:root {
            --primary: #00c3ff;
            --primary-dark: #0099cc;
            --secondary: #ff00cc;
            --dark: #0a0a1a;
            --darker: #050510;
            --light: #e0f7ff;
            --text: #ffffff;
            --accent: #00ffcc;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Poppins', sans-serif;
        }
        body {
            background-color: var(--darker);
            color: var(--text);
            overflow-x: hidden;
            line-height: 1.6;
        }
        header {
            position: fixed;
            top: 0;
            width: 100%;
            padding: 1.5rem 5%;
            display: flex;
            justify-content: space-between;
            align-items: center;
            z-index: 1000;
            background: rgba(10, 10, 26, 0.95);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid rgba(0, 195, 255, 0.2);
        }
        .logo {
            font-size: 1.8rem;
            font-weight: 700;
            background: linear-gradient(90deg, var(--primary), var(--accent));
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            display: flex;
            align-items: center;
        }
        .logo i {
            margin-right: 0.5rem;
            font-size: 2rem;
        }
        nav ul {
            display: flex;
            list-style: none;
        }
        nav li {
            margin-left: 2rem;
        }
        nav a {
            color: var(--text);
            text-decoration: none;
            font-weight: 500;
            transition: color 0.3s;
            position: relative;
        }
        nav a:hover {
            color: var(--primary);
        }
        nav a::after {
            content: '';
            position: absolute;
            bottom: -5px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--primary);
            transition: width 0.3s;
        }
        nav a:hover::after {
            width: 100%;
        }
        .auth-buttons {
            display: flex;
            gap: 1rem;
        }
        .btn {
            padding: 0.7rem 1.5rem;
            border-radius: 50px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s;
            border: none;
            font-size: 0.9rem;
        }
        .btn-login {
            background: var(--primary);
            color: var(--text);
            border: 1px solid var(--primary);
        }
        .btn-login:hover {
            background: rgba(0, 195, 255, 0.1);
        }
        .btn-signup {
            background: var(--primary);
            color: var(--dark);
        }
        .btn-signup:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 5px 15px rgba(0, 195, 255, 0.4);
        }
        
        /* Hero Section */
        .hero {
            min-height: 100vh;
            display: flex;
            align-items: center;
            padding: 0 5%;
            position: relative;
            overflow: hidden;
            padding-top: 100px;
        }
        .hero-content {
            max-width: 600px;
            z-index: 2;
            margin-top: 40px;
        }
        .hero h1 {
            font-size: 3.5rem;
            margin-bottom: 1.5rem;
            background: linear-gradient(90deg, var(--primary), var(--accent));
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            line-height: 1.2;
        }
        .hero p {
            font-size: 1.2rem;
            margin-bottom: 2rem;
            color: var(--light);
        }
        .hero-buttons {
            display: flex;
            gap: 1rem;
            margin-bottom: 2rem;
        }
        .btn-primary {
            background: var(--primary);
            color: var(--dark);
            padding: 1rem 2rem;
            font-size: 1.1rem;
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-3px);
            box-shadow: 0 10px 20px rgba(0, 195, 255, 0.4);
        }
        .btn-secondary {
            background: transparent;
            color: var(--text);
            border: 1px solid var(--primary);
            padding: 1rem 2rem;
            font-size: 1.1rem;
        }
        .btn-secondary:hover {
            background: rgba(0, 195, 255, 0.1);
        }
        .hero-stats {
            display: flex;
            gap: 2rem;
        }
        .stat {
            text-align: center;
        }
        .stat-number {
            font-size: 2rem;
            font-weight: 700;
            color: var(--primary);
        }
        .stat-label {
            font-size: 0.9rem;
            color: var(--light);
        }
        
