/* ============================================
   INFINITY AI HYDROGEN ENERGY ACADEMY
   Main Stylesheet
   ============================================ */

/* ============================================
   1. CSS CUSTOM PROPERTIES (Design Tokens)
   ============================================ */
:root {
    /* Color Palette - Futuristic HydrogenTech */
    --color-primary: #00d4ff;
    --color-primary-dark: #0099cc;
    --color-secondary: #0066ff;
    --color-accent: #00f0ff;
    --color-glow: rgba(0, 212, 255, 0.4);
    
    /* Neutral Scale */
    --color-white: #ffffff;
    --color-gray-50: #f8fafc;
    --color-gray-100: #f1f5f9;
    --color-gray-200: #e2e8f0;
    --color-gray-300: #cbd5e1;
    --color-gray-400: #94a3b8;
    --color-gray-500: #64748b;
    --color-gray-600: #475569;
    --color-gray-700: #334155;
    --color-gray-800: #1e293b;
    --color-gray-900: #0f172a;
    --color-black: #020617;
    
    /* Gradients */
    --gradient-hero: linear-gradient(135deg, #0f172a 0%, #1e3a5f 50%, #0f172a 100%);
    --gradient-cyan: linear-gradient(135deg, #00d4ff 0%, #0066ff 100%);
    --gradient-glass: linear-gradient(135deg, rgba(255,255,255,0.1) 0%, rgba(255,255,255,0.05) 100%);
    
    /* Typography */
    --font-display: 'Orbitron', sans-serif;
    --font-heading: 'Rajdhani', sans-serif;
    --font-body: 'Inter', sans-serif;
    
    /* 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;
    --text-7xl: 4.5rem;
    
    /* 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;
    
    /* Layout */
    --container-max: 1280px;
    --container-padding: var(--space-6);
    
    /* Effects */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 350ms ease;
    --transition-bounce: 500ms cubic-bezier(0.68, -0.55, 0.265, 1.55);
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1);
    --shadow-glow: 0 0 20px var(--color-glow);
    --shadow-glow-lg: 0 0 40px var(--color-glow), 0 0 80px rgba(0, 102, 255, 0.2);
}

/* ============================================
   2. RESET & BASE STYLES
   ============================================ */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    font-family: var(--font-body);
    font-size: var(--text-base);
    line-height: 1.6;
    color: var(--color-gray-200);
    background-color: var(--color-black);
    overflow-x: hidden;
}

/* Selection styling */
::selection {
    background: var(--color-primary);
    color: var(--color-black);
}

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

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

::-webkit-scrollbar-thumb {
    background: var(--gradient-cyan);
    border-radius: var(--radius-full);
}

/* ============================================
   3. UTILITY CLASSES
   ============================================ */
.gradient-text {
    background: var(--gradient-cyan);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.glass-card {
    background: var(--gradient-glass);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-xl);
}

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

/* ============================================
   4. ANIMATED BACKGROUND CANVAS
   ============================================ */
#energy-network {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
}

/* ============================================
   5. NAVIGATION
   ============================================ */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: var(--space-4) 0;
    transition: all var(--transition-base);
}

.navbar.scrolled {
    background: rgba(2, 6, 23, 0.9);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    padding: var(--space-3) 0;
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
}

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

.nav-logo {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    text-decoration: none;
    color: var(--color-white);
}

.logo-icon {
    font-family: var(--font-display);
    font-size: var(--text-2xl);
    font-weight: 800;
    color: var(--color-primary);
    line-height: 1;
}

.logo-text {
    font-family: var(--font-display);
    font-size: var(--text-lg);
    font-weight: 600;
    letter-spacing: -0.02em;
}

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

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

.hamburger-line {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-white);
    transition: all var(--transition-base);
    border-radius: var(--radius-full);
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: var(--space-1);
    list-style: none;
}

.nav-link {
    display: block;
    padding: var(--space-2) var(--space-4);
    color: var(--color-gray-300);
    text-decoration: none;
    font-family: var(--font-heading);
    font-weight: 500;
    font-size: var(--text-sm);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--gradient-cyan);
    transition: all var(--transition-base);
    transform: translateX(-50%);
}

.nav-link:hover,
.nav-link:focus {
    color: var(--color-white);
}

.nav-link:hover::after,
.nav-link:focus::after {
    width: 60%;
}

.nav-cta {
    background: var(--gradient-cyan);
    color: var(--color-black) !important;
    font-weight: 600;
}

.nav-cta::after {
    display: none;
}

.nav-cta:hover,
.nav-cta:focus {
    box-shadow: var(--shadow-glow);
    transform: translateY(-2px);
}

