/* CSS Variables for Theme */
:root {
    /* Light Theme Colors */
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #f1f5f9;
    --text-primary: #0f172a;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;
    --border-color: #e2e8f0;
    --border-light: #f1f5f9;

    /* Brand Colors - Blue Theme */
    --brand-primary: #3b82f6;
    --brand-primary-hover: #2563eb;
    --brand-secondary: #60a5fa;
    --brand-light: #dbeafe;
    --brand-dark: #1d4ed8;

    /* Accent Colors */
    --accent-success: #10b981;
    --accent-warning: #f59e0b;
    --accent-error: #ef4444;
    --accent-purple: #8b5cf6;

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);

    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

    /* Spacing */
    --container-max: 1280px;
    --header-height: 72px;

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 200ms ease;
    --transition-slow: 300ms ease;
}

html.dark {
    /* Dark Theme Colors */
    --bg-primary: #0b1120;
    --bg-secondary: #1e293b;
    --bg-tertiary: #0f172a;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --border-color: #334155;
    --border-light: #1e293b;

    --brand-primary: #60a5fa;
    --brand-primary-hover: #3b82f6;
    --brand-secondary: #93c5fd;
    --brand-light: #1e3a5f;
    --brand-dark: #2563eb;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    transition: background-color var(--transition-slow), color var(--transition-slow);
    overflow-x: hidden;
}

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

button {
    border: none;
    background: none;
    cursor: pointer;
    font-family: inherit;
}

ul {
    list-style: none;
}

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

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

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    transition: background-color var(--transition-slow), border-color var(--transition-slow);
}

html.dark .header {
    background: rgba(11, 17, 32, 0.8);
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
}

.logo-icon {
    width: 32px;
    height: 32px;
    color: var(--brand-primary);
}

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

.nav-links a {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-secondary);
    transition: color var(--transition-fast);
}

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

.header-actions {
    display: flex;
    align-items: center;
    gap: 16px;
}

.theme-toggle {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 10px;
    color: var(--text-secondary);
    transition: all var(--transition-fast);
}

.theme-toggle:hover {
    background: var(--bg-tertiary);
    color: var(--brand-primary);
}

.theme-toggle svg {
    width: 20px;
    height: 20px;
}

.sun-icon {
    display: block;
}

.moon-icon {
    display: none;
}

html.dark .sun-icon {
    display: none;
}

html.dark .moon-icon {
    display: block;
}

.github-link {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 10px;
    color: var(--text-secondary);
    transition: all var(--transition-fast);
}

.github-link:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.github-link svg {
    width: 20px;
    height: 20px;
}

.huggingface-link {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 10px;
    color: var(--text-secondary);
    transition: all var(--transition-fast);
}

.huggingface-link:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.huggingface-link svg {
    width: 20px;
    height: 20px;
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    width: 40px;
    height: 40px;
    align-items: center;
    justify-content: center;
}

.mobile-menu-toggle span {
    width: 20px;
    height: 2px;
    background: var(--text-primary);
    transition: all var(--transition-fast);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    font-size: 0.95rem;
    font-weight: 600;
    border-radius: 10px;
    transition: all var(--transition-fast);
}

.btn svg {
    width: 18px;
    height: 18px;
}

.btn-primary {
    background: var(--brand-primary);
    color: #ffffff;
}

.btn-primary:hover {
    background: var(--brand-primary-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background: var(--bg-secondary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background: var(--bg-tertiary);
    border-color: var(--brand-primary);
}

.btn-outline {
    background: transparent;
    color: var(--brand-primary);
    border: 1px solid var(--brand-primary);
}

.btn-outline:hover {
    background: var(--brand-primary);
    color: #ffffff;
}

.btn-white {
    background: #ffffff;
    color: var(--brand-primary);
}

.btn-white:hover {
    background: var(--bg-secondary);
}

.btn-outline-white {
    background: transparent;
    color: #ffffff;
    border: 1px solid #ffffff;
}

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

/* Hero Section */
.hero {
    padding: 140px 0 80px;
    background: linear-gradient(180deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
}

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

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: var(--brand-light);
    color: var(--brand-primary);
    font-size: 0.875rem;
    font-weight: 500;
    border-radius: 100px;
    margin-bottom: 24px;
}

