/* ============================================
   QUANTUM AI ADVANCED MATERIALS ACADEMY
   Production Stylesheet
   ============================================ */

/* ------------------------------------------
   1. CSS CUSTOM PROPERTIES & DESIGN TOKENS
   ------------------------------------------ */
:root {
    /* Core Colors - Graphite & Teal Palette */
    --color-graphite-900: #0a0f14;
    --color-graphite-800: #111827;
    --color-graphite-700: #1a2332;
    --color-graphite-600: #243447;
    --color-graphite-500: #374a5f;
    
    /* Teal Accents */
    --color-teal-400: #2dd4bf;
    --color-teal-500: #14b8a6;
    --color-teal-600: #0d9488;
    
    /* Extended Palette */
    --color-cyan-400: #22d3ee;
    --color-violet-500: #8b5cf6;
    --color-amber-500: #f59e0b;
    
    /* Functional Colors */
    --color-text-primary: #f0f4f8;
    --color-text-secondary: #94a3b8;
    --color-text-muted: #64748b;
    
    /* Glassmorphism */
    --glass-bg: rgba(17, 24, 39, 0.7);
    --glass-bg-light: rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.08);
    --glass-border-light: rgba(255, 255, 255, 0.04);
    
    /* Gradients */
    --gradient-hero: linear-gradient(135deg, var(--color-graphite-900) 0%, #0d1f2d 50%, var(--color-graphite-800) 100%);
    --gradient-teal: linear-gradient(135deg, var(--color-teal-500), var(--color-cyan-400));
    --gradient-graphite: linear-gradient(180deg, var(--color-graphite-700), var(--color-graphite-800));
    
    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
    
    /* Spacing Scale */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
    --space-4xl: 6rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.75rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;
    
    /* Shadows */
    --shadow-glow: 0 0 40px rgba(45, 212, 191, 0.15);
    --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.3);
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Z-Index Scale */
    --z-base: 1;
    --z-nav: 100;
    --z-modal: 200;
    --z-tooltip: 300;
}

/* ------------------------------------------
   2. 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: 16px;
    line-height: 1.6;
    color: var(--color-text-primary);
    background-color: var(--color-graphite-900);
    overflow-x: hidden;
}

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

ul {
    list-style: none;
}

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

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

input, textarea, select {
    font-family: inherit;
    font-size: inherit;
}

/* Selection */
::selection {
    background: var(--color-teal-500);
    color: var(--color-graphite-900);
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--color-graphite-900);
}

::-webkit-scrollbar-thumb {
    background: var(--color-graphite-600);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--color-teal-600);
}

/* ------------------------------------------
   3. UTILITY CLASSES
   ------------------------------------------ */
.section-container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--space-xl);
}

.section-tag {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-teal-400);
    margin-bottom: var(--space-md);
}

.section-tag::before {
    content: '';
    width: 24px;
    height: 2px;
    background: var(--gradient-teal);
}

.section-title {
    font-size: clamp(1.75rem, 4vw, 2.75rem);
    font-weight: 700;
    line-height: 1.2;
    color: var(--color-text-primary);
    margin-bottom: var(--space-lg);
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--color-text-secondary);
    max-width: 600px;
}

/* ------------------------------------------
   4. NAVIGATION
   ------------------------------------------ */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: var(--z-nav);
    padding: var(--space-md) 0;
    transition: all var(--transition-base);
}

.navbar.scrolled {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--glass-border);
}

.nav-container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--space-xl);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-weight: 700;
    font-size: 1.25rem;
}

.logo-icon {
    width: 36px;
    height: 36px;
    color: var(--color-teal-400);
}

.logo-icon svg {
    width: 100%;
    height: 100%;
}

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

.logo-accent {
    color: var(--color-teal-400);
}

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

.nav-link {
    position: relative;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    transition: color var(--transition-base);
    padding: var(--space-sm) 0;
}

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

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

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

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

.hamburger-line {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-text-primary);
    transition: all var(--transition-base);
    transform-origin: center;
}

/* ------------------------------------------
   5. HERO SECTION
   ------------------------------------------ */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    background: var(--gradient-hero);
}

.hero-canvas-container {
    position: absolute;
    inset: 0;
    z-index: var(--z-base);
}

.hero-canvas-container canvas {
    width: 100%;
    height: 100%;
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse at center, transparent 0%, var(--color-graphite-900) 70%);
    z-index: 2;
}

.hero-content {
    position: relative;
    z-index: 3;
    max-width: 900px;
    text-align: center;
    padding: var(--space-4xl) var(--space-xl);
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-lg);
    background: var(--glass-bg-light);
    border: 1px solid var(--glass-border);
    border-radius: 100px;
    margin-bottom: var(--space-xl);
    animation: fadeInUp 0.8s ease 0.2s both;
}

