/* =====================================================
   Brain Glow Landing Page - Cameroon Edition
   Design System: Primary (#00BCD4), Secondary (#F472B6), Accent (#14B8A6)
   ===================================================== */

/* CSS Variables */
:root {
    /* Brand Colors */
    --primary: #00BCD4;
    --primary-light: #4DD0E1;
    --primary-dark: #0097A7;
    --primary-50: #E0F7FA;
    --primary-100: #B2EBF2;
    
    --secondary: #F472B6;
    --secondary-light: #F9A8D4;
    --secondary-dark: #EC4899;
    
    --accent: #14B8A6;
    --accent-light: #2DD4BF;
    --accent-dark: #0D9488;
    
    /* Semantic Colors */
    --success: #10B981;
    --warning: #F59E0B;
    --error: #EF4444;
    --info: #3B82F6;
    
    /* Neutrals */
    --white: #FFFFFF;
    --gray-50: #F9FAFB;
    --gray-100: #F3F4F6;
    --gray-200: #E5E7EB;
    --gray-300: #D1D5DB;
    --gray-400: #9CA3AF;
    --gray-500: #6B7280;
    --gray-600: #4B5563;
    --gray-700: #374151;
    --gray-800: #1F2937;
    --gray-900: #111827;
    --black: #000000;
    
    /* Category Colors */
    --blue: #3B82F6;
    --purple: #8B5CF6;
    --pink: #EC4899;
    --green: #10B981;
    --orange: #F59E0B;
    --teal: #14B8A6;
    
    /* Mobile Money Colors */
    --mtn: #FFCC00;
    --orange-money: #FF6B00;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px -1px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-2xl: 32px;
    --radius-full: 9999px;
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    
    /* Transitions */
    --transition: all 0.3s ease;
    --transition-fast: all 0.15s ease;
}

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

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

body {
    font-family: var(--font-family);
    color: var(--gray-800);
    line-height: 1.6;
    background: var(--white);
    overflow-x: hidden;
}

a {
    text-decoration: none;
    color: inherit;
}

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

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    color: var(--gray-900);
}

h1 { font-size: clamp(2.5rem, 5vw, 4rem); }
h2 { font-size: clamp(2rem, 4vw, 3rem); }
h3 { font-size: clamp(1.25rem, 2.5vw, 1.5rem); }

.gradient-text {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 50%, var(--accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Gradient text for light backgrounds (cyan) */
.gradient-text-light {
    color: var(--white);
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.2);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    border-radius: var(--radius-full);
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    white-space: nowrap;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: var(--white);
    box-shadow: 0 4px 14px 0 rgba(0, 188, 212, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px 0 rgba(0, 188, 212, 0.5);
}

.btn-secondary {
    background: var(--white);
    color: var(--gray-800);
    border: 2px solid var(--gray-200);
}

.btn-secondary:hover {
    border-color: var(--primary);
    color: var(--primary);
}

.btn-outline {
    background: transparent;
    color: var(--primary);
    border: 2px solid var(--primary);
}

.btn-outline:hover {
    background: var(--primary);
    color: var(--white);
}

.btn-lg {
    padding: 16px 32px;
    font-size: 1.1rem;
}

.btn-full {
    width: 100%;
}

.btn .icon {
    width: 20px;
    height: 20px;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 16px 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid transparent;
    transition: var(--transition);
}

.navbar.scrolled {
    padding: 12px 0;
    border-bottom-color: var(--gray-200);
    box-shadow: var(--shadow);
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 1.5rem;
    font-weight: 800;
}

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

.logo-icon {
    font-size: 1.75rem;
}

.logo-text {
    color: var(--gray-900);
    font-weight: 700;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 32px;
}

/* Navigation Store Buttons */
.nav-store-buttons {
    display: flex;
    gap: 8px;
}

.store-btn-mini {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 14px;
    background: var(--white);
    color: var(--gray-800);
    border: 2px solid var(--gray-800);
    border-radius: var(--radius-lg);
    font-size: 0.85rem;
    font-weight: 600;
    transition: var(--transition);
    text-decoration: none;
}

