/* ==========================================================================
   EBOVIR AI - Medical Grade Technology Website
   Professional, Scientific, Medical AI Aesthetic
   ========================================================================== */

/* --------------------------------------------------------------------------
   CSS Custom Properties (Design Tokens)
   -------------------------------------------------------------------------- */
:root {
    /* Primary Colors - Light Medical Palette with depth */
    --color-bg-primary: #ffffff;
    --color-bg-secondary: #f0f4f8;
    --color-bg-tertiary: #e2e8f0;
    --color-bg-card: #ffffff;
    --color-bg-elevated: #f8fafc;

    /* Accent Colors - Soft Blue Medical Palette */
    --color-accent-cyan: #3b82f6;
    --color-accent-blue: #2563eb;
    --color-accent-purple: #6366f1;
    --color-accent-teal: #60a5fa;
    --color-accent-green: #22c55e;

    /* Text Colors */
    --color-text-primary: #1e293b;
    --color-text-secondary: #475569;
    --color-text-tertiary: #64748b;
    --color-text-muted: #94a3b8;

    /* Border Colors */
    --color-border: rgba(15, 23, 42, 0.1);
    --color-border-light: rgba(15, 23, 42, 0.05);
    --color-border-accent: rgba(59, 130, 246, 0.4);

    /* Status Colors */
    --color-status-active: #3b82f6;
    --color-status-research: #f59e0b;
    --color-status-planned: #6366f1;

    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #60a5fa 0%, #3b82f6 50%, #2563eb 100%);
    --gradient-subtle: linear-gradient(180deg, rgba(59, 130, 246, 0.04) 0%, rgba(96, 165, 250, 0.02) 100%);
    --gradient-card: linear-gradient(180deg, var(--color-bg-card) 0%, var(--color-bg-secondary) 100%);

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

    /* Font Sizes */
    --text-xs: 0.75rem;
    --text-sm: 0.875rem;
    --text-base: 1rem;
    --text-lg: 1.125rem;
    --text-xl: 1.25rem;
    --text-2xl: 1.5rem;
    --text-3xl: 1.875rem;
    --text-4xl: 2.25rem;
    --text-5xl: 3rem;
    --text-6xl: 3.75rem;

    /* Spacing */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;
    --space-20: 5rem;
    --space-24: 6rem;

    /* Border Radius */
    --radius-sm: 0.25rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;

    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.08);
    --shadow-md: 0 4px 12px rgba(15, 23, 42, 0.1);
    --shadow-lg: 0 10px 30px rgba(15, 23, 42, 0.12);
    --shadow-xl: 0 25px 50px rgba(15, 23, 42, 0.15);
    --shadow-glow: 0 0 40px rgba(59, 130, 246, 0.25);

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 350ms ease;

    /* Container */
    --container-max: 1280px;
    --container-padding: var(--space-6);
}

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

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-primary);
    font-size: var(--text-base);
    line-height: 1.6;
    color: var(--color-text-primary);
    background-color: var(--color-bg-primary);
    min-height: 100vh;
}

img, svg {
    display: block;
    max-width: 100%;
}

a {
    color: inherit;
    text-decoration: none;
}

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

ul, ol {
    list-style: none;
}

/* --------------------------------------------------------------------------
   Utility Classes
   -------------------------------------------------------------------------- */
.container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

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

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* --------------------------------------------------------------------------
   Navigation
   -------------------------------------------------------------------------- */
.main-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-sm);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: var(--space-4) var(--container-padding);
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    font-weight: 600;
    font-size: var(--text-xl);
    transition: opacity var(--transition-base);
}

.logo:hover {
    opacity: 0.8;
}

.logo-icon {
    width: 40px;
    height: 40px;
    color: var(--color-accent-cyan);
}

.logo-text {
    color: var(--color-text-primary);
}

.logo-accent {
    color: var(--color-accent-cyan);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--space-8);
}

.nav-links a {
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--color-text-secondary);
    transition: color var(--transition-base);
    position: relative;
}

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

.nav-links a.active::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--gradient-primary);
    border-radius: var(--radius-full);
}

.nav-cta {
    padding: var(--space-2) var(--space-4) !important;
    background: var(--gradient-primary);
    border-radius: var(--radius-md);
    color: #ffffff !important;
    font-weight: 600 !important;
}

.nav-cta:hover {
    opacity: 0.9;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: var(--space-2);
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-text-primary);
    border-radius: var(--radius-full);
    transition: var(--transition-base);
}

/* --------------------------------------------------------------------------
   Buttons
   -------------------------------------------------------------------------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-6);
    font-size: var(--text-sm);
    font-weight: 600;
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
    cursor: pointer;
}

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

.btn-primary:hover {
    opacity: 0.9;
    transform: translateY(-1px);
    box-shadow: var(--shadow-glow);
}

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

.btn-secondary:hover {
    background: var(--color-bg-card);
    border-color: var(--color-accent-cyan);
}

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

.btn-outline:hover {
    background: rgba(59, 130, 246, 0.1);
}

/* --------------------------------------------------------------------------
   Hero Section
   -------------------------------------------------------------------------- */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: var(--space-24) 0 var(--space-16);
    overflow: hidden;
}

.hero-background {
    position: absolute;
    inset: 0;
    z-index: 0;
    background: linear-gradient(180deg, #ffffff 0%, #f0f4f8 100%);
}

.hero-grid {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(59, 130, 246, 0.08) 1px, transparent 1px),
        linear-gradient(90deg, rgba(59, 130, 246, 0.08) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse at center, black 0%, transparent 70%);
}

.hero-particles {
    position: absolute;
    inset: 0;
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

.hero-badge {
    display: inline-block;
    padding: var(--space-2) var(--space-4);
    background: rgba(59, 130, 246, 0.08);
    border: 1px solid rgba(59, 130, 246, 0.2);
    border-radius: var(--radius-full);
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--color-accent-cyan);
    margin-bottom: var(--space-6);
}