.badge-dot {
    width: 8px;
    height: 8px;
    background: var(--color-teal-400);
    border-radius: 50%;
    animation: pulse 2s ease infinite;
}

.badge-text {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-teal-400);
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: var(--space-lg);
}

.title-line {
    display: block;
    animation: fadeInUp 0.8s ease both;
}

.title-line:nth-child(1) { animation-delay: 0.3s; }
.title-line:nth-child(2) { animation-delay: 0.5s; }
.title-line:nth-child(3) { animation-delay: 0.7s; }

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

.hero-subtitle {
    font-size: clamp(1rem, 2vw, 1.25rem);
    color: var(--color-text-secondary);
    max-width: 640px;
    margin: 0 auto var(--space-xl);
    line-height: 1.7;
    animation: fadeInUp 0.8s ease 0.9s both;
}

.hero-cta {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-md);
    margin-bottom: var(--space-3xl);
    animation: fadeInUp 0.8s ease 1.1s both;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-xl);
    font-size: 0.875rem;
    font-weight: 600;
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: var(--gradient-teal);
    color: var(--color-graphite-900);
    box-shadow: var(--shadow-glow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 60px rgba(45, 212, 191, 0.25);
}

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

.btn-secondary:hover {
    background: var(--glass-bg);
    border-color: var(--color-teal-500);
}

.btn-icon {
    width: 18px;
    height: 18px;
    transition: transform var(--transition-base);
}

.btn:hover .btn-icon {
    transform: translateX(4px);
}

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

/* Hero Stats */
.hero-stats {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-3xl);
    animation: fadeInUp 0.8s ease 1.3s both;
}

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

.stat-number {
    display: block;
    font-family: var(--font-mono);
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-teal-400);
    line-height: 1;
}

.stat-label {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-top: var(--space-sm);
}

/* Scroll Indicator */
.hero-scroll {
    position: absolute;
    bottom: var(--space-xl);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-md);
    z-index: 3;
    animation: fadeIn 1s ease 1.5s both;
}

.scroll-text {
    font-family: var(--font-mono);
    font-size: 0.625rem;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--color-text-muted);
}

.scroll-line {
    width: 1px;
    height: 40px;
    background: linear-gradient(to bottom, var(--color-teal-500), transparent);
    animation: scrollPulse 2s ease infinite;
}

/* ------------------------------------------
   6. ABOUT SECTION
   ------------------------------------------ */
.about {
    padding: var(--space-4xl) 0;
    background: var(--color-graphite-800);
    position: relative;
}

.about::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--color-teal-500), transparent);
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-4xl);
    align-items: center;
}

.about-text {
    color: var(--color-text-secondary);
    margin-bottom: var(--space-lg);
    line-height: 1.8;
}

.about-features {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
    margin-top: var(--space-xl);
}

.feature-item {
    display: flex;
    align-items: flex-start;
    gap: var(--space-md);
    padding: var(--space-lg);
    background: var(--glass-bg-light);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
}

.feature-item:hover {
    border-color: var(--color-teal-500);
    transform: translateX(8px);
}

.feature-icon {
    width: 40px;
    height: 40px;
    min-width: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-teal);
    border-radius: var(--radius-md);
    color: var(--color-graphite-900);
}

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

.feature-info h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--space-xs);
}

.feature-info p {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    line-height: 1.6;
}

/* About Visual */
.about-visual {
    position: relative;
}

.visual-card {
    position: relative;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-xl);
    padding: var(--space-xl);
    overflow: hidden;
}

.card-glow {
    position: absolute;
    top: -50%;
    right: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(45, 212, 191, 0.08) 0%, transparent 70%);
    animation: rotateGlow 20s linear infinite;
}

.visual-content {
    position: relative;
    z-index: 1;
}

.molecule-preview {
    width: 100%;
    height: 280px;
    background: var(--color-graphite-900);
    border-radius: var(--radius-lg);
    position: relative;
    overflow: hidden;
}

.visual-label {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    margin-top: var(--space-lg);
}

.label-tag {
    font-family: var(--font-mono);
    font-size: 0.625rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    padding: var(--space-xs) var(--space-sm);
    background: rgba(45, 212, 191, 0.15);
    color: var(--color-teal-400);
    border-radius: var(--radius-sm);
}

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

.floating-data {
    position: absolute;
    padding: var(--space-sm) var(--space-md);
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    backdrop-filter: blur(10px);
}

.floating-data:nth-child(2) {
    top: 10%;
    right: -20px;
    animation: floatData 6s ease-in-out infinite;
}