.store-btn-mini span {
    color: var(--gray-800);
}

.store-btn-mini svg {
    width: 16px;
    height: 16px;
    fill: var(--gray-800);
}

.store-btn-mini:hover {
    background: var(--primary);
    border-color: var(--primary);
    color: var(--white);
    transform: translateY(-2px);
}

.store-btn-mini:hover span {
    color: var(--white);
}

.store-btn-mini:hover svg {
    fill: var(--white);
}

.nav-links a {
    font-weight: 500;
    color: var(--gray-600);
    transition: var(--transition-fast);
}

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

.btn-nav {
    padding: 10px 20px;
    font-size: 0.95rem;
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 8px;
    background: none;
    border: none;
    cursor: pointer;
}

.mobile-menu-btn span {
    width: 24px;
    height: 2px;
    background: var(--gray-800);
    border-radius: 2px;
    transition: var(--transition);
}

/* Hero Section */
.hero {
    position: relative;
    padding: 140px 0 100px;
    overflow: hidden;
    background: linear-gradient(180deg, var(--primary-50) 0%, var(--white) 100%);
}

.hero-bg {
    position: absolute;
    inset: 0;
    overflow: hidden;
    pointer-events: none;
}

.gradient-blob {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.5;
}

.blob-1 {
    width: 600px;
    height: 600px;
    background: var(--primary-100);
    top: -200px;
    right: -100px;
}

.blob-2 {
    width: 400px;
    height: 400px;
    background: var(--secondary-light);
    bottom: 0;
    left: -100px;
    opacity: 0.3;
}

.blob-3 {
    width: 300px;
    height: 300px;
    background: var(--accent-light);
    top: 50%;
    left: 50%;
    opacity: 0.3;
}

.hero-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-content {
    position: relative;
    z-index: 1;
}

.badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: var(--white);
    border-radius: var(--radius-full);
    box-shadow: var(--shadow);
    font-size: 0.9rem;
    font-weight: 500;
    margin-bottom: 24px;
}

.flag {
    font-size: 1.25rem;
}

.hero h1 {
    margin-bottom: 24px;
}

.hero-subtitle {
    font-size: 1.2rem;
    color: var(--gray-600);
    margin-bottom: 32px;
    max-width: 540px;
}

/* Hero Store Buttons */
.hero-store-buttons {
    display: flex;
    gap: 16px;
    margin-bottom: 24px;
    flex-wrap: wrap;
}

.hero-store-buttons .store-button:hover {
    background: var(--gray-800);
}

.hero-cta {
    display: flex;
    gap: 16px;
    margin-bottom: 48px;
    flex-wrap: wrap;
}

.hero-stats {
    display: flex;
    align-items: center;
    gap: 24px;
}

.stat {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 2rem;
    font-weight: 800;
    color: var(--primary);
}

.stat-label {
    font-size: 0.9rem;
    color: var(--gray-500);
}

.stat-divider {
    width: 1px;
    height: 40px;
    background: var(--gray-200);
}

/* Phone Mockup */
.hero-image {
    position: relative;
    display: flex;
    justify-content: center;
}

.phone-mockup {
    position: relative;
    z-index: 2;
}

.phone-frame {
    width: 280px;
    height: 560px;
    background: var(--gray-900);
    border-radius: 40px;
    padding: 12px;
    box-shadow: var(--shadow-2xl);
}

.phone-screen {
    width: 100%;
    height: 100%;
    background: var(--white);
    border-radius: 32px;
    overflow: hidden;
}

.screen-content {
    padding: 40px 16px 16px;
}

.mock-header {
    margin-bottom: 24px;
}

.mock-greeting {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--gray-800);
}

.mock-card {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px;
    background: var(--gray-50);
    border-radius: var(--radius-md);
    margin-bottom: 12px;
    font-weight: 500;
    transition: var(--transition);
}

.mock-card.featured {
    background: linear-gradient(135deg, var(--primary-50) 0%, var(--accent-light) 100%);
    border: 1px solid var(--primary-light);
}

.mock-icon {
    font-size: 1.5rem;
}

.floating-card {
    position: absolute;
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 16px;
    background: var(--white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    font-size: 0.9rem;
    font-weight: 500;
    animation: float 3s ease-in-out infinite;
}

