:root {
            --bg-dark: #000000;
            --bg-mid: #0A0A0A;
            --bg-darker: #000000;
            --accent-blue: #3A6FF8;
            --accent-violet: #8C4BFF;
            --accent-rose: #FF5CAF;
            --text-primary: #FFFFFF;
            --text-muted: #B8BCC8;
            --text-dim: #6B7280;
            --glow-blue: 0 0 20px rgba(58, 111, 248, 0.4);
            --glow-violet: 0 0 20px rgba(140, 75, 255, 0.4);
            --glow-rose: 0 0 20px rgba(255, 92, 175, 0.4);
            --grain-opacity: 0.03;
            --border-radius: 24px;
            --transition: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
            --font-heading: 'Poppins', sans-serif;
            --font-body: 'Inter', sans-serif;
            --shadow-soft: 0 8px 32px rgba(0, 0, 0, 0.3);
            --shadow-medium: 0 16px 64px rgba(0, 0, 0, 0.4);
            --shadow-strong: 0 24px 96px rgba(0, 0, 0, 0.5);
        }

        /* Reset & Base */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
            height: 100%;
        }

        body {
            font-family: var(--font-body);
            background: var(--bg-dark);
            background-attachment: fixed;
            color: var(--text-primary);
            line-height: 1.7;
            font-size: 18px;
            font-weight: 300;
            overflow-x: hidden;
            position: relative;
            min-height: 100%;
            letter-spacing: 0.01em;
            box-sizing: border-box;
            text-transform: uppercase;
        }

        /* Enhanced matte noise overlay */
        body::before {
            content: '';
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 512 512' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='1.2' numOctaves='6' stitchTiles='stitch'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3CfeComponentTransfer%3E%3CfeFuncA type='discrete' tableValues='0.02 0.04 0.06 0.08 0.1'/%3E%3C/feComponentTransfer%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)' opacity='0.15'/%3E%3C/svg%3E");
            pointer-events: none;
            z-index: 1000;
            mix-blend-mode: multiply;
        }

        /* Matte texture overlay */
        body::after {
            content: '';
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: 
                radial-gradient(circle at 20% 80%, rgba(58, 111, 248, 0.03) 0%, transparent 50%),
                radial-gradient(circle at 80% 20%, rgba(140, 75, 255, 0.03) 0%, transparent 50%),
                radial-gradient(circle at 40% 40%, rgba(255, 92, 175, 0.02) 0%, transparent 50%),
                linear-gradient(135deg, rgba(0, 0, 0, 0.8) 0%, rgba(0, 0, 0, 0.9) 100%);
            pointer-events: none;
            z-index: 1;
        }

        /* Additional matte film grain */
        html::before {
            content: '';
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='grain'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.8' numOctaves='3' result='noise'/%3E%3CfeColorMatrix in='noise' type='saturate' values='0'/%3E%3CfeComponentTransfer%3E%3CfeFuncA type='discrete' tableValues='0.01 0.02 0.03 0.04'/%3E%3C/feComponentTransfer%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23grain)' opacity='0.25'/%3E%3C/svg%3E");
            pointer-events: none;
            z-index: 999;
            mix-blend-mode: screen;
        }

        /* Dramatic background layers */
        body::after {
            content: '';
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: 
                radial-gradient(circle at 20% 80%, rgba(58, 111, 248, 0.15) 0%, transparent 50%),
                radial-gradient(circle at 80% 20%, rgba(140, 75, 255, 0.15) 0%, transparent 50%),
                radial-gradient(circle at 40% 40%, rgba(255, 92, 175, 0.1) 0%, transparent 50%);
            pointer-events: none;
            z-index: 1;
        }

        /* Page Management */
        .page {
            display: none;
            min-height: 100vh;
        }

        .page.active {
            display: block;
        }

        /* Massive floating frequency particles */
        .frequency-particles {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            pointer-events: none;
            z-index: 3;
            opacity: 0.6;
        }

        .particle {
            position: absolute;
            border-radius: 50%;
            background: linear-gradient(135deg, rgba(58, 111, 248, 0.3) 0%, rgba(140, 75, 255, 0.2) 100%);
            border: 2px solid rgba(255, 255, 255, 0.1);
            box-shadow: var(--glow-blue);
            animation: particleFloat 20s ease-in-out infinite;
        }

        .particle:nth-child(1) {
            width: 120px;
            height: 120px;
            left: 8%;
            top: 15%;
            animation-delay: 0s;
        }

