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

        :root {
            --primary-color: #667eea;
            --secondary-color: #764ba2;
            --accent-color: #FFD700;
            --text-dark: #2c3e50;
            --text-light: #7f8c8d;
            --white: #ffffff;
            --light-bg: #f8f9fa;
            --shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
            --transition: all 0.3s ease;
        }

        body {
            font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            line-height: 1.6;
            color: var(--text-dark);
            overflow-x: hidden;
        }

        /* Header & Navigation */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(20px);
            z-index: 1000;
            transition: var(--transition);
            border-bottom: 1px solid rgba(0, 0, 0, 0.05);
        }

        .header.scrolled {
            background: rgba(255, 255, 255, 0.98);
            box-shadow: var(--shadow);
        }

        .nav-container {
            max-width: 1400px;
            margin: 0 auto;
            padding: 0 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            height: 80px;
        }

        .logo {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--primary-color);
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .logo-icon {
            font-size: 2rem;
        }

        .nav-menu {
            display: flex;
            list-style: none;
            gap: 40px;
            align-items: center;
        }

        .nav-item {
            position: relative;
        }

        .nav-link {
            text-decoration: none;
            color: var(--text-dark);
            font-weight: 500;
            font-size: 0.95rem;
            transition: var(--transition);
            padding: 10px 0;
            position: relative;
        }

        .nav-link::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: linear-gradient(45deg, var(--primary-color), var(--secondary-color));
            transition: width 0.3s ease;
        }

        .nav-link:hover::after,
        .nav-link.active::after {
            width: 100%;
        }

        .nav-link:hover {
            color: var(--primary-color);
        }

        .cta-buttons {
            display: flex;
            gap: 15px;
            align-items: center;
        }

        .btn {
            padding: 12px 24px;
            border-radius: 30px;
            text-decoration: none;
            font-weight: 600;
            font-size: 0.9rem;
            transition: var(--transition);
            border: none;
            cursor: pointer;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

        .btn-outline {
            color: var(--primary-color);
            border: 2px solid var(--primary-color);
            background: transparent;
        }

        .btn-outline:hover {
            background: var(--primary-color);
            color: white;
            transform: translateY(-2px);
        }

        .btn-primary {
            background: linear-gradient(45deg, var(--primary-color), var(--secondary-color));
            color: white;
            box-shadow: 0 5px 15px rgba(102, 126, 234, 0.3);
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 25px rgba(102, 126, 234, 0.4);
        }

        /* Mobile Menu */
        .mobile-toggle {
            display: none;
            flex-direction: column;
            cursor: pointer;
            gap: 4px;
        }

        .mobile-toggle span {
            width: 25px;
            height: 3px;
            background: var(--text-dark);
            transition: var(--transition);
        }

        .mobile-menu {
            display: none;
            position: absolute;
            top: 100%;
            left: 0;
            right: 0;
            background: white;
            box-shadow: var(--shadow);
            padding: 20px;
        }

        .mobile-menu.active {
            display: block;
        }

        .mobile-nav {
            list-style: none;
        }

        .mobile-nav li {
            margin: 15px 0;
        }

        .mobile-nav a {
            color: var(--text-dark);
            text-decoration: none;
            font-weight: 500;
            font-size: 1.1rem;
        }

        /* Main Content Area */
        .main-content {
            margin-top: 80px;
            min-height: calc(100vh - 80px);
        }

        /* Page Container */
        .page {
            display: none;
            animation: fadeIn 0.5s ease-in-out;
        }

        .page.active {
            display: block;
        }

        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(20px); }
            to { opacity: 1; transform: translateY(0); }
        }

        .container {
            max-width: 1400px;
            margin: 0 auto;
            padding: 0 20px;
        }

        .section {
            padding: 80px 0;
        }

        /* Home Page Styles */
        .hero {
            background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
            color: white;
            text-align: center;
            padding: 120px 0;
            position: relative;
            overflow: hidden;
        }

        .hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="rgba(255,255,255,0.1)" stroke-width="0.5"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
            opacity: 0.3;
        }

        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 800px;
            margin: 0 auto;
        }

        .hero h1 {
            font-size: 3.5rem;
            font-weight: 800;
            margin-bottom: 20px;
            line-height: 1.2;
        }

        .hero p {
            font-size: 1.3rem;
            opacity: 0.9;
            margin-bottom: 40px;
        }

        .hero-buttons {
            display: flex;
            gap: 20px;
            justify-content: center;
            flex-wrap: wrap;
        }

        .stats-section {
            background: var(--light-bg);
            padding: 60px 0;
        }

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 40px;
            text-align: center;
        }

        .stat-item {
            background: white;
            padding: 40px 20px;
            border-radius: 20px;
            box-shadow: var(--shadow);
            transition: var(--transition);
        }

        .stat-item:hover {
            transform: translateY(-10px);
        }

        .stat-number {
            font-size: 2.5rem;
            font-weight: 800;
            color: var(--primary-color);
            margin-bottom: 10px;
        }