.floating-data:nth-child(3) {
    bottom: 15%;
    left: -30px;
    animation: floatData 6s ease-in-out 1s infinite reverse;
}

.data-value {
    display: block;
    font-family: var(--font-mono);
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--color-teal-400);
}

.data-label {
    font-size: 0.625rem;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* ------------------------------------------
   7. PROGRAMS SECTION
   ------------------------------------------ */
.programs {
    padding: var(--space-4xl) 0;
    background: var(--color-graphite-900);
}

.section-header {
    text-align: center;
    max-width: 640px;
    margin: 0 auto var(--space-3xl);
}

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

.program-card {
    position: relative;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-xl);
    overflow: hidden;
    transition: all var(--transition-base);
}

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

.card-accent {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--accent-color);
    opacity: 0.7;
    transition: opacity var(--transition-base);
}

.program-card:hover .card-accent {
    opacity: 1;
}

.card-content {
    padding: var(--space-2xl);
}

.program-icon {
    width: 56px;
    height: 56px;
    color: var(--accent-color);
    margin-bottom: var(--space-lg);
}

.program-icon svg {
    width: 100%;
    height: 100%;
}

.program-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--space-md);
}

.program-desc {
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-bottom: var(--space-lg);
}

.program-topics {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
    margin-bottom: var(--space-xl);
}

.program-topics li {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

.program-topics li::before {
    content: '';
    width: 6px;
    height: 6px;
    background: var(--accent-color);
    border-radius: 50%;
    opacity: 0.7;
}

.program-meta {
    display: flex;
    align-items: center;
    gap: var(--space-xl);
    padding-top: var(--space-lg);
    border-top: 1px solid var(--glass-border);
}

.meta-item {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

.meta-item svg {
    width: 16px;
    height: 16px;
}

.card-hover-effect {
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at var(--mouse-x, 50%) var(--mouse-y, 50%), rgba(45, 212, 191, 0.08) 0%, transparent 50%);
    opacity: 0;
    transition: opacity var(--transition-base);
    pointer-events: none;
}

.program-card:hover .card-hover-effect {
    opacity: 1;
}

/* ------------------------------------------
   8. MATERIALS LAB SECTION
   ------------------------------------------ */
.materials-lab {
    padding: var(--space-4xl) 0;
    background: var(--color-graphite-800);
    position: relative;
}

.materials-lab::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--color-cyan-400), transparent);
}

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

.project-card {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-xl);
    overflow: hidden;
    transition: all var(--transition-base);
}

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

.project-image {
    position: relative;
    height: 220px;
    overflow: hidden;
}

.project-visual {
    width: 100%;
    height: 100%;
    position: relative;
}

.project-overlay {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: flex-end;
    justify-content: flex-end;
    padding: var(--space-md);
    background: linear-gradient(to top, rgba(10, 15, 20, 0.8), transparent);
}

.project-status {
    font-family: var(--font-mono);
    font-size: 0.625rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    padding: var(--space-xs) var(--space-sm);
    background: rgba(45, 212, 191, 0.15);
    color: var(--color-teal-400);
    border-radius: var(--radius-sm);
}

.project-info {
    padding: var(--space-xl);
}

.project-tag {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 0.625rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    padding: var(--space-xs) var(--space-sm);
    background: rgba(139, 92, 246, 0.15);
    color: var(--color-violet-500);
    border-radius: var(--radius-sm);
    margin-bottom: var(--space-sm);
}

.project-title {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: var(--space-sm);
}

.project-desc {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    line-height: 1.6;
    margin-bottom: var(--space-lg);
}

.project-author {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding-top: var(--space-md);
    border-top: 1px solid var(--glass-border);
}

.author-avatar {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-teal);
    color: var(--color-graphite-900);
    font-size: 0.75rem;
    font-weight: 700;
    border-radius: 50%;
}

.author-info {
    display: flex;
    flex-direction: column;
}

.author-name {
    font-size: 0.875rem;
    font-weight: 500;
}

.author-cohort {
    font-size: 0.75rem;
    color: var(--color-text-muted);
}

/* ------------------------------------------
   9. CONTACT SECTION
   ------------------------------------------ */
.contact {
    padding: var(--space-4xl) 0;
    background: var(--color-graphite-900);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-4xl);
    align-items: start;
}

.contact-text {
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-bottom: var(--space-xl);
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
    margin-bottom: var(--space-xl);
}

.contact-item {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-md);
    background: var(--glass-bg-light);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
}

.contact-item:hover {
    border-color: var(--color-teal-500);
    transform: translateX(8px);
}

.contact-icon {
    width: 44px;
    height: 44px;
    min-width: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-teal);
    border-radius: var(--radius-md);
    color: var(--color-graphite-900);
}

