/* ===========================
   Global Styles & Reset
   =========================== */

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

:root {
    /* Colors */
    --primary-color: #667eea;
    --secondary-color: #764ba2;
    --accent-color: #f093fb;
    --success-color: #43e97b;
    --warning-color: #feca57;
    --danger-color: #ff6b6b;
    --dark-bg: #1a1a2e;
    --darker-bg: #0f0f1e;
    --light-bg: #f8f9fa;
    --white: #ffffff;
    --text-primary: #2d3748;
    --text-secondary: #4a5568;
    --text-light: #718096;
    --border-color: #e2e8f0;
    --card-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --card-shadow-hover: 0 10px 20px rgba(0, 0, 0, 0.15);

    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-secondary: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --gradient-success: linear-gradient(135deg, #43e97b 0%, #38f9d7 100%);
    --gradient-dark: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);

    /* Typography */
    --font-primary: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-mono: 'SF Mono', Monaco, 'Cascadia Code', 'Roboto Mono', Consolas, 'Courier New', monospace;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-xxl: 4rem;

    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;

    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
}

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

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* ===========================
   Navigation
   =========================== */

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    z-index: 1000;
    padding: var(--spacing-sm) 0;
}

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

.nav-brand {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.logo {
    font-size: 2rem;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-lg);
    align-items: center;
}

.nav-link {
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    transition: color var(--transition-fast);
    position: relative;
}

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

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

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

.nav-link.active {
    color: var(--primary-color);
    font-weight: 600;
}

.hamburger {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-xs);
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: var(--primary-color);
    border-radius: 3px;
    transition: all var(--transition-base);
}

/* Scroll Progress Bar */
.progress-container {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: rgba(0, 0, 0, 0.05);
}

.progress-bar {
    height: 4px;
    background: var(--gradient-primary);
    width: 0%;
    transition: width 0.1s ease;
    box-shadow: 0 0 10px rgba(102, 126, 234, 0.5);
}

/* ===========================
   Hero Section
   =========================== */

.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    color: var(--white);
    text-align: center;
    padding: var(--spacing-xxl) var(--spacing-md);
    margin-top: 70px;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg width="100" height="100" xmlns="http://www.w3.org/2000/svg"><rect width="100" height="100" fill="none"/><circle cx="50" cy="50" r="40" fill="rgba(255,255,255,0.05)"/></svg>');
    opacity: 0.1;
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 900px;
}

.badge {
    display: inline-block;
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: 50px;
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    animation: fadeInDown 0.6s ease;
}

.hero-title {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 800;
    margin-bottom: var(--spacing-md);
    line-height: 1.2;
    animation: fadeInUp 0.6s ease 0.2s both;
}

.hero-subtitle {
    font-size: clamp(1.125rem, 2vw, 1.5rem);
    margin-bottom: var(--spacing-xl);
    opacity: 0.95;
    animation: fadeInUp 0.6s ease 0.4s both;
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: var(--spacing-xl);
    animation: fadeInUp 0.6s ease 0.6s both;
}

.tech-badges {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
    flex-wrap: wrap;
    animation: fadeInUp 0.6s ease 0.8s both;
}

.tech-badge {
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(10px);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: 50px;
    font-size: 0.875rem;
    font-weight: 500;
}

/* ===========================
   Buttons
   =========================== */

.btn {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-md);
    font-weight: 600;
    text-decoration: none;
    transition: all var(--transition-base);
    cursor: pointer;
    border: none;
    font-size: 1rem;
}

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

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
}

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

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

.btn-large {
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: 1.125rem;
}

/* ===========================
   Sections
   =========================== */

.section {
    padding: var(--spacing-xxl) var(--spacing-md);
}

.section-dark {
    background: var(--gradient-dark);
    color: var(--white);
}

.section-title {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    text-align: center;
    margin-bottom: var(--spacing-xl);
    position: relative;
}

.section-title::after {
    content: '';
    display: block;
    width: 80px;
    height: 4px;
    background: var(--gradient-primary);
    margin: var(--spacing-md) auto 0;
    border-radius: 2px;
}