        .particle:nth-child(2) {
            width: 180px;
            height: 180px;
            left: 75%;
            top: 20%;
            animation-delay: -5s;
            background: linear-gradient(135deg, rgba(140, 75, 255, 0.3) 0%, rgba(255, 92, 175, 0.2) 100%);
            box-shadow: var(--glow-violet);
        }

        .particle:nth-child(3) {
            width: 90px;
            height: 90px;
            left: 60%;
            top: 70%;
            animation-delay: -10s;
            background: linear-gradient(135deg, rgba(255, 92, 175, 0.3) 0%, rgba(58, 111, 248, 0.2) 100%);
            box-shadow: var(--glow-rose);
        }

        .particle:nth-child(4) {
            width: 60px;
            height: 60px;
            left: 20%;
            top: 80%;
            animation-delay: -15s;
        }

        .particle:nth-child(5) {
            width: 150px;
            height: 150px;
            left: 45%;
            top: 45%;
            animation-delay: -7s;
            background: linear-gradient(135deg, rgba(140, 75, 255, 0.25) 0%, rgba(58, 111, 248, 0.25) 100%);
            box-shadow: var(--glow-violet);
        }

        @keyframes particleFloat {
            0%, 100% {
                transform: translateY(0px) rotate(0deg) scale(1);
                opacity: 0.6;
            }
            25% {
                transform: translateY(-30px) rotate(90deg) scale(1.1);
                opacity: 0.8;
            }
            50% {
                transform: translateY(-60px) rotate(180deg) scale(0.9);
                opacity: 1;
            }
            75% {
                transform: translateY(-30px) rotate(270deg) scale(1.05);
                opacity: 0.7;
            }
        }

        /* Typography */
        .ultra-headline {
            font-family: var(--font-heading);
            font-weight: 900;
            font-size: clamp(3rem, 6vw, 6rem);
            line-height: 0.95;
            color: #FFFFFF;
            text-shadow: 0 4px 20px rgba(0, 0, 0, 0.8);
            letter-spacing: -0.03em;
        }

        .mega-headline {
            font-family: var(--font-heading);
            font-weight: 900;
            font-size: clamp(4rem, 8vw, 7rem);
            line-height: 0.9;
            color: #FFFFFF;
            text-shadow: 0 4px 20px rgba(0, 0, 0, 0.8);
            letter-spacing: -0.04em;
        }

        .white-headline {
            font-family: var(--font-heading);
            font-weight: 900;
            font-size: clamp(2.5rem, 5vw, 5rem);
            line-height: 0.95;
            color: #FFFFFF;
            text-shadow: 0 4px 20px rgba(0, 0, 0, 0.8);
            letter-spacing: -0.03em;
        }

        .section-headline {
            font-family: var(--font-heading);
            font-weight: 900;
            font-size: clamp(2.5rem, 5vw, 5rem);
            line-height: 0.95;
            color: #FFFFFF;
            text-shadow: 0 4px 20px rgba(0, 0, 0, 0.8);
            letter-spacing: -0.03em;
        }

        .mega-subtitle {
            font-size: 1.0rem;
            color: #FFFFFF;
            font-weight: 300;
            margin-top: 2rem;
            letter-spacing: 0.01em;
            line-height: 1.6;
            opacity: 0.9;
        }

        .light-subtitle {
            font-size: 1.5rem;
            color: #FFFFFF;
            font-weight: 300;
            margin-top: 2rem;
            letter-spacing: 0.01em;
            line-height: 1.6;
            opacity: 0.9;
        }

        /* Buttons */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 1.25rem 2.5rem;
            border: none;
            border-radius: 50px;
            font-family: var(--font-body);
            font-weight: 600;
            font-size: 1.125rem;
            text-decoration: none;
            cursor: pointer;
            transition: var(--transition);
            position: relative;
            overflow: hidden;
            min-height: 64px;
            letter-spacing: 0.01em;
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--accent-blue) 0%, var(--accent-violet) 100%);
            color: var(--text-primary);
            box-shadow: var(--glow-blue), var(--shadow-soft);
            border: 1px solid rgba(255, 255, 255, 0.2);
        }

        .btn-primary:hover {
            transform: translateY(-4px) scale(1.02);
            box-shadow: var(--glow-violet), var(--shadow-strong);
            background: linear-gradient(135deg, #4A7BF7 0%, #9C5BFF 100%);
        }

        .btn-secondary {
            background: rgba(255, 255, 255, 0.08);
            color: var(--text-primary);
            border: 1px solid rgba(255, 255, 255, 0.15);
            backdrop-filter: blur(10px);
        }

