/* ===================================
   WorldMind Website Styles
   =================================== */

/* CSS Variables */
:root {
    /* Colors */
    --color-primary: #6366f1;
    --color-primary-dark: #4f46e5;
    --color-secondary: #8b5cf6;
    --color-accent: #06b6d4;
    --color-success: #10b981;
    --color-warning: #f59e0b;
    --color-danger: #ef4444;
    
    --color-bg-primary: #0a0a0f;
    --color-bg-secondary: #13131a;
    --color-bg-tertiary: #1a1a24;
    --color-surface: #1e1e2e;
    
    --color-text-primary: #ffffff;
    --color-text-secondary: #a1a1aa;
    --color-text-tertiary: #71717a;
    
    --color-border: rgba(255, 255, 255, 0.1);
    --color-border-hover: rgba(255, 255, 255, 0.2);
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
    --gradient-secondary: linear-gradient(135deg, #06b6d4 0%, #10b981 100%);
    --gradient-hero: linear-gradient(180deg, rgba(10, 10, 15, 0) 0%, rgba(10, 10, 15, 0.8) 100%);
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    
    /* Typography */
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-mono: 'SF Mono', Monaco, 'Cascadia Code', 'Roboto Mono', monospace;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 350ms ease;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    --shadow-glow: 0 0 30px rgba(99, 102, 241, 0.3);
}

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

html {
    scroll-behavior: smooth;
    overflow-x: hidden;
}

body {
    font-family: var(--font-family);
    background-color: var(--color-bg-primary);
    color: var(--color-text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

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

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

/* Container */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(10, 10, 15, 0.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-border);
    transition: all var(--transition-base);
}

.nav-container {
    max-width: 1600px;
    margin: 0 auto;
    padding: 1.25rem var(--spacing-md);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-weight: 700;
    font-size: 1.25rem;
    transition: all var(--transition-base);
}

.logo:hover {
    opacity: 0.8;
}

.logo-icon {
    width: 40px;
    height: 40px;
    background: var(--gradient-primary);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 1rem;
    box-shadow: var(--shadow-glow);
}

.logo-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-links {
    display: flex;
    gap: 2.5rem;
}

.nav-link {
    position: relative;
    font-size: 0.875rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: var(--color-text-secondary);
    transition: all var(--transition-base);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -0.5rem;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: width var(--transition-base);
}

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

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

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 0.375rem;
    padding: 0.5rem;
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--color-text-primary);
    transition: all var(--transition-base);
}

/* Hero Sections */
.hero,
.tech-hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    padding: var(--spacing-xl) var(--spacing-md);
}

.hero-background {
    position: absolute;
    inset: 0;
    z-index: 0;
}

.hero-gradient {
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 30% 50%, rgba(99, 102, 241, 0.15) 0%, transparent 50%),
                radial-gradient(circle at 70% 50%, rgba(139, 92, 246, 0.15) 0%, transparent 50%),
                var(--gradient-hero);
}

.gradient-tech {
    background: radial-gradient(circle at 50% 30%, rgba(6, 182, 212, 0.15) 0%, transparent 50%),
                radial-gradient(circle at 80% 60%, rgba(16, 185, 129, 0.15) 0%, transparent 50%),
                var(--gradient-hero);
}

.particle-field {
    position: absolute;
    width: 100%;
    height: 100%;
    background-image: 
        radial-gradient(2px 2px at 20% 30%, rgba(255, 255, 255, 0.1), transparent),
        radial-gradient(2px 2px at 60% 70%, rgba(255, 255, 255, 0.1), transparent),
        radial-gradient(1px 1px at 50% 50%, rgba(255, 255, 255, 0.1), transparent),
        radial-gradient(1px 1px at 80% 10%, rgba(255, 255, 255, 0.1), transparent);
    background-size: 200px 200px, 300px 300px, 250px 250px, 180px 180px;
    background-position: 0 0, 40px 60px, 130px 270px, 70px 100px;
    animation: particleFloat 20s linear infinite;
}

@keyframes particleFloat {
    to {
        background-position: 200px 200px, 240px 260px, 330px 470px, 270px 300px;
    }
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 1000px;
    text-align: center;
}

.hero-tag {
    display: inline-block;
    padding: 0.5rem 1rem;
    background: rgba(99, 102, 241, 0.1);
    border: 1px solid rgba(99, 102, 241, 0.3);
    border-radius: 2rem;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
}

.hero-title {
    font-size: clamp(2.5rem, 8vw, 6rem);
    font-weight: 900;
    line-height: 1.1;
    margin-bottom: var(--spacing-md);
    background: linear-gradient(135deg, #ffffff 0%, #a1a1aa 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: clamp(1rem, 2vw, 1.5rem);
    color: var(--color-text-secondary);
    max-width: 800px;
    margin: 0 auto var(--spacing-lg);
    line-height: 1.8;
}

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

.scroll-indicator {
    position: absolute;
    bottom: var(--spacing-lg);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    color: var(--color-text-tertiary);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    animation: bounce 2s infinite;
}

.mouse {
    width: 24px;
    height: 40px;
    border: 2px solid var(--color-border);
    border-radius: 12px;
    position: relative;
}

.wheel {
    width: 4px;
    height: 8px;
    background: var(--color-text-tertiary);
    border-radius: 2px;
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    animation: scroll 1.5s infinite;
}

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

@keyframes scroll {
    0% { opacity: 1; transform: translateX(-50%) translateY(0); }
    100% { opacity: 0; transform: translateX(-50%) translateY(16px); }
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 2rem;
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 0.9375rem;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    inset: 0;
    background: rgba(255, 255, 255, 0.1);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.btn:hover::before {
    opacity: 1;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: 0 4px 16px rgba(99, 102, 241, 0.4);
}