.section-dark .section-title::after {
    background: var(--gradient-success);
}

/* ===========================
   Overview Section
   =========================== */

.overview-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xxl);
}

.overview-card {
    background: var(--white);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: var(--card-shadow);
    transition: all var(--transition-base);
    border: 1px solid var(--border-color);
}

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

.card-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
}

.overview-card h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
    color: var(--primary-color);
}

.overview-card p {
    color: var(--text-secondary);
    line-height: 1.7;
}

/* Diagram Container */
.diagram-container {
    background: var(--white);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--card-shadow);
    margin: var(--spacing-xxl) 0;
}

.diagram-title {
    font-size: 1.75rem;
    font-weight: 600;
    margin-bottom: var(--spacing-lg);
    text-align: center;
    color: var(--primary-color);
}

.mermaid {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 300px;
}

.mermaid svg {
    max-width: 100%;
    height: auto;
}

.mermaid svg .flowchart-link,
.mermaid svg .edgePath path {
    stroke: #1f2937;
    stroke-width: 2.5px;
}

.mermaid svg marker path {
    fill: #1f2937;
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xxl);
}

.stat-item {
    text-align: center;
    padding: var(--spacing-lg);
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1) 0%, rgba(118, 75, 162, 0.1) 100%);
    border-radius: var(--radius-lg);
    border: 2px solid var(--primary-color);
}

.stat-number {
    font-size: 3rem;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: 1rem;
    color: var(--text-secondary);
    font-weight: 600;
}

/* ===========================
   Features Section
   =========================== */

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-lg);
}

.feature-card {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: all var(--transition-base);
}

.feature-card:hover {
    background: rgba(255, 255, 255, 0.08);
    transform: translateY(-5px);
}

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-md);
}

.feature-card h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-md);
    color: var(--white);
}

.feature-list {
    list-style: none;
    padding-left: 0;
}

.feature-list li {
    padding: var(--spacing-xs) 0;
    color: rgba(255, 255, 255, 0.85);
    position: relative;
    padding-left: var(--spacing-md);
}

.feature-list li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--success-color);
    font-weight: bold;
}

/* ===========================
   Architecture Section
   =========================== */

.architecture-description {
    text-align: center;
    max-width: 800px;
    margin: 0 auto var(--spacing-xxl);
    font-size: 1.125rem;
    color: var(--text-secondary);
    line-height: 1.8;
}

.architecture-layers {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-xl);
}

.layer-card {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1) 0%, rgba(118, 75, 162, 0.1) 100%);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    text-align: center;
    border: 2px solid var(--primary-color);
}

.layer-card h3 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-xs);
    color: var(--primary-color);
}

.layer-card p {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.design-patterns {
    margin-top: var(--spacing-xxl);
    padding: var(--spacing-xl);
    background: var(--light-bg);
    border-radius: var(--radius-lg);
}

.design-patterns h3 {
    font-size: 1.75rem;
    margin-bottom: var(--spacing-lg);
    text-align: center;
    color: var(--primary-color);
}

.patterns-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
}

.pattern-item {
    padding: var(--spacing-md);
    background: var(--white);
    border-radius: var(--radius-md);
    border-left: 4px solid var(--primary-color);
}

.pattern-item strong {
    display: block;
    color: var(--primary-color);
    margin-bottom: var(--spacing-xs);
    font-size: 1.125rem;
}

.pattern-item p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* ===========================
   Quick Start Section
   =========================== */

.quick-start-steps {
    max-width: 900px;
    margin: 0 auto var(--spacing-xxl);
}

.step {
    display: flex;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
    align-items: flex-start;
}

.step-number {
    flex-shrink: 0;
    width: 60px;
    height: 60px;
    background: var(--gradient-primary);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
}

.step-content {
    flex: 1;
}

.step-content h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
    color: var(--white);
}

.prerequisites,
.example-usage {
    background: rgba(255, 255, 255, 0.05);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    margin-top: var(--spacing-xl);
}