        .btn-secondary:hover {
            background: rgba(255, 255, 255, 0.12);
            border-color: rgba(255, 255, 255, 0.25);
            box-shadow: var(--shadow-soft);
            transform: translateY(-2px);
        }

        .btn-white {
            background: rgba(255, 255, 255, 0.95);
            color: var(--bg-dark);
            border: 1px solid rgba(255, 255, 255, 0.3);
            backdrop-filter: blur(20px);
        }

        .btn-white:hover {
            background: rgba(255, 255, 255, 1);
            box-shadow: 0 10px 40px rgba(255, 255, 255, 0.3);
            transform: translateY(-2px);
        }

        /* Container */
        .container {
            max-width: 1400px;
            margin: 0 auto;
            padding: 0 2rem;
        }

        .wide-container {
            max-width: 1600px;
            margin: 0 auto;
            padding: 0 2rem;
        }

        /* Navigation */
        .navbar {
            position: fixed;
            top: 2rem;
            left: 50%;
            transform: translateX(-50%);
            z-index: 100;
            background: transparent;
            backdrop-filter: none;
            border: none;
            border-radius: var(--border-radius);
            transition: var(--transition);
            padding: 0.75rem 2rem;
            max-width: 900px;
            width: 90%;
            box-shadow: none;
        }

        .navbar.scrolled {
            background: transparent;
            box-shadow: none;
            transform: translateX(-50%);
        }

        .nav-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
        }

        .nav-logo {
            font-family: var(--font-heading);
            font-weight: 800;
            font-size: 1.5rem;
            background: linear-gradient(135deg, var(--accent-blue) 0%, var(--accent-violet) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            text-decoration: none;
            cursor: pointer;
        }

        .nav-menu {
            display: flex;
            align-items: center;
            gap: 2rem;
            list-style: none;
        }

        .nav-link {
            color: var(--text-muted);
            text-decoration: none;
            font-weight: 500;
            transition: var(--transition);
            position: relative;
            font-size: 0.95rem;
            cursor: pointer;
        }

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

        .nav-link::after {
            content: '';
            position: absolute;
            bottom: -4px;
            left: 0;
            width: 0;
            height: 2px;
            background: linear-gradient(135deg, var(--accent-blue) 0%, var(--accent-violet) 100%);
            transition: var(--transition);
        }

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

        .nav-cta {
            padding: 0.75rem 1.5rem;
            font-size: 0.9rem;
            min-height: auto;
        }

        /* Mobile Menu */
        .mobile-menu-btn {
            display: none;
            flex-direction: column;
            justify-content: center;
            width: 32px;
            height: 32px;
            background: none;
            border: none;
            cursor: pointer;
            gap: 4px;
        }

        .menu-line {
            width: 100%;
            height: 2px;
            background: var(--text-primary);
            border-radius: 2px;
            transition: var(--transition);
        }

        /* Hero Section */
        .hero {
            min-height: 100vh;
            display: flex;
            align-items: center;
            padding: 10rem 0 6rem;
            position: relative;
            overflow: hidden;
        }



        .hero-content {
            display: flex;
            flex-direction: column;
            align-items: center;
            text-align: center;
            z-index: 2;
            max-width: 1000px;
            margin: 0 auto;
        }

        .hero-text {
            max-width: 700px;
        }

        .hero-buttons {
            display: flex;
            gap: 1.5rem;
            margin-top: 3rem;
            flex-wrap: wrap;
        }

        .hero-visual {
            display: flex;
            justify-content: center;
            align-items: center;
            position: relative;
            min-height: 600px;
        }

        /* Features Grid */
        .features-overview {
            padding: 8rem 0;
        }

        .features-mega-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
            gap: 3rem;
            margin-top: 6rem;
        }

        .feature-mega-card {
            padding: 3rem;
            background: rgba(26, 26, 31, 0.7);
            backdrop-filter: blur(20px);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: var(--border-radius);
            box-shadow: var(--glow-blue), var(--shadow-soft);
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }

        .feature-mega-card:hover {
            transform: translateY(-12px) scale(1.02);
            background: rgba(26, 26, 31, 0.9);
            border-color: rgba(255, 255, 255, 0.2);
            box-shadow: var(--glow-violet), var(--shadow-strong);
        }

        .feature-mega-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: linear-gradient(135deg, var(--accent-blue) 0%, var(--accent-violet) 100%);
            opacity: 0;
            transition: var(--transition);
        }