.btn-primary:hover {
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.6);
    transform: translateY(-2px);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--color-border);
    color: var(--color-text-primary);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--color-border-hover);
    transform: translateY(-2px);
}

/* Section Styles */
section {
    padding: var(--spacing-xl) 0;
    position: relative;
}

.section-header {
    margin-bottom: var(--spacing-lg);
}

.section-header.centered {
    text-align: center;
}

.section-tag {
    display: inline-block;
    padding: 0.375rem 0.875rem;
    background: rgba(99, 102, 241, 0.1);
    border: 1px solid rgba(99, 102, 241, 0.3);
    border-radius: 1.5rem;
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
}

.section-title {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: var(--spacing-sm);
}

.section-description {
    font-size: 1.125rem;
    color: var(--color-text-secondary);
    max-width: 700px;
    margin: 0 auto;
}

/* Demo Showcase Section */
.demos-section {
    background: var(--color-bg-secondary);
    padding: var(--spacing-xl) 0;
}

.demo-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
    align-items: start;
}

/* Layout for 7 videos: first spans full width */
.demo-grid.layout-7 {
    grid-template-columns: repeat(3, 1fr);
    grid-auto-rows: auto;
}

.demo-grid.layout-7 .demo-item:first-child {
    grid-column: 1 / -1;
}

/* Layout for 9 videos: first row full width, then 4 rows with 2 videos each */
.demo-grid.layout-9 {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
}

/* First video - large (spans full width) */
.demo-grid.layout-9 .demo-item:first-child {
    grid-column: 1 / -1;
}

/* Remaining 8 videos automatically flow in 2-column layout */
.demo-grid.layout-9 .demo-item:nth-child(2),
.demo-grid.layout-9 .demo-item:nth-child(3),
.demo-grid.layout-9 .demo-item:nth-child(4),
.demo-grid.layout-9 .demo-item:nth-child(5),
.demo-grid.layout-9 .demo-item:nth-child(6),
.demo-grid.layout-9 .demo-item:nth-child(7),
.demo-grid.layout-9 .demo-item:nth-child(8),
.demo-grid.layout-9 .demo-item:nth-child(9) {
    grid-column: span 1;
}

.demo-item {
    position: relative;
    overflow: hidden;
    border-radius: var(--radius-lg);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    transition: all var(--transition-base);
}

.demo-item:hover {
    border-color: var(--color-primary);
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl), var(--shadow-glow);
}

.demo-item video {
    display: block;
    width: 100%;
    height: auto;
    object-fit: contain;
    border-radius: var(--radius-md);
}

.loading-text {
    grid-column: 1 / -1;
    text-align: center;
    color: var(--color-text-secondary);
    padding: var(--spacing-xl);
}

@media (max-width: 1024px) {
    .demo-grid,
    .demo-grid.layout-7 {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .demo-grid.layout-9 {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .demo-grid.layout-9 .demo-item:first-child {
        grid-column: 1 / -1;
    }
}

@media (max-width: 768px) {
    .demo-grid,
    .demo-grid.layout-7,
    .demo-grid.layout-9 {
        grid-template-columns: 1fr;
    }
    
    .demo-grid.layout-9 .demo-item:first-child {
        grid-column: 1;
    }
}

/* Mission Section */
.mission-section {
    background: var(--color-bg-primary);
}

.mission-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.mission-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    transition: all var(--transition-base);
}

.mission-card:hover {
    border-color: var(--color-primary);
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl), var(--shadow-glow);
}

.mission-icon {
    width: 64px;
    height: 64px;
    background: var(--gradient-primary);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-md);
}

.mission-icon svg {
    width: 32px;
    height: 32px;
    color: white;
}

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

.mission-card p {
    color: var(--color-text-secondary);
    line-height: 1.8;
}

/* Technology Showcase */
.tech-showcase {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    align-items: center;
    padding: var(--spacing-xl) var(--spacing-md);
}

.tech-visual {
    position: relative;
    height: 600px;
}

.tech-visual-content {
    position: absolute;
    inset: 0;
    background: radial-gradient(circle, rgba(99, 102, 241, 0.1) 0%, transparent 70%);
    border-radius: var(--radius-xl);
    border: 1px solid var(--color-border);
}

.neural-network {
    width: 100%;
    height: 100%;
    background-image: 
        radial-gradient(circle, rgba(99, 102, 241, 0.4) 2px, transparent 2px),
        radial-gradient(circle, rgba(139, 92, 246, 0.4) 2px, transparent 2px);
    background-size: 50px 50px, 80px 80px;
    background-position: 0 0, 40px 40px;
    animation: networkPulse 3s ease-in-out infinite;
}

@keyframes networkPulse {
    0%, 100% { opacity: 0.3; }
    50% { opacity: 0.6; }
}

.tech-content {
    padding: var(--spacing-md);
}

.tech-description {
    font-size: 1.125rem;
    color: var(--color-text-secondary);
    line-height: 1.8;
    margin-bottom: var(--spacing-lg);
}

.tech-features {
    list-style: none;
    margin-bottom: var(--spacing-lg);
}

.tech-features li {
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-sm);
    transition: all var(--transition-base);
}

.tech-features li:hover {
    border-color: var(--color-primary);
    transform: translateX(8px);
}

.feature-number {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 1.125rem;
}

.feature-content h4 {
    font-size: 1.125rem;
    margin-bottom: 0.25rem;
}

.feature-content p {
    color: var(--color-text-secondary);
    font-size: 0.9375rem;
}

.tech-cta-wrapper {
    margin-top: var(--spacing-lg);
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.tech-note {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    font-style: italic;
    margin: 0;
    padding-left: 0.5rem;
    border-left: 2px solid var(--color-primary);
}

/* Vision Section */
.vision-section {
    background: var(--color-bg-secondary);
}

.vision-grid {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: var(--spacing-xl);
    align-items: center;
}

