/* ===== CSS RESET & BASE ===== */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #818cf8;
    --secondary: #8b5cf6;
    --accent: #06b6d4;
    --accent-light: #22d3ee;
    --dark: #0f172a;
    --dark-light: #1e293b;
    --gray-900: #111827;
    --gray-800: #1f2937;
    --gray-700: #374151;
    --gray-600: #4b5563;
    --gray-500: #6b7280;
    --gray-400: #9ca3af;
    --gray-300: #d1d5db;
    --gray-200: #e5e7eb;
    --gray-100: #f3f4f6;
    --gray-50: #f9fafb;
    --white: #ffffff;
    --success: #10b981;
    --warning: #f59e0b;
    --error: #ef4444;
    --gradient-primary: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #06b6d4 100%);
    --gradient-dark: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
    --gradient-card: linear-gradient(135deg, rgba(99, 102, 241, 0.1) 0%, rgba(139, 92, 246, 0.1) 100%);
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    --radius-sm: 0.375rem;
    --radius: 0.75rem;
    --radius-md: 1rem;
    --radius-lg: 1.5rem;
    --radius-xl: 2rem;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    color: var(--gray-900);
    background: var(--white);
    overflow-x: hidden;
    line-height: 1.6;
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 700;
    line-height: 1.2;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
}

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

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes fadeInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

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

@keyframes pulse {
    0%, 100% {
        opacity: 1;
        transform: scale(1);
    }
    50% {
        opacity: 0.5;
        transform: scale(1.05);
    }
}

@keyframes rotate {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

@keyframes wave {
    0%, 100% {
        transform: scaleY(1);
    }
    50% {
        transform: scaleY(1.5);
    }
}

@keyframes gradientShift {
    0% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 50%;
    }
    100% {
        background-position: 0% 50%;
    }
}

@keyframes neuralPulse {
    0%, 100% {
        opacity: 0.3;
    }
    50% {
        opacity: 0.8;
    }
}

@keyframes ripple {
    0% {
        transform: scale(0.8);
        opacity: 1;
    }
    100% {
        transform: scale(2.5);
        opacity: 0;
    }
}

.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.animate-on-scroll.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ===== PRELOADER ===== */
.preloader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--gradient-dark);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 99999;
    transition: opacity 0.5s ease, visibility 0.5s ease;
}

.preloader.hidden {
    opacity: 0;
    visibility: hidden;
}

.preloader-content {
    text-align: center;
}

.brain-loader {
    width: 80px;
    height: 80px;
    position: relative;
    margin: 0 auto 20px;
}

.brain-wave {
    position: absolute;
    width: 100%;
    height: 100%;
    border: 3px solid var(--primary);
    border-radius: 50%;
    animation: ripple 2s infinite;
}

.brain-wave:nth-child(1) { animation-delay: 0s; }
.brain-wave:nth-child(2) { animation-delay: 0.4s; }
.brain-wave:nth-child(3) { animation-delay: 0.8s; }
.brain-wave:nth-child(4) { animation-delay: 1.2s; }
.brain-wave:nth-child(5) { animation-delay: 1.6s; }

.preloader-text {
    color: var(--white);
    font-size: 1.2rem;
    font-weight: 700;
    letter-spacing: 3px;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ===== NAVIGATION ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    padding: 20px 0;
    z-index: 1000;
    transition: var(--transition);
    background: transparent;
}

.navbar.scrolled {
    background: rgba(15, 23, 42, 0.95);
    backdrop-filter: blur(20px);
    padding: 15px 0;
    box-shadow: var(--shadow-lg);
}

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

.nav-logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.nav-logo img {
    width: 40px;
    height: 40px;
    border-radius: var(--radius);
}

.nav-logo span {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--white);
}

.nav-logo .highlight {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 32px;
    list-style: none;
}

.nav-links a {
    color: rgba(255, 255, 255, 0.8);
    font-weight: 500;
    font-size: 0.95rem;
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: var(--transition);
}

.nav-links a:hover {
    color: var(--white);
}

.nav-links a:hover::after {
    width: 100%;
}

.nav-cta {
    background: var(--gradient-primary);
    color: var(--white) !important;
    padding: 12px 28px;
    border-radius: 50px;
    font-weight: 600 !important;
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.4);
}