        .feature-mega-card:hover::before {
            opacity: 1;
        }

        .feature-mega-icon {
            font-size: 4rem;
            margin-bottom: 2rem;
            filter: drop-shadow(var(--glow-blue));
            transition: var(--transition);
        }

        .feature-mega-card:hover .feature-mega-icon {
            transform: scale(1.1);
            filter: drop-shadow(var(--glow-violet));
        }

        .feature-mega-title {
            font-size: 2rem;
            font-weight: 800;
            color: #FFFFFF;
            margin-bottom: 1.5rem;
            font-family: var(--font-heading);
        }

        .feature-mega-description {
            font-size: 1.0rem;
            color: #FFFFFF;
            line-height: 1.6;
            opacity: 0.9;
            margin-bottom: 2rem;
        }

        .feature-mega-details {
            list-style: none;
            padding: 0;
        }

        .feature-mega-details li {
            padding: 0.75rem 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
            color: var(--text-muted);
            font-size: 1.0rem;
            display: flex;
            align-items: center;
            gap: 1rem;
        }

        .feature-mega-details li:last-child {
            border-bottom: none;
        }

        .feature-mega-details li::before {
            content: '✓';
            color: var(--accent-blue);
            font-weight: bold;
            font-size: 1.25rem;
        }

        /* Stats Section */
        .stats-section {
            padding: 8rem 0;
            text-align: center;
        }

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 4rem;
            margin-top: 6rem;
        }

        .stat-card {
            padding: 3rem 2rem;
            background: rgba(26, 26, 31, 0.7);
            backdrop-filter: blur(20px);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: var(--border-radius);
            box-shadow: var(--glow-blue), var(--shadow-soft);
            transition: var(--transition);
        }

        .stat-card:hover {
            transform: translateY(-8px);
            box-shadow: var(--glow-violet), var(--shadow-strong);
        }

        .stat-number {
            font-size: 4rem;
            font-weight: 900;
            background: linear-gradient(135deg, var(--accent-blue) 0%, var(--accent-violet) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            display: block;
            margin-bottom: 1rem;
        }

        .stat-label {
            font-size: 1.0rem;
            color: #FFFFFF;
            font-weight: 300;
            opacity: 0.9;
        }

        /* Testimonials */
        .testimonials {
            padding: 8rem 0;
        }

        .testimonials-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
            gap: 3rem;
            margin-top: 6rem;
        }

        .testimonial-card {
            padding: 3rem;
            transition: var(--transition);
            position: relative;
            color: var(--text-primary);
            background: rgba(26, 26, 31, 0.7);
            backdrop-filter: blur(20px);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: var(--border-radius);
            box-shadow: var(--glow-blue), var(--shadow-soft);
        }

        .testimonial-card:hover {
            transform: translateY(-12px) scale(1.02);
            background: rgba(26, 26, 31, 0.9);
            border-color: rgba(255, 255, 255, 0.2);
            box-shadow: var(--glow-violet), var(--shadow-strong);
        }

        .testimonial-avatar {
            width: 60px;
            height: 60px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--accent-blue) 0%, var(--accent-violet) 100%);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-primary);
            font-weight: 700;
            margin-bottom: 1.5rem;
            font-size: 1.25rem;
            box-shadow: var(--glow-blue);
        }

        .testimonial-text {
            color: #FFFFFF;
            font-size: 1.25rem;
            line-height: 1.6;
            margin-bottom: 1.5rem;
            font-weight: 300;
        }

        .testimonial-author {
            color: #FFFFFF;
            font-size: 1rem;
            font-weight: 500;
            opacity: 0.8;
        }

        .testimonial-rating {
            color: #FFD700;
            font-size: 1.25rem;
            margin-top: 1rem;
            text-shadow: 0 0 10px rgba(255, 215, 0, 0.3);
        }

        /* CTA Section */
        .cta-section {
            padding: 10rem 0;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

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

        .cta-content h2 {
            margin-bottom: 2rem;
        }

        .cta-content p {
            font-size: 1.5rem;
            color: #FFFFFF;
            margin-bottom: 3rem;
            font-weight: 300;
            opacity: 0.9;
        }

        /* Science Page Styles */
        .science-hero {
            padding: 12rem 0 8rem;
            text-align: center;
        }

        .research-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
            gap: 4rem;
            margin-top: 8rem;
        }

