/* Aubook Website Styles */

:root {
    --primary: #1a1a1a;
    --primary-dark: #000000;
    --primary-light: #404040;
    --secondary: #666666;
    --accent: #2563eb;
    --background: #FAFAFA;
    --surface: #FFFFFF;
    --text: #1a1a1a;
    --text-light: #6b7280;
    --border: #e5e7eb;
    --success: #48BB78;
    --warning: #ECC94B;
    --radius: 8px;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 4px 6px rgba(0, 0, 0, 0.1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--background);
    color: var(--text);
    line-height: 1.6;
}

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

/* Navigation */
.navbar {
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 16px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: var(--text);
}

.logo-img {
    width: 40px;
    height: 40px;
    border-radius: 10px;
}

.logo-text {
    font-size: 24px;
    font-weight: 700;
}

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

.nav-links a {
    text-decoration: none;
    color: var(--text-light);
    font-weight: 500;
    transition: color 0.2s;
}

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

.nav-cta {
    background: var(--primary);
    color: white;
    padding: 10px 20px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: background 0.2s;
}

.nav-cta:hover {
    background: var(--primary-dark);
}

/* Hero Section */
.hero {
    padding: 80px 24px;
    max-width: 1000px;
    margin: 0 auto;
    text-align: center;
}

.hero-content h1 {
    font-size: 48px;
    font-weight: 600;
    line-height: 1.2;
    margin-bottom: 24px;
    color: var(--text);
}

.hero-subtitle {
    font-size: 18px;
    color: var(--text-light);
    margin-bottom: 16px;
    line-height: 1.6;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.hero-subtitle-secondary {
    font-size: 16px;
    color: var(--text-light);
    margin-bottom: 32px;
    font-style: italic;
    opacity: 0.9;
}

.hero-buttons {
    display: flex;
    justify-content: center;
    gap: 16px;
    margin-bottom: 48px;
}

/* Hero Highlights */
.hero-highlights {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin-top: 48px;
    text-align: left;
}

.hero-highlight {
    padding: 20px 24px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 12px;
}

.hero-highlight strong {
    display: block;
    font-size: 15px;
    font-weight: 600;
    margin-bottom: 6px;
    color: var(--text);
}

.hero-highlight span {
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.5;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 14px 28px;
    border-radius: 10px;
    font-weight: 600;
    font-size: 16px;
    text-decoration: none;
    transition: all 0.2s;
    cursor: pointer;
    border: none;
}

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

.btn-primary:hover {
    background: #1a202c;
    transform: translateY(-2px);
}

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

.btn-secondary:hover {
    border-color: var(--text);
    transform: translateY(-2px);
}

.btn-large {
    padding: 18px 36px;
    font-size: 18px;
}

.apple-icon,
.github-icon {
    width: 24px;
    height: 24px;
}

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

.phone-mockup {
    width: 280px;
    height: 580px;
    background: #1a1a2e;
    border-radius: 40px;
    padding: 12px;
    box-shadow: var(--shadow-lg);
}

.phone-screen {
    background: linear-gradient(180deg, #1a1a2e 0%, #16213e 100%);
    border-radius: 32px;
    height: 100%;
    padding: 20px;
    overflow: hidden;
}

.mockup-header {
    color: white;
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 24px;
}

.mockup-books {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.mockup-book {
    aspect-ratio: 2/3;
    background: rgba(255,255,255,0.2);
    border-radius: 8px;
}

/* Features Section */
.features {
    padding: 100px 0;
    background: var(--surface);
}

.section-title {
    font-size: 40px;
    font-weight: 700;
    text-align: center;
    margin-bottom: 16px;
}

.section-subtitle {
    font-size: 18px;
    color: var(--text-light);
    text-align: center;
    margin-bottom: 60px;
}

/* Player Quick List */
.player-quick-list {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 16px 24px;
    margin-bottom: 48px;
}

.player-quick-list span {
    font-size: 14px;
    color: var(--text-light);
    background: var(--background);
    padding: 8px 16px;
    border-radius: 20px;
    border: 1px solid var(--border);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.feature-card {
    background: var(--background);
    padding: 32px;
    border-radius: var(--radius);
    transition: transform 0.2s, box-shadow 0.2s;
    border-left: 4px solid var(--primary);
}