        /* Character Section */
        .character-section {
            padding: 4rem 5%;
            background: var(--dark);
            position: relative;
        }
        .character-container {
            position: relative;
            width: 100%;
            max-width: 600px;
            height: 500px;
            margin: 0 auto;
            z-index: 1;
        }
        #character-canvas {
            width: 100%;
            height: 100%;
            border-radius: 15px;
            overflow: hidden;
            touch-action: pan-y;
        }
        .character-controls {
            position: absolute;
            bottom: 30px;
            left: 50%;
            transform: translateX(-50%);
            z-index: 1000;
            text-align: center;
            width: 100%;
            max-width: 400px;
        }
        .voice-btn {
            background: var(--primary);
            color: white;
            border: none;
            padding: 12px 24px;
            border-radius: 25px;
            cursor: pointer;
            margin: 5px;
            font-weight: 600;
            transition: all 0.3s;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .voice-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 5px 15px rgba(0, 195, 255, 0.4);
        }
        .voice-btn-secondary {
            background: var(--secondary);
        }
        #voice-status {
            color: var(--light);
            font-size: 0.9rem;
            margin-top: 10px;
            min-height: 20px;
        }
        
        /* Chatbot Container */
        .chatbot-container {
            position: fixed;
            bottom: 30px;
            right: 30px;
            z-index: 1000;
        }
        .chatbot-toggle {
            width: 60px;
            height: 60px;
            border-radius: 50%;
            background: var(--primary);
            display: flex;
            justify-content: center;
            align-items: center;
            cursor: pointer;
            box-shadow: 0 5px 15px rgba(0, 195, 255, 0.4);
            transition: all 0.3s;
        }
        .chatbot-toggle:hover {
            transform: scale(1.1);
        }
        .chatbot-toggle i {
            color: var(--dark);
            font-size: 1.5rem;
        }
        .chatbot-window {
            position: absolute;
            bottom: 80px;
            right: 0;
            width: 350px;
            height: 450px;
            background: var(--dark);
            border-radius: 15px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
            display: none;
            flex-direction: column;
            border: 1px solid rgba(0, 195, 255, 0.2);
            overflow: hidden;
        }
        .chatbot-header {
            padding: 1rem;
            background: rgba(0, 195, 255, 0.1);
            display: flex;
            align-items: center;
            gap: 0.8rem;
        }
        .chatbot-avatar {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: var(--primary);
            display: flex;
            justify-content: center;
            align-items: center;
        }
        .chatbot-avatar i {
            color: var(--dark);
        }
        .chatbot-info h4 {
            font-size: 1rem;
        }
        .chatbot-info p {
            font-size: 0.8rem;
            color: var(--light);
        }
        .voice-controls-chat {
            margin-left: auto;
        }
        .voice-btn-small {
            background: transparent;
            border: 1px solid var(--primary);
            color: var(--primary);
            border-radius: 50%;
            width: 30px;
            height: 30px;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: all 0.3s;
        }
        .voice-btn-small:hover {
            background: var(--primary);
            color: var(--dark);
        }
        .chatbot-messages {
            flex: 1;
            padding: 1rem;
            overflow-y: auto;
            display: flex;
            flex-direction: column;
            gap: 1rem;
        }
        .message {
            max-width: 80%;
            padding: 0.8rem 1rem;
            border-radius: 15px;
            font-size: 0.9rem;
        }
        .bot-message {
            align-self: flex-start;
            background: rgba(0, 195, 255, 0.1);
            border-bottom-left-radius: 5px;
        }
        .user-message {
            align-self: flex-end;
            background: rgba(0, 195, 255, 0.3);
            border-bottom-right-radius: 5px;
        }
        .chatbot-input {
            padding: 1rem;
            display: flex;
            gap: 0.5rem;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
        }
        .chatbot-input input {
            flex: 1;
            padding: 0.8rem;
            border-radius: 50px;
            border: 1px solid rgba(255, 255, 255, 0.2);
            background: rgba(255, 255, 255, 0.05);
            color: var(--text);
            outline: none;
        }
        .chatbot-input button {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: var(--primary);
            border: none;
            color: var(--dark);
            cursor: pointer;
            display: flex;
            justify-content: center;
            align-items: center;
        }
        