.nav-cta::after {
    display: none !important;
}

.nav-cta:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.6);
}

.mobile-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    z-index: 1001;
}

.mobile-toggle span {
    width: 28px;
    height: 3px;
    background: var(--white);
    border-radius: 3px;
    transition: var(--transition);
}

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

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

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

/* ===== BUTTONS ===== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 16px 32px;
    border-radius: 50px;
    font-weight: 600;
    font-size: 1rem;
    transition: var(--transition);
    cursor: pointer;
    border: none;
    font-family: 'Inter', sans-serif;
}

.btn-primary {
    background: var(--gradient-primary);
    color: var(--white);
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.4);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(99, 102, 241, 0.6);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.1);
    color: var(--white);
    border: 2px solid rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.4);
    transform: translateY(-3px);
}

.btn-large {
    padding: 20px 40px;
    font-size: 1.1rem;
}

/* ===== HERO SECTION ===== */
.hero {
    min-height: 100vh;
    background: var(--gradient-dark);
    position: relative;
    display: flex;
    align-items: center;
    overflow: hidden;
    padding: 120px 0 80px;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
}

.neural-network {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0.1;
}

.gradient-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    animation: float 8s ease-in-out infinite;
}

.orb-1 {
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(99, 102, 241, 0.3) 0%, transparent 70%);
    top: -10%;
    left: -10%;
    animation-delay: 0s;
}

.orb-2 {
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(139, 92, 246, 0.3) 0%, transparent 70%);
    bottom: -10%;
    right: -10%;
    animation-delay: 2s;
}

.orb-3 {
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, rgba(6, 182, 212, 0.3) 0%, transparent 70%);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation-delay: 4s;
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
    position: relative;
    z-index: 2;
}

.hero-content {
    color: var(--white);
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: rgba(99, 102, 241, 0.2);
    border: 1px solid rgba(99, 102, 241, 0.3);
    padding: 10px 20px;
    border-radius: 50px;
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 30px;
    backdrop-filter: blur(10px);
}

.hero-badge i {
    color: var(--primary-light);
}

.hero h1 {
    font-size: 3.5rem;
    margin-bottom: 24px;
    line-height: 1.1;
}

.gradient-text {
    display: block;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    background-size: 200% auto;
    animation: gradientShift 3s ease infinite;
}

.highlight-text {
    display: block;
    color: var(--accent-light);
}

.hero-description {
    font-size: 1.2rem;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 32px;
    line-height: 1.8;
}

.hero-features {
    display: flex;
    flex-direction: column;
    gap: 16px;
    margin-bottom: 40px;
}

.feature-item {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1rem;
    color: rgba(255, 255, 255, 0.9);
}

.feature-item i {
    color: var(--success);
    font-size: 1.2rem;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    margin-bottom: 50px;
    flex-wrap: wrap;
}

.hero-stats {
    display: flex;
    gap: 30px;
    padding: 30px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-lg);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.stat-item {
    text-align: center;
    flex: 1;
}

.stat-number {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 2.5rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 5px;
}

.stat-label {
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.6);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.stat-divider {
    width: 1px;
    background: rgba(255, 255, 255, 0.2);
}

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

.brain-visualization {
    position: relative;
    width: 400px;
    height: 400px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.brain-core {
    position: relative;
    width: 200px;
    height: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.brain-icon {
    width: 150px;
    height: 150px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 4rem;
    color: var(--white);
    box-shadow: 0 0 60px rgba(99, 102, 241, 0.5);
    animation: pulse 3s ease-in-out infinite;
}

.pulse-ring {
    position: absolute;
    width: 100%;
    height: 100%;
    border: 2px solid var(--primary);
    border-radius: 50%;
    animation: ripple 3s infinite;
}

.pulse-ring:nth-child(2) {
    animation-delay: 1s;
}

.pulse-ring:nth-child(3) {
    animation-delay: 2s;
}

.sound-waves {
    position: absolute;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.wave {
    width: 4px;
    height: 60px;
    background: var(--gradient-primary);
    border-radius: 2px;
    animation: wave 1.5s ease-in-out infinite;
}