.hero h1 {
    font-size: clamp(var(--text-4xl), 5vw, var(--text-6xl));
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: var(--space-6);
    max-width: 900px;
}

.hero-subtitle {
    font-size: var(--text-lg);
    color: var(--color-text-secondary);
    max-width: 640px;
    margin-bottom: var(--space-8);
    line-height: 1.7;
}

.hero-cta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-4);
    margin-bottom: var(--space-12);
}

.hero-metrics {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--space-8);
    padding-top: var(--space-8);
    border-top: 1px solid var(--color-border);
}

.metric {
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
}

.metric-value {
    font-size: var(--text-lg);
    font-weight: 600;
    color: var(--color-accent-cyan);
}

.metric-label {
    font-size: var(--text-sm);
    color: var(--color-text-tertiary);
}

.metric-divider {
    width: 1px;
    height: 40px;
    background: var(--color-border);
}

.hero-visual {
    position: absolute;
    right: 5%;
    top: 50%;
    transform: translateY(-50%);
    width: 400px;
    height: 400px;
    opacity: 0.3;
    pointer-events: none;
}

.dna-helix {
    width: 100%;
    height: 100%;
}

/* --------------------------------------------------------------------------
   Page Headers
   -------------------------------------------------------------------------- */
.page-header {
    position: relative;
    padding: calc(var(--space-24) + 80px) 0 var(--space-16);
    overflow: hidden;
}

.page-header-content {
    position: relative;
    z-index: 1;
    max-width: 720px;
}

.page-label {
    display: inline-block;
    padding: var(--space-1) var(--space-3);
    background: rgba(59, 130, 246, 0.08);
    border-radius: var(--radius-sm);
    font-size: var(--text-xs);
    font-weight: 600;
    color: var(--color-accent-cyan);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--space-4);
}

.page-header h1 {
    font-size: clamp(var(--text-3xl), 4vw, var(--text-5xl));
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: var(--space-4);
}

.page-header p {
    font-size: var(--text-lg);
    color: var(--color-text-secondary);
    line-height: 1.7;
}

.page-header-bg {
    position: absolute;
    inset: 0;
    background: var(--gradient-subtle);
    z-index: 0;
}

.page-header-bg::after {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(59, 130, 246, 0.04) 1px, transparent 1px),
        linear-gradient(90deg, rgba(59, 130, 246, 0.04) 1px, transparent 1px);
    background-size: 40px 40px;
}

/* --------------------------------------------------------------------------
   Section Styles
   -------------------------------------------------------------------------- */
section {
    padding: var(--space-20) 0;
}

.section-header {
    text-align: center;
    margin-bottom: var(--space-12);
}

.section-label {
    display: inline-block;
    padding: var(--space-1) var(--space-3);
    background: rgba(59, 130, 246, 0.08);
    border-radius: var(--radius-sm);
    font-size: var(--text-xs);
    font-weight: 600;
    color: var(--color-accent-cyan);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--space-4);
}

.section-header h2 {
    font-size: clamp(var(--text-2xl), 3vw, var(--text-4xl));
    font-weight: 700;
    margin-bottom: var(--space-4);
}

.section-header p {
    font-size: var(--text-lg);
    color: var(--color-text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

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

/* --------------------------------------------------------------------------
   Focus Areas (Home Page)
   -------------------------------------------------------------------------- */
.focus-areas {
    background: var(--color-bg-secondary);
}

.focus-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-6);
}

.focus-card {
    padding: var(--space-8);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    transition: all var(--transition-base);
    box-shadow: var(--shadow-md);
}

.focus-card:hover {
    border-color: var(--color-border-accent);
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.focus-icon {
    width: 48px;
    height: 48px;
    margin-bottom: var(--space-4);
    color: var(--color-accent-cyan);
}

.focus-card h3 {
    font-size: var(--text-xl);
    font-weight: 600;
    margin-bottom: var(--space-3);
}

.focus-card p {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-4);
    line-height: 1.7;
}

.focus-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.focus-list li {
    font-size: var(--text-sm);
    color: var(--color-text-tertiary);
    padding-left: var(--space-4);
    position: relative;
}

.focus-list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 6px;
    height: 6px;
    background: var(--color-accent-cyan);
    border-radius: var(--radius-full);
    opacity: 0.5;
}

/* --------------------------------------------------------------------------
   Featured Projects (Home Page)
   -------------------------------------------------------------------------- */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
    gap: var(--space-6);
}

.project-card {
    padding: var(--space-6);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    transition: all var(--transition-base);
    box-shadow: var(--shadow-md);
}

.project-card:hover {
    border-color: var(--color-border-accent);
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.project-card.featured {
    grid-column: span 1;
    background: linear-gradient(135deg, #ffffff 0%, rgba(59, 130, 246, 0.08) 100%);
    border-color: rgba(59, 130, 246, 0.25);
}

.project-status {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--text-xs);
    font-weight: 500;
    color: var(--color-text-tertiary);
    margin-bottom: var(--space-4);
}

.status-indicator {
    width: 8px;
    height: 8px;
    border-radius: var(--radius-full);
}

.status-indicator.active {
    background: var(--color-status-active);
    box-shadow: 0 0 8px var(--color-status-active);
}

.status-indicator.research {
    background: var(--color-status-research);
    box-shadow: 0 0 8px var(--color-status-research);
}

.project-card h3 {
    font-size: var(--text-xl);
    font-weight: 600;
    margin-bottom: var(--space-3);
}

.project-context {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-4);
    line-height: 1.7;
}

.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
    margin-bottom: var(--space-4);
}

.tech-tag {
    padding: var(--space-1) var(--space-3);
    background: var(--color-bg-elevated);
    border-radius: var(--radius-sm);
    font-size: var(--text-xs);
    font-weight: 500;
    color: var(--color-text-secondary);
}