.vision-text p {
    font-size: 1.125rem;
    color: var(--color-text-secondary);
    line-height: 1.8;
    margin-bottom: var(--spacing-md);
}

.vision-stats {
    display: grid;
    grid-template-columns: repeat(2, minmax(280px, 1fr));
    gap: var(--spacing-md);
}

.stat-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg) var(--spacing-md);
    text-align: center;
    transition: all var(--transition-base);
    min-width: 0;
}

.stat-card:hover {
    border-color: var(--color-primary);
    transform: scale(1.05);
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 900;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.5rem;
    white-space: nowrap;
}

.stat-label {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    line-height: 1.4;
}

/* Values Section */
.values-list {
    max-width: 1000px;
    margin: 0 auto;
}

.value-item {
    display: flex;
    gap: var(--spacing-lg);
    padding: var(--spacing-lg);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-md);
    transition: all var(--transition-base);
}

.value-item:hover {
    border-color: var(--color-primary);
    transform: translateX(8px);
}

.value-number {
    flex-shrink: 0;
    width: 64px;
    height: 64px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 900;
    font-size: 1.5rem;
}

.value-content h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.value-content p {
    color: var(--color-text-secondary);
    line-height: 1.8;
}

/* Team Section */
.team-section {
    background: var(--color-bg-secondary);
}

.team-highlights {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.highlight-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    text-align: center;
}

.highlight-card h4 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
    color: var(--color-primary);
}

.highlight-card p {
    color: var(--color-text-secondary);
    line-height: 1.8;
}

/* Architecture Section */
.architecture-flow {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
    margin: var(--spacing-xl) 0;
    flex-wrap: wrap;
}

.arch-component {
    flex: 1;
    min-width: 250px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    transition: all var(--transition-base);
}

.arch-component:hover {
    border-color: var(--color-primary);
    transform: translateY(-4px);
}

.arch-component.highlight {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-glow);
}

.arch-icon {
    width: 64px;
    height: 64px;
    background: var(--gradient-primary);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-md);
}

.arch-icon svg {
    width: 32px;
    height: 32px;
    color: white;
}

.arch-component h3 {
    font-size: 1.25rem;
    text-align: center;
    margin-bottom: var(--spacing-sm);
}

.arch-component p {
    color: var(--color-text-secondary);
    text-align: center;
    margin-bottom: var(--spacing-md);
    line-height: 1.6;
}

.component-specs {
    list-style: none;
    font-size: 0.875rem;
    color: var(--color-text-tertiary);
}

.component-specs li {
    padding: 0.375rem 0;
    border-top: 1px solid var(--color-border);
}

.component-specs li:first-child {
    border-top: none;
}

.arch-arrow {
    font-size: 2rem;
    color: var(--color-primary);
    font-weight: 300;
}

.architecture-details {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.detail-card {
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
}

.detail-card h4 {
    font-size: 1.125rem;
    margin-bottom: 0.5rem;
}

.detail-card p {
    color: var(--color-text-secondary);
    font-size: 0.9375rem;
    line-height: 1.6;
}

/* Capabilities Section */
.capabilities-section {
    background: var(--color-bg-secondary);
}

.capabilities-grid {
    display: grid;
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
}

.capability-card {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: var(--spacing-lg);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    transition: all var(--transition-base);
}

.capability-card:hover {
    border-color: var(--color-primary);
    transform: scale(1.02);
}

.capability-visual {
    border-radius: var(--radius-md);
    overflow: hidden;
}

.visual-placeholder {
    width: 100%;
    height: 100%;
    min-height: 200px;
}

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

.capability-content p {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
    line-height: 1.8;
}

.capability-content ul {
    list-style: none;
}

.capability-content ul li {
    padding: 0.5rem 0;
    padding-left: 1.5rem;
    position: relative;
    color: var(--color-text-secondary);
}

.capability-content ul li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--color-primary);
}

/* Metrics Section */
.metrics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

.metric-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    text-align: center;
    transition: all var(--transition-base);
}

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

.metric-value {
    font-size: 3rem;
    font-weight: 900;
    background: var(--gradient-secondary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.5rem;
}

.metric-label {
    font-size: 1rem;
    color: var(--color-text-secondary);
    margin-bottom: 0.5rem;
}

.metric-comparison {
    font-size: 0.875rem;
    color: var(--color-success);
    font-weight: 600;
}

.benchmark-details {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
}

.benchmark-details h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-md);
}

.task-list {
    display: grid;
    gap: var(--spacing-sm);
}

.task-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-sm);
    background: var(--color-bg-secondary);
    border-radius: var(--radius-sm);
}

.task-icon {
    color: var(--color-success);
    font-size: 1.25rem;
}

.task-name {
    flex: 1;
    color: var(--color-text-secondary);
}

.task-score {
    font-weight: 700;
    color: var(--color-text-primary);
}

/* Research Section */
.research-content {
    max-width: 1000px;
    margin: 0 auto;
}

.research-paper {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.paper-header h3 {
    font-size: 1.75rem;
    line-height: 1.4;
    margin-bottom: var(--spacing-md);
}

.paper-meta {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
    font-size: 0.9375rem;
    color: var(--color-text-tertiary);
    margin-bottom: var(--spacing-md);
}

.paper-venue {
    color: var(--color-primary);
    font-weight: 600;
}

.paper-abstract {
    padding: var(--spacing-md);
    background: var(--color-bg-secondary);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-md);
}

.paper-abstract h4 {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-sm);
}

.paper-abstract p {
    color: var(--color-text-secondary);
    line-height: 1.8;
}

.paper-actions {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

.contribution-list {
    display: grid;
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.contribution-item {
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
}

.contribution-number {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    background: var(--gradient-secondary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 1.25rem;
}

.contribution-content h4 {
    font-size: 1.125rem;
    margin-bottom: 0.25rem;
}