.wave:nth-child(1) { animation-delay: 0s; height: 40px; }
.wave:nth-child(2) { animation-delay: 0.2s; height: 60px; }
.wave:nth-child(3) { animation-delay: 0.4s; height: 80px; }
.wave:nth-child(4) { animation-delay: 0.6s; height: 60px; }
.wave:nth-child(5) { animation-delay: 0.8s; height: 40px; }

.floating-card {
    position: absolute;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    padding: 16px 24px;
    border-radius: var(--radius);
    box-shadow: var(--shadow-xl);
    display: flex;
    align-items: center;
    gap: 12px;
    animation: float 4s ease-in-out infinite;
}

.floating-card i {
    font-size: 1.5rem;
    color: var(--primary);
}

.card-content strong {
    display: block;
    font-size: 0.9rem;
    color: var(--gray-900);
}

.card-content span {
    font-size: 0.8rem;
    color: var(--success);
    font-weight: 600;
}

.card-1 {
    top: 10%;
    right: 0;
    animation-delay: 0s;
}

.card-2 {
    bottom: 10%;
    left: 0;
    animation-delay: 2s;
}

/* ===== TRUST BAR ===== */
.trust-bar {
    background: var(--gray-50);
    padding: 30px 0;
    border-bottom: 1px solid var(--gray-200);
}

.trust-items {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 50px;
    flex-wrap: wrap;
}

.trust-item {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--gray-600);
    font-size: 0.95rem;
    font-weight: 500;
}

.trust-item i {
    font-size: 1.3rem;
    color: var(--primary);
}

/* ===== SECTION STYLES ===== */
section {
    padding: 100px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 70px;
}

.section-subtitle {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    color: var(--primary);
    font-weight: 600;
    font-size: 0.95rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 16px;
}

.section-subtitle::before,
.section-subtitle::after {
    content: '';
    width: 40px;
    height: 2px;
    background: var(--gradient-primary);
}

.section-title {
    font-size: 3rem;
    color: var(--gray-900);
    margin-bottom: 20px;
}

.section-description {
    font-size: 1.15rem;
    color: var(--gray-600);
    max-width: 700px;
    margin: 0 auto;
    line-height: 1.8;
}

/* ===== SCIENCE SECTION ===== */
.science-section {
    background: var(--white);
}

.science-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-bottom: 60px;
}

.science-card {
    background: var(--white);
    padding: 40px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    border: 1px solid var(--gray-200);
    position: relative;
    overflow: hidden;
}

.science-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--gradient-primary);
}

.science-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-xl);
}

.science-icon {
    width: 70px;
    height: 70px;
    background: var(--gradient-card);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
    font-size: 2rem;
    color: var(--primary);
}

.science-card h3 {
    font-size: 1.5rem;
    margin-bottom: 16px;
    color: var(--gray-900);
}

.science-card p {
    color: var(--gray-600);
    line-height: 1.8;
    margin-bottom: 20px;
}

.science-tag {
    display: inline-block;
    background: var(--gradient-card);
    color: var(--primary);
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
}

.science-cta {
    background: var(--gradient-card);
    padding: 50px;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 40px;
}

.science-cta .cta-content h3 {
    font-size: 2rem;
    margin-bottom: 12px;
    color: var(--gray-900);
}

.science-cta .cta-content p {
    color: var(--gray-600);
    font-size: 1.1rem;
}

/* ===== PROBLEMS SECTION ===== */
.problems-section {
    background: var(--gray-50);
}

.problems-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
}

.problem-card {
    background: var(--white);
    padding: 40px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    transition: var(--transition);
    border-left: 4px solid var(--error);
}

.problem-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.problem-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, rgba(239, 68, 68, 0.1), rgba(239, 68, 68, 0.05));
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    font-size: 1.8rem;
    color: var(--error);
}

.problem-card h3 {
    font-size: 1.4rem;
    margin-bottom: 12px;
    color: var(--gray-900);
}

.problem-card p {
    color: var(--gray-600);
    line-height: 1.8;
}

/* ===== BENEFITS SECTION ===== */
.benefits-section {
    background: var(--white);
}

.benefits-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.benefit-card {
    background: var(--white);
    padding: 40px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    transition: var(--transition);
    text-align: center;
    border: 1px solid var(--gray-200);
}

.benefit-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary);
}

.benefit-icon {
    width: 80px;
    height: 80px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 24px;
    font-size: 2rem;
    color: var(--white);
    box-shadow: 0 8px 20px rgba(99, 102, 241, 0.3);
}

