@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&display=swap');
        
        * {
            font-family: 'Inter', sans-serif;
            transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease;
        }
        
        :root {
            --bg-primary: #0f172a;
            --bg-secondary: #1e293b;
            --bg-tertiary: #334155;
            --bg-card: rgba(30, 41, 59, 0.8);
            --text-primary: #f8fafc;
            --text-secondary: #cbd5e1;
            --text-muted: #94a3b8;
            --border: rgba(148, 163, 184, 0.2);
            --accent-primary: #3b82f6;
            --accent-secondary: #8b5cf6;
            --accent-success: #10b981;
            --accent-warning: #f59e0b;
            --accent-error: #ef4444;
            --gradient-primary: linear-gradient(135deg, #3b82f6, #1e40af);
            --gradient-secondary: linear-gradient(135deg, #1e293b, #334155);
            --gradient-accent: linear-gradient(135deg, #6366f1, #8b5cf6);
            --shadow-light: rgba(0, 0, 0, 0.1);
            --shadow-medium: rgba(0, 0, 0, 0.2);
            --shadow-heavy: rgba(0, 0, 0, 0.3);
        }
        
        [data-theme="light"] {
            --bg-primary: #ffffff;
            --bg-secondary: #f8fafc;
            --bg-tertiary: #e2e8f0;
            --bg-card: rgba(255, 255, 255, 0.9);
            --text-primary: #1e293b;
            --text-secondary: #475569;
            --text-muted: #64748b;
            --border: rgba(148, 163, 184, 0.3);
            --shadow-light: rgba(0, 0, 0, 0.05);
            --shadow-medium: rgba(0, 0, 0, 0.1);
            --shadow-heavy: rgba(0, 0, 0, 0.15);
        }
        
        body {
            background: var(--bg-primary);
            color: var(--text-primary);
            overflow-x: hidden;
        }
        
        .hero-bg {
            background: 
                radial-gradient(circle at 25% 25%, rgba(59, 130, 246, 0.1) 0%, transparent 50%),
                radial-gradient(circle at 75% 75%, rgba(139, 92, 246, 0.1) 0%, transparent 50%),
                linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
            min-height: 100vh;
            position: relative;
        }
        
        .hero-pattern {
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background-image: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grid" width="20" height="20" patternUnits="userSpaceOnUse"><path d="M 20 0 L 0 0 0 20" fill="none" stroke="rgba(59,130,246,0.1)" stroke-width="0.5"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
            opacity: 0.3;
        }
        
        .navbar {
            backdrop-filter: blur(20px);
            background: var(--bg-card);
            border-bottom: 1px solid var(--border);
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            transition: all 0.3s ease;
        }
        
        .navbar.scrolled {
            background: var(--bg-card);
            box-shadow: 0 4px 20px var(--shadow-medium);
        }
        
        .nav-link {
            color: var(--text-secondary);
            text-decoration: none;
            font-weight: 500;
            transition: all 0.3s ease;
            position: relative;
        }
        
        .nav-link:hover {
            color: var(--accent-primary);
        }
        
        .nav-link::after {
            content: '';
            position: absolute;
            bottom: -4px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--gradient-primary);
            transition: width 0.3s ease;
        }
        
        .nav-link:hover::after {
            width: 100%;
        }
        
        .btn-primary {
            background: var(--gradient-primary);
            color: var(--text-primary);
            padding: 0.75rem 2rem;
            border-radius: 8px;
            font-weight: 600;
            text-decoration: none;
            transition: all 0.3s ease;
            border: none;
            cursor: pointer;
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
        }
        
        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 25px rgba(59, 130, 246, 0.4);
        }
        
        .btn-secondary {
            background: transparent;
            color: var(--accent-primary);
            border: 2px solid var(--accent-primary);
            padding: 0.75rem 2rem;
            border-radius: 8px;
            font-weight: 600;
            text-decoration: none;
            transition: all 0.3s ease;
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
        }
        
        .btn-secondary:hover {
            background: var(--accent-primary);
            color: var(--text-primary);
            transform: translateY(-2px);
        }
        
        .feature-card {
            background: var(--bg-card);
            backdrop-filter: blur(20px);
            border: 1px solid var(--border);
            border-radius: 16px;
            padding: 2rem;
            transition: all 0.3s ease;
            position: relative;
            overflow: hidden;
        }
        
        .feature-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: var(--gradient-primary);
            transform: scaleX(0);
            transition: transform 0.3s ease;
        }
        
        .feature-card:hover::before {
            transform: scaleX(1);
        }
        
        .feature-card:hover {
            transform: translateY(-8px);
            box-shadow: 0 20px 40px var(--shadow-heavy);
            border-color: var(--accent-primary);
        }
        
        .feature-icon {
            width: 60px;
            height: 60px;
            background: var(--gradient-primary);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            color: white;
            margin-bottom: 1.5rem;
        }
        