        .stat-label {
            color: var(--text-light);
            font-weight: 500;
        }

        /* About Page Styles */
        .about-hero {
            padding: 100px 0;
            text-align: center;
            background: var(--light-bg);
        }

        .about-hero h1 {
            font-size: 3rem;
            margin-bottom: 20px;
            color: var(--text-dark);
        }

        .about-content {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 60px;
            align-items: center;
            margin-top: 60px;
        }

        .about-text {
            font-size: 1.1rem;
            line-height: 1.8;
        }

        .about-image {
            background: linear-gradient(45deg, var(--primary-color), var(--secondary-color));
            height: 400px;
            border-radius: 20px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-size: 4rem;
        }

        /* Products Page Styles */
        .products-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
            gap: 40px;
            margin-top: 60px;
        }

        .product-card {
            background: white;
            border-radius: 20px;
            padding: 40px;
            box-shadow: var(--shadow);
            transition: var(--transition);
            text-align: center;
        }

        .product-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
        }

        .product-icon {
            font-size: 4rem;
            margin-bottom: 20px;
            display: block;
        }

        .product-title {
            font-size: 1.8rem;
            font-weight: 700;
            margin-bottom: 15px;
            color: var(--text-dark);
        }

        .product-description {
            color: var(--text-light);
            margin-bottom: 30px;
            line-height: 1.7;
        }

        .feature-list {
            list-style: none;
            text-align: left;
            margin: 20px 0;
        }

        .feature-list li {
            padding: 8px 0;
            padding-left: 25px;
            position: relative;
            color: var(--text-light);
        }

        .feature-list li::before {
            content: '✓';
            position: absolute;
            left: 0;
            color: var(--primary-color);
            font-weight: bold;
        }

        /* Contact Page Styles */
        .contact-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 60px;
            margin-top: 60px;
        }

        .contact-info {
            background: var(--light-bg);
            padding: 40px;
            border-radius: 20px;
        }

        .contact-form {
            background: white;
            padding: 40px;
            border-radius: 20px;
            box-shadow: var(--shadow);
        }

        .form-group {
            margin-bottom: 25px;
        }

        .form-group label {
            display: block;
            margin-bottom: 8px;
            font-weight: 600;
            color: var(--text-dark);
        }

        .form-group input,
        .form-group textarea {
            width: 100%;
            padding: 15px;
            border: 2px solid #e1e8ed;
            border-radius: 10px;
            font-size: 1rem;
            transition: var(--transition);
            background: white;
        }

        .form-group input:focus,
        .form-group textarea:focus {
            outline: none;
            border-color: var(--primary-color);
            box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
        }

        .contact-item {
            display: flex;
            align-items: center;
            gap: 15px;
            margin-bottom: 25px;
            padding: 20px;
            background: white;
            border-radius: 15px;
        }

        .contact-icon {
            font-size: 1.5rem;
            color: var(--primary-color);
            width: 40px;
            text-align: center;
        }

        /* Footer */
        .footer {
            background: var(--text-dark);
            color: white;
            padding: 60px 0 30px;
            text-align: center;
        }

        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 40px;
            margin-bottom: 40px;
        }

        .footer-section h3 {
            margin-bottom: 20px;
            color: var(--accent-color);
        }

        .footer-section a {
            color: rgba(255, 255, 255, 0.8);
            text-decoration: none;
            transition: var(--transition);
            display: block;
            margin-bottom: 10px;
        }

        .footer-section a:hover {
            color: var(--accent-color);
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 30px;
            color: rgba(255, 255, 255, 0.6);
        }

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

            .mobile-toggle {
                display: flex;
            }

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

            .hero-buttons {
                flex-direction: column;
                align-items: center;
            }

            .about-content,
            .contact-grid {
                grid-template-columns: 1fr;
                gap: 40px;
            }

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

            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .cta-buttons {
                display: none;
            }
        }

        /* Loading Animation */
        .loading {
            display: inline-block;
            width: 20px;
            height: 20px;
            border: 3px solid rgba(255, 255, 255, 0.3);
            border-radius: 50%;
            border-top-color: white;
            animation: spin 1s ease-in-out infinite;
        }

        @keyframes spin {
            to { transform: rotate(360deg); }
        }

        /* Utility Classes */
        .text-center { text-align: center; }
        .mb-20 { margin-bottom: 20px; }
        .mb-30 { margin-bottom: 30px; }
        .mb-40 { margin-bottom: 40px; }

        .section-title {
            font-size: 2.5rem;
            font-weight: 700;
            text-align: center;
            margin-bottom: 60px;
            color: var(--text-dark);
        }

        .section-subtitle {
            font-size: 1.2rem;
            color: var(--text-light);
            text-align: center;
            margin-bottom: 40px;
            max-width: 600px;
            margin-left: auto;
            margin-right: auto;
        }