.benefit-card h3 {
    font-size: 1.4rem;
    margin-bottom: 12px;
    color: var(--gray-900);
}

.benefit-card p {
    color: var(--gray-600);
    line-height: 1.8;
}

/* ===== HOW IT WORKS ===== */
.how-it-works-section {
    background: var(--gray-50);
}

.steps-container {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 30px;
    margin-bottom: 60px;
}

.step-card {
    background: var(--white);
    padding: 40px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    text-align: center;
    flex: 1;
    max-width: 350px;
    position: relative;
    transition: var(--transition);
}

.step-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-xl);
}

.step-number {
    position: absolute;
    top: -20px;
    left: 50%;
    transform: translateX(-50%);
    width: 50px;
    height: 50px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--white);
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.4);
}

.step-icon {
    font-size: 3rem;
    color: var(--primary);
    margin-bottom: 20px;
    margin-top: 20px;
}

.step-card h3 {
    font-size: 1.4rem;
    margin-bottom: 12px;
    color: var(--gray-900);
}

.step-card p {
    color: var(--gray-600);
    line-height: 1.8;
}

.step-connector {
    width: 60px;
    height: 3px;
    background: var(--gradient-primary);
    position: relative;
}

.step-connector::after {
    content: '→';
    position: absolute;
    right: -10px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--primary);
    font-size: 1.5rem;
}

.how-it-works-cta {
    background: var(--gradient-primary);
    padding: 50px;
    border-radius: var(--radius-lg);
}

.cta-box {
    display: flex;
    align-items: center;
    gap: 30px;
    color: var(--white);
}

.cta-icon {
    width: 80px;
    height: 80px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    flex-shrink: 0;
}

.cta-box .cta-content {
    flex: 1;
}

.cta-box .cta-content h3 {
    font-size: 2rem;
    margin-bottom: 10px;
}

.cta-box .cta-content p {
    font-size: 1.1rem;
    opacity: 0.9;
}

/* ===== TESTIMONIALS ===== */
.testimonials-section {
    background: var(--white);
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.testimonial-card {
    background: var(--white);
    padding: 40px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    border: 1px solid var(--gray-200);
}

.testimonial-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-xl);
}

.testimonial-rating {
    color: var(--warning);
    margin-bottom: 20px;
    font-size: 1.2rem;
}

.testimonial-text {
    color: var(--gray-700);
    font-size: 1rem;
    line-height: 1.8;
    margin-bottom: 24px;
    font-style: italic;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: 16px;
}

.author-avatar {
    width: 60px;
    height: 60px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    color: var(--white);
    font-size: 1.2rem;
}

.author-info h4 {
    font-size: 1.1rem;
    margin-bottom: 4px;
    color: var(--gray-900);
}

.author-info span {
    font-size: 0.9rem;
    color: var(--gray-500);
    display: block;
    margin-bottom: 6px;
}

.verified-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--success);
    font-size: 0.85rem;
    font-weight: 600;
}

/* ===== PRICING ===== */
.pricing-section {
    background: var(--gradient-dark);
    color: var(--white);
}

.pricing-section .section-title {
    color: var(--white);
}

.pricing-section .section-description {
    color: rgba(255, 255, 255, 0.7);
}

.pricing-card {
    max-width: 600px;
    margin: 0 auto;
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(20px);
    border: 2px solid rgba(99, 102, 241, 0.3);
    border-radius: var(--radius-xl);
    padding: 60px 50px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.pricing-badge {
    position: absolute;
    top: 30px;
    right: -30px;
    background: var(--gradient-primary);
    color: var(--white);
    padding: 8px 40px;
    font-size: 0.85rem;
    font-weight: 700;
    transform: rotate(45deg);
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.4);
}

.pricing-header h3 {
    font-size: 2rem;
    margin-bottom: 8px;
}

.pricing-subtitle {
    color: rgba(255, 255, 255, 0.6);
    font-size: 1.1rem;
    margin-bottom: 30px;
}

.pricing-price {
    margin-bottom: 40px;
}

.price-original {
    text-decoration: line-through;
    color: rgba(255, 255, 255, 0.4);
    font-size: 1.5rem;
    margin-bottom: 10px;
}