        .research-card {
            padding: 4rem;
            background: rgba(26, 26, 31, 0.8);
            backdrop-filter: blur(20px);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: var(--border-radius);
            box-shadow: var(--glow-blue), var(--shadow-soft);
            transition: var(--transition);
        }

        .research-card:hover {
            transform: translateY(-12px);
            box-shadow: var(--glow-violet), var(--shadow-strong);
        }

        .research-title {
            font-size: 2rem;
            font-weight: 800;
            color: #FFFFFF;
            margin-bottom: 2rem;
            font-family: var(--font-heading);
        }

        .research-description {
            font-size: 1.25rem;
            color: #FFFFFF;
            line-height: 1.6;
            opacity: 0.9;
            margin-bottom: 2rem;
        }

        .research-stats {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 2rem;
            margin-top: 3rem;
        }

        .research-stat {
            text-align: center;
            padding: 2rem;
            background: rgba(255, 255, 255, 0.05);
            border-radius: 12px;
        }

        .research-stat-number {
            font-size: 2.5rem;
            font-weight: 900;
            background: linear-gradient(135deg, var(--accent-blue) 0%, var(--accent-violet) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            display: block;
        }

        .research-stat-label {
            font-size: 1rem;
            color: #FFFFFF;
            opacity: 0.8;
            margin-top: 0.5rem;
        }

        /* Dev Team Styles */
        .dev-hero {
            padding: 12rem 0 8rem;
            text-align: center;
        }

        .team-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
            gap: 4rem;
            margin-top: 8rem;
        }

        .team-card {
            padding: 4rem 3rem;
            background: rgba(26, 26, 31, 0.8);
            backdrop-filter: blur(20px);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: var(--border-radius);
            box-shadow: var(--glow-blue), var(--shadow-soft);
            transition: var(--transition);
            text-align: center;
        }

        .team-card:hover {
            transform: translateY(-12px) scale(1.02);
            box-shadow: var(--glow-violet), var(--shadow-strong);
        }

        .team-avatar {
            width: 120px;
            height: 120px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--accent-blue) 0%, var(--accent-violet) 100%);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-primary);
            font-weight: 800;
            margin: 0 auto 2rem;
            font-size: 2.5rem;
            box-shadow: var(--glow-blue);
        }

        .team-name {
            font-size: 2rem;
            font-weight: 800;
            color: #FFFFFF;
            margin-bottom: 1rem;
            font-family: var(--font-heading);
        }

        .team-role {
            font-size: 1.25rem;
            color: var(--accent-blue);
            margin-bottom: 2rem;
            font-weight: 600;
        }

        .team-bio {
            font-size: 1.125rem;
            color: #FFFFFF;
            line-height: 1.6;
            opacity: 0.9;
            margin-bottom: 2rem;
        }

        .team-skills {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            justify-content: center;
        }

        .skill-tag {
            padding: 0.5rem 1rem;
            background: rgba(255, 255, 255, 0.1);
            border-radius: 20px;
            font-size: 0.9rem;
            color: #FFFFFF;
            border: 1px solid rgba(255, 255, 255, 0.2);
        }

        /* Footer */
        .footer {
            background: var(--bg-darker);
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding: 6rem 0 3rem;
            position: relative;
        }

        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 4rem;
            margin-bottom: 3rem;
        }

        .footer-section h3 {
            font-size: 1.5rem;
            font-weight: 700;
            margin-bottom: 1.5rem;
            color: #FFFFFF;
        }

        .footer-links {
            list-style: none;
        }

        .footer-links li {
            margin-bottom: 0.75rem;
        }

        .footer-links a {
            color: #FFFFFF;
            text-decoration: none;
            transition: var(--transition);
            font-size: 1.125rem;
            opacity: 0.8;
            cursor: pointer;
        }

        .footer-links a:hover {
            color: #FFFFFF;
            opacity: 1;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 3rem;
            text-align: center;
            color: #FFFFFF;
            font-size: 1.125rem;
            opacity: 0.8;
        }

        .footer-bottom::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 200px;
            height: 2px;
            background: linear-gradient(90deg, transparent, var(--accent-blue), transparent);
            animation: underlinePulse 4s ease-in-out infinite;
        }

        @keyframes underlinePulse {
            0%, 100% { width: 200px; opacity: 0.3; }
            50% { width: 400px; opacity: 0.7; }
        }

        @keyframes spin {
            0% { transform: rotate(0deg); }
            100% { transform: rotate(360deg); }
        }

        /* Animations */
        .fade-in {
            opacity: 0;
            transform: translateY(40px);
            transition: all 1s ease;
        }