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

.feature-card h3 {
    font-size: 20px;
    margin-bottom: 12px;
}

.feature-card p {
    color: var(--text-light);
    font-size: 15px;
}

/* How It Works */
.how-it-works {
    padding: 100px 0;
}

.steps {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 24px;
    flex-wrap: wrap;
}

.step {
    text-align: center;
    max-width: 200px;
}

.step-number {
    width: 60px;
    height: 60px;
    background: var(--primary);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    font-weight: 700;
    margin: 0 auto 16px;
}

.step h3 {
    font-size: 18px;
    margin-bottom: 8px;
}

.step p {
    color: var(--text-light);
    font-size: 14px;
}

.step-arrow {
    font-size: 32px;
    color: var(--border);
}

/* Pricing */
.pricing {
    padding: 100px 0;
    background: var(--surface);
}

.pricing-cards {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    max-width: 1000px;
    margin: 0 auto;
}

.pricing-card {
    background: var(--background);
    border-radius: var(--radius);
    padding: 28px;
    position: relative;
    border: 1px solid var(--border);
}

.pricing-card.featured {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
}

.pricing-badge {
    position: absolute;
    top: -12px;
    right: 24px;
    background: var(--secondary);
    color: white;
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 11px;
    font-weight: 700;
}

.pricing-header h3 {
    font-size: 18px;
    margin-bottom: 4px;
}

.price {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 4px;
}

.price-detail {
    font-size: 13px;
    color: var(--text-light);
    margin-bottom: 16px;
}

.pricing-card.featured .price-detail {
    color: rgba(255,255,255,0.7);
}

.pricing-credits {
    margin-bottom: 16px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border);
}

.pricing-card.featured .pricing-credits {
    border-color: rgba(255,255,255,0.2);
}

.credits-number {
    font-size: 28px;
    font-weight: 700;
    display: block;
}

.credits-label {
    font-size: 13px;
    color: var(--text-light);
}

.pricing-card.featured .credits-label {
    color: rgba(255,255,255,0.7);
}

.pricing-features {
    list-style: none;
}

.pricing-features li {
    padding: 6px 0;
    font-size: 13px;
}

.pricing-card.featured .pricing-features li {
    color: rgba(255,255,255,0.9);
}

.pricing-note {
    margin-top: 24px;
    font-size: 13px;
    opacity: 0.8;
}

/* CTA Section */
.cta {
    padding: 80px 0;
    text-align: center;
    background: var(--primary);
    color: white;
}

.cta h2 {
    font-size: 36px;
    margin-bottom: 16px;
}

.cta p {
    font-size: 18px;
    opacity: 0.9;
    margin-bottom: 12px;
}

.cta-secondary {
    font-size: 15px;
    opacity: 0.75;
    margin-bottom: 32px;
}

/* Footer */
.footer {
    background: var(--text);
    color: white;
    padding: 48px 0 24px;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 32px;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 8px;
}

.footer-brand .logo-text {
    color: white;
}

.footer-links {
    display: flex;
    gap: 32px;
}

.footer-links a {
    color: rgba(255,255,255,0.7);
    text-decoration: none;
    transition: color 0.2s;
}

.footer-links a:hover {
    color: white;
}

.footer-bottom {
    text-align: center;
    padding-top: 24px;
    border-top: 1px solid rgba(255,255,255,0.1);
}

.footer-bottom p {
    color: rgba(255,255,255,0.5);
    font-size: 14px;
}

/* Page Hero (for subpages) */
.page-hero {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: white;
    padding: 80px 0;
    text-align: center;
}

.page-hero h1 {
    font-size: 48px;
    margin-bottom: 16px;
}

.page-hero p {
    font-size: 18px;
    opacity: 0.9;
}

/* Guide Page */
.guide-content {
    padding: 60px 0;
}

.guide-content .container {
    display: grid;
    grid-template-columns: 200px 1fr;
    gap: 60px;
}