.badge-dot {
    width: 8px;
    height: 8px;
    background: var(--brand-primary);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: 24px;
    letter-spacing: -0.02em;
}

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

.hero-description {
    font-size: 1.125rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 32px;
    min-height: 3.4em;
}

#typewriter-text {
    display: inline;
}

.cursor {
    display: inline-block;
    color: var(--brand-primary);
    font-weight: 300;
    animation: blink 1s step-end infinite;
}

@keyframes blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0; }
}

.hero-actions {
    display: flex;
    gap: 16px;
    margin-bottom: 40px;
}

.hero-models {
    display: flex;
    align-items: center;
    gap: 16px;
    flex-wrap: wrap;
}

.models-label {
    font-size: 0.875rem;
    color: var(--text-muted);
}

.model-tags {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.model-tag {
    padding: 6px 12px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--text-secondary);
}

/* Demo Section */
.hero-demo {
    position: relative;
}

.demo-container {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    overflow: hidden;
    box-shadow: var(--shadow-xl);
}

.demo-header {
    display: flex;
    align-items: center;
    padding: 12px 16px;
    background: var(--bg-tertiary);
    border-bottom: 1px solid var(--border-color);
}

.demo-dots {
    display: flex;
    gap: 6px;
}

.demo-dots span {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--border-color);
}

.demo-dots span:first-child {
    background: #ef4444;
}

.demo-dots span:nth-child(2) {
    background: #f59e0b;
}

.demo-dots span:nth-child(3) {
    background: #10b981;
}

.demo-tabs {
    display: flex;
    gap: 4px;
    margin-left: auto;
}

.demo-tab {
    padding: 6px 14px;
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--text-muted);
    border-radius: 6px;
    transition: all var(--transition-fast);
}

.demo-tab:hover {
    color: var(--text-secondary);
    background: var(--bg-secondary);
}

.demo-tab.active {
    background: var(--brand-primary);
    color: #ffffff;
}

.copy-btn {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-left: 12px;
    color: var(--text-muted);
    border-radius: 6px;
    transition: all var(--transition-fast);
}

.copy-btn:hover {
    background: var(--bg-secondary);
    color: var(--text-primary);
}

.copy-btn svg {
    width: 16px;
    height: 16px;
}

.demo-content {
    padding: 20px;
    overflow-x: auto;
}

.code-block {
    font-family: var(--font-mono);
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

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

.section-header {
    text-align: center;
    max-width: 600px;
    margin: 0 auto 60px;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 16px;
    letter-spacing: -0.02em;
}

.section-description {
    font-size: 1.125rem;
    color: var(--text-secondary);
}

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

.feature-card {
    padding: 32px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    transition: all var(--transition-base);
}

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

.feature-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--brand-light);
    color: var(--brand-primary);
    border-radius: 12px;
    margin-bottom: 20px;
}

.feature-icon svg {
    width: 24px;
    height: 24px;
}

.feature-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 12px;
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* Models Section */
.models {
    padding: 100px 0;
    background: var(--bg-secondary);
}

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

.model-card {
    position: relative;
    padding: 28px;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    transition: all var(--transition-base);
}

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

.model-card.featured {
    border-color: var(--brand-primary);
    background: linear-gradient(135deg, var(--brand-light) 0%, var(--bg-primary) 100%);
}

.featured-badge {
    position: absolute;
    top: -10px;
    right: 20px;
    padding: 4px 12px;
    background: var(--brand-primary);
    color: #ffffff;
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: 100px;
}

.featured-label {
    position: absolute;
    top: -10px;
    left: 20px;
    padding: 4px 12px;
    background: var(--brand-primary);
    color: #ffffff;
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: 100px;
}

.model-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 20px;
}

.model-header h3 {
    font-size: 1.25rem;
    font-weight: 600;
}

.model-badge {
    padding: 4px 10px;
    background: var(--brand-light);
    color: var(--brand-primary);
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: 6px;
}

.model-info {
    margin-bottom: 24px;
}

.model-param {
    display: flex;
    justify-content: space-between;
    padding: 8px 0;
    border-bottom: 1px solid var(--border-light);
    margin-bottom: 16px;
}