        .fade-in.visible {
            opacity: 1;
            transform: translateY(0);
        }

        .slide-in-left {
            opacity: 0;
            transform: translateX(-60px);
            transition: all 1s ease;
        }

        .slide-in-left.visible {
            opacity: 1;
            transform: translateX(0);
        }

        .slide-in-right {
            opacity: 0;
            transform: translateX(60px);
            transition: all 1s ease;
        }

        .slide-in-right.visible {
            opacity: 1;
            transform: translateX(0);
        }

        /* Responsive Design */
        @media (max-width: 768px) {
            .navbar {
                width: 95%;
                padding: 0.5rem 1rem;
            }

            .nav-menu {
                position: fixed;
                top: 0;
                left: 0;
                right: 0;
                bottom: 0;
                background: rgba(13, 13, 16, 0.98);
                backdrop-filter: blur(30px);
                flex-direction: column;
                justify-content: center;
                padding: 2rem;
                transform: translateY(-100%);
                opacity: 0;
                visibility: hidden;
                transition: var(--transition);
                gap: 3rem;
            }

            .nav-menu.active {
                transform: translateY(0);
                opacity: 1;
                visibility: visible;
            }

            .mobile-menu-btn {
                display: flex;
            }

            .hero-content {
                grid-template-columns: 1fr;
                text-align: center;
                gap: 3rem;
            }

            .hero-buttons {
                justify-content: center;
            }

            .container, .wide-container {
                padding: 0 1rem;
            }

            .features-mega-grid,
            .stats-grid,
            .testimonials-grid,
            .research-grid,
            .team-grid {
                grid-template-columns: 1fr;
            }

            .footer-content {
                grid-template-columns: 1fr;
                text-align: center;
            }

            .ultra-headline,
            .mega-headline {
                font-size: clamp(2rem, 6vw, 3rem);
            }

            .white-headline,
            .section-headline {
                font-size: clamp(1.75rem, 5vw, 2.5rem);
            }

            .hero,
            .features-overview,
            .stats-section,
            .testimonials,
            .cta-section,
            .science-hero,
            .dev-hero {
                padding: 6rem 0;
            }
        }

        @media (max-width: 480px) {
            .btn {
                padding: 1rem 2rem;
                font-size: 1rem;
                min-height: 56px;
            }

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

        /* Modal Styles */
        .modal-overlay {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(0, 0, 0, 0.8);
            backdrop-filter: blur(10px);
            display: flex;
            align-items: center;
            justify-content: center;
            z-index: 10000;
            opacity: 0;
            visibility: hidden;
            transition: all 0.3s ease;
            padding: 2rem;
        }

        .modal-overlay.active {
            opacity: 1;
            visibility: visible;
        }

        .modal-container {
            background: var(--bg-mid);
            backdrop-filter: blur(10px);
            border-radius: var(--border-radius);
            border: 1px solid rgba(255, 255, 255, 0.1);
            box-shadow: var(--shadow-strong);
            max-width: 480px;
            width: 100%;
            max-height: 90vh;
            overflow-y: auto;
            transform: scale(0.9) translateY(20px);
            transition: all 0.3s ease;
            position: relative;
        }

        .modal-overlay.active .modal-container {
            transform: scale(1) translateY(0);
        }

        .modal-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 2rem 2rem 1rem;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }

        .modal-title {
            font-family: var(--font-heading);
            font-size: 2rem;
            font-weight: 800;
            color: var(--text-primary);
            margin: 0;
        }

        .modal-close {
            background: none;
            border: none;
            color: var(--text-dim);
            cursor: pointer;
            padding: 0.5rem;
            border-radius: 50%;
            transition: var(--transition);
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .modal-close:hover {
            background: rgba(255, 255, 255, 0.1);
            color: var(--text-primary);
        }

        .modal-content {
            padding: 2rem;
        }

        .modal-subtitle {
            color: var(--text-dim);
            font-size: 1.125rem;
            margin-bottom: 2rem;
            line-height: 1.5;
        }

        /* Google Sign In Button */
        .btn-google {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 0.75rem;
            padding: 1rem 1.5rem;
            background: white;
            border: 2px solid #dadce0;
            border-radius: 12px;
            font-family: var(--font-body);
            font-size: 1rem;
            font-weight: 500;
            color: #3c4043;
            cursor: pointer;
            transition: var(--transition);
            margin-bottom: 1.5rem;
        }