.project-meta {
    display: flex;
    gap: var(--space-6);
    padding-top: var(--space-4);
    border-top: 1px solid var(--color-border);
    margin-bottom: var(--space-4);
}

.meta-item {
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
}

.meta-label {
    font-size: var(--text-xs);
    color: var(--color-text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.meta-value {
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--color-text-secondary);
}

.project-link {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--color-accent-cyan);
    transition: gap var(--transition-base);
}

.project-link:hover {
    gap: var(--space-3);
}

.project-link svg {
    width: 16px;
    height: 16px;
}

.section-cta {
    text-align: center;
    margin-top: var(--space-12);
}

/* --------------------------------------------------------------------------
   Impact Section (Home Page)
   -------------------------------------------------------------------------- */
.impact-section {
    background: var(--color-bg-secondary);
}

.impact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-12);
    align-items: start;
}

.impact-content h2 {
    font-size: var(--text-3xl);
    font-weight: 700;
    margin-bottom: var(--space-4);
}

.impact-content p {
    font-size: var(--text-base);
    color: var(--color-text-secondary);
    line-height: 1.7;
}

.impact-items {
    display: flex;
    flex-direction: column;
    gap: var(--space-6);
}

.impact-item {
    display: flex;
    gap: var(--space-4);
    padding: var(--space-5);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    transition: border-color var(--transition-base);
}

.impact-item:hover {
    border-color: var(--color-border-accent);
}

.impact-icon {
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(59, 130, 246, 0.1);
    border-radius: var(--radius-md);
    color: var(--color-accent-cyan);
}

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

.impact-text h4 {
    font-size: var(--text-base);
    font-weight: 600;
    margin-bottom: var(--space-1);
}

.impact-text p {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    line-height: 1.6;
}

/* --------------------------------------------------------------------------
   Technology Preview (Home Page)
   -------------------------------------------------------------------------- */
.tech-preview-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-12);
    align-items: center;
}

.tech-preview-content h2 {
    font-size: var(--text-3xl);
    font-weight: 700;
    margin-bottom: var(--space-4);
}

.tech-preview-content > p {
    font-size: var(--text-base);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-6);
    line-height: 1.7;
}

.tech-stack-preview {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
    margin-bottom: var(--space-6);
}

.stack-category h5 {
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--color-accent-cyan);
    margin-bottom: var(--space-1);
}

.stack-category span {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
}

.architecture-diagram {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}

.arch-layer {
    padding: var(--space-4);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
}

.arch-layer[data-layer="intelligence"] {
    border-color: var(--color-border-accent);
    background: rgba(59, 130, 246, 0.08);
}

.layer-label {
    display: block;
    font-size: var(--text-xs);
    font-weight: 600;
    color: var(--color-text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--space-3);
}

.layer-nodes {
    display: flex;
    gap: var(--space-2);
}

.node {
    flex: 1;
    padding: var(--space-2) var(--space-3);
    background: var(--color-bg-elevated);
    border-radius: var(--radius-sm);
    font-size: var(--text-xs);
    font-weight: 500;
    text-align: center;
    color: var(--color-text-secondary);
}

.node.highlight {
    background: rgba(59, 130, 246, 0.15);
    color: var(--color-accent-cyan);
}

.arch-connector {
    width: 2px;
    height: 20px;
    background: var(--color-border);
    margin: 0 auto;
}

/* --------------------------------------------------------------------------
   CTA Section
   -------------------------------------------------------------------------- */
.cta-section {
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.08) 0%, rgba(96, 165, 250, 0.05) 100%);
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
}

.cta-content {
    text-align: center;
    max-width: 640px;
    margin: 0 auto;
}

.cta-content h2 {
    font-size: var(--text-3xl);
    font-weight: 700;
    margin-bottom: var(--space-4);
}

.cta-content p {
    font-size: var(--text-lg);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-6);
}

.cta-buttons {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: var(--space-4);
}

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */
.main-footer {
    background: var(--color-bg-secondary);
    padding: var(--space-16) 0 var(--space-8);
    border-top: 1px solid var(--color-border);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 3fr;
    gap: var(--space-12);
    margin-bottom: var(--space-12);
}

.footer-brand .logo {
    margin-bottom: var(--space-4);
}

.footer-tagline {
    font-size: var(--text-sm);
    color: var(--color-text-tertiary);
    max-width: 300px;
    line-height: 1.7;
}

.footer-nav {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-8);
}

.footer-col h4 {
    font-size: var(--text-sm);
    font-weight: 600;
    margin-bottom: var(--space-4);
    color: var(--color-text-primary);
}

.footer-col ul {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.footer-col a {
    font-size: var(--text-sm);
    color: var(--color-text-tertiary);
    transition: color var(--transition-base);
}

.footer-col a:hover {
    color: var(--color-accent-cyan);
}

.footer-bottom {
    padding-top: var(--space-8);
    border-top: 1px solid var(--color-border);
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: var(--space-4);
}

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

.footer-legal {
    max-width: 500px;
    text-align: right;
}

/* --------------------------------------------------------------------------
   Projects Page
   -------------------------------------------------------------------------- */
.projects-overview {
    padding: var(--space-8) 0;
    border-bottom: 1px solid var(--color-border);
}

.overview-stats {
    display: flex;
    justify-content: center;
    gap: var(--space-12);
}

.stat-item {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.stat-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(59, 130, 246, 0.1);
    border-radius: var(--radius-md);
    color: var(--color-accent-cyan);
}

.stat-icon svg {
    width: 20px;
    height: 20px;
}

.stat-content {
    display: flex;
    flex-direction: column;
}

.stat-label {
    font-size: var(--text-xs);
    color: var(--color-text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.stat-value {
    font-size: var(--text-xl);
    font-weight: 700;
    color: var(--color-text-primary);
}