.guide-nav {
    position: sticky;
    top: 100px;
    height: fit-content;
}

.guide-nav a {
    display: block;
    padding: 12px 0;
    color: var(--text-light);
    text-decoration: none;
    border-left: 3px solid transparent;
    padding-left: 16px;
    transition: all 0.2s;
}

.guide-nav a:hover {
    color: var(--primary);
    border-left-color: var(--primary);
}

.guide-section {
    margin-bottom: 60px;
}

.guide-section h2 {
    font-size: 32px;
    margin-bottom: 24px;
    padding-bottom: 12px;
    border-bottom: 2px solid var(--border);
}

.guide-card {
    background: var(--surface);
    padding: 32px;
    border-radius: var(--radius);
    margin-bottom: 24px;
    box-shadow: var(--shadow);
}

.guide-card h3 {
    font-size: 20px;
    margin-bottom: 16px;
}

.guide-card ol,
.guide-card ul {
    margin-left: 24px;
}

.guide-card li {
    margin-bottom: 8px;
}

.guide-card.highlight {
    border-left: 4px solid var(--primary);
}

.tip {
    background: rgba(107, 70, 193, 0.1);
    padding: 16px;
    border-radius: 8px;
    margin-top: 16px;
}

.guide-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 16px;
}

.guide-table th,
.guide-table td {
    padding: 12px;
    text-align: left;
    border-bottom: 1px solid var(--border);
}

.guide-table th {
    background: var(--background);
    font-weight: 600;
}

.key-links {
    margin-top: 24px;
    padding-top: 24px;
    border-top: 1px solid rgba(255,255,255,0.2);
}

.key-links h4 {
    margin-bottom: 12px;
}

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

.faq-item {
    margin-top: 20px;
}

.faq-item h4 {
    font-size: 16px;
    margin-bottom: 8px;
}

code {
    background: var(--background);
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 14px;
}

/* Privacy Page */
.privacy-content {
    padding: 60px 0;
}

.privacy-content .container {
    max-width: 800px;
}

.privacy-highlight {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: white;
    padding: 40px;
    border-radius: var(--radius);
    margin-bottom: 40px;
    text-align: center;
}

.privacy-highlight h2 {
    margin-bottom: 12px;
}

.privacy-section {
    margin-bottom: 40px;
}

.privacy-section h2 {
    font-size: 24px;
    margin-bottom: 16px;
    color: var(--primary);
}

.privacy-section h3 {
    font-size: 18px;
    margin: 24px 0 12px;
}

.privacy-list {
    list-style: none;
}

.privacy-list li {
    padding: 8px 0;
    padding-left: 28px;
    position: relative;
}

.privacy-list li::before {
    content: "✕";
    position: absolute;
    left: 0;
    color: #E53E3E;
    font-weight: bold;
}

.privacy-table {
    width: 100%;
    border-collapse: collapse;
    margin: 16px 0;
}

.privacy-table th,
.privacy-table td {
    padding: 12px 16px;
    text-align: left;
    border: 1px solid var(--border);
}

.privacy-table th {
    background: var(--background);
    font-weight: 600;
}

.third-party-card {
    background: var(--background);
    padding: 24px;
    border-radius: var(--radius);
    margin: 16px 0;
}

.third-party-card h3 {
    margin: 0 0 12px;
}

.third-party-card ul {
    list-style: none;
}

.third-party-card li {
    padding: 4px 0;
}

.third-party-card a {
    color: var(--primary);
}

.warning-box {
    background: #FFFBEB;
    border-left: 4px solid var(--warning);
    padding: 16px;
    margin: 24px 0;
    border-radius: 0 8px 8px 0;
}

.privacy-summary {
    background: var(--surface);
    padding: 32px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    margin: 40px 0;
}

.privacy-summary h2 {
    margin-bottom: 20px;
}

.privacy-footer {
    text-align: center;
    padding: 40px;
    background: var(--background);
    border-radius: var(--radius);
}

/* Responsive */
@media (max-width: 900px) {
    .hero {
        grid-template-columns: 1fr;
        text-align: center;
        padding: 60px 24px;
    }
    
    .hero-content h1 {
        font-size: 40px;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .hero-image {
        display: none;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .steps {
        flex-direction: column;
    }
    