        .btn-google:hover {
            background: #f8f9fa;
            border-color: #c1c7cd;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
            transform: translateY(-1px);
        }

        .google-icon {
            flex-shrink: 0;
        }

        /* Divider */
        .divider {
            display: flex;
            align-items: center;
            margin: 2rem 0;
            color: var(--text-dim);
            font-size: 0.9rem;
        }

        .divider::before,
        .divider::after {
            content: '';
            flex: 1;
            height: 1px;
            background: rgba(255, 255, 255, 0.2);
        }

        .divider span {
            padding: 0 1rem;
            background: var(--bg-mid);
        }

        /* Form Styles */
        .signup-form,
        .feedback-form {
            display: flex;
            flex-direction: column;
            gap: 1.5rem;
        }

        .form-group {
            display: flex;
            flex-direction: column;
            gap: 0.5rem;
        }

        .form-group label {
            font-weight: 600;
            color: var(--text-primary);
            font-size: 0.95rem;
        }

        .form-group input {
            padding: 1rem 1.25rem;
            border: 1px solid rgba(255, 255, 255, 0.15);
            border-radius: var(--border-radius);
            font-size: 1rem;
            font-family: var(--font-body);
            background: rgba(255, 255, 255, 0.05);
            transition: var(--transition);
            color: var(--text-primary);
        }

        .form-group input:focus {
            outline: none;
            border-color: var(--accent-blue);
            box-shadow: 0 0 0 2px rgba(74, 123, 247, 0.2);
            background: rgba(255, 255, 255, 0.08);
        }

        .form-group input::placeholder,
        .form-group textarea::placeholder {
            color: var(--text-dim);
        }

        .form-group textarea {
            padding: 1rem 1.25rem;
            border: 1px solid rgba(255, 255, 255, 0.15);
            border-radius: var(--border-radius);
            font-size: 1rem;
            font-family: var(--font-body);
            background: rgba(255, 255, 255, 0.05);
            transition: var(--transition);
            color: var(--text-primary);
            resize: vertical;
            min-height: 120px;
        }

        .form-group textarea:focus {
            outline: none;
            border-color: var(--accent-blue);
            box-shadow: 0 0 0 2px rgba(58, 111, 248, 0.2);
            background: rgba(255, 255, 255, 0.08);
        }

        /* Star Rating */
        .star-rating {
            display: flex;
            gap: 0.5rem;
            margin: 0.5rem 0;
        }

        .star {
            font-size: 2rem;
            color: #ddd;
            cursor: pointer;
            transition: var(--transition);
            user-select: none;
        }

        .star:hover,
        .star.active {
            color: #FFD700;
            transform: scale(1.1);
        }

        .star.active {
            text-shadow: 0 0 10px rgba(255, 215, 0, 0.5);
        }

        .btn-submit {
            width: 100%;
            padding: 1.25rem;
            background: linear-gradient(135deg, var(--accent-blue) 0%, var(--accent-violet) 100%);
            color: white;
            border: none;
            border-radius: 12px;
            font-family: var(--font-body);
            font-size: 1.125rem;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            margin-top: 0.5rem;
        }

        .btn-submit:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 25px rgba(58, 111, 248, 0.4);
        }

        .btn-submit:disabled {
            opacity: 0.6;
            cursor: not-allowed;
            transform: none;
        }

        /* Modal Footer */
        .modal-footer {
            margin-top: 2rem;
            padding-top: 1.5rem;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            text-align: center;
        }

        .terms-text {
            font-size: 0.875rem;
            color: var(--text-dim);
            line-height: 1.5;
            margin-bottom: 1rem;
        }

        .terms-text a {
            color: var(--accent-blue);
            text-decoration: none;
        }

        .terms-text a:hover {
            text-decoration: underline;
        }

        .signin-link {
            font-size: 0.95rem;
            color: var(--text-dim);
        }

        .link-button {
            background: none;
            border: none;
            color: var(--accent-blue);
            cursor: pointer;
            font-weight: 600;
            text-decoration: underline;
            font-size: inherit;
            font-family: inherit;
        }

        .link-button:hover {
            color: var(--accent-violet);
        }

        /* Success Modal */
        .success-modal .modal-container {
            max-width: 400px;
            text-align: center;
        }

        .success-content {
            padding: 3rem 2rem;
        }

        .success-icon {
            margin-bottom: 1.5rem;
            display: flex;
            justify-content: center;
        }

        .success-icon svg {
            animation: checkmarkDraw 0.8s ease-in-out;
        }