.projects-filter {
    padding: var(--space-6) 0;
    background: var(--color-bg-secondary);
}

.filter-bar {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    flex-wrap: wrap;
}

.filter-label {
    font-size: var(--text-sm);
    color: var(--color-text-tertiary);
}

.filter-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
}

.filter-btn {
    padding: var(--space-2) var(--space-4);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--color-text-secondary);
    transition: all var(--transition-base);
}

.filter-btn:hover {
    border-color: var(--color-accent-cyan);
    color: var(--color-text-primary);
}

.filter-btn.active {
    background: rgba(59, 130, 246, 0.1);
    border-color: var(--color-accent-cyan);
    color: var(--color-accent-cyan);
}

.projects-list {
    padding-top: var(--space-8);
}

.project-detail {
    padding: var(--space-10);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-2xl);
    margin-bottom: var(--space-8);
}

.project-meta-header {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    margin-bottom: var(--space-4);
}

.project-number {
    font-size: var(--text-sm);
    font-weight: 700;
    color: var(--color-accent-cyan);
    font-family: var(--font-mono);
}

.project-status-badge {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-1) var(--space-3);
    background: var(--color-bg-elevated);
    border-radius: var(--radius-full);
    font-size: var(--text-xs);
    font-weight: 500;
    color: var(--color-text-tertiary);
}

.project-status-badge.active .status-dot {
    background: var(--color-status-active);
    box-shadow: 0 0 6px var(--color-status-active);
}

.project-status-badge.research .status-dot {
    background: var(--color-status-research);
    box-shadow: 0 0 6px var(--color-status-research);
}

.status-dot {
    width: 6px;
    height: 6px;
    border-radius: var(--radius-full);
}

.project-header h2 {
    font-size: var(--text-2xl);
    font-weight: 700;
    margin-bottom: var(--space-2);
}

.project-tagline {
    font-size: var(--text-lg);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-8);
}

.project-section {
    margin-bottom: var(--space-8);
}

.project-section h3 {
    font-size: var(--text-lg);
    font-weight: 600;
    margin-bottom: var(--space-4);
    color: var(--color-accent-cyan);
}

.project-section p {
    font-size: var(--text-base);
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-bottom: var(--space-3);
}

.approach-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-4);
}

.approach-item {
    padding: var(--space-4);
    background: var(--color-bg-elevated);
    border-radius: var(--radius-lg);
}

.approach-item h4 {
    font-size: var(--text-sm);
    font-weight: 600;
    margin-bottom: var(--space-2);
    color: var(--color-text-primary);
}

.approach-item p {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    margin-bottom: 0;
}

.project-details-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-4);
    margin-bottom: var(--space-6);
}

.detail-card {
    padding: var(--space-5);
    background: var(--color-bg-elevated);
    border-radius: var(--radius-lg);
}

.detail-card h4 {
    font-size: var(--text-sm);
    font-weight: 600;
    margin-bottom: var(--space-3);
    color: var(--color-text-primary);
}

.detail-card ul {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.detail-card li {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    padding-left: var(--space-4);
    position: relative;
}

.detail-card li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 8px;
    width: 4px;
    height: 4px;
    background: var(--color-accent-cyan);
    border-radius: var(--radius-full);
}

.project-links {
    display: flex;
    gap: var(--space-4);
    padding-top: var(--space-6);
    border-top: 1px solid var(--color-border);
}

.project-link-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-5);
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--color-text-secondary);
    transition: all var(--transition-base);
}

.project-link-btn:hover {
    border-color: var(--color-accent-cyan);
    color: var(--color-accent-cyan);
}

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

/* --------------------------------------------------------------------------
   Technology Page
   -------------------------------------------------------------------------- */
.tech-overview {
    padding-bottom: var(--space-8);
}

.tech-intro {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-12);
    align-items: center;
}

.tech-intro-content h2 {
    font-size: var(--text-3xl);
    font-weight: 700;
    margin-bottom: var(--space-4);
}

.tech-intro-content p {
    font-size: var(--text-base);
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-bottom: var(--space-3);
}

.tech-pillars {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-4);
}

.pillar {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-5);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    text-align: center;
}

.pillar-icon {
    width: 40px;
    height: 40px;
    color: var(--color-accent-cyan);
}

.pillar-label {
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--color-text-primary);
}

.tech-section {
    padding: var(--space-16) 0;
}

.tech-cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--space-6);
}

.tech-card {
    padding: var(--space-6);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    transition: all var(--transition-base);
}

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

.tech-card-header {
    display: flex;
    align-items: flex-start;
    gap: var(--space-4);
    margin-bottom: var(--space-4);
}

.tech-card-icon {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    color: var(--color-accent-cyan);
}

.tech-card h3 {
    font-size: var(--text-xl);
    font-weight: 600;
    margin-top: var(--space-2);
}

.tech-card > p {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-bottom: var(--space-4);
}

.tech-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
    margin-bottom: var(--space-4);
}

.tech-list li {
    font-size: var(--text-sm);
    color: var(--color-text-tertiary);
    padding-left: var(--space-4);
    position: relative;
}

.tech-list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 8px;
    width: 4px;
    height: 4px;
    background: var(--color-accent-cyan);
    border-radius: var(--radius-full);
}

.tech-tools {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
    padding-top: var(--space-4);
    border-top: 1px solid var(--color-border);
}

.tool-tag {
    padding: var(--space-1) var(--space-2);
    background: var(--color-bg-elevated);
    border-radius: var(--radius-sm);
    font-size: var(--text-xs);
    font-weight: 500;
    font-family: var(--font-mono);
    color: var(--color-text-tertiary);
}

.principles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-6);
}

.principle-card {
    padding: var(--space-6);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
}