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

.contact-detail {
    display: flex;
    flex-direction: column;
}

.detail-label {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.detail-value {
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--color-text-primary);
}

.contact-social {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.social-link {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--glass-bg-light);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    color: var(--color-text-secondary);
    transition: all var(--transition-base);
}

.social-link:hover {
    color: var(--color-teal-400);
    border-color: var(--color-teal-500);
    transform: translateY(-4px);
}

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

/* Contact Form */
.contact-form-container {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-xl);
    padding: var(--space-2xl);
}

.form-header {
    margin-bottom: var(--space-xl);
}

.form-header h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--space-xs);
}

.form-header p {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
}

.form-group {
    margin-bottom: var(--space-lg);
}

.form-group label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: var(--space-sm);
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: var(--space-md) var(--space-lg);
    background: var(--color-graphite-800);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    color: var(--color-text-primary);
    font-size: 0.9375rem;
    transition: all var(--transition-base);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--color-teal-500);
    box-shadow: 0 0 0 3px rgba(45, 212, 191, 0.1);
}

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

.form-group select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%2364748b' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 16px center;
}

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}

/* ------------------------------------------
   10. FOOTER
   ------------------------------------------ */
.footer {
    padding: var(--space-4xl) 0 var(--space-xl);
    background: var(--color-graphite-900);
    border-top: 1px solid var(--glass-border);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: var(--space-3xl);
    margin-bottom: var(--space-3xl);
}

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

.footer-tagline {
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
    line-height: 1.7;
    max-width: 280px;
}

.footer-nav h4 {
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--space-lg);
}

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

.footer-nav a {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    transition: color var(--transition-base);
}

.footer-nav a:hover {
    color: var(--color-teal-400);
}

.footer-newsletter h4 {
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--space-sm);
}

.footer-newsletter p {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--space-md);
}

.newsletter-form {
    display: flex;
    gap: var(--space-sm);
}

.newsletter-form input {
    flex: 1;
    padding: var(--space-sm) var(--space-md);
    background: var(--color-graphite-800);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    color: var(--color-text-primary);
    font-size: 0.875rem;
}

.newsletter-form input:focus {
    outline: none;
    border-color: var(--color-teal-500);
}

.newsletter-form button {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-teal);
    border-radius: var(--radius-md);
    color: var(--color-graphite-900);
    transition: all var(--transition-base);
}

.newsletter-form button:hover {
    transform: scale(1.05);
}

.newsletter-form button svg {
    width: 18px;
    height: 18px;
}

.footer-bottom {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: var(--space-xl);
    border-top: 1px solid var(--glass-border);
}

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

.footer-legal {
    display: flex;
    align-items: center;
    gap: var(--space-xl);
}

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

.footer-legal a:hover {
    color: var(--color-teal-400);
}

/* ------------------------------------------
   11. ANIMATIONS
   ------------------------------------------ */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

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

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

@keyframes scrollPulse {
    0%, 100% { transform: scaleY(1); opacity: 1; }
    50% { transform: scaleY(0.5); opacity: 0.5; }
}

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

@keyframes rotateGlow {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

/* ------------------------------------------
   12. RESPONSIVE DESIGN
   ------------------------------------------ */
@media (max-width: 1024px) {
    .about-grid,
    .contact-grid {
        grid-template-columns: 1fr;
        gap: var(--space-3xl);
    }
    
    .programs-grid {
        grid-template-columns: 1fr;
    }
    
    .projects-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .nav-toggle {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        max-width: 320px;
        height: 100vh;
        flex-direction: column;
        align-items: flex-start;
        padding: var(--space-4xl) var(--space-xl);
        background: var(--glass-bg);
        backdrop-filter: blur(20px);
        border-left: 1px solid var(--glass-border);
        transition: right var(--transition-base);
    }
    
    .nav-menu.active {
        right: 0;
    }
    
    .nav-link {
        font-size: 1.125rem;
        padding: var(--space-md) 0;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: var(--space-xl);
    }
    
    .hero-cta {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
        justify-content: center;
    }
    
    .projects-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: var(--space-md);
        text-align: center;
    }
    
    .floating-data {
        display: none;
    }
}

@media (max-width: 480px) {
    :root {
        --space-xl: 1rem;
        --space-2xl: 1.5rem;
        --space-3xl: 2rem;
        --space-4xl: 3rem;
    }
    
    .section-container {
        padding: 0 var(--space-md);
    }
    
    .nav-container {
        padding: 0 var(--space-md);
    }
    
    .hero-content {
        padding: var(--space-2xl) var(--space-md);
    }
    
    .program-meta {
        flex-direction: column;
        gap: var(--space-sm);
    }
}