.param-label {
    font-size: 0.875rem;
    color: var(--text-muted);
}

.param-value {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-primary);
}

.model-capability {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    margin-bottom: 16px;
}

.capability-tag {
    padding: 4px 8px;
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    font-size: 0.75rem;
    border-radius: 4px;
}

.model-desc {
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

.model-action {
    margin-top: auto;
}

.model-action .btn {
    width: 100%;
    justify-content: center;
}

/* Benchmarks Section */
.benchmarks {
    padding: 100px 0;
    background: var(--bg-primary);
}

.benchmark-table-container {
    overflow-x: auto;
    border: 1px solid var(--border-color);
    border-radius: 16px;
}

.benchmark-table {
    width: 100%;
    border-collapse: collapse;
}

.benchmark-table th,
.benchmark-table td {
    padding: 16px 24px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.benchmark-table th {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-secondary);
    background: var(--bg-secondary);
}

.benchmark-table tbody tr {
    transition: background var(--transition-fast);
}

.benchmark-table tbody tr:hover {
    background: var(--bg-secondary);
}

.benchmark-table tbody tr:last-child td {
    border-bottom: none;
}

.model-name {
    font-weight: 600;
    color: var(--text-primary);
}

.score {
    font-weight: 600;
    color: var(--text-secondary);
}

.score.highlight {
    color: var(--brand-primary);
    font-weight: 700;
}

/* Documentation Preview */
.docs-preview {
    padding: 100px 0;
    background: var(--bg-secondary);
}

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

.docs-text h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 16px;
}

.docs-text > p {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: 32px;
}

.docs-features {
    display: flex;
    flex-direction: column;
    gap: 16px;
    margin-bottom: 32px;
}

.docs-feature {
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--text-secondary);
}

.docs-feature svg {
    width: 20px;
    height: 20px;
    color: var(--accent-success);
}

.docs-visual {
    position: relative;
}

.code-preview {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    overflow: hidden;
    box-shadow: var(--shadow-xl);
}

.code-header {
    padding: 12px 20px;
    background: var(--bg-tertiary);
    border-bottom: 1px solid var(--border-color);
    font-size: 0.875rem;
    color: var(--text-secondary);
    font-family: var(--font-mono);
}

.code-preview pre {
    padding: 24px;
    overflow-x: auto;
    font-family: var(--font-mono);
    font-size: 0.875rem;
    line-height: 1.7;
}

.code-preview code {
    color: var(--text-secondary);
}

.code-preview .keyword {
    color: var(--brand-primary);
}

.code-preview .string {
    color: var(--accent-success);
}

.code-preview .function {
    color: var(--brand-secondary);
}

.code-preview .comment {
    color: var(--text-muted);
}

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

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

.pricing-card {
    position: relative;
    padding: 40px 32px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    text-align: center;
    transition: all var(--transition-base);
}

.pricing-card:hover {
    transform: translateY(-4px);
    border-color: var(--brand-primary);
}

.pricing-card.featured {
    border-color: var(--brand-primary);
    background: linear-gradient(180deg, var(--brand-light) 0%, var(--bg-secondary) 100%);
    transform: scale(1.05);
}

.pricing-card.featured:hover {
    transform: scale(1.05) translateY(-4px);
}

.pricing-card h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 16px;
}

.price {
    margin-bottom: 32px;
}

.price .amount {
    font-size: 3rem;
    font-weight: 700;
    color: var(--text-primary);
}

.price .period {
    font-size: 1rem;
    color: var(--text-muted);
}

.pricing-features {
    text-align: left;
    margin-bottom: 32px;
}

.pricing-features li {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 0;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--border-light);
}

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

.pricing-features svg {
    width: 18px;
    height: 18px;
    color: var(--accent-success);
    flex-shrink: 0;
}

.pricing-card .btn {
    width: 100%;
    justify-content: center;
}

/* CTA Section */
.cta-section {
    padding: 100px 0;
    background: linear-gradient(135deg, var(--brand-primary) 0%, var(--brand-dark) 100%);
}

.cta-content {
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}

.cta-content h2 {
    font-size: 2.5rem;
    font-weight: 700;
    color: #ffffff;
    margin-bottom: 16px;
}

.cta-content p {
    font-size: 1.125rem;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 32px;
}