.contribution-content p {
    color: var(--color-text-secondary);
    font-size: 0.9375rem;
}

/* Applications Section */
.applications-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.app-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    text-align: center;
    transition: all var(--transition-base);
}

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

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

.app-card h3 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
}

.app-card p {
    color: var(--color-text-secondary);
    line-height: 1.6;
}

/* Introduction Section */
.intro-section {
    padding: var(--spacing-xl) 0;
}

.intro-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    align-items: center;
}

.intro-visual {
    position: relative;
    height: 400px;
}

.diagram-container {
    position: relative;
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: space-around;
    padding: var(--spacing-md);
}

.diagram-node {
    background: var(--color-surface);
    border: 2px solid var(--color-primary);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    text-align: center;
    font-weight: 600;
    position: relative;
    animation: pulse 2s ease-in-out infinite;
}

.diagram-node:nth-child(2) { animation-delay: 0.5s; }
.diagram-node:nth-child(4) { animation-delay: 1s; }
.diagram-node:nth-child(6) { animation-delay: 1.5s; }

@keyframes pulse {
    0%, 100% { transform: scale(1); box-shadow: 0 0 0 rgba(99, 102, 241, 0); }
    50% { transform: scale(1.05); box-shadow: 0 0 20px rgba(99, 102, 241, 0.5); }
}

.intro-text h2 {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-md);
}

.intro-text p {
    font-size: 1.125rem;
    color: var(--color-text-secondary);
    line-height: 1.8;
    margin-bottom: var(--spacing-md);
}

/* CTA Section */
.cta-section {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.1) 0%, rgba(139, 92, 246, 0.1) 100%);
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
}

.cta-content {
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.cta-content h2 {
    font-size: clamp(2rem, 5vw, 3rem);
    margin-bottom: var(--spacing-sm);
}

.cta-content p {
    font-size: 1.25rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-lg);
}

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

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

.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 2fr;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-lg);
}

.footer-brand {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.footer-tagline {
    color: var(--color-text-secondary);
    font-size: 0.9375rem;
}

.social-links {
    display: flex;
    gap: var(--spacing-sm);
}

.social-links a {
    width: 40px;
    height: 40px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-base);
}

.social-links a:hover {
    border-color: var(--color-primary);
    background: rgba(99, 102, 241, 0.1);
    transform: translateY(-2px);
}

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

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
}

.footer-column h4 {
    font-size: 0.875rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text-primary);
}

.footer-column a {
    display: block;
    padding: 0.375rem 0;
    color: var(--color-text-secondary);
    font-size: 0.9375rem;
    transition: all var(--transition-base);
}

.footer-column a:hover {
    color: var(--color-text-primary);
    transform: translateX(4px);
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--color-border);
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

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

.footer-legal {
    display: flex;
    gap: var(--spacing-md);
}

.footer-legal a {
    color: var(--color-text-tertiary);
    font-size: 0.875rem;
}

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

/* Additional DualWorld Page Styles */
.system-tagline {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
    margin: var(--spacing-md) 0;
    flex-wrap: wrap;
}

.system-fast,
.system-slow {
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: 0.9375rem;
    font-weight: 600;
}

.system-fast {
    border-color: rgba(6, 182, 212, 0.5);
    color: var(--color-accent);
}

.system-slow {
    border-color: rgba(139, 92, 246, 0.5);
    color: var(--color-secondary);
}

.system-separator {
    font-size: 1.5rem;
    color: var(--color-text-tertiary);
}

.abstract-section,
.performance-section,
.pipeline-section,
.visualizations-section,
.method-section {
    padding: var(--spacing-xl) 0;
}

.abstract-section {
    background: var(--color-bg-secondary);
}

.lead {
    font-size: 1.25rem;
    line-height: 1.8;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-lg);
}

.dual-system-intro {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
    margin: var(--spacing-lg) 0;
}

.fast-system-card {
    border-color: rgba(6, 182, 212, 0.3);
}

.slow-system-card {
    border-color: rgba(139, 92, 246, 0.3);
}

.dual-system-intro h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
}

.dual-system-intro h4 {
    font-size: 1.125rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-sm);
}

.dual-system-intro ul {
    list-style: none;
    margin-top: var(--spacing-sm);
}

.dual-system-intro ul li {
    padding: 0.375rem 0;
    padding-left: 1.5rem;
    position: relative;
    color: var(--color-text-secondary);
}

.dual-system-intro ul li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--color-primary);
}

.key-insight {
    padding: var(--spacing-md);
    background: var(--color-surface);
    border-left: 4px solid var(--color-primary);
    border-radius: var(--radius-sm);
    font-size: 1.0625rem;
    line-height: 1.8;
    margin-top: var(--spacing-lg);
}

.comparison-image-container,
.architecture-diagram-container,
.pipeline-diagram-container {
    margin: var(--spacing-lg) 0;
    text-align: center;
}

.comparison-chart,
.architecture-main-image,
.pipeline-image {
    width: 100%;
    max-width: 100%;
    height: auto;
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-lg);
}

.image-caption,
.video-caption,
.feature-caption {
    margin-top: var(--spacing-sm);
    font-size: 0.9375rem;
    color: var(--color-text-tertiary);
    line-height: 1.6;
}

.architecture-philosophy {
    margin-bottom: var(--spacing-lg);
}

.philosophy-text {
    font-size: 1.0625rem;
    line-height: 1.8;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
}

.fast-header {
    background: linear-gradient(135deg, rgba(6, 182, 212, 0.1) 0%, rgba(6, 182, 212, 0.05) 100%);
    border-bottom: 2px solid rgba(6, 182, 212, 0.3);
}

.slow-header {
    background: linear-gradient(135deg, rgba(139, 92, 246, 0.1) 0%, rgba(139, 92, 246, 0.05) 100%);
    border-bottom: 2px solid rgba(139, 92, 246, 0.3);
}

