
        :root {
            /* Light mode colors */
            --bg-primary: #ffffff;
            --bg-secondary: #f8fafc;
            --bg-accent: #f1f5f9;
            --text-primary: #1e293b;
            --text-secondary: #64748b;
            --text-accent: #3b82f6;
            --border-color: #e2e8f0;
            --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
            --gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
        }

        [data-theme="dark"] {
            /* Dark mode colors */
            --bg-primary: #1a1a1a;
            --bg-secondary: #2d2d2d;
            --bg-accent: #374151;
            --text-primary: #ffffff;
            --text-secondary: #f0f0f0;
            --text-accent: #60a5fa;
            --border-color: #4b5563;
            --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.3);
            --gradient: linear-gradient(135deg, #4f46e5 0%, #7c3aed 100%);
        }

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

        body {
            font-family: 'Inter', sans-serif;
            background-color: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.6;
            transition: background-color 0.3s ease, color 0.3s ease;
        }

        /* Header & Navigation */
        .header {
            position: fixed;
            top: 0;
            width: 100%;
            background: var(--bg-primary);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--border-color);
            z-index: 1000;
            transition: all 0.3s ease;
        }

        .nav {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 1rem 2rem;
            max-width: 1200px;
            margin: 0 auto;
        }

        .logo {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--text-accent);
        }

        .nav-links {
            display: flex;
            list-style: none;
            gap: 2rem;
        }

        .nav-links a {
            text-decoration: none;
            color: var(--text-secondary);
            font-weight: 500;
            transition: color 0.3s ease;
            position: relative;
        }

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

        .nav-links a.active::after {
            content: '';
            position: absolute;
            bottom: -8px;
            left: 0;
            width: 100%;
            height: 2px;
            background: var(--text-accent);
            border-radius: 1px;
        }

        .nav-controls {
            display: flex;
            align-items: center;
            gap: 1rem;
        }

        .theme-toggle {
            background: var(--bg-accent);
            border: 1px solid var(--border-color);
            border-radius: 50px;
            padding: 0.5rem;
            cursor: pointer;
            transition: all 0.3s ease;
            min-width: 44px;
            min-height: 44px;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .theme-toggle:hover {
            background: var(--text-accent);
            color: white;
        }

        .hamburger {
            display: none;
            flex-direction: column;
            cursor: pointer;
            padding: 0.5rem;
            min-width: 44px;
            min-height: 44px;
            justify-content: center;
        }

        .hamburger span {
            width: 25px;
            height: 3px;
            background: var(--text-primary);
            margin: 3px 0;
            transition: 0.3s;
        }

        /* Hero Section */
        .hero {
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            background: 
                linear-gradient(135deg, rgba(102, 126, 234, 0.8) 0%, rgba(118, 75, 162, 0.8) 100%),
                url('https://images.unsplash.com/photo-1519389950473-47ba0277781c?ixlib=rb-4.0.3&ixid=M3wxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8fA%3D%3D&auto=format&fit=crop&w=2070&q=80') center/cover no-repeat;
            position: relative;
            overflow: hidden;
        }

        .hero-content {
            text-align: center;
            color: white;
            max-width: 800px;
            padding: 2rem;
            z-index: 2;
        }

        .hero h1 {
            font-size: clamp(2.5rem, 5vw, 4rem);
            font-weight: 700;
            margin-bottom: 1.5rem;
            animation: fadeInUp 1s ease-out;
        }

        .hero p {
            font-size: clamp(1.1rem, 2vw, 1.3rem);
            margin-bottom: 2rem;
            opacity: 0.9;
            animation: fadeInUp 1s ease-out 0.2s both;
        }

        .cta-button {
            display: inline-block;
            background: rgba(255, 255, 255, 0.2);
            color: white;
            padding: 1rem 2rem;
            border-radius: 50px;
            text-decoration: none;
            font-weight: 600;
            backdrop-filter: blur(10px);
            border: 1px solid rgba(255, 255, 255, 0.3);
            transition: all 0.3s ease;
            animation: fadeInUp 1s ease-out 0.4s both;
            min-height: 44px;
            display: inline-flex;
            align-items: center;
        }