.card-1 {
    top: 60px;
    right: -30px;
}

.card-2 {
    bottom: 100px;
    left: -40px;
    animation-delay: 1.5s;
}

.floating-icon {
    font-size: 1.25rem;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

.hero-wave {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 120px;
}

.hero-wave svg {
    width: 100%;
    height: 100%;
}

/* Section Styles */
section {
    padding: 100px 0;
}

.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 60px;
}

.section-badge {
    display: inline-block;
    padding: 6px 16px;
    background: var(--primary-50);
    color: var(--primary-dark);
    border-radius: var(--radius-full);
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 16px;
}

.section-header p {
    font-size: 1.15rem;
    color: var(--gray-600);
    margin-top: 16px;
}

/* Features Section */
.features {
    background: var(--white);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.feature-card {
    position: relative;
    padding: 32px;
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-xl);
    transition: var(--transition);
}

.feature-card:hover {
    border-color: var(--primary-light);
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

.feature-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-lg);
    margin-bottom: 20px;
}

.feature-icon svg {
    width: 28px;
    height: 28px;
}

.icon-blue {
    background: rgba(59, 130, 246, 0.1);
    color: var(--blue);
}

.icon-pink {
    background: rgba(244, 114, 182, 0.1);
    color: var(--secondary);
}

.icon-teal {
    background: rgba(20, 184, 166, 0.1);
    color: var(--teal);
}

.icon-purple {
    background: rgba(139, 92, 246, 0.1);
    color: var(--purple);
}

.icon-orange {
    background: rgba(245, 158, 11, 0.1);
    color: var(--orange);
}

.icon-green {
    background: rgba(16, 185, 129, 0.1);
    color: var(--green);
}

.feature-card h3 {
    margin-bottom: 12px;
}

.feature-card p {
    color: var(--gray-600);
    font-size: 0.95rem;
    margin-bottom: 16px;
}

.feature-tag {
    display: inline-block;
    padding: 4px 12px;
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
}

.feature-tag.free {
    background: rgba(16, 185, 129, 0.1);
    color: var(--success);
}

.feature-tag.premium {
    background: rgba(245, 158, 11, 0.1);
    color: var(--warning);
}

.feature-tag.ai {
    background: rgba(139, 92, 246, 0.1);
    color: var(--purple);
}

/* GCE Section */
.gce-section {
    background: linear-gradient(180deg, var(--gray-50) 0%, var(--white) 100%);
}

.gce-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.gce-text .section-badge {
    margin-bottom: 20px;
}

.gce-text h2 {
    margin-bottom: 20px;
}

.gce-text > p {
    color: var(--gray-600);
    font-size: 1.1rem;
    margin-bottom: 32px;
}

.gce-features {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.gce-feature {
    display: flex;
    gap: 16px;
}

.check-icon {
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--success);
    color: var(--white);
    border-radius: var(--radius-full);
    font-size: 0.85rem;
    font-weight: 700;
    flex-shrink: 0;
    margin-top: 2px;
}

.gce-feature strong {
    display: block;
    margin-bottom: 4px;
    color: var(--gray-900);
}

.gce-feature p {
    color: var(--gray-500);
    font-size: 0.95rem;
}

.gce-subjects {
    display: flex;
    justify-content: center;
}

.subject-cloud {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    max-width: 500px;
    justify-content: center;
}

.subject-tag {
    padding: 10px 20px;
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-full);
    font-weight: 500;
    transition: var(--transition);
}

.subject-tag:hover {
    border-color: var(--primary);
    background: var(--primary-50);
    color: var(--primary-dark);
}

.tag-lg { font-size: 1rem; }
.tag-md { font-size: 0.9rem; }
.tag-sm { font-size: 0.85rem; }

/* University Section */
.university-section {
    background: var(--white);
}

.university-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    margin-bottom: 48px;
}

.university-card {
    padding: 32px 24px;
    text-align: center;
    background: var(--gray-50);
    border-radius: var(--radius-xl);
    transition: var(--transition);
}

.university-card:hover {
    background: var(--primary-50);
    transform: translateY(-4px);
}