.principle-number {
    font-size: var(--text-sm);
    font-weight: 700;
    font-family: var(--font-mono);
    color: var(--color-accent-cyan);
    margin-bottom: var(--space-3);
}

.principle-card h3 {
    font-size: var(--text-xl);
    font-weight: 600;
    margin-bottom: var(--space-3);
}

.principle-card > p {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-bottom: var(--space-4);
}

.principle-points {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.principle-points li {
    font-size: var(--text-sm);
    color: var(--color-text-tertiary);
    padding-left: var(--space-4);
    position: relative;
}

.principle-points li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 8px;
    width: 4px;
    height: 4px;
    background: var(--color-accent-cyan);
    border-radius: var(--radius-full);
}

.tech-summary {
    padding: var(--space-16) 0;
    background: var(--color-bg-primary);
}

.summary-header {
    text-align: center;
    margin-bottom: var(--space-10);
}

.summary-header h2 {
    font-size: var(--text-2xl);
    font-weight: 700;
    margin-bottom: var(--space-2);
}

.summary-header p {
    font-size: var(--text-base);
    color: var(--color-text-secondary);
}

.stack-categories {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-6);
}

.stack-categories .stack-category {
    text-align: center;
}

.stack-categories h4 {
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--color-accent-cyan);
    margin-bottom: var(--space-3);
}

.stack-items {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--space-2);
}

.stack-items span {
    padding: var(--space-1) var(--space-3);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
}

/* --------------------------------------------------------------------------
   Applications Page
   -------------------------------------------------------------------------- */
.applications-intro {
    padding-bottom: var(--space-8);
}

.intro-content {
    max-width: 720px;
    margin-bottom: var(--space-8);
}

.intro-content h2 {
    font-size: var(--text-2xl);
    font-weight: 700;
    margin-bottom: var(--space-4);
}

.intro-content p {
    font-size: var(--text-base);
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-bottom: var(--space-3);
}

.application-domains {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
}

.domain-tag {
    padding: var(--space-2) var(--space-4);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-full);
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--color-text-secondary);
}

.use-case {
    padding: var(--space-16) 0;
}

.use-case-header {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    margin-bottom: var(--space-8);
}

.use-case-number {
    font-size: var(--text-2xl);
    font-weight: 700;
    font-family: var(--font-mono);
    color: var(--color-accent-cyan);
}

.use-case-domain {
    padding: var(--space-1) var(--space-3);
    background: rgba(59, 130, 246, 0.1);
    border-radius: var(--radius-sm);
    font-size: var(--text-xs);
    font-weight: 600;
    color: var(--color-accent-cyan);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.use-case-grid {
    display: grid;
    grid-template-columns: 1fr 400px;
    gap: var(--space-12);
    align-items: start;
}

.use-case-content h2 {
    font-size: var(--text-2xl);
    font-weight: 700;
    margin-bottom: var(--space-6);
}

.scenario-box,
.solution-box,
.value-box {
    padding: var(--space-6);
    border-radius: var(--radius-xl);
    margin-bottom: var(--space-6);
}

.scenario-box {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
}

.solution-box {
    background: rgba(59, 130, 246, 0.05);
    border: 1px solid rgba(59, 130, 246, 0.2);
}

.value-box {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
}

.scenario-box h3,
.solution-box h3,
.value-box h3 {
    font-size: var(--text-base);
    font-weight: 600;
    margin-bottom: var(--space-3);
}

.solution-box h3 {
    color: var(--color-accent-cyan);
}

.scenario-box p,
.solution-box > p {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    line-height: 1.7;
}

.solution-features {
    margin-top: var(--space-4);
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.solution-features li {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    line-height: 1.6;
}

.solution-features li strong {
    color: var(--color-text-primary);
}

.value-points {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}

.value-point {
    display: flex;
    gap: var(--space-3);
}

.value-icon {
    flex-shrink: 0;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(59, 130, 246, 0.1);
    border-radius: var(--radius-md);
    color: var(--color-accent-cyan);
}

.value-icon svg {
    width: 18px;
    height: 18px;
}

.value-point strong {
    display: block;
    font-size: var(--text-sm);
    font-weight: 600;
    margin-bottom: var(--space-1);
}

.value-point p {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
}

.use-case-visual {
    position: sticky;
    top: 120px;
}

.diagnostic-flow {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-4);
    padding: var(--space-6);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
}

.flow-step {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-4);
    background: var(--color-bg-elevated);
    border-radius: var(--radius-lg);
    width: 100%;
    text-align: center;
}

.flow-step.highlight {
    background: rgba(59, 130, 246, 0.08);
    border: 1px solid rgba(59, 130, 246, 0.25);
}

.flow-step .step-icon {
    width: 32px;
    height: 32px;
    color: var(--color-accent-cyan);
}

.flow-step span {
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--color-text-secondary);
}

.flow-step.highlight span {
    color: var(--color-accent-cyan);
}

.flow-arrow {
    width: 2px;
    height: 20px;
    background: var(--color-border);
}

.research-pipeline,
.precision-diagram,
.lab-workflow,
.decision-framework {
    padding: var(--space-6);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
}

.pipeline-stage {
    padding: var(--space-4);
    background: var(--color-bg-elevated);
    border-radius: var(--radius-lg);
    margin-bottom: var(--space-4);
}

.pipeline-stage.highlight {
    background: rgba(59, 130, 246, 0.08);
    border: 1px solid rgba(59, 130, 246, 0.25);
}

.stage-header {
    font-size: var(--text-xs);
    font-weight: 600;
    color: var(--color-text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--space-2);
}

.pipeline-stage.highlight .stage-header {
    color: var(--color-accent-cyan);
}

.stage-items {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
}

.stage-items span {
    padding: var(--space-1) var(--space-2);
    background: var(--color-bg-card);
    border-radius: var(--radius-sm);
    font-size: var(--text-xs);
    color: var(--color-text-secondary);
}