.prerequisites h3,
.example-usage h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-md);
    color: var(--white);
}

.prerequisites ul {
    list-style: none;
    padding-left: 0;
}

.prerequisites li {
    padding: var(--spacing-xs) 0;
    color: rgba(255, 255, 255, 0.85);
    position: relative;
    padding-left: var(--spacing-md);
}

.prerequisites li::before {
    content: '▸';
    position: absolute;
    left: 0;
    color: var(--success-color);
}

/* Code Blocks */
pre {
    background: var(--darker-bg);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    overflow-x: auto;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

code {
    font-family: var(--font-mono);
    font-size: 0.9rem;
    color: #a8dadc;
}

/* ===========================
   Workflows Section
   =========================== */

.workflow-table {
    overflow-x: auto;
    margin-bottom: var(--spacing-xxl);
}

table {
    width: 100%;
    border-collapse: collapse;
    background: var(--white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--card-shadow);
}

thead {
    background: var(--gradient-primary);
    color: var(--white);
}

th, td {
    padding: var(--spacing-md);
    text-align: left;
}

tbody tr {
    border-bottom: 1px solid var(--border-color);
    transition: background var(--transition-fast);
}

tbody tr:hover {
    background: rgba(102, 126, 234, 0.05);
}

tbody tr:last-child {
    border-bottom: none;
}

.custom-workflow {
    background: var(--light-bg);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    margin-top: var(--spacing-xl);
}

.custom-workflow h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-md);
    color: var(--primary-color);
}

.custom-workflow p {
    margin-bottom: var(--spacing-md);
    color: var(--text-secondary);
}

/* ===========================
   Documentation Section
   =========================== */

.docs-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xxl);
}

.doc-card {
    background: rgba(255, 255, 255, 0.05);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    text-decoration: none;
    color: var(--white);
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: all var(--transition-base);
    display: block;
}

.doc-card:hover {
    background: rgba(255, 255, 255, 0.08);
    transform: translateY(-5px);
    border-color: var(--success-color);
}

.doc-icon {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-md);
}

.doc-card h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
    color: var(--white);
}

.doc-card p {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.95rem;
}

.tech-stack {
    margin-top: var(--spacing-xxl);
}

.tech-stack h3 {
    font-size: 1.75rem;
    margin-bottom: var(--spacing-lg);
    text-align: center;
    color: var(--white);
}

.tech-categories {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-lg);
}

.tech-category {
    background: rgba(255, 255, 255, 0.05);
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
}

.tech-category h4 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-md);
    color: var(--success-color);
}

.tech-category ul {
    list-style: none;
    padding-left: 0;
}

.tech-category li {
    padding: var(--spacing-xs) 0;
    color: rgba(255, 255, 255, 0.8);
}

/* ===========================
   Community Section
   =========================== */

.community-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xxl);
}

.community-card {
    background: var(--white);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: var(--card-shadow);
    transition: all var(--transition-base);
    text-align: center;
}

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

.community-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
}

.community-card h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
    color: var(--primary-color);
}

.community-card p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
}

.community-link {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
    transition: color var(--transition-fast);
}

.community-link:hover {
    color: var(--secondary-color);
}

.contribution-steps {
    background: var(--light-bg);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-xl);
}

.contribution-steps h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-md);
    color: var(--primary-color);
}

.contribution-steps ol {
    padding-left: var(--spacing-lg);
}

.contribution-steps li {
    padding: var(--spacing-xs) 0;
    color: var(--text-secondary);
}

.acknowledgments {
    text-align: center;
}

.acknowledgments h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-md);
    color: var(--primary-color);
}

.tools-list {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    justify-content: center;
}

.tools-list span {
    background: var(--gradient-primary);
    color: var(--white);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: 50px;
    font-size: 0.875rem;
    font-weight: 500;
}

/* ===========================
   Demo Section
   =========================== */

.demo-container {
    max-width: 1000px;
    margin: 0 auto;
}

.demo-tabs {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
    justify-content: center;
    flex-wrap: wrap;
}