.uni-icon {
    font-size: 3rem;
    margin-bottom: 16px;
}

.university-card h3 {
    font-size: 1.1rem;
    margin-bottom: 8px;
}

.university-card p {
    font-size: 0.9rem;
    color: var(--gray-500);
}

.university-cta {
    text-align: center;
}

.university-cta p {
    color: var(--gray-600);
    margin-bottom: 16px;
}

/* AI Section */
.ai-section {
    background: linear-gradient(180deg, var(--gray-900) 0%, var(--gray-800) 100%);
    color: var(--white);
}

.ai-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.ai-visual {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 32px;
}

.ai-avatar {
    position: relative;
    width: 120px;
    height: 120px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.avatar-glow {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    border-radius: 50%;
    filter: blur(20px);
    opacity: 0.5;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); opacity: 0.5; }
    50% { transform: scale(1.1); opacity: 0.7; }
}

.avatar-icon {
    position: relative;
    z-index: 1;
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
}

.ai-chat-demo {
    width: 100%;
    max-width: 340px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.chat-bubble {
    padding: 14px 18px;
    border-radius: var(--radius-lg);
    font-size: 0.95rem;
    line-height: 1.5;
    max-width: 90%;
}

.chat-bubble.user {
    background: var(--primary);
    color: var(--white);
    align-self: flex-end;
    border-bottom-right-radius: 4px;
}

.chat-bubble.ai {
    background: var(--gray-700);
    color: var(--gray-100);
    align-self: flex-start;
    border-bottom-left-radius: 4px;
}

.chat-bubble.typing {
    display: flex;
    gap: 6px;
    padding: 18px;
}

.dot {
    width: 8px;
    height: 8px;
    background: var(--gray-400);
    border-radius: 50%;
    animation: typing 1.5s ease-in-out infinite;
}

.dot:nth-child(2) { animation-delay: 0.2s; }
.dot:nth-child(3) { animation-delay: 0.4s; }

@keyframes typing {
    0%, 60%, 100% { transform: translateY(0); }
    30% { transform: translateY(-8px); }
}

.ai-text .section-badge {
    background: rgba(0, 188, 212, 0.2);
    color: var(--primary-light);
}

.ai-text h2 {
    color: var(--white);
}

.ai-text > p {
    color: var(--gray-400);
    font-size: 1.1rem;
    margin-bottom: 32px;
}

.ai-features-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.ai-feature {
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--gray-300);
}

.ai-feature-icon {
    font-size: 1.25rem;
}

/* Pricing Section */
.pricing-section {
    background: var(--gray-50);
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
    max-width: 800px;
    margin: 0 auto 48px;
}

.pricing-card {
    position: relative;
    background: var(--white);
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-2xl);
    overflow: hidden;
    transition: var(--transition);
}

.pricing-card:hover {
    border-color: var(--primary-light);
    box-shadow: var(--shadow-xl);
}

.pricing-card.featured {
    border-color: var(--primary);
    box-shadow: var(--shadow-xl);
    transform: scale(1.02);
}

.popular-badge {
    position: absolute;
    top: 16px;
    right: 16px;
    padding: 6px 12px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
    color: var(--white);
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 600;
}

.pricing-header {
    padding: 32px 32px 24px;
    text-align: center;
    border-bottom: 1px solid var(--gray-100);
}

.pricing-header h3 {
    font-size: 1.5rem;
    margin-bottom: 16px;
}

.price {
    display: flex;
    align-items: baseline;
    justify-content: center;
    gap: 4px;
}

.amount {
    font-size: 3rem;
    font-weight: 800;
    color: var(--gray-900);
}

.currency {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--gray-600);
}

.period {
    display: block;
    margin-top: 8px;
    color: var(--gray-500);
}

.pricing-body {
    padding: 24px 32px 32px;
}

.pricing-features {
    list-style: none;
    margin-bottom: 24px;
}

.pricing-features li {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 0;
    color: var(--gray-700);
}

.pricing-features li.disabled {
    color: var(--gray-400);
}

.check {
    color: var(--success);
    font-weight: 700;
}

.check.premium {
    color: var(--warning);
}

.x {
    color: var(--gray-300);
}

.payment-methods {
    text-align: center;
}

.payment-methods p {
    color: var(--gray-600);
    margin-bottom: 16px;
}

.payment-logos {
    display: flex;
    justify-content: center;
    gap: 24px;
}