        .cta-button:hover {
            background: rgba(255, 255, 255, 0.3);
            transform: translateY(-2px);
        }

        /* Features Section */
        .features {
            padding: 5rem 2rem;
            background: var(--bg-secondary);
        }

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

        .section-title {
            text-align: center;
            font-size: clamp(2rem, 4vw, 3rem);
            font-weight: 700;
            margin-bottom: 3rem;
            color: var(--text-primary);
        }

        .features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 2rem;
        }

        .feature-card {
            background: var(--bg-primary);
            padding: 2rem;
            border-radius: 20px;
            box-shadow: var(--shadow);
            transition: all 0.3s ease;
            border: 1px solid var(--border-color);
        }

        .feature-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
        }

        .feature-icon {
            width: 60px;
            height: 60px;
            background: var(--gradient);
            border-radius: 15px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 1.5rem;
            font-size: 1.5rem;
            color: white;
        }

        .feature-card h3 {
            font-size: 1.5rem;
            font-weight: 600;
            margin-bottom: 1rem;
            color: var(--text-primary);
        }

        .feature-card p {
            color: var(--text-secondary);
            line-height: 1.7;
        }

        /* About Section */
        .about {
            padding: 5rem 2rem;
            background: var(--bg-primary);
        }

        .about-content {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 4rem;
            align-items: center;
        }

        .about-text h2 {
            font-size: clamp(2rem, 4vw, 2.5rem);
            font-weight: 700;
            margin-bottom: 2rem;
            color: var(--text-primary);
        }

        .about-text p {
            color: var(--text-secondary);
            margin-bottom: 1.5rem;
            font-size: 1.1rem;
            line-height: 1.8;
        }

        .about-image {
            background: url('https://images.unsplash.com/photo-1551434678-e076c223a692?ixlib=rb-4.0.3&ixid=M3wxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8fA%3D%3D&auto=format&fit=crop&w=2070&q=80') center/cover no-repeat;
            border-radius: 20px;
            height: 400px;
            position: relative;
            overflow: hidden;
        }

        .about-image::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: var(--gradient);
            opacity: 0.3;
            border-radius: 20px;
        }

        /* Footer */
        .footer {
            background: var(--bg-secondary);
            padding: 3rem 2rem 2rem;
            border-top: 1px solid var(--border-color);
        }

        .footer-content {
            max-width: 1200px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
        }

        .footer-section h3 {
            font-weight: 600;
            margin-bottom: 1rem;
            color: var(--text-primary);
        }

        .footer-section p,
        .footer-section a {
            color: var(--text-secondary);
            text-decoration: none;
            line-height: 1.8;
        }

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

        .footer-bottom {
            text-align: center;
            margin-top: 2rem;
            padding-top: 2rem;
            border-top: 1px solid var(--border-color);
            color: var(--text-secondary);
        }

        /* Animations */
        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(30px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        /* Mobile Responsive */
        @media (max-width: 768px) {
            .nav-links {
                display: none;
                position: absolute;
                top: 100%;
                left: 0;
                width: 100%;
                background: var(--bg-primary);
                flex-direction: column;
                padding: 2rem;
                border-top: 1px solid var(--border-color);
            }

            .nav-links.active {
                display: flex;
            }

            .hamburger {
                display: flex;
            }

            .hamburger.active span:nth-child(1) {
                transform: rotate(-45deg) translate(-5px, 6px);
            }

            .hamburger.active span:nth-child(2) {
                opacity: 0;
            }

            .hamburger.active span:nth-child(3) {
                transform: rotate(45deg) translate(-5px, -6px);
            }

            .about-content {
                grid-template-columns: 1fr;
                gap: 2rem;
            }

            .about-image {
                height: 250px;
                order: -1;
            }

            .nav {
                padding: 1rem;
            }

            .hero-content {
                padding: 1rem;
            }

            .features,
            .about {
                padding: 3rem 1rem;
            }
        }

        @media (max-width: 480px) {
            .features-grid {
                grid-template-columns: 1fr;
            }

            .feature-card {
                padding: 1.5rem;
            }
        }
    