.cta-actions {
    display: flex;
    gap: 16px;
    justify-content: center;
}

/* Sponsors Section */
.sponsors {
    padding: 100px 0;
    background: var(--bg-secondary);
}

.sponsors-tiers {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-bottom: 80px;
}

.sponsor-tier {
    position: relative;
    padding: 40px 32px;
    background: var(--bg-primary);
    border: 2px solid var(--border-color);
    border-radius: 20px;
    text-align: center;
    transition: all var(--transition-base);
}

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

.sponsor-tier.platinum {
    border-color: #e5e4e2;
    background: linear-gradient(180deg, #f8f8f8 0%, var(--bg-primary) 100%);
}

.sponsor-tier.platinum .tier-icon {
    color: #e5e4e2;
}

.sponsor-tier.platinum h3 {
    color: #71717a;
}

.sponsor-tier.gold {
    border-color: #ffd700;
    background: linear-gradient(180deg, #fffbeb 0%, var(--bg-primary) 100%);
    transform: scale(1.05);
}

.sponsor-tier.gold:hover {
    transform: scale(1.05) translateY(-8px);
}

.sponsor-tier.gold .tier-icon {
    color: #fbbf24;
}

.sponsor-tier.gold h3 {
    color: #b45309;
}

.sponsor-tier.silver {
    border-color: #c0c0c0;
    background: linear-gradient(180deg, #f5f5f5 0%, var(--bg-primary) 100%);
}

.sponsor-tier.silver .tier-icon {
    color: #9ca3af;
}

.sponsor-tier.silver h3 {
    color: #6b7280;
}

.tier-header {
    margin-bottom: 28px;
}

.tier-icon {
    width: 48px;
    height: 48px;
    margin-bottom: 16px;
}

.tier-header h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.tier-price {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
}

.tier-benefits {
    text-align: left;
    margin-bottom: 32px;
}

.tier-benefits li {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 12px 0;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--border-light);
    font-size: 0.95rem;
}

.tier-benefits li:last-child {
    border-bottom: none;
}

.tier-benefits svg {
    width: 18px;
    height: 18px;
    color: var(--accent-success);
    flex-shrink: 0;
    margin-top: 2px;
}

.sponsor-tier .btn {
    width: 100%;
    justify-content: center;
}

.sponsors-current {
    margin-bottom: 60px;
}

.sponsors-current h4 {
    text-align: center;
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 32px;
}

.sponsor-logos {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 48px;
    flex-wrap: wrap;
}

.sponsor-logo {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px 28px;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    transition: all var(--transition-fast);
}

.sponsor-logo:hover {
    border-color: var(--brand-primary);
    transform: translateY(-2px);
}

.sponsor-logo svg {
    width: 120px;
    height: 40px;
    color: var(--text-muted);
}

.sponsors-cta {
    max-width: 800px;
    margin: 0 auto;
}

.cta-card {
    display: flex;
    align-items: center;
    gap: 24px;
    padding: 32px 40px;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 16px;
}

.cta-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--brand-light);
    color: var(--brand-primary);
    border-radius: 14px;
    flex-shrink: 0;
}

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

.cta-info {
    flex: 1;
}

.cta-info h4 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 4px;
}

.cta-info p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* Footer */
.footer {
    padding: 80px 0 40px;
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr 1fr;
    gap: 48px;
    margin-bottom: 60px;
}

.footer-brand p {
    margin: 16px 0 24px;
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
}

.social-links {
    display: flex;
    gap: 12px;
}

.social-links a {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    color: var(--text-secondary);
    transition: all var(--transition-fast);
}

.social-links a:hover {
    border-color: var(--brand-primary);
    color: var(--brand-primary);
}

.social-links svg {
    width: 20px;
    height: 20px;
}

.footer-links h4 {
    font-size: 0.95rem;
    font-weight: 600;
    margin-bottom: 20px;
    color: var(--text-primary);
}

.footer-links ul {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-links a {
    font-size: 0.9rem;
    color: var(--text-secondary);
    transition: color var(--transition-fast);
}

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

.footer-bottom {
    padding-top: 40px;
    border-top: 1px solid var(--border-color);
    text-align: center;
}

