/* CSS Variables */
:root {
    --primary-color: #2563eb;
    --primary-dark: #1d4ed8;
    --primary-light: #3b82f6;
    --secondary-color: #0f172a;
    --accent-color: #06b6d4;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    --text-primary: #1e293b;
    --text-secondary: #475569;
    --text-light: #64748b;
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #f1f5f9;
    --border-color: #e2e8f0;
    --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);
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --transition: all 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    overflow-x: hidden;
}

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

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }

p { margin-bottom: 1rem; }

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

a:hover {
    color: var(--primary-dark);
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--secondary-color);
}

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

.nav-menu {
    display: flex;
    list-style: none;
    gap: 0.5rem;
}

.nav-link {
    padding: 0.5rem 1rem;
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-weight: 500;
    transition: var(--transition);
}

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

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.nav-toggle span {
    width: 25px;
    height: 3px;
    background: var(--secondary-color);
    border-radius: 3px;
    transition: var(--transition);
}

/* Hero Section */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 100px 1.5rem 4rem;
    background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
    overflow: hidden;
}

.hero-content {
    text-align: center;
    max-width: 800px;
    z-index: 1;
}

.hero-title {
    font-size: 3.5rem;
    margin-bottom: 1.5rem;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--accent-color) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.875rem 1.75rem;
    border-radius: var(--radius-lg);
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    border: none;
    transition: var(--transition);
    text-align: center;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: white;
    box-shadow: 0 4px 14px 0 rgb(37 99 235 / 0.39);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px 0 rgb(37 99 235 / 0.23);
    color: white;
}

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

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

.btn-large {
    padding: 1rem 2.5rem;
    font-size: 1.125rem;
}

/* Hero Shapes */
.hero-shapes {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    pointer-events: none;
}

.shape {
    position: absolute;
    border-radius: 50%;
    opacity: 0.1;
}

.shape-1 {
    width: 400px;
    height: 400px;
    background: var(--primary-color);
    top: -100px;
    right: -100px;
    animation: float 6s ease-in-out infinite;
}

.shape-2 {
    width: 300px;
    height: 300px;
    background: var(--accent-color);
    bottom: -50px;
    left: -50px;
    animation: float 8s ease-in-out infinite reverse;
}

.shape-3 {
    width: 200px;
    height: 200px;
    background: var(--success-color);
    top: 50%;
    left: 10%;
    animation: float 10s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-30px); }
}

/* Sections */
.section {
    padding: 5rem 0;
}

.section-title {
    text-align: center;
    margin-bottom: 3rem;
    position: relative;
}

.section-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 4px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--accent-color) 100%);
    margin: 1rem auto 0;
    border-radius: 2px;
}

.bg-light {
    background: var(--bg-secondary);
}

/* Features Grid */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.feature-card {
    background: var(--bg-primary);
    padding: 2rem;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    border: 1px solid var(--border-color);
}

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

.feature-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.feature-card h3 {
    margin-bottom: 0.75rem;
}

.feature-card p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.feature-link {
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.feature-link:hover {
    gap: 0.75rem;
}

/* Stats */
.stats {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: white;
    padding: 4rem 0;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    text-align: center;
}

.stat-item {
    padding: 1rem;
}

.stat-number {
    display: block;
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.stat-label {
    font-size: 1rem;
    opacity: 0.9;
}

/* Overview */
.overview-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.overview-text {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.overview-highlights {
    margin-top: 2rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    text-align: left;
}

.highlight {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
}

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

/* CTA Section */
.cta {
    background: linear-gradient(135deg, var(--secondary-color) 0%, #1e3a5f 100%);
    color: white;
    text-align: center;
}

.cta-content h2 {
    color: white;
    margin-bottom: 1rem;
}

.cta-content p {
    opacity: 0.9;
    margin-bottom: 2rem;
    font-size: 1.125rem;
}

/* Footer */
.footer {
    background: var(--secondary-color);
    color: white;
    padding: 4rem 0 2rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-section h4 {
    color: white;
    margin-bottom: 1rem;
}

.footer-section p {
    opacity: 0.8;
    font-size: 0.875rem;
}

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

.footer-section ul li {
    margin-bottom: 0.5rem;
}

.footer-section a {
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.875rem;
}

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

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 2rem;
    text-align: center;
    opacity: 0.7;
    font-size: 0.875rem;
}

/* Page Header */
.page-header {
    padding: 140px 0 4rem;
    background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
    text-align: center;
}

.page-header h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.page-header p {
    color: var(--text-secondary);
    font-size: 1.125rem;
}

/* Timeline */
.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
    padding-left: 2rem;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 4px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--accent-color) 100%);
    border-radius: 2px;
}

.timeline-item {
    position: relative;
    padding-bottom: 3rem;
    padding-left: 2rem;
}

.timeline-marker {
    position: absolute;
    left: -2.5rem;
    width: 3rem;
    height: 3rem;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.875rem;
    box-shadow: var(--shadow-md);
}

.timeline-content {
    background: var(--bg-primary);
    padding: 1.5rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
}