/* ============================================
   6. HERO SECTION
   ============================================ */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: calc(var(--space-24) + 60px) 0 var(--space-24);
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--gradient-hero);
    z-index: -1;
}

.hero-content {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
    width: 100%;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-16);
    align-items: center;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    background: rgba(0, 212, 255, 0.1);
    border: 1px solid rgba(0, 212, 255, 0.2);
    border-radius: var(--radius-full);
    padding: var(--space-2) var(--space-4);
    margin-bottom: var(--space-6);
    font-size: var(--text-sm);
    font-family: var(--font-heading);
}

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

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(1.2); }
}

.hero-title {
    font-family: var(--font-display);
    font-size: var(--text-5xl);
    font-weight: 800;
    line-height: 1.1;
    color: var(--color-white);
    margin-bottom: var(--space-6);
    letter-spacing: -0.02em;
}

.hero-subtitle {
    font-size: var(--text-lg);
    color: var(--color-gray-400);
    max-width: 520px;
    margin-bottom: var(--space-8);
    line-height: 1.7;
}

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

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-4) var(--space-8);
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: var(--text-base);
    text-decoration: none;
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
    cursor: pointer;
    border: none;
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: var(--gradient-cyan);
    color: var(--color-black);
}

.btn-primary:hover {
    box-shadow: var(--shadow-glow-lg);
    transform: translateY(-3px);
}

.btn-secondary {
    background: transparent;
    color: var(--color-white);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.3);
}

.btn-icon {
    transition: transform var(--transition-base);
}

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

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

.btn-loader {
    width: 20px;
    height: 20px;
    border: 2px solid transparent;
    border-top-color: currentColor;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Hero Stats */
.hero-stats {
    display: flex;
    gap: var(--space-8);
    flex-wrap: wrap;
}

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

.stat-number {
    font-family: var(--font-display);
    font-size: var(--text-3xl);
    font-weight: 700;
    color: var(--color-primary);
    line-height: 1;
}

.stat-label {
    font-size: var(--text-sm);
    color: var(--color-gray-500);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Hero Visual - Hologram */
.hero-visual {
    display: flex;
    align-items: center;
    justify-content: center;
}

.hologram-container {
    position: relative;
    width: 400px;
    height: 400px;
}

.hologram-ring {
    position: absolute;
    border: 2px solid rgba(0, 212, 255, 0.2);
    border-radius: 50%;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.ring-1 {
    width: 300px;
    height: 300px;
    animation: rotate 20s linear infinite;
}

.ring-2 {
    width: 240px;
    height: 240px;
    animation: rotate 15s linear infinite reverse;
}

.ring-3 {
    width: 180px;
    height: 180px;
    animation: rotate 10s linear infinite;
}

@keyframes rotate {
    from { transform: translate(-50%, -50%) rotate(0deg); }
    to { transform: translate(-50%, -50%) rotate(360deg); }
}

.hologram-core {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 120px;
    height: 120px;
    background: radial-gradient(circle, rgba(0, 212, 255, 0.3) 0%, transparent 70%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    animation: pulse-glow 3s ease-in-out infinite;
}

@keyframes pulse-glow {
    0%, 100% { box-shadow: 0 0 20px rgba(0, 212, 255, 0.3); }
    50% { box-shadow: 0 0 60px rgba(0, 212, 255, 0.6), 0 0 100px rgba(0, 102, 255, 0.2); }
}

.core-symbol {
    font-family: var(--font-display);
    font-size: var(--text-3xl);
    font-weight: 700;
    color: var(--color-primary);
    text-shadow: 0 0 20px var(--color-glow);
}

.hologram-particles {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.particle {
    position: absolute;
    width: 4px;
    height: 4px;
    background: var(--color-primary);
    border-radius: 50%;
    opacity: 0.6;
}

.p1 { top: 20%; left: 30%; animation: float 6s ease-in-out infinite; }
.p2 { top: 60%; left: 70%; animation: float 8s ease-in-out infinite 1s; }
.p3 { top: 40%; left: 80%; animation: float 7s ease-in-out infinite 2s; }
.p4 { top: 80%; left: 20%; animation: float 9s ease-in-out infinite 0.5s; }
.p5 { top: 30%; left: 60%; animation: float 5s ease-in-out infinite 1.5s; }
.p6 { top: 70%; left: 40%; animation: float 10s ease-in-out infinite 3s; }

@keyframes float {
    0%, 100% { transform: translateY(0) scale(1); opacity: 0.6; }
    50% { transform: translateY(-30px) scale(1.5); opacity: 1; }
}

