {
            display: flex;
            align-items: center;
            gap: 50px;
        }

        .about-text {
            flex: 1;
        }

        .about-image {
            flex: 1;
            background-color: #ddd;
            height: 400px;
            border-radius: 10px;
            overflow: hidden;
        }

        /* Megacities Section */
        .cities-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 30px;
            margin-top: 40px;
        }

        .city-card {
            background-color: white;
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
            transition: transform 0.3s;
        }

        .city-card:hover {
            transform: translateY(-10px);
        }

        .city-card img {
            width: 100%;
            height: 200px;
            object-fit: cover;
        }

        .city-info {
            padding: 20px;
        }

        /* Heritage Section */
        .heritage-slider {
            margin-top: 40px;
            position: relative;
        }

        .heritage-slide {
            display: none;
            height: 400px;
            opacity: 0;
            transition: opacity 0.5s;
        }

        .heritage-slide.active {
            display: block;
            opacity: 1;
        }

        .heritage-slide img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: 10px;
        }

        .heritage-info {
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            background: linear-gradient(transparent, rgba(0, 0, 0, 0.8));
            padding: 20px;
            color: white;
        }

        .slider-nav {
            display: flex;
            justify-content: center;
            margin-top: 20px;
        }

        .slider-dot {
            width: 12px;
            height: 12px;
            background-color: rgba(255, 255, 255, 0.5);
            border-radius: 50%;
            margin: 0 5px;
            cursor: pointer;
        }

        .slider-dot.active {
            background-color: white;
        }

        /* Preservation Section */
        .preservation-options {
            display: flex;
            flex-wrap: wrap;
            gap: 30px;
            margin-top: 40px;
        }

        .preservation-card {
            flex: 1 1 300px;
            background-color: white;
            padding: 30px;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
        }

        .preservation-card i {
            font-size: 2.5rem;
            color: var(--secondary);
            margin-bottom: 20px;
        }

        /* Testimonials */
        .testimonials {
            background-color: var(--primary);
            color: white;
        }

        .testimonial-container {
            max-width: 800px;
            margin: 0 auto;
        }

        .testimonial {
            padding: 40px;
            text-align: center;
        }

        .testimonial-text {
            font-size: 1.2rem;
            font-style: italic;
            margin-bottom: 20px;
        }

        .testimonial-author {
            font-weight: 600;
        }

        /* Footer */
        footer {
            background-color: var(--dark);
            color: white;
            padding: 50px 0 20px;
        }

        .footer-content {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            margin-bottom: 40px;
        }

        .footer-column {
            flex: 1 1 250px;
            margin-bottom: 30px;
        }

        .footer-column h3 {
            color: white;
            margin-bottom: 20px;
        }

        .footer-column ul {
            list-style: none;
        }

        .footer-column ul li {
            margin-bottom: 10px;
        }

        .footer-column ul li a {
            color: #bdc3c7;
            text-decoration: none;
            transition: color 0.3s;
        }

        .footer-column ul li a:hover {
            color: white;
        }

 .social-links {
            display: flex;
            gap: 15px;
        }

        .social-links a {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            background: rgba(255, 255, 255, 0.1);
            border-radius: 50%;
            color: white;
            text-decoration: none;
            transition: background 0.3s;
        }

        .social-links a:hover {
            background: var(--primary);
        }


        .social-icons {
            display: flex;
            gap: 15px;
            margin-top: 20px;
        }

        .social-icon {
            display: inline-block;
            width: 40px;
            height: 40px;
            background-color: rgba(255, 255, 255, 0.1);
            border-radius: 50%;
            text-align: center;
            line-height: 40px;
            transition: all 0.3s;
        }

        .social-icon:hover {
            background-color: var(--secondary);
            transform: translateY(-5px);
        }

        .footer-bottom {
            text-align: center;
            padding-top: 30px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
        }

        /* Responsive */
        @media (max-width: 768px) {
            .nav-links {
                display: none;
            }

            .about-content {
                flex-direction: column;
            }

            .hero h1 {
                font-size: 2.5rem;
            }

            .cities-grid {
                grid-template-columns: 1fr;
            }

            .preservation-options {
                flex-direction: column;
            }
        }