        /* Video Section */
        .video-section {
            padding: 8rem 5%;
            text-align: center;
            background: var(--darker);
        }
        .section-title {
            font-size: 2.5rem;
            margin-bottom: 1rem;
            color: var(--text);
        }
        .section-subtitle {
            font-size: 1.2rem;
            margin-bottom: 3rem;
            color: var(--light);
            max-width: 700px;
            margin-left: auto;
            margin-right: auto;
        }
        .video-container {
            max-width: 900px;
            margin: 0 auto;
            border-radius: 15px;
            overflow: hidden;
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
            position: relative;
        }
        #feature-video {
            width: 100%;
            display: block;
        }
        .video-overlay {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            background: rgba(5, 5, 16, 0.7);
            opacity: 1;
            transition: opacity 0.5s;
        }
        .video-overlay.hidden {
            opacity: 0;
            pointer-events: none;
        }
        .play-button {
            width: 80px;
            height: 80px;
            border-radius: 50%;
            background: var(--primary);
            display: flex;
            justify-content: center;
            align-items: center;
            cursor: pointer;
            margin-bottom: 1.5rem;
            transition: all 0.3s;
        }
        .play-button:hover {
            transform: scale(1.1);
            box-shadow: 0 0 30px rgba(0, 195, 255, 0.7);
        }
        .play-button i {
            color: var(--dark);
            font-size: 2rem;
            margin-left: 5px;
        }
        .video-overlay h3 {
            font-size: 1.8rem;
            margin-bottom: 0.5rem;
        }
        .video-overlay p {
            font-size: 1.1rem;
            max-width: 500px;
        }
        
        /* Features Section */
        .features {
            padding: 8rem 5%;
            background: var(--darker);
        }
        .features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 2rem;
            margin-top: 3rem;
        }
        .feature-card {
            background: var(--dark);
            border-radius: 15px;
            padding: 2rem;
            transition: transform 0.3s, box-shadow 0.3s;
            border: 1px solid rgba(0, 195, 255, 0.1);
        }
        .feature-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.3);
            border-color: rgba(0, 195, 255, 0.3);
        }
        .feature-icon {
            font-size: 2.5rem;
            margin-bottom: 1.5rem;
            color: var(--primary);
        }
        .feature-title {
            font-size: 1.5rem;
            margin-bottom: 1rem;
            color: var(--text);
        }
        .feature-desc {
            color: var(--light);
        }
        
        /* CTA Section */
        .cta {
            padding: 8rem 5%;
            text-align: center;
            background: linear-gradient(135deg, var(--dark), var(--darker));
            position: relative;
            overflow: hidden;
        }
        .cta::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1000 1000"><polygon fill="%2300c3ff" fill-opacity="0.03" points="0,1000 1000,0 1000,1000"/></svg>');
            background-size: cover;
            z-index: 1;
        }
        .cta h2, .cta p, .cta .cta-buttons {
            position: relative;
            z-index: 2;
        }
        .cta h2 {
            font-size: 2.5rem;
            margin-bottom: 1.5rem;
        }
        .cta p {
            font-size: 1.2rem;
            max-width: 700px;
            margin: 0 auto 2.5rem;
            color: var(--light);
        }
        .cta-buttons {
            display: flex;
            justify-content: center;
            gap: 1.5rem;
            margin-bottom: 1rem;
        }
        .btn-cta {
            background: var(--primary);
            color: var(--dark);
            padding: 1.2rem 2.5rem;
            font-size: 1.2rem;
            border-radius: 50px;
            display: inline-block;
            text-decoration: none;
            font-weight: 600;
            transition: all 0.3s;
        }
        .btn-cta:hover {
            background: var(--primary-dark);
            transform: translateY(-3px);
            box-shadow: 0 10px 25px rgba(0, 195, 255, 0.4);
        }
        .btn-cta-secondary {
            padding: 1.2rem 2.5rem;
            background: var(--dark);
            color: var(--primary);
            border: 2px solid var(--primary);
            border-radius: 50px;
            text-decoration: none;
            font-weight: 600;
            transition: all 0.3s;
            font-size: 1.2rem;
        }
        .btn-cta-secondary:hover {
            background: rgba(0, 195, 255, 0.1);
            transform: translateY(-3px);
        }
        