/* Scroll Indicator */
.scroll-indicator {
    position: absolute;
    bottom: var(--space-8);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-2);
    opacity: 0.6;
}

.scroll-text {
    font-size: var(--text-xs);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-gray-500);
}

.scroll-line {
    width: 1px;
    height: 40px;
    background: linear-gradient(to bottom, var(--color-primary), transparent);
    position: relative;
    overflow: hidden;
}

.scroll-dot {
    width: 3px;
    height: 8px;
    background: var(--color-primary);
    border-radius: var(--radius-full);
    position: absolute;
    left: -1px;
    animation: scroll-bounce 2s ease-in-out infinite;
}

@keyframes scroll-bounce {
    0%, 100% { top: 0; }
    50% { top: 32px; }
}

/* ============================================
   7. SECTION COMMON STYLES
   ============================================ */
section {
    position: relative;
    z-index: 1;
}

.section-header {
    text-align: center;
    max-width: 640px;
    margin: 0 auto var(--space-16);
}

.section-header.left-aligned {
    text-align: left;
    margin-left: 0;
    margin-right: 0;
}

.section-tag {
    display: inline-block;
    font-family: var(--font-heading);
    font-size: var(--text-sm);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-primary);
    margin-bottom: var(--space-3);
    padding: var(--space-1) var(--space-3);
    background: rgba(0, 212, 255, 0.1);
    border-radius: var(--radius-sm);
}

.section-title {
    font-family: var(--font-display);
    font-size: var(--text-4xl);
    font-weight: 700;
    color: var(--color-white);
    line-height: 1.2;
    margin-bottom: var(--space-4);
}

.section-subtitle {
    font-size: var(--text-lg);
    color: var(--color-gray-500);
    line-height: 1.7;
}

/* ============================================
   8. ABOUT SECTION
   ============================================ */
.about {
    padding: var(--space-24) 0;
    background: linear-gradient(to bottom, var(--color-black), var(--color-gray-900));
}

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

.about-card {
    padding: var(--space-8);
    transition: all var(--transition-base);
}

.about-card:hover {
    transform: translateY(-8px);
    border-color: rgba(0, 212, 255, 0.3);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3), var(--shadow-glow);
}

.card-icon {
    width: 64px;
    height: 64px;
    margin-bottom: var(--space-6);
}

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

.card-title {
    font-family: var(--font-heading);
    font-size: var(--text-xl);
    font-weight: 600;
    color: var(--color-white);
    margin-bottom: var(--space-3);
}

.card-text {
    color: var(--color-gray-500);
    line-height: 1.7;
    font-size: var(--text-sm);
}

.about-image {
    grid-column: span 3;
    position: relative;
    border-radius: var(--radius-xl);
    overflow: hidden;
    margin-top: var(--space-6);
}

.about-image img {
    width: 100%;
    height: 400px;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.about-image:hover img {
    transform: scale(1.05);
}

.image-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: var(--space-8);
    background: linear-gradient(to top, rgba(2, 6, 23, 0.9), transparent);
}

.overlay-text {
    font-family: var(--font-heading);
    font-size: var(--text-lg);
    font-weight: 600;
    color: var(--color-white);
}

/* ============================================
   9. PROGRAMS SECTION
   ============================================ */
.programs {
    padding: var(--space-24) 0;
    background: var(--color-black);
}

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

.program-card {
    display: grid;
    grid-template-columns: 200px 1fr;
    background: var(--gradient-glass);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-xl);
    overflow: hidden;
    transition: all var(--transition-base);
}

.program-card:hover {
    border-color: rgba(0, 212, 255, 0.2);
    transform: translateY(-4px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
}

.program-visual {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.05) 0%, rgba(0, 102, 255, 0.05) 100%);
    overflow: hidden;
}

.program-icon {
    width: 80px;
    height: 80px;
    z-index: 1;
}

.program-glow {
    position: absolute;
    width: 150px;
    height: 150px;
    background: radial-gradient(circle, rgba(0, 212, 255, 0.15) 0%, transparent 70%);
    border-radius: 50%;
    animation: pulse-glow 4s ease-in-out infinite;
}

.program-content {
    padding: var(--space-6);
    display: flex;
    flex-direction: column;
}

.program-number {
    font-family: var(--font-display);
    font-size: var(--text-sm);
    font-weight: 700;
    color: var(--color-primary);
    opacity: 0.6;
    margin-bottom: var(--space-2);
}

.program-title {
    font-family: var(--font-heading);
    font-size: var(--text-xl);
    font-weight: 600;
    color: var(--color-white);
    margin-bottom: var(--space-3);
}

