/* CSS Variables */
        :root {
            --primary-dark: #1a365d;
            --primary-blue: #2563eb;
            --accent-green: #10b981;
            --light-gray: #f8fafc;
            --dark-gray: #64748b;
            --white: #ffffff;
            --shadow-light: 0 5px 15px rgba(0,0,0,0.08);
            --shadow-hover: 0 15px 35px rgba(0,0,0,0.15);
        }

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

        body {
            font-family: 'Poppins', sans-serif;
            line-height: 1.6;
            color: #334155;
            overflow-x: hidden;
        }

        /* Navigation */
        .navbar {
            background: rgba(26, 54, 93, 0.95);
            backdrop-filter: blur(10px);
            box-shadow: 0 2px 20px rgba(0,0,0,0.1);
            transition: all 0.3s ease;
            padding: 1rem 0;
        }

        .navbar.scrolled {
            background: var(--primary-dark);
            padding: 0.5rem 0;
        }

        .navbar-brand {
            font-weight: 700;
            font-size: 1.5rem;
            color: var(--white) !important;
            text-decoration: none;
        }

        .navbar-nav .nav-link {
            color: var(--white) !important;
            font-weight: 500;
            margin: 0 0.5rem;
            transition: all 0.3s ease;
            position: relative;
        }

        .navbar-nav .nav-link:hover {
            color: var(--accent-green) !important;
            transform: translateY(-2px);
        }

        .navbar-nav .nav-link.active {
            color: var(--accent-green) !important;
        }

        /* Hero Section */
        .hero-section {
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary-blue) 100%);
            color: var(--white);
            padding: 140px 0 100px;
            position: relative;
            overflow: hidden;
        }

        .hero-section::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"><circle cx="20" cy="20" r="2" fill="rgba(255,255,255,0.1)"/><circle cx="80" cy="40" r="1" fill="rgba(255,255,255,0.1)"/><circle cx="40" cy="60" r="1.5" fill="rgba(255,255,255,0.1)"/><circle cx="70" cy="80" r="1" fill="rgba(255,255,255,0.1)"/></svg>');
            animation: float 20s ease-in-out infinite;
        }

        @keyframes float {
            0%, 100% { transform: translateY(0) rotate(0deg); }
            50% { transform: translateY(-20px) rotate(180deg); }
        }

        .hero-content {
            position: relative;
            z-index: 2;
            text-align: center;
        }

        .hero-title {
            font-size: 3.5rem;
            font-weight: 700;
            margin-bottom: 1.5rem;
            background: linear-gradient(45deg, var(--white), var(--accent-green));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            opacity: 0;
            transform: translateY(30px);
            animation: fadeInUp 1s ease 0.2s forwards;
        }

        .hero-subtitle {
            font-size: 1.25rem;
            margin-bottom: 2rem;
            opacity: 0;
            transform: translateY(30px);
            animation: fadeInUp 1s ease 0.4s forwards;
        }

        @keyframes fadeInUp {
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        /* Products Section */
        .products-section {
            padding: 100px 0;
            background: var(--light-gray);
        }

        .section-title {
            text-align: center;
            margin-bottom: 4rem;
        }

        .section-title h2 {
            font-size: 2.5rem;
            font-weight: 700;
            color: var(--primary-dark);
            margin-bottom: 1rem;
        }

        .section-title p {
            font-size: 1.1rem;
            color: var(--dark-gray);
            max-width: 600px;
            margin: 0 auto;
        }

        .products-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
            gap: 2rem;
            margin-top: 3rem;
        }

        .product-card {
            background: var(--white);
            border-radius: 20px;
            overflow: hidden;
            box-shadow: var(--shadow-light);
            transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
            opacity: 0;
            transform: translateY(50px);
            border: 1px solid rgba(0,0,0,0.05);
        }

        .product-card.animate {
            opacity: 1;
            transform: translateY(0);
        }