.pipeline-connector {
    width: 2px;
    height: 16px;
    background: var(--color-border);
    margin: 0 auto var(--space-4);
}

.precision-layer {
    padding: var(--space-4);
    background: var(--color-bg-elevated);
    border-radius: var(--radius-lg);
    margin-bottom: var(--space-3);
    text-align: center;
}

.precision-layer.highlight {
    background: rgba(59, 130, 246, 0.08);
    border: 1px solid rgba(59, 130, 246, 0.25);
}

.layer-title {
    display: block;
    font-size: var(--text-xs);
    font-weight: 600;
    color: var(--color-text-tertiary);
    margin-bottom: var(--space-2);
}

.precision-layer.highlight .layer-title {
    color: var(--color-accent-cyan);
}

.layer-content {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--space-2);
}

.variant-tag,
.option-tag {
    padding: var(--space-1) var(--space-2);
    background: var(--color-bg-card);
    border-radius: var(--radius-sm);
    font-size: var(--text-xs);
    font-weight: 500;
    color: var(--color-text-secondary);
}

.analysis-item {
    font-size: var(--text-sm);
    color: var(--color-accent-cyan);
}

.precision-arrow {
    width: 2px;
    height: 16px;
    background: var(--color-border);
    margin: 0 auto var(--space-3);
}

.lab-workflow {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-3);
}

.workflow-node {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-4);
    background: var(--color-bg-elevated);
    border-radius: var(--radius-lg);
    width: 100%;
    text-align: center;
}

.workflow-node.highlight {
    background: rgba(59, 130, 246, 0.08);
    border: 1px solid rgba(59, 130, 246, 0.25);
}

.workflow-node svg {
    width: 24px;
    height: 24px;
    color: var(--color-accent-cyan);
}

.workflow-node span {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
}

.workflow-line {
    width: 2px;
    height: 16px;
    background: var(--color-border);
}

.decision-framework {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-6);
}

.framework-center {
    width: 120px;
    height: 120px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(59, 130, 246, 0.08);
    border: 2px solid rgba(59, 130, 246, 0.25);
    border-radius: var(--radius-full);
    text-align: center;
}

.framework-center span {
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--color-accent-cyan);
}

.framework-inputs {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-3);
    width: 100%;
}

.input-item {
    padding: var(--space-3);
    background: var(--color-bg-elevated);
    border-radius: var(--radius-md);
    font-size: var(--text-sm);
    text-align: center;
    color: var(--color-text-secondary);
}

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

.implementation-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-6);
}

.impl-step {
    padding: var(--space-6);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
}

.impl-number {
    font-size: var(--text-lg);
    font-weight: 700;
    font-family: var(--font-mono);
    color: var(--color-accent-cyan);
    margin-bottom: var(--space-3);
}

.impl-step h3 {
    font-size: var(--text-base);
    font-weight: 600;
    margin-bottom: var(--space-2);
}

.impl-step p {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    line-height: 1.6;
}

/* --------------------------------------------------------------------------
   About Page
   -------------------------------------------------------------------------- */
.about-section {
    padding: var(--space-16) 0;
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-12);
    align-items: start;
}

.about-content h2 {
    font-size: var(--text-3xl);
    font-weight: 700;
    margin-bottom: var(--space-6);
}

.about-content p {
    font-size: var(--text-base);
    color: var(--color-text-secondary);
    line-height: 1.8;
    margin-bottom: var(--space-4);
}

.evolution-timeline {
    display: flex;
    flex-direction: column;
    gap: var(--space-6);
    position: relative;
    padding-left: var(--space-8);
}

.evolution-timeline::before {
    content: '';
    position: absolute;
    left: 12px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--color-border);
}

.timeline-item {
    position: relative;
}

.timeline-marker {
    position: absolute;
    left: calc(-1 * var(--space-8) + 6px);
    top: 4px;
    width: 14px;
    height: 14px;
    background: var(--color-bg-elevated);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-full);
}

.timeline-item.active .timeline-marker {
    background: var(--color-accent-cyan);
    border-color: var(--color-accent-cyan);
    box-shadow: 0 0 10px var(--color-accent-cyan);
}

.timeline-content h4 {
    font-size: var(--text-base);
    font-weight: 600;
    margin-bottom: var(--space-1);
}

.timeline-item.active .timeline-content h4 {
    color: var(--color-accent-cyan);
}

.timeline-content p {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
}

.what-we-do {
    background: var(--color-bg-secondary);
}

.what-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-6);
}

.what-card {
    padding: var(--space-8);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    text-align: center;
}

.what-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto var(--space-4);
    color: var(--color-accent-cyan);
}

.what-card h3 {
    font-size: var(--text-xl);
    font-weight: 600;
    margin-bottom: var(--space-3);
}

.what-card p {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    line-height: 1.7;
}

.approach-section {
    padding: var(--space-16) 0;
}

.approach-grid {
    display: grid;
    grid-template-columns: 1fr 400px;
    gap: var(--space-12);
    align-items: center;
}

.approach-content h2 {
    font-size: var(--text-3xl);
    font-weight: 700;
    margin-bottom: var(--space-4);
}

.approach-content > p {
    font-size: var(--text-base);
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-bottom: var(--space-6);
}

.approach-principles {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-4);
}

.principle {
    padding: var(--space-4);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
}

.principle h4 {
    font-size: var(--text-sm);
    font-weight: 600;
    margin-bottom: var(--space-2);
    color: var(--color-accent-cyan);
}

.principle p {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    line-height: 1.6;
}

.approach-diagram {
    position: relative;
    width: 300px;
    height: 300px;
    margin: 0 auto;
}

.diagram-center {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 100px;
    height: 100px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(59, 130, 246, 0.08);
    border: 2px solid rgba(59, 130, 246, 0.25);
    border-radius: var(--radius-full);
    text-align: center;
}