.timeline-content h2 {
    margin-bottom: 0.5rem;
}

.timeline-date {
    color: var(--primary-color);
    font-weight: 600;
    margin-bottom: 1rem;
}

.timeline-content ul {
    margin: 1rem 0;
    padding-left: 1.5rem;
}

.timeline-content li {
    margin-bottom: 0.5rem;
}

/* Milestones */
.milestones-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.milestone-card {
    background: var(--bg-primary);
    padding: 1.5rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    border-left: 4px solid var(--primary-color);
    transition: var(--transition);
}

.milestone-card:hover {
    transform: translateX(5px);
}

.milestone-year {
    display: inline-block;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-sm);
    font-weight: 700;
    font-size: 0.875rem;
    margin-bottom: 0.75rem;
}

.milestone-card h3 {
    margin-bottom: 0.5rem;
}

.milestone-card p {
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin-bottom: 0;
}

/* Intro Block */
.intro-block {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.intro-block p {
    font-size: 1.125rem;
    color: var(--text-secondary);
}

/* Models Grid */
.models-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

.model-card {
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    overflow: hidden;
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.model-card:hover {
    box-shadow: var(--shadow-xl);
    transform: translateY(-3px);
}

.model-header {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: white;
    padding: 1.25rem 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.model-header h3 {
    color: white;
    margin: 0;
}

.model-company {
    background: rgba(255, 255, 255, 0.2);
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
}

.model-body {
    padding: 1.5rem;
}

.model-description {
    margin-bottom: 1rem;
    font-size: 0.9375rem;
}

.model-details {
    margin: 1rem 0;
}

.detail {
    display: flex;
    flex-direction: column;
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--border-color);
}

.detail:last-child {
    border-bottom: none;
}

.detail strong {
    color: var(--primary-color);
    margin-bottom: 0.25rem;
}

.detail span {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.model-impact {
    background: var(--bg-tertiary);
    padding: 1rem;
    border-radius: var(--radius-md);
    margin: 1rem 0 0;
    font-size: 0.875rem;
}

/* Multimodal Grid */
.multimodal-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.multimodal-card {
    background: var(--bg-primary);
    padding: 1.5rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
}

.multimodal-card h3 {
    margin-bottom: 0.5rem;
}

.multimodal-company {
    color: var(--primary-color);
    font-weight: 600;
    margin-bottom: 0.75rem;
}

/* Table */
.table-container {
    overflow-x: auto;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

.comparison-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--bg-primary);
}

.comparison-table th,
.comparison-table td {
    padding: 1rem 1.25rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.comparison-table th {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: white;
    font-weight: 600;
}

.comparison-table tbody tr:hover {
    background: var(--bg-tertiary);
}

/* How It Works */
.how-it-works {
    display: grid;
    gap: 1.5rem;
}

.step {
    display: flex;
    gap: 1.5rem;
    align-items: flex-start;
}

.step-number {
    width: 3rem;
    height: 3rem;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.25rem;
    flex-shrink: 0;
}

.step-content {
    flex: 1;
    padding-top: 0.25rem;
}

.step-content h3 {
    margin-bottom: 0.5rem;
}

.step-content p {
    color: var(--text-secondary);
    margin: 0;
}

/* Agents Grid */
.agents-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

.agent-card {
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    padding: 2rem;
    border: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    transition: var(--transition);
}

.agent-card:hover {
    box-shadow: var(--shadow-xl);
    transform: translateY(-3px);
}

.agent-avatar {
    font-size: 4rem;
    text-align: center;
}

.agent-info h3 {
    margin-bottom: 0.25rem;
}

.agent-developer {
    color: var(--primary-color);
    font-weight: 600;
    margin-bottom: 1rem;
}

.agent-description {
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.agent-capabilities {
    background: var(--bg-tertiary);
    padding: 1rem;
    border-radius: var(--radius-md);
    margin: 1rem 0;
}

.agent-capabilities h4 {
    margin-bottom: 0.75rem;
    font-size: 0.875rem;
}

.agent-capabilities ul {
    list-style: none;
    margin: 0;
}

.agent-capabilities li {
    position: relative;
    padding-left: 1.25rem;
    margin-bottom: 0.5rem;
    font-size: 0.875rem;
}

.agent-capabilities li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--success-color);
    font-weight: 700;
}

.agent-impact {
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.1) 0%, rgba(6, 182, 212, 0.1) 100%);
    padding: 1rem;
    border-radius: var(--radius-md);
    border-left: 4px solid var(--primary-color);
    margin: 0;
    font-size: 0.9375rem;
}

/* Agent Types */
.agent-types {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
}

.type-card {
    background: var(--bg-primary);
    padding: 1.5rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
}

.type-card h3 {
    margin-bottom: 0.75rem;
    font-size: 1.125rem;
}

.type-card p {
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.type-example {
    background: var(--bg-tertiary);
    padding: 0.75rem;
    border-radius: var(--radius-md);
    margin: 0;
    font-size: 0.875rem;
}

/* Architecture Diagram */
.architecture-diagram {
    max-width: 600px;
    margin: 0 auto;
    text-align: center;
}