.system-badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 1rem;
    font-size: 0.75rem;
    font-weight: 600;
    margin-left: var(--spacing-sm);
}

.system-separator-large {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: var(--spacing-md);
}

.separator-icon {
    font-size: 2rem;
}

.separator-text {
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-text-tertiary);
}

.fusion-layer {
    margin-top: var(--spacing-lg);
    padding: var(--spacing-lg);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
}

.fusion-layer h4 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
}

.subsection-title {
    font-size: 1.75rem;
    margin: var(--spacing-lg) 0 var(--spacing-md);
}

.visualization-block {
    margin: var(--spacing-xl) 0;
}

.video-prediction-grid,
.feature-map-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
    margin: var(--spacing-md) 0;
}

.prediction-example video,
.feature-example img {
    width: 100%;
    height: auto;
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
}

.viz-description {
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
    line-height: 1.8;
    margin-top: var(--spacing-md);
}

.method-intro {
    font-size: 1.125rem;
    line-height: 1.8;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-lg);
}

.method-steps {
    display: grid;
    gap: var(--spacing-md);
    margin: var(--spacing-lg) 0;
}

.step-card {
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
}

.step-card:hover {
    border-color: var(--color-primary);
    transform: translateX(8px);
}

.step-number {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 900;
    font-size: 1.25rem;
}

.step-content h4 {
    font-size: 1.125rem;
    margin-bottom: 0.5rem;
}

.step-content p {
    color: var(--color-text-secondary);
    line-height: 1.6;
}

.advantage-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.advantage-card {
    padding: var(--spacing-md);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
}

.advantage-card:hover {
    border-color: var(--color-primary);
    transform: scale(1.02);
}

.advantage-card h4 {
    font-size: 1.125rem;
    margin-bottom: 0.5rem;
}

.advantage-card p {
    color: var(--color-text-secondary);
    line-height: 1.6;
    font-size: 0.9375rem;
}

.training-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.training-card {
    padding: var(--spacing-md);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
}

.training-card h4 {
    font-size: 1rem;
    margin-bottom: var(--spacing-sm);
}

.training-card ul {
    list-style: none;
}

.training-card ul li {
    padding: 0.25rem 0;
    color: var(--color-text-secondary);
    font-size: 0.9375rem;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .tech-showcase,
    .vision-grid,
    .intro-grid,
    .capability-card {
        grid-template-columns: 1fr;
    }
    
    .tech-visual {
        height: 400px;
    }
    
    .arch-arrow {
        transform: rotate(90deg);
    }
    
    .dual-system-intro,
    .video-prediction-grid,
    .feature-map-grid,
    .advantage-grid,
    .training-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .nav-links {
        position: fixed;
        top: 80px;
        left: 0;
        right: 0;
        flex-direction: column;
        background: rgba(10, 10, 15, 0.98);
        backdrop-filter: blur(20px);
        padding: var(--spacing-md);
        gap: var(--spacing-sm);
        transform: translateY(-100%);
        opacity: 0;
        transition: all var(--transition-base);
        pointer-events: none;
    }
    
    .nav-links.active {
        transform: translateY(0);
        opacity: 1;
        pointer-events: all;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .mission-grid,
    .values-list,
    .team-highlights,
    .capabilities-grid,
    .applications-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-links {
        grid-template-columns: 1fr;
    }
    
    .vision-stats {
        grid-template-columns: 1fr 1fr;
    }
    
    .architecture-flow {
        flex-direction: column;
    }
    
    .arch-arrow {
        transform: rotate(90deg);
    }
}

@media (max-width: 480px) {
    :root {
        --spacing-xl: 3rem;
        --spacing-lg: 2rem;
    }
    
    .hero-actions,
    .cta-actions,
    .paper-actions {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
        justify-content: center;
    }
    
    .metrics-grid {
        grid-template-columns: 1fr;
    }
}

/* ===================================
   DualWorld Architecture Animation
   =================================== */

.architecture-content-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: start;
    margin-top: 3rem;
}

.architecture-animation {
    position: sticky;
    top: 100px;
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: 2rem;
    overflow: hidden;
}

.arch-animation-container {
    position: relative;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    grid-template-rows: auto auto auto;
    gap: 1.5rem;
    min-height: 600px;
}

/* Architecture Components */
.arch-component {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.1), rgba(139, 92, 246, 0.1));
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    position: relative;
    overflow: hidden;
    transition: all 0.3s ease;
}

.arch-component:hover {
    border-color: var(--color-primary);
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(99, 102, 241, 0.3);
}

.arch-component::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--gradient-primary);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.arch-component:hover::before {
    opacity: 1;
}

/* Component Headers */
.component-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1rem;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid var(--color-border);
}

.component-icon {
    font-size: 1.5rem;
    animation: pulse-icon 2s ease-in-out infinite;
}

@keyframes pulse-icon {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}

.component-label {
    font-family: var(--font-mono);
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-text-primary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.component-body {
    min-height: 120px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.component-info {
    font-size: 0.75rem;
    color: var(--color-text-secondary);
    font-family: var(--font-mono);
    margin-top: 0.5rem;
}

/* Fast Reasoner - V-JEPA */
.fast-reasoner {
    grid-column: 1 / 2;
    grid-row: 1;
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.15), rgba(6, 182, 212, 0.1));
}

.frame-sequence {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0.5rem;
}

.frame-item {
    aspect-ratio: 1;
    background: var(--gradient-primary);
    border-radius: var(--radius-sm);
    animation: frame-pulse 2s ease-in-out infinite;
    opacity: 0.3;
}

@keyframes frame-pulse {
    0%, 100% { 
        opacity: 0.3; 
        transform: scale(0.95);
    }
    50% { 
        opacity: 1; 
        transform: scale(1);
        box-shadow: 0 0 20px rgba(99, 102, 241, 0.5);
    }
}