        .product-card:hover {
            transform: translateY(-15px);
            box-shadow: var(--shadow-hover);
        }

        .product-image {
            width: 100%;
            height: 250px;
            background: linear-gradient(135deg, var(--primary-blue), var(--accent-green));
            position: relative;
            overflow: hidden;
        }

        .product-image::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>');
        }

        .product-icon {
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            font-size: 4rem;
            color: var(--white);
            opacity: 0.8;
        }

        .product-content {
            padding: 2rem;
        }

        .product-title {
            font-size: 1.5rem;
            font-weight: 600;
            color: var(--primary-dark);
            margin-bottom: 1rem;
        }

        .product-description {
            color: var(--dark-gray);
            line-height: 1.7;
            margin-bottom: 1.5rem;
        }

        .product-features {
            list-style: none;
            padding: 0;
            margin-bottom: 2rem;
        }

        .product-features li {
            padding: 0.5rem 0;
            color: var(--dark-gray);
            position: relative;
            padding-left: 1.5rem;
        }

        .product-features li::before {
            content: '✓';
            position: absolute;
            left: 0;
            color: var(--accent-green);
            font-weight: bold;
        }

        .product-action {
            display: flex;
            gap: 1rem;
            align-items: center;
        }

        .btn-primary-custom {
            background: linear-gradient(45deg, var(--accent-green), #059669);
            border: none;
            padding: 12px 24px;
            font-size: 1rem;
            font-weight: 600;
            border-radius: 25px;
            color: var(--white);
            text-decoration: none;
            display: inline-block;
            transition: all 0.3s ease;
            box-shadow: 0 4px 15px rgba(16, 185, 129, 0.3);
        }

        .btn-primary-custom:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 25px rgba(16, 185, 129, 0.4);
            color: var(--white);
        }

        .btn-secondary-custom {
            background: transparent;
            border: 2px solid var(--primary-blue);
            padding: 10px 22px;
            font-size: 1rem;
            font-weight: 600;
            border-radius: 25px;
            color: var(--primary-blue);
            text-decoration: none;
            display: inline-block;
            transition: all 0.3s ease;
        }

        .btn-secondary-custom:hover {
            background: var(--primary-blue);
            color: var(--white);
        }

        /* Dark Mode Toggle */
        .theme-toggle {
            position: fixed;
            top: 100px;
            right: 2rem;
            z-index: 1000;
            background: var(--white);
            border: none;
            width: 50px;
            height: 50px;
            border-radius: 50%;
            box-shadow: var(--shadow-light);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            cursor: pointer;
            transition: all 0.3s ease;
        }

        .theme-toggle:hover {
            transform: scale(1.1);
            box-shadow: var(--shadow-hover);
        }

        /* Dark Mode Styles */
        body.dark-mode {
            background: #0f172a;
            color: #e2e8f0;
        }

        body.dark-mode .products-section {
            background: #1e293b;
        }

        body.dark-mode .product-card {
            background: #334155;
            border-color: #475569;
        }

        body.dark-mode .product-title {
            color: var(--white);
        }

        body.dark-mode .product-description {
            color: #cbd5e1;
        }

        body.dark-mode .product-features li {
            color: #cbd5e1;
        }

        body.dark-mode .section-title h2 {
            color: var(--white);
        }

        body.dark-mode .section-title p {
            color: #cbd5e1;
        }

        body.dark-mode .theme-toggle {
            background: #334155;
            color: var(--white);
        }

        /* Responsive Design */
        @media (max-width: 768px) {
            .hero-title {
                font-size: 2.5rem;
            }
            
            .hero-subtitle {
                font-size: 1.1rem;
            }
            
            .products-grid {
                grid-template-columns: 1fr;
                gap: 1.5rem;
            }
            
            .theme-toggle {
                right: 1rem;
                top: 80px;
            }

            .product-action {
                flex-direction: column;
                align-items: stretch;
            }
        }

        /* Smooth Scroll */
        html {
            scroll-behavior: smooth;
        }