.footer-bottom p {
    font-size: 0.875rem;
    color: var(--text-muted);
}

/* Responsive Design */
@media (max-width: 1024px) {
    .hero .container {
        grid-template-columns: 1fr;
        gap: 48px;
    }

    .hero-title {
        font-size: 2.75rem;
    }

    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .models-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .docs-content {
        grid-template-columns: 1fr;
        gap: 48px;
    }

    .footer-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .footer-brand {
        grid-column: span 3;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: absolute;
        top: var(--header-height);
        left: 0;
        right: 0;
        flex-direction: column;
        padding: 24px;
        background: var(--bg-primary);
        border-bottom: 1px solid var(--border-color);
        gap: 16px;
    }

    .nav-links.active {
        display: flex;
    }

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

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

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

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

    .hero {
        padding: 120px 0 60px;
    }

    .hero-title {
        font-size: 2.25rem;
    }

    .hero-actions {
        flex-direction: column;
    }

    .hero-actions .btn {
        width: 100%;
        justify-content: center;
    }

    .features-grid {
        grid-template-columns: 1fr;
    }

    .models-grid {
        grid-template-columns: 1fr;
    }

    .pricing-grid {
        grid-template-columns: 1fr;
    }

    .pricing-card.featured {
        transform: none;
    }

    .pricing-card.featured:hover {
        transform: translateY(-4px);
    }

    .cta-content h2 {
        font-size: 2rem;
    }

    .cta-actions {
        flex-direction: column;
    }

    .sponsors-tiers {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .sponsor-tier.gold {
        transform: none;
        order: -1;
    }

    .sponsor-tier.gold:hover {
        transform: translateY(-4px);
    }

    .sponsor-logos {
        gap: 24px;
    }

    .sponsor-logo {
        padding: 16px 20px;
    }

    .sponsor-logo svg {
        width: 100px;
        height: 32px;
    }

    .cta-card {
        flex-direction: column;
        text-align: center;
        padding: 24px;
    }

    .cta-info {
        margin-bottom: 16px;
    }

    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .footer-brand {
        grid-column: span 2;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }

    .hero-title {
        font-size: 1.875rem;
    }

    .section-title {
        font-size: 2rem;
    }

    .model-tags {
        flex-direction: column;
    }

    .sponsor-tier {
        padding: 28px 24px;
    }

    .tier-benefits li {
        font-size: 0.875rem;
        padding: 10px 0;
    }

    .sponsor-logos {
        gap: 16px;
    }

    .sponsor-logo {
        flex: 0 0 calc(50% - 8px);
        padding: 12px 16px;
    }

    .sponsor-logo svg {
        width: 80px;
        height: 28px;
    }

    .footer-grid {
        grid-template-columns: 1fr;
    }

    .footer-brand {
        grid-column: span 1;
    }

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

/* Pay Us Page Styles */
.payus-hero {
    padding: 140px 0 80px;
    background: linear-gradient(180deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
    text-align: center;
}

.payus-hero .hero-content {
    max-width: 600px;
    margin: 0 auto;
}

.payment-methods {
    padding: 80px 0;
    background: var(--bg-primary);
}

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

.payment-card {
    padding: 32px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    text-align: center;
    transition: all var(--transition-base);
}

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

.payment-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    background: var(--brand-light);
    color: var(--brand-primary);
    border-radius: 14px;
}

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

.payment-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 12px;
}

.payment-card > p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 24px;
    line-height: 1.6;
}

.payment-card .btn {
    width: 100%;
    justify-content: center;
}

.payment-card .btn svg {
    width: 18px;
    height: 18px;
}

.qr-code {
    margin-top: 16px;
}

.qr-placeholder {
    width: 140px;
    height: 140px;
    margin: 0 auto 12px;
    padding: 12px;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
}

.qr-placeholder svg {
    width: 100%;
    height: 100%;
}

.qr-hint {
    font-size: 0.875rem;
    color: var(--text-muted);
}

.qr-image {
    width: 160px;
    height: 160px;
    object-fit: contain;
    margin: 0 auto 12px;
    display: block;
    border-radius: 12px;
    border: 2px solid var(--border-color);
    transition: all 0.3s ease;
}