    .step-arrow {
        transform: rotate(90deg);
    }
    
    .pricing-cards {
        grid-template-columns: 1fr;
    }
    
    .guide-content .container {
        grid-template-columns: 1fr;
    }
    
    .guide-nav {
        position: static;
        display: flex;
        flex-wrap: wrap;
        gap: 8px;
        margin-bottom: 32px;
    }
    
    .guide-nav a {
        border-left: none;
        background: var(--background);
        padding: 8px 16px;
        border-radius: 20px;
    }
    
    .nav-links {
        display: none;
    }
}

@media (max-width: 600px) {
    .nav-container {
        padding: 12px 16px;
    }
    
    .hero-content h1 {
        font-size: 32px;
    }
    
    .section-title {
        font-size: 28px;
    }
    
    .page-hero h1 {
        font-size: 32px;
    }
    
    .footer-content {
        flex-direction: column;
        gap: 24px;
    }
}

/* ==========================================
   NEW STYLES FOR UPDATED LANDING PAGE
   ========================================== */

/* Hero Badge */
.hero-badge {
    display: inline-block;
    background: #f3f4f6;
    border: 1px solid var(--border);
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 13px;
    font-weight: 500;
    margin-bottom: 24px;
    color: var(--text-light);
}

.gradient-text {
    color: var(--text);
}

/* Hero Stats */
.hero-stats {
    display: flex;
    justify-content: center;
    gap: 48px;
    margin-top: 48px;
    padding-top: 32px;
    border-top: 1px solid var(--border);
}

.stat {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 28px;
    font-weight: 600;
    color: var(--text);
}

.stat-label {
    font-size: 14px;
    color: var(--text-light);
}

/* Use Cases Section */
.use-cases {
    padding: 80px 24px;
    background: var(--surface);
}

.use-cases-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    max-width: 1000px;
    margin: 40px auto 0;
}

.use-case {
    text-align: center;
    padding: 24px;
}

.use-case-icon {
    font-size: 32px;
    margin-bottom: 12px;
    opacity: 0.8;
}

.use-case-icon:empty {
    display: none;
}

.use-case h3 {
    font-size: 18px;
    margin-bottom: 8px;
}

.use-case p {
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.5;
}

/* Featured Feature Cards */
.feature-card.featured-card {
    grid-column: span 2;
    background: #f9fafb;
    border: 1px solid var(--border);
}

.feature-icon {
    font-size: 24px;
    margin-bottom: 12px;
    opacity: 0.7;
}

.feature-icon:empty {
    display: none;
}

.feature-list {
    list-style: none;
    margin-top: 16px;
    padding: 0;
}

.feature-list li {
    padding: 6px 0;
    font-size: 14px;
    color: var(--text-light);
    padding-left: 20px;
    position: relative;
}

.feature-list li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--primary);
}

/* Steps Vertical Layout */
.steps-vertical {
    max-width: 600px;
    margin: 40px auto 0;
}

.step-item {
    display: flex;
    gap: 24px;
    padding: 24px 0;
    border-bottom: 1px solid var(--border);
}

.step-item:last-child {
    border-bottom: none;
}

.step-item .step-number {
    width: 48px;
    height: 48px;
    min-width: 48px;
    background: var(--primary);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    font-weight: 700;
}

.step-content h3 {
    margin-bottom: 8px;
    font-size: 18px;
}

.step-content p {
    color: var(--text-light);
    font-size: 15px;
    line-height: 1.6;
}

/* Pricing Explainer */
.pricing-explainer {
    text-align: center;
    margin: 40px 0;
}

.credit-math {
    background: var(--surface);
    display: inline-block;
    padding: 32px 48px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.credit-equation {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    font-size: 24px;
}

.credit-number {
    font-weight: 600;
    color: var(--text);
    font-size: 32px;
}

.credit-label {
    color: var(--text-light);
}

.credit-equals {
    font-size: 32px;
    color: var(--text-light);
}

.credit-example {
    margin-top: 16px;
    color: var(--text-light);
    font-size: 14px;
}

/* Updated Pricing Cards */
.pricing-cards {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    max-width: 1200px;
    margin: 0 auto;
}