.price-current {
    margin-bottom: 10px;
}

.price-current .currency {
    font-size: 2rem;
    color: var(--accent-light);
    vertical-align: top;
}

.price-current .amount {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 5rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.price-savings {
    display: inline-block;
    background: rgba(16, 185, 129, 0.2);
    color: var(--success);
    padding: 8px 20px;
    border-radius: 20px;
    font-size: 0.95rem;
    font-weight: 600;
}

.pricing-features {
    margin-bottom: 40px;
    text-align: left;
}

.pricing-features .feature-item {
    padding: 12px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.9);
}

.pricing-features .feature-item:last-child {
    border-bottom: none;
}

.pricing-features .feature-item i {
    color: var(--success);
}

.pricing-guarantee {
    margin-top: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.9rem;
}

.pricing-guarantee i {
    color: var(--success);
}

/* ===== GUARANTEE ===== */
.guarantee-section {
    background: var(--white);
}

.guarantee-card {
    max-width: 900px;
    margin: 0 auto;
    background: var(--gradient-card);
    padding: 60px;
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    gap: 50px;
    border: 2px solid var(--primary);
}

.guarantee-badge {
    flex-shrink: 0;
    text-align: center;
}

.badge-icon {
    width: 120px;
    height: 120px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    color: var(--white);
    margin: 0 auto 16px;
    box-shadow: 0 10px 30px rgba(99, 102, 241, 0.3);
}

.badge-text .days {
    display: block;
    font-family: 'Space Grotesk', sans-serif;
    font-size: 3rem;
    font-weight: 700;
    color: var(--primary);
    line-height: 1;
}

.badge-text .label {
    font-size: 0.9rem;
    color: var(--gray-600);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.guarantee-content h2 {
    font-size: 2.5rem;
    margin-bottom: 20px;
    color: var(--gray-900);
}

.guarantee-content p {
    color: var(--gray-600);
    font-size: 1.1rem;
    line-height: 1.8;
}

/* ===== FAQ ===== */
.faq-section {
    background: var(--gray-50);
}

.faq-container {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background: var(--white);
    border-radius: var(--radius);
    margin-bottom: 16px;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.faq-item:hover {
    box-shadow: var(--shadow-md);
}

.faq-item.active {
    box-shadow: var(--shadow-lg);
}

.faq-question {
    padding: 24px 30px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    cursor: pointer;
    font-weight: 600;
    font-size: 1.1rem;
    color: var(--gray-900);
    transition: var(--transition);
}

.faq-question:hover {
    color: var(--primary);
}

.faq-question i {
    transition: var(--transition);
    color: var(--primary);
}

.faq-item.active .faq-question i {
    transform: rotate(180deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease, padding 0.4s ease;
}

.faq-item.active .faq-answer {
    max-height: 500px;
    padding: 0 30px 24px;
}

.faq-answer p {
    color: var(--gray-600);
    line-height: 1.8;
}

/* ===== FINAL CTA ===== */
.final-cta {
    background: var(--gradient-dark);
    padding: 120px 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.final-cta::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(99, 102, 241, 0.2) 0%, transparent 70%);
    border-radius: 50%;
}

.final-cta .container {
    position: relative;
    z-index: 1;
}

.final-cta .cta-icon {
    width: 100px;
    height: 100px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    color: var(--white);
    margin: 0 auto 30px;
    box-shadow: 0 10px 40px rgba(99, 102, 241, 0.4);
}

.final-cta h2 {
    font-size: 3rem;
    color: var(--white);
    margin-bottom: 20px;
}

.final-cta p {
    color: rgba(255, 255, 255, 0.8);
    font-size: 1.2rem;
    max-width: 600px;
    margin: 0 auto 40px;
}

.cta-features {
    display: flex;
    justify-content: center;
    gap: 30px;
    margin-top: 30px;
    flex-wrap: wrap;
}

.cta-features .feature {
    display: flex;
    align-items: center;
    gap: 8px;
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.95rem;
}

.cta-features .feature i {
    color: var(--success);
}

/* ===== FOOTER ===== */
.footer {
    background: var(--gray-900);
    color: var(--gray-400);
    padding: 80px 0 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 60px;
    margin-bottom: 50px;
}

.footer-brand .nav-logo {
    margin-bottom: 20px;
}

.footer-brand p {
    font-size: 0.95rem;
    line-height: 1.8;
    max-width: 400px;
}