.qr-image:hover {
    border-color: var(--brand-primary);
    transform: scale(1.02);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.logo-image {
    height: 36px;
    width: auto;
    object-fit: contain;
}

.sponsorship-tiers {
    padding: 80px 0;
    background: var(--bg-secondary);
}

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

.tier-card {
    position: relative;
    padding: 32px;
    background: var(--bg-primary);
    border: 2px solid var(--border-color);
    border-radius: 16px;
    text-align: center;
    transition: all var(--transition-base);
}

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

.tier-card.bronze {
    border-color: #cd7f32;
}

.tier-card.bronze .tier-badge {
    background: #cd7f32;
    color: #fff;
}

.tier-card.silver {
    border-color: #c0c0c0;
}

.tier-card.silver .tier-badge {
    background: #9ca3af;
    color: #fff;
}

.tier-card.gold {
    border-color: #ffd700;
    transform: scale(1.05);
}

.tier-card.gold:hover {
    transform: scale(1.05) translateY(-8px);
}

.tier-card.gold .tier-badge {
    background: linear-gradient(135deg, #ffd700 0%, #ffb700 100%);
    color: #78350f;
}

.tier-card.platinum {
    border-color: #e5e4e2;
}

.tier-card.platinum .tier-badge {
    background: linear-gradient(135deg, #e5e4e2 0%, #d4d4d4 100%);
    color: #374151;
}

.tier-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    padding: 6px 16px;
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: 100px;
    white-space: nowrap;
}

.tier-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 8px;
    margin-top: 8px;
}

.tier-amount {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--brand-primary);
    margin-bottom: 24px;
}

.tier-amount .period {
    font-size: 1rem;
    font-weight: 400;
    color: var(--text-muted);
}

.tier-benefits {
    text-align: left;
    margin-bottom: 28px;
}

.tier-benefits li {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    padding: 10px 0;
    color: var(--text-secondary);
    font-size: 0.875rem;
    border-bottom: 1px solid var(--border-light);
}

.tier-benefits li:last-child {
    border-bottom: none;
}

.tier-benefits svg {
    width: 16px;
    height: 16px;
    color: var(--accent-success);
    flex-shrink: 0;
    margin-top: 2px;
}

.tier-card .btn {
    width: 100%;
    justify-content: center;
}

.github-section {
    padding: 80px 0;
    background: var(--bg-primary);
}

.github-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 60px;
}

.github-info {
    flex: 1;
}

.github-icon {
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    margin-bottom: 24px;
}

.github-icon svg {
    width: 36px;
    height: 36px;
    color: var(--text-primary);
}

.github-info h2 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 16px;
}

.github-info p {
    color: var(--text-secondary);
    font-size: 1.1rem;
    line-height: 1.7;
    margin-bottom: 28px;
}

.github-stats {
    display: flex;
    gap: 48px;
}

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

.stat-number {
    display: block;
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--brand-primary);
}

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

.faq-section {
    padding: 80px 0;
    background: var(--bg-secondary);
}

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

.faq-item {
    margin-bottom: 16px;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    overflow: hidden;
}

.faq-question {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 24px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background var(--transition-fast);
}

.faq-question:hover {
    background: var(--bg-secondary);
}

.faq-question svg {
    width: 20px;
    height: 20px;
    color: var(--text-muted);
    transition: transform var(--transition-base);
}

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

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-base);
}

.faq-item.active .faq-answer {
    max-height: 500px;
}

.faq-answer p {
    padding: 0 24px 20px;
    color: var(--text-secondary);
    line-height: 1.7;
    font-size: 0.95rem;
}

@media (max-width: 1024px) {
    .payment-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .tiers-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .tier-card.gold {
        transform: none;
        order: -1;
    }

    .tier-card.gold:hover {
        transform: translateY(-4px);
    }

    .github-content {
        flex-direction: column;
        text-align: center;
    }

    .github-stats {
        justify-content: center;
    }
}

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

    .tiers-grid {
        grid-template-columns: 1fr;
    }

    .github-stats {
        gap: 32px;
    }

    .stat-number {
        font-size: 2rem;
    }

    .faq-question {
        padding: 16px 20px;
        font-size: 0.95rem;
    }

    .faq-answer p {
        padding: 0 20px 16px;
        font-size: 0.9rem;
    }
}