/* VGGT Spatial Forcing */
.vggt-module {
    grid-column: 2 / 3;
    grid-row: 1;
    background: linear-gradient(135deg, rgba(6, 182, 212, 0.15), rgba(16, 185, 129, 0.1));
}

.spatial-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0.4rem;
}

.grid-cell {
    aspect-ratio: 1;
    background: var(--color-primary);
    border-radius: var(--radius-sm);
    animation: grid-activate 3s ease-in-out infinite;
    opacity: 0.2;
}

@keyframes grid-activate {
    0%, 100% { 
        opacity: 0.2;
        background: var(--color-primary);
    }
    50% { 
        opacity: 1;
        background: var(--color-accent);
        box-shadow: 0 0 15px rgba(6, 182, 212, 0.6);
    }
}

/* Action Expert */
.action-expert {
    grid-column: 3 / 4;
    grid-row: 1;
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.15), rgba(245, 158, 11, 0.1));
}

.action-chunks {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

.action-chunk {
    height: 12px;
    background: var(--gradient-secondary);
    border-radius: var(--radius-sm);
    animation: action-generate 2s ease-in-out infinite;
    opacity: 0.3;
    transform-origin: left;
}

@keyframes action-generate {
    0%, 100% { 
        opacity: 0.3;
        transform: scaleX(0.5);
    }
    50% { 
        opacity: 1;
        transform: scaleX(1);
        box-shadow: 0 0 15px rgba(16, 185, 129, 0.5);
    }
}

/* Slow Thinker - Wan2.2 */
.slow-thinker {
    grid-column: 4 / 5;
    grid-row: 1 / 3;
    background: linear-gradient(135deg, rgba(139, 92, 246, 0.15), rgba(99, 102, 241, 0.1));
    position: relative;
}

.video-frames {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.video-frame-batch {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0.4rem;
}

.mini-frame {
    aspect-ratio: 16/9;
    background: var(--color-secondary);
    border-radius: var(--radius-sm);
    animation: video-generate 4s ease-in-out infinite;
    opacity: 0.3;
}

@keyframes video-generate {
    0%, 100% { 
        opacity: 0.3;
        transform: scale(0.9);
    }
    25% { 
        opacity: 1;
        transform: scale(1);
        box-shadow: 0 0 20px rgba(139, 92, 246, 0.6);
    }
}

.async-badge {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: rgba(139, 92, 246, 0.2);
    border: 1px solid var(--color-secondary);
    padding: 0.25rem 0.75rem;
    border-radius: 1rem;
    font-size: 0.625rem;
    font-family: var(--font-mono);
    font-weight: 600;
    color: var(--color-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    animation: async-blink 2s ease-in-out infinite;
}

@keyframes async-blink {
    0%, 100% { opacity: 0.6; }
    50% { opacity: 1; box-shadow: 0 0 15px rgba(139, 92, 246, 0.4); }
}

/* Flow Arrows */
.flow-arrow {
    position: relative;
    height: 2px;
    background: linear-gradient(90deg, 
        transparent 0%, 
        var(--color-primary) 50%, 
        transparent 100%
    );
    align-self: center;
    overflow: visible;
}

.fast-flow {
    grid-column: 1 / 2;
    grid-row: 1;
    margin-left: -0.5rem;
    transform: rotate(90deg) translateX(80px);
    width: 80px;
}

.action-flow {
    grid-column: 2 / 3;
    grid-row: 1;
    margin-left: -0.5rem;
    transform: rotate(90deg) translateX(80px);
    width: 80px;
}

.async-flow {
    grid-column: 4 / 5;
    grid-row: 1;
    transform: rotate(-135deg) translateY(-60px) translateX(-40px);
    width: 120px;
    background: linear-gradient(90deg, 
        transparent 0%, 
        var(--color-secondary) 50%, 
        transparent 100%
    );
}

/* Flow Particles */
.flow-particle {
    position: absolute;
    width: 8px;
    height: 8px;
    background: var(--color-primary);
    border-radius: 50%;
    box-shadow: 0 0 15px var(--color-primary);
    animation: flow-forward 1.5s linear infinite;
}

.flow-particle-slow {
    position: absolute;
    width: 10px;
    height: 10px;
    background: var(--color-secondary);
    border-radius: 50%;
    box-shadow: 0 0 20px var(--color-secondary);
    animation: flow-forward 3s linear infinite;
}

@keyframes flow-forward {
    0% {
        left: 0%;
        opacity: 0;
    }
    10% {
        opacity: 1;
    }
    90% {
        opacity: 1;
    }
    100% {
        left: 100%;
        opacity: 0;
    }
}

/* Timeline Indicator */
.timeline-indicator {
    grid-column: 1 / 5;
    grid-row: 3;
    margin-top: 2rem;
}

.timeline-bar {
    height: 6px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 3px;
    overflow: hidden;
    position: relative;
}

.timeline-progress {
    height: 100%;
    background: var(--gradient-primary);
    animation: timeline-advance 3s ease-in-out infinite;
    border-radius: 3px;
}

@keyframes timeline-advance {
    0%, 100% { width: 0%; }
    50% { width: 100%; }
}

.timeline-labels {
    display: flex;
    justify-content: space-between;
    margin-top: 0.75rem;
}

.timeline-label {
    font-size: 0.75rem;
    font-family: var(--font-mono);
    color: var(--color-text-secondary);
}

.timeline-label.slow {
    color: var(--color-secondary);
}

/* Responsive Architecture Animation */
@media (max-width: 1024px) {
    .architecture-content-wrapper {
        grid-template-columns: 1fr;
    }
    
    .architecture-animation {
        position: relative;
        top: 0;
        margin-bottom: 2rem;
    }
    