.pricing-card {
    background: var(--surface);
    border-radius: var(--radius);
    padding: 24px;
    box-shadow: var(--shadow);
    position: relative;
    display: flex;
    flex-direction: column;
}

.pricing-card.featured {
    border: 1px solid var(--text);
}

.pricing-badge {
    position: absolute;
    top: -10px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--text);
    color: white;
    padding: 4px 12px;
    border-radius: 4px;
    font-size: 10px;
    font-weight: 600;
    letter-spacing: 0.5px;
    white-space: nowrap;
}

.pricing-header h3 {
    font-size: 16px;
    margin-bottom: 8px;
}

.price {
    font-size: 28px;
    font-weight: 600;
    color: var(--text);
}

.price-detail {
    font-size: 13px;
    color: var(--text-light);
    margin-bottom: 16px;
}

.pricing-credits {
    text-align: center;
    padding: 16px 0;
    background: var(--background);
    border-radius: 8px;
    margin-bottom: 16px;
}

.credits-number {
    display: block;
    font-size: 28px;
    font-weight: 700;
    color: var(--text);
}

.credits-label {
    font-size: 13px;
    color: var(--text-light);
}

.pricing-features {
    list-style: none;
    padding: 0;
    margin: 0;
    flex: 1;
}

.pricing-features li {
    padding: 8px 0;
    font-size: 13px;
    color: var(--text-light);
    border-bottom: 1px solid var(--border);
}

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

.pricing-note {
    margin-top: 16px;
    padding: 12px;
    background: var(--background);
    border-radius: 8px;
    font-size: 12px;
    text-align: center;
    color: var(--text-light);
}

.btn-block {
    display: block;
    width: 100%;
    text-align: center;
    margin-top: 16px;
}

/* BYOK Section */
.byok-section {
    margin-top: 48px;
}

.byok-card {
    background: var(--background);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px 32px;
    max-width: 700px;
    margin: 0 auto;
    text-align: center;
}

.byok-card h3 {
    font-size: 16px;
    margin-bottom: 8px;
}

.byok-card p {
    color: var(--text-light);
    font-size: 14px;
    line-height: 1.6;
    margin: 0;
}

.byok-icon {
    display: none;
}

.byok-content h3 {
    font-size: 18px;
    margin-bottom: 12px;
}

.byok-content > p {
    color: var(--text-light);
    margin-bottom: 16px;
    line-height: 1.6;
}

.byok-features {
    list-style: none;
    padding: 0;
    margin: 0;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
}

.byok-features li {
    font-size: 14px;
    color: var(--text);
    padding-left: 20px;
    position: relative;
}

.byok-features li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--primary);
}

/* FAQ Section */
.faq {
    padding: 80px 24px;
    background: var(--surface);
}

.faq-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
    max-width: 1000px;
    margin: 40px auto 0;
}

.faq-item {
    padding: 24px;
    background: var(--background);
    border-radius: var(--radius);
}

.faq-item h3 {
    font-size: 16px;
    margin-bottom: 12px;
    color: var(--text);
}

.faq-item p {
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.6;
}

.faq-item-featured {
    background: linear-gradient(135deg, #f97316 0%, #ea580c 100%);
    color: white;
}

.faq-item-featured h3 {
    color: white;
}

.faq-item-featured p {
    color: rgba(255, 255, 255, 0.9);
}

/* Footer Tagline */
.footer-tagline {
    font-size: 14px;
    color: var(--text-light);
    margin-top: 8px;
}

/* Responsive Updates */
@media (max-width: 1200px) {
    .pricing-cards {
        grid-template-columns: repeat(3, 1fr);
        max-width: 700px;
    }
    
    .pricing-card.featured {
        grid-column: span 1;
    }
}

@media (max-width: 800px) {
    .pricing-cards {
        grid-template-columns: repeat(2, 1fr);
        max-width: 500px;
    }
}

@media (max-width: 900px) {
    .use-cases-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .feature-card.featured-card {
        grid-column: span 1;
    }
    