.footer-links h4 {
    color: var(--white);
    font-size: 1.1rem;
    margin-bottom: 20px;
}

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

.footer-links ul li {
    margin-bottom: 12px;
}

.footer-links ul li a {
    color: var(--gray-400);
    font-size: 0.95rem;
    transition: var(--transition);
}

.footer-links ul li a:hover {
    color: var(--primary-light);
    padding-left: 5px;
}

.footer-bottom {
    border-top: 1px solid var(--gray-800);
    padding-top: 30px;
    text-align: center;
}

.footer-bottom p {
    margin-bottom: 15px;
    font-size: 0.9rem;
}

.footer-disclaimer {
    font-size: 0.8rem;
    color: var(--gray-500);
    max-width: 900px;
    margin: 0 auto;
    line-height: 1.7;
}

/* ===== SCROLL TO TOP ===== */
.scroll-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 1.2rem;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 999;
    box-shadow: 0 4px 20px rgba(99, 102, 241, 0.4);
}

.scroll-top.visible {
    opacity: 1;
    visibility: visible;
}

.scroll-top:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px rgba(99, 102, 241, 0.6);
}

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
    .hero .container {
        grid-template-columns: 1fr;
        gap: 60px;
        text-align: center;
    }
    
    .hero h1 {
        font-size: 2.8rem;
    }
    
    .hero-features {
        align-items: center;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .hero-stats {
        max-width: 500px;
        margin: 0 auto;
    }
    
    .brain-visualization {
        width: 300px;
        height: 300px;
    }
    
    .brain-icon {
        width: 120px;
        height: 120px;
        font-size: 3rem;
    }
    
    .floating-card {
        display: none;
    }
    
    .science-grid {
        grid-template-columns: 1fr;
    }
    
    .problems-grid {
        grid-template-columns: 1fr;
    }
    
    .benefits-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .steps-container {
        flex-direction: column;
    }
    
    .step-connector {
        width: 3px;
        height: 40px;
    }
    
    .step-connector::after {
        content: '↓';
        right: 50%;
        top: auto;
        bottom: -15px;
        transform: translateX(50%);
    }
    
    .testimonials-grid {
        grid-template-columns: 1fr;
    }
    
    .guarantee-card {
        flex-direction: column;
        text-align: center;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 40px;
        text-align: center;
    }
    
    .footer-brand p {
        margin: 0 auto;
    }
}

@media (max-width: 768px) {
    .nav-links {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        max-width: 350px;
        height: 100vh;
        background: var(--dark);
        flex-direction: column;
        align-items: center;
        justify-content: center;
        gap: 30px;
        transition: var(--transition);
        box-shadow: -10px 0 30px rgba(0, 0, 0, 0.3);
    }
    
    .nav-links.active {
        right: 0;
    }
    
    .mobile-toggle {
        display: flex;
    }
    
    .hero {
        padding: 100px 0 60px;
    }
    
    .hero h1 {
        font-size: 2.2rem;
    }
    
    .hero-description {
        font-size: 1.05rem;
    }
    
    .section-title {
        font-size: 2.2rem;
    }
    
    .benefits-grid {
        grid-template-columns: 1fr;
    }
    
    .science-cta {
        flex-direction: column;
        text-align: center;
    }
    
    .how-it-works-cta .cta-box {
        flex-direction: column;
        text-align: center;
    }
    
    .pricing-card {
        padding: 40px 30px;
    }
    
    .guarantee-card {
        padding: 40px 30px;
    }
    
    .final-cta h2 {
        font-size: 2.2rem;
    }
    
    .cta-features {
        flex-direction: column;
        gap: 15px;
    }
}

@media (max-width: 480px) {
    .hero h1 {
        font-size: 1.8rem;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: 20px;
    }
    
    .stat-divider {
        width: 100%;
        height: 1px;
    }
    
    .btn {
        padding: 14px 28px;
        font-size: 0.95rem;
    }
    
    .btn-large {
        padding: 16px 32px;
        font-size: 1rem;
    }
    
    .section-title {
        font-size: 1.8rem;
    }
    
    .trust-items {
        gap: 20px;
    }
    
    .trust-item {
        font-size: 0.85rem;
    }
}