        .stats-card {
            background: var(--bg-card);
            backdrop-filter: blur(20px);
            border: 1px solid var(--border);
            border-radius: 16px;
            padding: 2rem;
            text-align: center;
            transition: all 0.3s ease;
        }
        
        .stats-card:hover {
            transform: translateY(-4px);
            box-shadow: 0 15px 30px var(--shadow-medium);
        }
        
        .stats-number {
            font-size: 3rem;
            font-weight: 800;
            background: var(--gradient-primary);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            display: block;
            margin-bottom: 0.5rem;
        }
        
        .stats-label {
            color: var(--text-secondary);
            font-weight: 500;
        }
        
        .pricing-card {
            background: var(--bg-card);
            backdrop-filter: blur(20px);
            border: 1px solid var(--border);
            border-radius: 16px;
            padding: 2rem;
            transition: all 0.3s ease;
            position: relative;
            overflow: hidden;
        }
        
        .pricing-card.featured {
            border-color: var(--accent-primary);
            transform: scale(1.05);
        }
        
        .pricing-card.featured::before {
            content: 'Most Popular';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            background: var(--gradient-primary);
            color: white;
            text-align: center;
            padding: 0.5rem;
            font-size: 0.875rem;
            font-weight: 600;
        }
        
        .pricing-card:hover {
            transform: translateY(-8px);
            box-shadow: 0 20px 40px var(--shadow-heavy);
        }
        
        .pricing-card.featured:hover {
            transform: scale(1.05) translateY(-8px);
        }
        
        .level-badge {
            display: inline-block;
            padding: 0.5rem 1rem;
            border-radius: 20px;
            font-size: 0.875rem;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.5px;
            margin-bottom: 1rem;
        }
        
        .level-Bronze { background: linear-gradient(135deg, #cd7f32, #b8860b); color: white; }
        .level-Silver { background: linear-gradient(135deg, #c0c0c0, #a8a8a8); color: white; }
        .level-Gold { background: linear-gradient(135deg, #ffd700, #ffb347); color: #1a1a1a; }
        .level-Platinum { background: linear-gradient(135deg, #e5e4e2, #b8b8b8); color: #1a1a1a; }
        .level-Diamond { background: linear-gradient(135deg, #b9f2ff, #87ceeb); color: #1a1a1a; }
        .level-Elite { background: linear-gradient(135deg, #1a1a2e, #16213e); color: white; }
        
        .testimonial-card {
            background: var(--bg-card);
            backdrop-filter: blur(20px);
            border: 1px solid var(--border);
            border-radius: 16px;
            padding: 2rem;
            transition: all 0.3s ease;
        }
        
        .testimonial-card:hover {
            transform: translateY(-4px);
            box-shadow: 0 15px 30px var(--shadow-medium);
        }
        
        .avatar {
            width: 60px;
            height: 60px;
            border-radius: 50%;
            background: var(--gradient-primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            color: white;
            font-weight: 600;
        }
        
        .section-title {
            font-size: 3rem;
            font-weight: 800;
            text-align: center;
            margin-bottom: 1rem;
            background: var(--gradient-primary);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        
        .section-subtitle {
            color: var(--text-secondary);
            text-align: center;
            font-size: 1.25rem;
            margin-bottom: 4rem;
            max-width: 600px;
            margin-left: auto;
            margin-right: auto;
        }
        
        .footer {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border);
            padding: 4rem 0 2rem;
        }
        
        .mobile-menu {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: var(--bg-card);
            backdrop-filter: blur(20px);
            z-index: 1001;
            padding: 2rem;
        }
        
        .mobile-menu.active {
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
        }
        
        .mobile-menu .nav-link {
            font-size: 1.5rem;
            margin: 1rem 0;
        }
        
        .theme-toggle {
            background: var(--bg-tertiary);
            border: 1px solid var(--border);
            border-radius: 50px;
            padding: 0.5rem;
            cursor: pointer;
            transition: all 0.3s ease;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 0.5rem;
            position: relative;
            width: 60px;
            height: 30px;
        }
        
        .theme-toggle::before {
            content: '';
            position: absolute;
            width: 22px;
            height: 22px;
            background: var(--accent-primary);
            border-radius: 50%;
            transition: transform 0.3s ease;
            transform: translateX(-5px);
        }
        
        [data-theme="light"] .theme-toggle::before {
            transform: translateX(27px);
        }
        
        .scroll-indicator {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 4px;
            background: rgba(59, 130, 246, 0.2);
            z-index: 1002;
        }
        
        .scroll-progress {
            height: 100%;
            background: var(--gradient-primary);
            width: 0%;
            transition: width 0.1s ease;
        }
        
        .floating-cta {
            position: fixed;
            bottom: 2rem;
            right: 2rem;
            z-index: 1000;
            opacity: 0;
            transform: translateY(100px);
            transition: all 0.3s ease;
        }
        
        .floating-cta.visible {
            opacity: 1;
            transform: translateY(0);
        }
        
        .timeline {
            position: relative;
            padding: 2rem 0;
        }
        