.arch-layer {
    background: var(--bg-primary);
    padding: 1.25rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    border: 2px solid var(--primary-color);
}

.arch-label {
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.arch-components {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.arch-arrow {
    font-size: 1.5rem;
    color: var(--primary-color);
    padding: 0.5rem 0;
}

/* Future Grid */
.future-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.future-card {
    background: var(--bg-primary);
    padding: 1.5rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.future-card:hover {
    border-color: var(--primary-color);
}

.future-card h3 {
    margin-bottom: 0.75rem;
}

.future-card p {
    color: var(--text-secondary);
    margin: 0;
}

/* Threats Grid */
.threats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 1.5rem;
}

.threat-card {
    background: var(--bg-primary);
    padding: 1.5rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
    border-top: 4px solid var(--danger-color);
}

.threat-icon {
    font-size: 2rem;
    margin-bottom: 1rem;
}

.threat-card h3 {
    margin-bottom: 0.75rem;
}

.threat-card > p {
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.threat-example {
    background: #fef2f2;
    padding: 1rem;
    border-radius: var(--radius-md);
    margin: 1rem 0;
    border-left: 4px solid var(--danger-color);
}

.threat-prevention {
    background: #f0fdf4;
    padding: 1rem;
    border-radius: var(--radius-md);
    border-left: 4px solid var(--success-color);
}

/* Agent Security */
.agent-security {
    display: grid;
    gap: 1.5rem;
}

.security-issue {
    background: var(--bg-primary);
    padding: 1.5rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
}

.security-issue h3 {
    margin-bottom: 0.75rem;
}

.security-issue > p {
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.mitigation {
    background: var(--bg-tertiary);
    padding: 1rem;
    border-radius: var(--radius-md);
    border-left: 4px solid var(--success-color);
}

/* Best Practices */
.best-practices {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.practice-card {
    background: var(--bg-primary);
    padding: 1.5rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.practice-card:hover {
    border-color: var(--primary-color);
    transform: translateY(-3px);
}

.practice-card h3 {
    margin-bottom: 0.75rem;
}

.practice-card p {
    color: var(--text-secondary);
    margin: 0;
}

/* Frameworks */
.frameworks-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}

.framework-card {
    background: var(--bg-primary);
    padding: 1.5rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
}

.framework-card h3 {
    margin-bottom: 0.25rem;
}

.framework-by {
    color: var(--primary-color);
    font-weight: 600;
    margin-bottom: 0.75rem;
}

.framework-card > p {
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.framework-card > p:last-child {
    background: var(--bg-tertiary);
    padding: 0.75rem;
    border-radius: var(--radius-md);
    margin: 0;
    font-size: 0.875rem;
}

/* Tech Grid */
.tech-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.tech-card {
    background: var(--bg-primary);
    padding: 1.5rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
}

.tech-card h3 {
    margin-bottom: 0.75rem;
}

.tech-card p {
    color: var(--text-secondary);
    margin: 0;
}

/* Regulations */
.regulations {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
}

.regulation-card {
    background: var(--bg-primary);
    padding: 1.5rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
}

.regulation-card h3 {
    margin-bottom: 0.25rem;
}

.regulation-card > p:first-of-type {
    color: var(--primary-color);
    font-weight: 600;
    margin-bottom: 1rem;
}

.regulation-card > p:not(:first-of-type) {
    background: var(--bg-tertiary);
    padding: 0.75rem;
    border-radius: var(--radius-md);
    margin: 0.75rem 0 0;
    font-size: 0.875rem;
}

/* Mobile Responsive */
@media (max-width: 768px) {
    .nav-toggle {
        display: flex;
    }

    .nav-menu {
        position: absolute;
        top: 70px;
        left: 0;
        right: 0;
        background: var(--bg-primary);
        flex-direction: column;
        padding: 1rem;
        box-shadow: var(--shadow-lg);
        display: none;
    }

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

    .nav-link {
        padding: 0.75rem 1rem;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

    .stat-number {
        font-size: 2.5rem;
    }

    .section {
        padding: 3rem 0;
    }

    .page-header {
        padding: 120px 0 3rem;
    }

    .page-header h1 {
        font-size: 2rem;
    }

    .timeline {
        padding-left: 1rem;
    }

    .timeline::before {
        left: 0;
    }

    .timeline-marker {
        left: -1.25rem;
        width: 2.5rem;
        height: 2.5rem;
        font-size: 0.75rem;
    }

    .timeline-item {
        padding-left: 1rem;
    }

    .step {
        flex-direction: column;
        gap: 1rem;
    }

    .step-number {
        width: 2.5rem;
        height: 2.5rem;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }

    .btn {
        width: 100%;
        max-width: 300px;
    }

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

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

    .comparison-table th,
    .comparison-table td {
        padding: 0.75rem;
        font-size: 0.875rem;
    }
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    animation: fadeIn 0.6s ease-out forwards;
}

.delay-1 { animation-delay: 0.1s; }
.delay-2 { animation-delay: 0.2s; }
.delay-3 { animation-delay: 0.3s; }
.delay-4 { animation-delay: 0.4s; }