    .pricing-cards {
        grid-template-columns: 1fr 1fr;
    }
    
    .pricing-card.featured {
        grid-column: span 2;
    }
    
    .hero-stats {
        gap: 32px;
    }
    
    .faq-grid {
        grid-template-columns: 1fr;
    }
    
    .byok-card {
        flex-direction: column;
        text-align: center;
    }
    
    .byok-features {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 600px) {
    .use-cases-grid {
        grid-template-columns: 1fr;
    }
    
    .pricing-cards {
        grid-template-columns: 1fr;
    }
    
    .pricing-card.featured {
        grid-column: span 1;
        transform: none;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: 16px;
    }
    
    .credit-math {
        padding: 24px;
    }
    
    .credit-equation {
        flex-wrap: wrap;
        gap: 8px;
    }
    
    .overview-grid {
        grid-template-columns: 1fr;
    }
    
    .import-methods {
        grid-template-columns: 1fr;
    }
    
    .tts-features {
        grid-template-columns: 1fr;
    }
}

/* Overview Section */
.overview {
    padding: 60px 0;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
}

.overview-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
}

.overview-item {
    text-align: center;
    padding: 24px;
}

.overview-icon {
    font-size: 48px;
    margin-bottom: 16px;
}

.overview-item h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 12px;
}

.overview-item p {
    color: var(--text-light);
    font-size: 15px;
    line-height: 1.6;
}

/* Why Choose Aubook Section */
.why-choose {
    padding: 80px 0;
    background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
}

.why-choose .section-title {
    margin-bottom: 48px;
}

.why-choose-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
    max-width: 900px;
    margin: 0 auto;
}

.why-choose-item {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    background: var(--surface);
    padding: 24px;
    border-radius: 12px;
    border: 1px solid var(--border);
}

.why-icon {
    font-size: 28px;
    flex-shrink: 0;
}

.why-choose-item strong {
    display: block;
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 4px;
}

.why-choose-item p {
    font-size: 14px;
    color: var(--text-light);
    margin: 0;
    line-height: 1.5;
}

@media (max-width: 768px) {
    .why-choose-grid {
        grid-template-columns: 1fr;
    }
}

/* Import Section */
.import-section {
    padding: 100px 0;
    background: var(--background);
}

.import-methods {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
    margin-bottom: 60px;
}

.import-method {
    background: var(--surface);
    padding: 40px;
    border-radius: var(--radius);
    border: 1px solid var(--border);
}

.import-method h3 {
    font-size: 22px;
    font-weight: 600;
    margin-bottom: 16px;
}

.import-method p {
    color: var(--text-light);
    font-size: 15px;
    line-height: 1.7;
    margin-bottom: 20px;
}

.import-method ul {
    list-style: none;
    padding: 0;
}

.import-method ul li {
    padding: 8px 0;
    padding-left: 24px;
    position: relative;
    color: var(--text);
    font-size: 15px;
}

.import-method ul li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--success);
    font-weight: 600;
}

.format-support {
    text-align: center;
    padding: 40px;
    background: var(--surface);
    border-radius: var(--radius);
    border: 1px solid var(--border);
}

.format-support h3 {
    font-size: 20px;
    margin-bottom: 24px;
}

.formats-list {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 20px;
}

.format-tag {
    background: var(--primary);
    color: white;
    padding: 8px 20px;
    border-radius: 20px;
    font-size: 14px;
    font-weight: 600;
}

.format-note {
    color: var(--text-light);
    font-size: 14px;
    font-style: italic;
}

/* TTS Section */
.tts-section {
    padding: 100px 0;
    background: var(--surface);
}

.tts-pain-points {
    display: flex;
    justify-content: center;
    gap: 32px;
    margin: 32px 0;
    flex-wrap: wrap;
}

.pain-point {
    font-size: 15px;
    color: var(--text-light);
    background: var(--background);
    padding: 12px 20px;
    border-radius: 24px;
    border: 1px solid var(--border);
}

.tts-solution {
    font-size: 20px;
    font-weight: 600;
    text-align: center;
    margin-bottom: 48px;
    color: var(--text);
}

.tts-content {
    max-width: 900px;
    margin: 0 auto;
}

.tts-main > p {
    font-size: 18px;
    color: var(--text-light);
    text-align: center;
    margin-bottom: 48px;
    line-height: 1.7;
}