.diagram-center span {
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--color-accent-cyan);
}

.diagram-orbit {
    position: absolute;
    inset: 0;
}

.orbit-item {
    position: absolute;
    padding: var(--space-2) var(--space-3);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: var(--text-xs);
    font-weight: 500;
    color: var(--color-text-secondary);
    white-space: nowrap;
}

.orbit-item:nth-child(1) { top: 0; left: 50%; transform: translateX(-50%); }
.orbit-item:nth-child(2) { right: 0; top: 50%; transform: translateY(-50%); }
.orbit-item:nth-child(3) { bottom: 0; left: 50%; transform: translateX(-50%); }
.orbit-item:nth-child(4) { left: 0; top: 50%; transform: translateY(-50%); }

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

.vision-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-12);
    align-items: start;
}

.vision-statement {
    padding: var(--space-8);
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.06) 0%, rgba(96, 165, 250, 0.04) 100%);
    border: 1px solid rgba(59, 130, 246, 0.2);
    border-radius: var(--radius-xl);
}

.vision-quote {
    font-size: var(--text-xl);
    font-style: italic;
    color: var(--color-text-primary);
    line-height: 1.7;
}

.vision-pillars {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-4);
}

.vision-pillar {
    padding: var(--space-5);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
}

.vision-pillar .pillar-icon {
    width: 32px;
    height: 32px;
    margin-bottom: var(--space-3);
    color: var(--color-accent-cyan);
}

.vision-pillar h3 {
    font-size: var(--text-base);
    font-weight: 600;
    margin-bottom: var(--space-2);
}

.vision-pillar p {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    line-height: 1.6;
}

.collaboration-section {
    padding: var(--space-16) 0;
}

.collab-grid {
    display: grid;
    grid-template-columns: 1fr 400px;
    gap: var(--space-12);
    align-items: center;
}

.collab-content h2 {
    font-size: var(--text-3xl);
    font-weight: 700;
    margin-bottom: var(--space-4);
}

.collab-content > p {
    font-size: var(--text-base);
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-bottom: var(--space-6);
}

.collab-points {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}

.collab-point {
    display: flex;
    gap: var(--space-3);
}

.point-marker {
    flex-shrink: 0;
    width: 8px;
    height: 8px;
    margin-top: 6px;
    background: var(--color-accent-cyan);
    border-radius: var(--radius-full);
}

.collab-point strong {
    display: block;
    font-size: var(--text-sm);
    font-weight: 600;
    margin-bottom: var(--space-1);
}

.collab-point p {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
}

.partnership-model {
    position: relative;
    width: 280px;
    height: 280px;
    margin: 0 auto;
}

.model-center {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 100px;
    height: 100px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(59, 130, 246, 0.08);
    border: 2px solid rgba(59, 130, 246, 0.25);
    border-radius: var(--radius-full);
}

.model-center span {
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--color-accent-cyan);
}

.model-connections {
    position: absolute;
    inset: 0;
}

.connection {
    position: absolute;
    padding: var(--space-2) var(--space-3);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: var(--text-xs);
    font-weight: 500;
    color: var(--color-text-secondary);
}

.connection:nth-child(1) { top: 0; left: 50%; transform: translateX(-50%); }
.connection:nth-child(2) { right: 0; top: 50%; transform: translateY(-50%); }
.connection:nth-child(3) { bottom: 0; left: 50%; transform: translateX(-50%); }
.connection:nth-child(4) { left: 0; top: 50%; transform: translateY(-50%); }

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

.values-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-6);
}

.value-item {
    padding: var(--space-6);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
}

.value-item h3 {
    font-size: var(--text-lg);
    font-weight: 600;
    margin-bottom: var(--space-3);
}

.value-item p {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    line-height: 1.7;
}

/* --------------------------------------------------------------------------
   Contact Page
   -------------------------------------------------------------------------- */
.contact-section {
    padding: var(--space-16) 0;
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 400px;
    gap: var(--space-12);
}

.form-header h2 {
    font-size: var(--text-2xl);
    font-weight: 700;
    margin-bottom: var(--space-2);
}

.form-header p {
    font-size: var(--text-base);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-8);
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: var(--space-5);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-5);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.form-group label {
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--color-text-secondary);
}

.form-group input,
.form-group select,
.form-group textarea {
    padding: var(--space-3) var(--space-4);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: var(--text-base);
    font-family: var(--font-primary);
    color: var(--color-text-primary);
    transition: border-color var(--transition-base);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--color-text-muted);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-accent-cyan);
}

.form-group select {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='%2394a3b8'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M19 9l-7 7-7-7'%3E%3C/path%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    background-size: 16px;
    padding-right: var(--space-10);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.checkbox-group {
    flex-direction: row;
    align-items: flex-start;
}

.checkbox-label {
    display: flex;
    align-items: flex-start;
    gap: var(--space-3);
    cursor: pointer;
}

.checkbox-label input {
    display: none;
}

.checkbox-custom {
    flex-shrink: 0;
    width: 20px;
    height: 20px;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    position: relative;
    transition: all var(--transition-base);
}

.checkbox-label input:checked + .checkbox-custom {
    background: var(--color-accent-cyan);
    border-color: var(--color-accent-cyan);
}

.checkbox-label input:checked + .checkbox-custom::after {
    content: '';
    position: absolute;
    top: 4px;
    left: 7px;
    width: 5px;
    height: 10px;
    border: solid #ffffff;
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
}

.checkbox-text {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    line-height: 1.5;
}

.btn-submit {
    align-self: flex-start;
    padding: var(--space-4) var(--space-8);
}

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

.contact-info {
    display: flex;
    flex-direction: column;
    gap: var(--space-6);
}

.info-card {
    padding: var(--space-6);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
}