        /* Footer */
        footer {
            padding: 4rem 5% 2rem;
            background: var(--darker);
            border-top: 1px solid rgba(0, 195, 255, 0.1);
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 2rem;
            margin-bottom: 2rem;
        }
        .footer-column h3 {
            font-size: 1.2rem;
            margin-bottom: 1.5rem;
            color: var(--primary);
        }
        .footer-links {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 0.8rem;
        }
        .footer-links a {
            color: var(--light);
            text-decoration: none;
            transition: color 0.3s;
        }
        .footer-links a:hover {
            color: var(--primary);
        }
        .social-links {
            display: flex;
            gap: 1rem;
            margin-top: 1rem;
        }
        .social-link {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: var(--dark);
            display: flex;
            justify-content: center;
            align-items: center;
            color: var(--text);
            text-decoration: none;
            transition: all 0.3s;
        }
        .social-link:hover {
            background: var(--primary);
            color: var(--dark);
            transform: translateY(-3px);
        }
        .copyright {
            text-align: center;
            padding-top: 2rem;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            color: var(--light);
            font-size: 0.9rem;
        }
        
        /* Animations */
        @keyframes float {
            0% { transform: translateY(0px); }
            50% { transform: translateY(-10px); }
            100% { transform: translateY(0px); }
        }
        .floating {
            animation: float 5s ease-in-out infinite;
        }
        .pulse {
            animation: pulse 2s infinite;
        }
        @keyframes pulse {
            0% { box-shadow: 0 0 0 0 rgba(0, 195, 255, 0.7); }
            70% { box-shadow: 0 0 0 10px rgba(0, 195, 255, 0); }
            100% { box-shadow: 0 0 0 0 rgba(0, 195, 255, 0); }
        }
        
        /* Mobile Responsive Styles */
        @media (max-width: 1200px) {
            .character-container {
                max-width: 500px;
                height: 450px;
            }
        }
        
        @media (max-width: 1024px) {
            .hero h1 {
                font-size: 3rem;
            }
            .character-container {
                max-width: 450px;
                height: 400px;
            }
        }
        
        @media (max-width: 768px) {
            /* Header */
            header {
                padding: 1rem 3%;
            }
            .logo {
                font-size: 1.4rem;
            }
            .logo i {
                font-size: 1.6rem;
                margin-right: 0.3rem;
            }
            nav ul {
                display: none;
            }
            .btn {
                padding: 0.5rem 1rem;
                font-size: 0.8rem;
            }
            .auth-buttons {
                gap: 0.5rem;
            }
            
            /* Hero Section */
            .hero {
                flex-direction: column;
                justify-content: center;
                text-align: center;
                padding-top: 120px;
                min-height: auto;
            }
            .hero-content {
                max-width: 100%;
                margin-top: 20px;
            }
            .hero h1 {
                font-size: 2.5rem;
            }
            .hero-buttons {
                justify-content: center;
                flex-wrap: wrap;
            }
            .hero-stats {
                flex-wrap: wrap;
                justify-content: center;
                gap: 1.5rem;
            }
            
            /* Character Section */
            .character-section {
                padding: 3rem 5%;
            }
            .character-container {
                height: 350px;
                max-width: 400px;
            }
            .character-controls {
                bottom: 20px;
            }
            .voice-btn {
                padding: 10px 18px;
                font-size: 0.9rem;
            }
            
            /* Video Section */
            .video-section {
                padding: 6rem 3%;
            }
            .section-title {
                font-size: 2.2rem;
            }
            .video-overlay h3 {
                font-size: 1.5rem;
            }
            .video-overlay p {
                font-size: 1rem;
                max-width: 90%;
            }
            .play-button {
                width: 70px;
                height: 70px;
            }
            .play-button i {
                font-size: 1.8rem;
            }
            