.demo-tab {
    padding: var(--spacing-sm) var(--spacing-lg);
    background: rgba(255, 255, 255, 0.1);
    color: var(--white);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-base);
    font-size: 1rem;
    font-weight: 500;
}

.demo-tab:hover {
    background: rgba(255, 255, 255, 0.15);
}

.demo-tab.active {
    background: var(--white);
    color: var(--primary-color);
    border-color: var(--white);
}

.demo-content {
    background: rgba(255, 255, 255, 0.05);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
}

.demo-panel {
    display: none;
}

.demo-panel.active {
    display: block;
    animation: fadeIn 0.3s ease;
}

.demo-panel h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-md);
    color: var(--white);
}

.demo-panel ul {
    list-style: none;
    padding-left: 0;
    margin: var(--spacing-md) 0;
}

.demo-panel li {
    padding: var(--spacing-xs) 0;
    color: rgba(255, 255, 255, 0.85);
    position: relative;
    padding-left: var(--spacing-md);
}

.demo-panel li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--success-color);
    font-size: 1.5rem;
    line-height: 1;
}

.ui-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.ui-feature {
    background: rgba(255, 255, 255, 0.05);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    border-left: 3px solid var(--success-color);
}

.ui-feature strong {
    display: block;
    color: var(--white);
    margin-bottom: var(--spacing-xs);
}

.ui-feature p {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.9rem;
}

/* ===========================
   CTA Section
   =========================== */

.cta-section {
    background: var(--gradient-primary);
    color: var(--white);
    text-align: center;
    padding: var(--spacing-xxl) var(--spacing-md);
}

.cta-section h2 {
    font-size: clamp(2rem, 4vw, 3rem);
    margin-bottom: var(--spacing-md);
}

.cta-section p {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-xl);
    opacity: 0.95;
}

.cta-buttons {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
}

/* ===========================
   Footer
   =========================== */

.footer {
    background: var(--darker-bg);
    color: rgba(255, 255, 255, 0.8);
    padding: var(--spacing-xxl) var(--spacing-md) var(--spacing-lg);
}

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

.footer-section h4 {
    color: var(--white);
    margin-bottom: var(--spacing-md);
    font-size: 1.125rem;
}

.footer-section ul {
    list-style: none;
    padding-left: 0;
}

.footer-section li {
    padding: var(--spacing-xs) 0;
}

.footer-section a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: color var(--transition-fast);
}

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

.footer-version {
    margin-top: var(--spacing-sm);
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.5);
}

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

.footer-bottom p {
    margin: var(--spacing-xs) 0;
    font-size: 0.9rem;
}

/* ===========================
   Animations
   =========================== */

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

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

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

/* ===========================
   Responsive Design
   =========================== */

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 100%;
        background: var(--white);
        flex-direction: column;
        padding: var(--spacing-lg);
        box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
        transition: left var(--transition-base);
        align-items: flex-start;
    }

    .nav-menu.active {
        left: 0;
    }

    .nav-link::after {
        bottom: 0;
        left: -10px;
        width: 3px;
        height: 0;
    }

    .nav-link:hover::after,
    .nav-link.active::after {
        width: 3px;
        height: 100%;
    }

    .hamburger {
        display: flex;
    }

    .hero {
        min-height: 80vh;
        padding: var(--spacing-xl) var(--spacing-md);
    }

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

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

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

    .overview-grid,
    .features-grid,
    .architecture-layers {
        grid-template-columns: 1fr;
    }

    .step {
        flex-direction: column;
    }

    .demo-tabs {
        flex-direction: column;
    }

    .demo-tab {
        width: 100%;
    }

    table {
        font-size: 0.875rem;
    }

    th, td {
        padding: var(--spacing-xs);
    }
}

@media (max-width: 480px) {
    :root {
        font-size: 14px;
    }

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

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

/* ===========================
   Print Styles
   =========================== */

@media print {
    .navbar,
    .hero-buttons,
    .cta-section,
    .footer {
        display: none;
    }

    body {
        font-size: 12pt;
    }

    .section {
        page-break-inside: avoid;
    }
}