.info-card h3 {
    font-size: var(--text-lg);
    font-weight: 600;
    margin-bottom: var(--space-3);
}

.info-card > p {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    line-height: 1.6;
    margin-bottom: var(--space-4);
}

.info-item {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.info-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(59, 130, 246, 0.1);
    border-radius: var(--radius-md);
    color: var(--color-accent-cyan);
}

.info-icon svg {
    width: 20px;
    height: 20px;
}

.info-label {
    display: block;
    font-size: var(--text-xs);
    color: var(--color-text-tertiary);
    margin-bottom: var(--space-1);
}

.info-value {
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--color-accent-cyan);
}

.social-links {
    display: flex;
    gap: var(--space-3);
}

.social-link {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-4);
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--color-text-secondary);
    transition: all var(--transition-base);
}

.social-link:hover {
    border-color: var(--color-accent-cyan);
    color: var(--color-accent-cyan);
}

.social-link svg {
    width: 18px;
    height: 18px;
}

.collaboration-types {
    padding: var(--space-16) 0;
    background: var(--color-bg-secondary);
}

.collab-types-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-6);
}

.collab-type-card {
    padding: var(--space-6);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    transition: all var(--transition-base);
}

.collab-type-card:hover {
    border-color: var(--color-border-accent);
    transform: translateY(-4px);
}

.collab-type-icon {
    width: 48px;
    height: 48px;
    margin-bottom: var(--space-4);
    color: var(--color-accent-cyan);
}

.collab-type-card h3 {
    font-size: var(--text-xl);
    font-weight: 600;
    margin-bottom: var(--space-3);
}

.collab-type-card > p {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-bottom: var(--space-4);
}

.collab-benefits {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.collab-benefits li {
    font-size: var(--text-sm);
    color: var(--color-text-tertiary);
    padding-left: var(--space-4);
    position: relative;
}

.collab-benefits li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 8px;
    width: 4px;
    height: 4px;
    background: var(--color-accent-cyan);
    border-radius: var(--radius-full);
}

.research-note {
    padding: var(--space-12) 0;
}

.note-content {
    display: flex;
    gap: var(--space-6);
    padding: var(--space-8);
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.06) 0%, rgba(96, 165, 250, 0.04) 100%);
    border: 1px solid rgba(59, 130, 246, 0.2);
    border-radius: var(--radius-xl);
}

.note-icon {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    color: var(--color-accent-cyan);
}

.note-text h3 {
    font-size: var(--text-lg);
    font-weight: 600;
    margin-bottom: var(--space-3);
}

.note-text p {
    font-size: var(--text-base);
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-bottom: var(--space-3);
}

.note-text p:last-child {
    margin-bottom: 0;
}

.faq-section {
    padding: var(--space-16) 0;
    background: var(--color-bg-secondary);
}

.faq-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-6);
}

.faq-item {
    padding: var(--space-6);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
}

.faq-item h4 {
    font-size: var(--text-base);
    font-weight: 600;
    margin-bottom: var(--space-3);
}

.faq-item p {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    line-height: 1.7;
}

/* --------------------------------------------------------------------------
   Responsive Design
   -------------------------------------------------------------------------- */
@media (max-width: 1024px) {
    .hero-visual {
        display: none;
    }

    .impact-grid,
    .tech-preview-grid,
    .about-grid,
    .approach-grid,
    .vision-grid,
    .collab-grid,
    .contact-grid,
    .use-case-grid {
        grid-template-columns: 1fr;
    }

    .tech-intro {
        grid-template-columns: 1fr;
    }

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

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

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

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

    .use-case-visual {
        position: static;
        order: -1;
        max-width: 400px;
    }

    .project-details-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    :root {
        --container-padding: var(--space-4);
    }

    .nav-links {
        position: fixed;
        top: 72px;
        left: 0;
        right: 0;
        background: rgba(255, 255, 255, 0.98);
        flex-direction: column;
        padding: var(--space-6);
        gap: var(--space-4);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition-base);
        border-bottom: 1px solid var(--color-border);
        box-shadow: var(--shadow-lg);
    }

    .nav-links.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }

    .nav-toggle {
        display: flex;
    }

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

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

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

    .hero {
        padding-top: 120px;
    }

    .hero-metrics {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--space-4);
    }

    .metric-divider {
        display: none;
    }

    .focus-grid,
    .projects-grid,
    .tech-cards-grid,
    .principles-grid,
    .what-grid,
    .values-grid,
    .collab-types-grid,
    .faq-grid {
        grid-template-columns: 1fr;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .overview-stats {
        flex-direction: column;
        gap: var(--space-4);
    }

    .filter-bar {
        flex-direction: column;
        align-items: flex-start;
    }

    .approach-principles,
    .vision-pillars {
        grid-template-columns: 1fr;
    }

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

    .footer-nav {
        grid-template-columns: 1fr;
        gap: var(--space-6);
    }

    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }

    .footer-legal {
        text-align: center;
    }

    .cta-buttons {
        flex-direction: column;
        width: 100%;
    }

    .cta-buttons .btn {
        width: 100%;
    }

    .tech-pillars {
        grid-template-columns: 1fr;
    }

    .approach-diagram,
    .partnership-model {
        display: none;
    }
}

@media (max-width: 480px) {
    .hero h1 {
        font-size: var(--text-3xl);
    }

    .page-header h1 {
        font-size: var(--text-2xl);
    }

    .section-header h2 {
        font-size: var(--text-2xl);
    }

    .project-detail {
        padding: var(--space-6);
    }

    .btn {
        padding: var(--space-3) var(--space-4);
        font-size: var(--text-sm);
    }
}

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

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

.status-indicator.active,
.status-indicator.research {
    animation: pulse 2s ease-in-out infinite;
}

/* Scroll animations - applied via JS */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.animate-on-scroll.visible {
    opacity: 1;
    transform: translateY(0);
}