    .arch-animation-container {
        grid-template-columns: repeat(2, 1fr);
        min-height: 800px;
    }
    
    .fast-reasoner {
        grid-column: 1 / 2;
        grid-row: 1;
    }
    
    .vggt-module {
        grid-column: 2 / 3;
        grid-row: 1;
    }
    
    .action-expert {
        grid-column: 1 / 2;
        grid-row: 2;
    }
    
    .slow-thinker {
        grid-column: 2 / 3;
        grid-row: 2 / 4;
    }
    
    .timeline-indicator {
        grid-column: 1 / 3;
        grid-row: 4;
    }
}

@media (max-width: 768px) {
    .arch-animation-container {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .fast-reasoner,
    .vggt-module,
    .action-expert,
    .slow-thinker {
        grid-column: 1 / 2;
        grid-row: auto;
    }
    
    .flow-arrow {
        display: none;
    }
    
    .timeline-indicator {
        grid-column: 1 / 2;
    }
}

/* ===================================
   DualWorld Architecture Animation
   =================================== */

.dualworld-animation {
    position: relative;
    width: 100%;
    height: 100%;
    display: grid;
    grid-template-columns: 1fr 2fr 1fr;
    grid-template-rows: auto 1fr auto;
    gap: 2rem;
    padding: 2rem;
    background: radial-gradient(circle at 50% 50%, rgba(99, 102, 241, 0.1), transparent 70%);
}

/* Slow System (Left) */
.slow-system {
    grid-column: 1;
    grid-row: 1 / 3;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    animation: fadeInLeft 1s ease-out;
}

.system-label {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    opacity: 0.7;
}

.slow-label {
    color: #8b5cf6;
}

.fast-label {
    color: #06b6d4;
}

.system-box {
    background: rgba(30, 30, 46, 0.8);
    border: 2px solid;
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
}

.slow-box {
    border-color: rgba(139, 92, 246, 0.5);
    box-shadow: 0 0 20px rgba(139, 92, 246, 0.2);
    animation: pulse-slow 3s ease-in-out infinite;
}

.fast-box {
    border-color: rgba(6, 182, 212, 0.5);
    box-shadow: 0 0 20px rgba(6, 182, 212, 0.2);
    animation: pulse-fast 1s ease-in-out infinite;
}

.system-name {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.system-specs {
    font-size: 0.85rem;
    opacity: 0.7;
    font-family: var(--font-mono);
}

.video-frames {
    margin-top: 1rem;
}

.frame-strip {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0.5rem;
}

.frame {
    aspect-ratio: 16/9;
    background: linear-gradient(135deg, rgba(139, 92, 246, 0.2), rgba(99, 102, 241, 0.2));
    border: 1px solid rgba(139, 92, 246, 0.3);
    border-radius: var(--radius-sm);
    animation: frame-generate 3s ease-in-out infinite;
}

.frame:nth-child(1) { animation-delay: 0s; }
.frame:nth-child(2) { animation-delay: 0.3s; }
.frame:nth-child(3) { animation-delay: 0.6s; }
.frame:nth-child(4) { animation-delay: 0.9s; }

/* Center Pipeline */
.pipeline-center {
    grid-column: 2;
    grid-row: 1 / 3;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
    justify-content: center;
}

.vggt-box {
    background: rgba(30, 30, 46, 0.8);
    border: 2px solid rgba(99, 102, 241, 0.3);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    width: 80%;
    text-align: center;
}

.vggt-label {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--color-primary);
}

.spatial-tokens {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0.5rem;
}

.token {
    aspect-ratio: 1;
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.4), rgba(139, 92, 246, 0.4));
    border: 1px solid rgba(99, 102, 241, 0.5);
    border-radius: var(--radius-sm);
    animation: token-pulse 2s ease-in-out infinite;
}

.token:nth-child(1) { animation-delay: 0s; }
.token:nth-child(2) { animation-delay: 0.1s; }
.token:nth-child(3) { animation-delay: 0.2s; }
.token:nth-child(4) { animation-delay: 0.3s; }
.token:nth-child(5) { animation-delay: 0.4s; }
.token:nth-child(6) { animation-delay: 0.5s; }
.token:nth-child(7) { animation-delay: 0.6s; }
.token:nth-child(8) { animation-delay: 0.7s; }

.flow-arrow {
    width: 2px;
    height: 40px;
    background: linear-gradient(to bottom, var(--color-primary), transparent);
    position: relative;
    animation: flow-down 2s ease-in-out infinite;
}

.flow-arrow::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 0;
    border-left: 6px solid transparent;
    border-right: 6px solid transparent;
    border-top: 8px solid var(--color-primary);
}

.queue-box {
    background: rgba(30, 30, 46, 0.8);
    border: 2px solid rgba(99, 102, 241, 0.3);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    width: 80%;
    text-align: center;
}

.queue-label {
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.queue-slots {
    display: flex;
    gap: 1rem;
    justify-content: center;
}

.queue-slot {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.3), rgba(139, 92, 246, 0.3));
    border: 2px solid rgba(99, 102, 241, 0.5);
    border-radius: var(--radius-md);
    animation: queue-fill 2s ease-in-out infinite;
}

.queue-slot:nth-child(2) {
    animation-delay: 1s;
}

.action-box {
    background: rgba(30, 30, 46, 0.8);
    border: 2px solid rgba(16, 185, 129, 0.3);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    width: 80%;
    text-align: center;
}

.action-label {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--color-success);
}

.action-output {
    display: flex;
    gap: 0.5rem;
    justify-content: center;
}

.action-chunk {
    width: 40px;
    height: 50px;
    background: linear-gradient(to bottom, rgba(16, 185, 129, 0.4), rgba(6, 182, 212, 0.4));
    border: 1px solid rgba(16, 185, 129, 0.5);
    border-radius: var(--radius-sm);
    animation: action-generate 1s ease-in-out infinite;
}