.payment-logo {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 20px;
    background: var(--white);
    border-radius: var(--radius-lg);
    font-weight: 600;
    border: 2px solid transparent;
    transition: var(--transition);
}

.payment-logo.mtn {
    border-color: var(--mtn);
    color: var(--gray-800);
}

.payment-logo.orange {
    border-color: var(--orange-money);
    color: var(--gray-800);
}

.momo-icon {
    font-size: 1.25rem;
}

/* How It Works Section */
.how-it-works-section {
    background: var(--gray-50);
}

.how-it-works-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
    margin-bottom: 48px;
}

.how-card {
    position: relative;
    padding: 32px;
    background: var(--white);
    border-radius: var(--radius-xl);
    text-align: center;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.how-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.step-number {
    position: absolute;
    top: -16px;
    left: 50%;
    transform: translateX(-50%);
    width: 32px;
    height: 32px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.9rem;
}

.how-icon {
    font-size: 3rem;
    margin-bottom: 16px;
}

.how-card h3 {
    margin-bottom: 12px;
    color: var(--gray-900);
}

.how-card p {
    color: var(--gray-600);
    font-size: 0.95rem;
    line-height: 1.6;
}

.credit-ways {
    text-align: center;
    padding: 32px;
    background: var(--white);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow);
}

.credit-ways h4 {
    margin-bottom: 24px;
    color: var(--gray-900);
    font-size: 1.25rem;
}

.credit-methods {
    display: flex;
    justify-content: center;
    gap: 24px;
    flex-wrap: wrap;
}

.credit-method {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    padding: 16px 24px;
    background: var(--primary-50);
    border-radius: var(--radius-lg);
    transition: var(--transition);
}

.credit-method:hover {
    background: var(--primary-100);
    transform: translateY(-2px);
}

.credit-icon {
    font-size: 1.75rem;
}

.credit-method span:last-child {
    font-weight: 600;
    color: var(--gray-700);
    font-size: 0.9rem;
}

/* Testimonials Section */
.testimonials-section {
    background: var(--white);
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.testimonial-card {
    padding: 32px;
    background: var(--gray-50);
    border-radius: var(--radius-xl);
    transition: var(--transition);
}

.testimonial-card:hover {
    background: var(--white);
    box-shadow: var(--shadow-lg);
}

.stars {
    color: var(--warning);
    font-size: 1.25rem;
    letter-spacing: 2px;
    margin-bottom: 16px;
}

.testimonial-card > p {
    color: var(--gray-700);
    font-size: 1rem;
    line-height: 1.6;
    margin-bottom: 24px;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: 12px;
}

.author-avatar {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
}

.testimonial-author strong {
    display: block;
    color: var(--gray-900);
}

.testimonial-author span {
    font-size: 0.85rem;
    color: var(--gray-500);
}

/* Download Section */
.download-section {
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
    color: var(--white);
    text-align: center;
}

.download-content h2 {
    color: var(--white);
    margin-bottom: 16px;
}

.download-content > p {
    font-size: 1.15rem;
    opacity: 0.9;
    max-width: 600px;
    margin: 0 auto 32px;
}

.download-buttons {
    display: flex;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
    margin-bottom: 32px;
}

.store-button {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 24px;
    background: var(--black);
    color: var(--white);
    border-radius: var(--radius-lg);
    transition: var(--transition);
}

.store-button:hover {
    background: var(--gray-800);
    transform: translateY(-2px);
}

.store-icon {
    width: 32px;
    height: 32px;
}

.store-text {
    text-align: left;
}

.store-label {
    display: block;
    font-size: 0.7rem;
    opacity: 0.7;
}

.store-name {
    display: block;
    font-size: 1.1rem;
    font-weight: 600;
}

.qr-section {
    display: flex;
    justify-content: center;
}

.qr-placeholder {
    width: 120px;
    height: 120px;
    background: var(--white);
    border-radius: var(--radius-lg);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.qr-placeholder span {
    font-size: 2rem;
}