            /* Features Section */
            .features {
                padding: 6rem 5%;
            }
            .features-grid {
                grid-template-columns: 1fr;
                gap: 1.5rem;
            }
            
            /* CTA Section */
            .cta {
                padding: 6rem 5%;
            }
            .cta h2 {
                font-size: 2rem;
                margin-bottom: 1rem;
            }
            .cta p {
                font-size: 1.1rem;
                margin-bottom: 2rem;
            }
            .cta-buttons {
                gap: 1rem;
            }
            .btn-cta, .btn-cta-secondary {
                padding: 1rem 2rem;
                font-size: 1.1rem;
            }
            
            /* Chatbot */
            .chatbot-window {
                width: 300px;
                height: 400px;
            }
        }
        
        @media (max-width: 480px) {
            /* Hero Section */
            .hero {
                padding-top: 120px;
            }
            .hero h1 {
                font-size: 2rem;
            }
            .btn-primary, .btn-secondary {
                padding: 0.8rem 1.5rem;
                font-size: 1rem;
            }
            .stat-number {
                font-size: 1.5rem;
            }
            .stat-label {
                font-size: 0.8rem;
            }
            
            /* Character Section */
            .character-section {
                padding: 2rem 3%;
            }
            .character-container {
                height: 300px;
                max-width: 350px;
            }
            .character-controls {
                bottom: 15px;
            }
            .voice-btn {
                padding: 8px 16px;
                font-size: 0.8rem;
                margin: 3px;
            }
            #voice-status {
                font-size: 0.8rem;
            }
            
            /* Video Section */
            .video-section {
                padding: 4rem 3%;
            }
            .section-title {
                font-size: 1.8rem;
            }
            .section-subtitle {
                font-size: 1rem;
            }
            .video-container {
                border-radius: 10px;
            }
            .video-overlay h3 {
                font-size: 1.2rem;
            }
            .video-overlay p {
                font-size: 0.9rem;
            }
            .play-button {
                width: 60px;
                height: 60px;
                margin-top: 1.5rem;
            }
            .play-button i {
                font-size: 1.5rem;
            }
            
            /* CTA Section */
            .cta {
                padding: 4rem 3%;
            }
            .cta h2 {
                font-size: 1.5rem;
                margin-bottom: 0.8rem;
            }
            .cta p {
                font-size: 0.95rem;
                margin-bottom: 1.5rem;
            }
            .cta-buttons {
                flex-direction: column;
                align-items: center;
                gap: 0.8rem;
            }
            .btn-cta, .btn-cta-secondary {
                display: block;
                width: 80%;
                text-align: center;
                padding: 0.8rem 1.5rem;
                font-size: 1rem;
            }
            
            /* Chatbot */
            .chatbot-container {
                bottom: 20px;
                right: 20px;
            }
            .chatbot-toggle {
                width: 50px;
                height: 50px;
            }
            .chatbot-toggle i {
                font-size: 1.2rem;
            }
            .chatbot-window {
                width: 280px;
                height: 380px;
                right: -10px;
            }
            
            /* Footer */
            .footer-content {
                grid-template-columns: 1fr;
                gap: 1.5rem;
            }
            .footer-column h3 {
                font-size: 1.1rem;
            }
            .footer-column p {
                font-size: 0.9rem;
            }
            .newsletter-form {
                gap: 0.1rem;
                font-size: 1rem;
            }
            .newsletter-form input {
                padding: 0.7rem;
                font-size: 0.9rem;
            }
            .newsletter-form .btn-primary {
                padding: 0.7rem;
                font-size: 0.9rem;
            }
        }
        
        @media (max-width: 360px) {
            .character-container {
                height: 250px;
                max-width: 300px;
            }
            .voice-btn {
                padding: 6px 12px;
                font-size: 0.75rem;
            }
            .chatbot-window {
                width: 260px;
                height: 350px;
            }
        }