        .timeline::before {
            content: '';
            position: absolute;
            left: 50%;
            top: 0;
            bottom: 0;
            width: 2px;
            background: var(--gradient-primary);
            transform: translateX(-50%);
        }
        
        .timeline-item {
            position: relative;
            margin-bottom: 4rem;
            display: flex;
            align-items: center;
        }
        
        .timeline-item:nth-child(odd) {
            flex-direction: row-reverse;
        }
        
        .timeline-content {
            flex: 1;
            padding: 2rem;
            background: var(--bg-card);
            border-radius: 16px;
            border: 1px solid var(--border);
            margin: 0 2rem;
            position: relative;
        }
        
        .timeline-icon {
            width: 60px;
            height: 60px;
            background: var(--gradient-primary);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-size: 1.5rem;
            position: relative;
            z-index: 2;
        }
        
        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: 12px;
            margin-bottom: 1rem;
            overflow: hidden;
            transition: all 0.3s ease;
        }
        
        .faq-question {
            padding: 1.5rem;
            cursor: pointer;
            display: flex;
            justify-content: between;
            align-items: center;
            font-weight: 600;
            color: var(--text-primary);
        }
        
        .faq-answer {
            padding: 0 1.5rem 1.5rem;
            color: var(--text-secondary);
            display: none;
        }
        
        .faq-item.active .faq-answer {
            display: block;
        }
        
        .faq-item.active {
            border-color: var(--accent-primary);
        }
        
        .security-badge {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.5rem 1rem;
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: 8px;
            font-size: 0.875rem;
            font-weight: 500;
        }
        
        .news-card {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: 16px;
            overflow: hidden;
            transition: all 0.3s ease;
        }
        
        .news-card:hover {
            transform: translateY(-4px);
            box-shadow: 0 15px 30px var(--shadow-medium);
        }
        
        .news-image {
            width: 100%;
            height: 200px;
            background: var(--gradient-primary);
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-size: 3rem;
        }
        
        .calculator-card {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: 16px;
            padding: 2rem;
        }
        
        .calculator-input {
            width: 100%;
            padding: 1rem;
            border: 1px solid var(--border);
            border-radius: 8px;
            background: var(--bg-tertiary);
            color: var(--text-primary);
            font-size: 1rem;
            margin-bottom: 1rem;
        }
        
        .calculator-result {
            background: var(--gradient-primary);
            color: white;
            padding: 1.5rem;
            border-radius: 12px;
            text-align: center;
            font-weight: 600;
            margin-top: 1rem;
        }
        
        @media (max-width: 768px) {
            .section-title {
                font-size: 2rem;
            }
            
            .hero-title {
                font-size: 2.5rem !important;
            }
            
            .pricing-card.featured {
                transform: none;
            }
            
            .pricing-card.featured:hover {
                transform: translateY(-8px);
            }
            
            .timeline::before {
                left: 2rem;
            }
            
            .timeline-item {
                flex-direction: row !important;
            }
            
            .timeline-item:nth-child(odd) {
                flex-direction: row !important;
            }
            
            .timeline-content {
                margin-left: 4rem;
                margin-right: 0;
            }
        }
        
        .loading-overlay {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: var(--bg-primary);
            display: flex;
            align-items: center;
            justify-content: center;
            z-index: 9999;
            transition: opacity 0.5s ease;
        }
        
        .loading-overlay.hidden {
            opacity: 0;
            pointer-events: none;
        }
        
        .loading-spinner {
            width: 60px;
            height: 60px;
            border: 4px solid var(--border);
            border-top: 4px solid var(--accent-primary);
            border-radius: 50%;
            animation: spin 1s linear infinite;
        }
        
        @keyframes spin {
            0% { transform: rotate(0deg); }
            100% { transform: rotate(360deg); }
        }
        
        .notification {
            position: fixed;
            top: 100px;
            right: 2rem;
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: 12px;
            padding: 1rem 1.5rem;
            box-shadow: 0 10px 30px var(--shadow-medium);
            transform: translateX(400px);
            transition: transform 0.3s ease;
            z-index: 1001;
        }
        
        .notification.show {
            transform: translateX(0);
        }
        
        .chat-widget {
            position: fixed;
            bottom: 100px;
            right: 2rem;
            width: 60px;
            height: 60px;
            background: var(--gradient-primary);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-size: 1.5rem;
            cursor: pointer;
            box-shadow: 0 4px 20px rgba(59, 130, 246, 0.4);
            transition: all 0.3s ease;
            z-index: 1000;
        }
        
        .chat-widget:hover {
            transform: scale(1.1);
        }
        
        .back-to-top {
            position: fixed;
            bottom: 2rem;
            left: 2rem;
            width: 50px;
            height: 50px;
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-primary);
            cursor: pointer;
            opacity: 0;
            transform: translateY(100px);
            transition: all 0.3s ease;
            z-index: 1000;
        }
        
        .back-to-top.visible {
            opacity: 1;
            transform: translateY(0);
        }
        
        .back-to-top:hover {
            background: var(--accent-primary);
            color: white;
        }