.tts-features {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
}

.tts-feature {
    background: var(--background);
    padding: 28px;
    border-radius: var(--radius);
    border-left: 4px solid var(--secondary);
}

.tts-feature h4 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 12px;
}

.tts-feature p {
    color: var(--text-light);
    font-size: 14px;
    line-height: 1.6;
}

@media (max-width: 768px) {
    .tts-pain-points {
        flex-direction: column;
        align-items: center;
        gap: 12px;
    }
}

/* Pricing Note Box */
.pricing-note-box {
    background: var(--background);
    border: 2px solid var(--success);
    border-radius: var(--radius);
    padding: 24px 32px;
    max-width: 700px;
    margin: 0 auto 48px;
    text-align: center;
}

.pricing-note-box p {
    font-size: 16px;
    color: var(--text);
    margin: 0;
}

/* Responsive adjustments for new sections */
@media (max-width: 900px) {
    .overview-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }
    
    .import-methods {
        grid-template-columns: 1fr;
    }
    
    .tts-features {
        grid-template-columns: 1fr;
    }
}

/* LibriVox Section */
.librivox-section {
    padding: 100px 0;
    background: linear-gradient(135deg, #f97316 0%, #ea580c 100%);
    color: white;
}

.librivox-hero {
    text-align: center;
    margin-bottom: 60px;
}

.librivox-badge {
    display: inline-block;
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    padding: 10px 24px;
    border-radius: 30px;
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 20px;
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.librivox-section .section-title {
    color: white;
    font-size: 44px;
}

.librivox-section .section-subtitle {
    color: rgba(255, 255, 255, 0.9);
    font-size: 20px;
    max-width: 600px;
    margin: 0 auto;
}

.librivox-intro {
    font-size: 18px;
    text-align: center;
    max-width: 800px;
    margin: 0 auto 48px;
    line-height: 1.7;
    color: rgba(255, 255, 255, 0.95);
}

.librivox-features {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    margin-bottom: 60px;
}

.librivox-feature {
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(10px);
    padding: 28px;
    border-radius: 16px;
    text-align: center;
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: transform 0.2s, background 0.2s;
}

.librivox-feature:hover {
    transform: translateY(-4px);
    background: rgba(255, 255, 255, 0.2);
}

.librivox-feature-icon {
    font-size: 36px;
    margin-bottom: 16px;
}

.librivox-feature h4 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 12px;
}

.librivox-feature p {
    font-size: 14px;
    line-height: 1.6;
    color: rgba(255, 255, 255, 0.9);
}

.librivox-examples {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    padding: 40px;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.librivox-examples h3 {
    text-align: center;
    font-size: 24px;
    margin-bottom: 32px;
}

.librivox-books {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}

.librivox-book {
    background: rgba(255, 255, 255, 0.15);
    padding: 20px;
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.librivox-book strong {
    display: block;
    font-size: 16px;
    margin-bottom: 6px;
}

.librivox-book span {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.8);
}

.librivox-note {
    text-align: center;
    margin-top: 24px;
    font-size: 14px;
    color: rgba(255, 255, 255, 0.8);
    font-style: italic;
}

/* Hero highlight featured (for LibriVox) */
.hero-highlight-featured {
    background: linear-gradient(135deg, #f97316 0%, #ea580c 100%);
    color: white;
    border: none;
}

.hero-highlight-featured strong {
    color: white;
}

.hero-highlight-featured span {
    color: rgba(255, 255, 255, 0.9);
}

/* Overview grid update for 4 items */
.overview-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 32px;
}

@media (max-width: 1000px) {
    .overview-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .hero-highlights {
        grid-template-columns: 1fr;
        gap: 12px;
    }
    
    .librivox-features {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .librivox-books {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 600px) {
    .overview-grid {
        grid-template-columns: 1fr;
    }
    
    .librivox-features {
        grid-template-columns: 1fr;
    }
    
    .librivox-books {
        grid-template-columns: 1fr;
    }
    
    .librivox-section .section-title {
        font-size: 32px;
    }
}