        @keyframes checkmarkDraw {
            0% {
                stroke-dasharray: 100;
                stroke-dashoffset: 100;
            }
            100% {
                stroke-dasharray: 100;
                stroke-dashoffset: 0;
            }
        }

        .success-title {
            font-family: var(--font-heading);
            font-size: 1.75rem;
            font-weight: 800;
            color: var(--text-primary);
            margin-bottom: 1rem;
        }

        .success-message {
            color: var(--text-dim);
            font-size: 1.125rem;
            line-height: 1.6;
        }

        /* Loading State */
        .loading {
            position: relative;
            overflow: hidden;
        }

        .loading::after {
            content: '';
            position: absolute;
            top: 0;
            left: -100%;
            width: 100%;
            height: 100%;
            background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
            animation: loading 1.5s infinite;
        }

        @keyframes loading {
            0% { left: -100%; }
            100% { left: 100%; }
        }

        /* Focus styles for accessibility */
        .btn:focus,
        .nav-link:focus,
        .modal-close:focus,
        .btn-google:focus,
        .btn-submit:focus,
        .link-button:focus {
            outline: 2px solid var(--accent-blue);
            outline-offset: 2px;
        }

        /* Demo Chat Animations */
        @keyframes messageSlideIn {
            0% {
                opacity: 0;
                transform: translateY(10px);
            }
            100% {
                opacity: 1;
                transform: translateY(0);
            }
        }

        @keyframes typingDot {
            0%, 60%, 100% {
                transform: translateY(0);
                opacity: 0.4;
            }
            30% {
                transform: translateY(-10px);
                opacity: 1;
            }
        }

        /* Rotating word animation */
        .rotating-word {
            display: inline-block;
            background: linear-gradient(135deg, var(--accent-blue) 0%, var(--accent-violet) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            position: relative;
            text-align: left;
        }

  
        .word-fade-out {
            animation: fadeOut 0.5s ease-in-out forwards;
        }

        .word-fade-in {
            animation: fadeIn 0.5s ease-in-out forwards;
        }

        @keyframes fadeOut {
            0% {
                opacity: 1;
                transform: translateY(0px) scale(1);
                filter: blur(0px);
            }
            100% {
                opacity: 0;
                transform: translateY(-10px) scale(0.95);
                filter: blur(2px);
            }
        }

        @keyframes fadeIn {
            0% {
                opacity: 0;
                transform: translateY(10px) scale(0.95);
                filter: blur(2px);
            }
            100% {
                opacity: 1;
                transform: translateY(0px) scale(1);
                filter: blur(0px);
            }
        }

        /* Enhanced input focus styles */
        #chatInput:focus {
            outline: none;
            border-color: var(--accent-blue) !important;
            box-shadow: 0 0 0 3px rgba(58, 111, 248, 0.2) !important;
            background: rgba(255, 255, 255, 0.08) !important;
        }

        /* Volume slider styling */
        input[type="range"] {
            -webkit-appearance: none;
            appearance: none;
            height: 4px;
            background: rgba(255, 255, 255, 0.2);
            border-radius: 2px;
            outline: none;
        }

        input[type="range"]::-webkit-slider-thumb {
            -webkit-appearance: none;
            appearance: none;
            width: 16px;
            height: 16px;
            background: linear-gradient(135deg, var(--accent-blue) 0%, var(--accent-violet) 100%);
            border-radius: 50%;
            cursor: pointer;
            box-shadow: 0 2px 6px rgba(0, 0, 0, 0.2);
        }

        input[type="range"]::-moz-range-thumb {
            width: 16px;
            height: 16px;
            background: linear-gradient(135deg, var(--accent-blue) 0%, var(--accent-violet) 100%);
            border-radius: 50%;
            cursor: pointer;
            border: none;
            box-shadow: 0 2px 6px rgba(0, 0, 0, 0.2);
        }

        /* Checkbox styling */
        input[type="checkbox"] {
            width: 16px;
            height: 16px;
            accent-color: var(--accent-blue);
            cursor: pointer;
        }

        /* Enhanced modal close button */
        .modal-close:focus {
            outline: 2px solid var(--accent-blue);
            outline-offset: 2px;
        }

        /* Reduced motion */
        @media (prefers-reduced-motion: reduce) {
            *,
            *::before,
            *::after {
                animation-duration: 0.01ms !important;
                animation-iteration-count: 1 !important;
                transition-duration: 0.01ms !important;
            }
        }

        @view-transition { navigation: auto; }