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

/* Fast System (Right) */
.fast-system {
    grid-column: 3;
    grid-row: 1 / 3;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    animation: fadeInRight 1s ease-out;
}

.feature-flow {
    margin-top: 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.feature-line {
    height: 8px;
    background: linear-gradient(to right, rgba(6, 182, 212, 0.6), rgba(6, 182, 212, 0.2));
    border-radius: 4px;
    animation: feature-pulse 1s ease-in-out infinite;
}

.feature-line:nth-child(1) { animation-delay: 0s; }
.feature-line:nth-child(2) { animation-delay: 0.3s; }
.feature-line:nth-child(3) { animation-delay: 0.6s; }

/* Robot Output */
.robot-output {
    grid-column: 2;
    grid-row: 3;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

.robot-icon {
    font-size: 3rem;
    animation: robot-move 2s ease-in-out infinite;
}

.joint-actions {
    display: flex;
    gap: 0.5rem;
}

.joint-bar {
    width: 8px;
    height: 40px;
    background: linear-gradient(to top, var(--color-success), var(--color-accent));
    border-radius: 4px;
    animation: joint-activate 1.5s ease-in-out infinite;
}

.joint-bar:nth-child(1) { animation-delay: 0s; }
.joint-bar:nth-child(2) { animation-delay: 0.1s; }
.joint-bar:nth-child(3) { animation-delay: 0.2s; }
.joint-bar:nth-child(4) { animation-delay: 0.3s; }
.joint-bar:nth-child(5) { animation-delay: 0.4s; }
.joint-bar:nth-child(6) { animation-delay: 0.5s; }

/* Flow Connections SVG */
.flow-connections {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: -1;
}

.flow-path {
    stroke-dasharray: 10 5;
    animation: flow-dash 2s linear infinite;
}

/* Animations */
@keyframes fadeInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

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

@keyframes pulse-slow {
    0%, 100% {
        box-shadow: 0 0 20px rgba(139, 92, 246, 0.2);
        border-color: rgba(139, 92, 246, 0.5);
    }
    50% {
        box-shadow: 0 0 30px rgba(139, 92, 246, 0.4);
        border-color: rgba(139, 92, 246, 0.8);
    }
}

@keyframes pulse-fast {
    0%, 100% {
        box-shadow: 0 0 20px rgba(6, 182, 212, 0.2);
        border-color: rgba(6, 182, 212, 0.5);
    }
    50% {
        box-shadow: 0 0 30px rgba(6, 182, 212, 0.4);
        border-color: rgba(6, 182, 212, 0.8);
    }
}

@keyframes frame-generate {
    0%, 100% {
        opacity: 0.3;
        transform: scale(0.95);
    }
    50% {
        opacity: 1;
        transform: scale(1);
    }
}

@keyframes token-pulse {
    0%, 100% {
        opacity: 0.4;
        transform: scale(0.9);
    }
    50% {
        opacity: 1;
        transform: scale(1);
    }
}

@keyframes flow-down {
    0% {
        opacity: 0;
        transform: translateY(-20px);
    }
    50% {
        opacity: 1;
    }
    100% {
        opacity: 0;
        transform: translateY(20px);
    }
}

@keyframes queue-fill {
    0%, 20% {
        background: linear-gradient(135deg, rgba(99, 102, 241, 0.1), rgba(139, 92, 246, 0.1));
        transform: scale(0.9);
    }
    50%, 100% {
        background: linear-gradient(135deg, rgba(99, 102, 241, 0.5), rgba(139, 92, 246, 0.5));
        transform: scale(1);
    }
}

@keyframes action-generate {
    0%, 100% {
        opacity: 0.4;
        height: 30px;
    }
    50% {
        opacity: 1;
        height: 50px;
    }
}

@keyframes feature-pulse {
    0%, 100% {
        opacity: 0.3;
        width: 60%;
    }
    50% {
        opacity: 1;
        width: 100%;
    }
}

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

@keyframes joint-activate {
    0%, 100% {
        opacity: 0.3;
        height: 20px;
    }
    50% {
        opacity: 1;
        height: 40px;
    }
}

@keyframes flow-dash {
    to {
        stroke-dashoffset: -15;
    }
}

/* Responsive adjustments for animation */
@media (max-width: 768px) {
    .dualworld-animation {
        grid-template-columns: 1fr;
        grid-template-rows: auto auto auto auto;
        gap: 1rem;
        padding: 1rem;
    }
    
    .slow-system,
    .fast-system,
    .pipeline-center,
    .robot-output {
        grid-column: 1;
        grid-row: auto;
    }
    
    .flow-connections {
        display: none;
    }
}

/* ===================================
   Citation Section Styles
   =================================== */
.citation-section {
    padding: var(--spacing-xl) 0;
    background: var(--color-bg-primary);
}

.citation-box {
    position: relative;
    background: var(--color-bg-tertiary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    margin-top: var(--spacing-md);
    overflow: hidden;
}

.citation-box pre {
    margin: 0;
    padding: 0;
    overflow-x: auto;
}

.citation-box code {
    font-family: var(--font-mono);
    font-size: 0.9rem;
    line-height: 1.6;
    color: var(--color-text-primary);
    display: block;
}

.copy-btn {
    position: absolute;
    top: 1rem;
    right: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: var(--color-primary);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-base);
}

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

.copy-btn:hover {
    background: var(--color-primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.copy-btn:active {
    transform: translateY(0);
}

@media (max-width: 768px) {
    .citation-box {
        padding: var(--spacing-sm);
    }
    
    .citation-box code {
        font-size: 0.75rem;
    }
    
    .copy-btn {
        position: static;
        margin-top: 1rem;
        width: 100%;
        justify-content: center;
    }
}