.qr-placeholder p {
    font-size: 0.7rem;
    color: var(--gray-500);
}

/* Footer */
.footer {
    background: var(--gray-900);
    color: var(--gray-400);
    padding: 80px 0 32px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 48px;
    padding-bottom: 48px;
    border-bottom: 1px solid var(--gray-700);
}

.footer-brand .logo {
    margin-bottom: 16px;
}

.footer-brand p {
    font-size: 0.95rem;
    max-width: 280px;
    margin-bottom: 24px;
}

.social-links {
    display: flex;
    gap: 16px;
}

.social-links a {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gray-800);
    border-radius: 50%;
    transition: var(--transition);
}

.social-links a:hover {
    background: var(--primary);
}

.social-links svg {
    width: 18px;
    height: 18px;
}

.footer-links h4 {
    color: var(--white);
    font-size: 1rem;
    margin-bottom: 20px;
}

.footer-links a {
    display: block;
    padding: 8px 0;
    color: var(--gray-400);
    font-size: 0.95rem;
    transition: var(--transition-fast);
}

.footer-links a:hover {
    color: var(--primary-light);
}

.footer-seo {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 24px;
    margin-top: 24px;
}

.footer-seo p {
    font-size: 0.85rem;
    color: var(--gray-400);
    line-height: 1.7;
    text-align: center;
    max-width: 900px;
    margin: 0 auto;
}

.footer-bottom {
    padding-top: 32px;
    text-align: center;
    font-size: 0.9rem;
}

.footer-keywords {
    font-size: 0.75rem;
    color: var(--gray-500);
    margin-top: 8px;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-content {
        order: 1;
    }
    
    .hero-image {
        order: 2;
        margin-top: 40px;
    }
    
    .hero-subtitle {
        margin: 0 auto 32px;
    }
    
    .hero-cta {
        justify-content: center;
    }
    
    .hero-store-buttons {
        justify-content: center;
    }
    
    .hero-stats {
        justify-content: center;
    }
    
    .floating-card {
        display: none;
    }
    
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .gce-content {
        grid-template-columns: 1fr;
        gap: 48px;
    }
    
    .gce-subjects {
        order: 2;
    }
    
    .university-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .ai-content {
        grid-template-columns: 1fr;
        gap: 48px;
    }
    
    .ai-visual {
        order: 2;
    }
    
    .ai-text {
        text-align: center;
    }
    
    .ai-features-list {
        align-items: center;
    }
    
    .testimonials-grid {
        grid-template-columns: 1fr;
        max-width: 500px;
        margin: 0 auto;
    }
    
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
    
    .nav-store-buttons {
        display: none;
    }
    
    .how-it-works-grid {
        grid-template-columns: 1fr;
        max-width: 400px;
        margin: 0 auto 48px;
    }
    
    .credit-methods {
        gap: 12px;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: var(--white);
        padding: 24px;
        flex-direction: column;
        box-shadow: var(--shadow-lg);
    }
    
    .nav-links.active {
        display: flex;
    }
    
    .mobile-menu-btn {
        display: flex;
    }
    
    .mobile-menu-btn.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    
    .mobile-menu-btn.active span:nth-child(2) {
        opacity: 0;
    }
    
    .mobile-menu-btn.active span:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -5px);
    }
    
    section {
        padding: 60px 0;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .pricing-grid {
        grid-template-columns: 1fr;
        max-width: 400px;
    }
    
    .pricing-card.featured {
        transform: none;
    }
    
    .university-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }
    
    .hero-cta {
        flex-direction: column;
        align-items: center;
    }
    
    .hero-store-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .nav-store-buttons {
        flex-direction: column;
        gap: 8px;
    }
    
    .hero-stats {
        flex-wrap: wrap;
    }
    
    .stat-divider {
        display: none;
    }
    
    .phone-frame {
        width: 240px;
        height: 480px;
    }
    
    .download-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .payment-logos {
        flex-direction: column;
        align-items: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }
    
    h1 { font-size: 2rem; }
    h2 { font-size: 1.75rem; }
    
    .feature-card {
        padding: 24px;
    }
    
    .pricing-header,
    .pricing-body {
        padding: 24px;
    }
    
    .amount {
        font-size: 2.5rem;
    }
}