.program-desc {
    color: var(--color-gray-500);
    font-size: var(--text-sm);
    line-height: 1.7;
    margin-bottom: var(--space-4);
}

.program-features {
    list-style: none;
    margin-bottom: var(--space-4);
}

.program-features li {
    position: relative;
    padding-left: var(--space-5);
    margin-bottom: var(--space-2);
    font-size: var(--text-sm);
    color: var(--color-gray-400);
}

.program-features li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--color-primary);
    font-weight: 600;
}

.program-meta {
    display: flex;
    gap: var(--space-3);
    margin-top: auto;
    margin-bottom: var(--space-4);
}

.meta-item {
    font-size: var(--text-xs);
    font-weight: 500;
    color: var(--color-primary);
    background: rgba(0, 212, 255, 0.1);
    padding: var(--space-1) var(--space-3);
    border-radius: var(--radius-sm);
}

.program-link {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    color: var(--color-primary);
    text-decoration: none;
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: var(--text-sm);
    transition: all var(--transition-fast);
}

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

/* ============================================
   10. HYDROGEN LAB SECTION
   ============================================ */
.lab {
    padding: var(--space-24) 0;
    background: linear-gradient(to bottom, var(--color-gray-900), var(--color-black));
}

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

.project-card {
    background: var(--gradient-glass);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-xl);
    overflow: hidden;
    transition: all var(--transition-base);
}

.project-card:hover {
    transform: translateY(-8px);
    border-color: rgba(0, 212, 255, 0.2);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4), var(--shadow-glow);
}

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

.project-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.project-card:hover .project-image img {
    transform: scale(1.1);
}

.project-status {
    position: absolute;
    top: var(--space-3);
    right: var(--space-3);
}

.status-badge {
    display: inline-block;
    padding: var(--space-1) var(--space-3);
    border-radius: var(--radius-sm);
    font-size: var(--text-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.status-badge.active {
    background: rgba(0, 212, 255, 0.2);
    color: var(--color-primary);
}

.status-badge.completed {
    background: rgba(34, 197, 94, 0.2);
    color: #22c55e;
}

.status-badge.prototype {
    background: rgba(234, 179, 8, 0.2);
    color: #eab308;
}

.status-badge.research {
    background: rgba(168, 85, 247, 0.2);
    color: #a855f7;
}

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

.project-category {
    display: inline-block;
    font-size: var(--text-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-primary);
    margin-bottom: var(--space-2);
}

.project-title {
    font-family: var(--font-heading);
    font-size: var(--text-lg);
    font-weight: 600;
    color: var(--color-white);
    margin-bottom: var(--space-3);
    line-height: 1.4;
}

.project-desc {
    color: var(--color-gray-500);
    font-size: var(--text-sm);
    line-height: 1.7;
    margin-bottom: var(--space-4);
}

.project-team {
    margin-bottom: var(--space-4);
}

.team-label {
    font-size: var(--text-xs);
    color: var(--color-gray-600);
    font-style: italic;
}

.project-metrics {
    display: flex;
    gap: var(--space-6);
    padding-top: var(--space-4);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

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

.metric-value {
    font-family: var(--font-display);
    font-size: var(--text-xl);
    font-weight: 700;
    color: var(--color-primary);
    line-height: 1;
}

.metric-name {
    font-size: var(--text-xs);
    color: var(--color-gray-600);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* ============================================
   11. CONTACT SECTION
   ============================================ */
.contact {
    padding: var(--space-24) 0;
    background: var(--color-black);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: var(--space-16);
    align-items: start;
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: var(--space-6);
    margin-top: var(--space-8);
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: var(--space-4);
}

.contact-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 212, 255, 0.1);
    border-radius: var(--radius-lg);
    flex-shrink: 0;
}

.contact-icon svg {
    width: 24px;
    height: 24px;
    color: var(--color-primary);
}

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

.contact-label {
    font-size: var(--text-sm);
    color: var(--color-gray-500);
}

.contact-value {
    font-family: var(--font-heading);
    font-size: var(--text-lg);
    font-weight: 600;
    color: var(--color-white);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.contact-value:hover {
    color: var(--color-primary);
}

.social-links {
    display: flex;
    gap: var(--space-3);
    margin-top: var(--space-8);
}

.social-link {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    color: var(--color-gray-400);
    transition: all var(--transition-base);
}

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

.social-link:hover {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: var(--color-black);
    transform: translateY(-3px);
}

/* Contact Form */
.contact-form-wrapper {
    padding: 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-label {
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--color-gray-300);
}

.form-input,
.form-select,
.form-textarea {
    padding: var(--space-3) var(--space-4);
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    color: var(--color-white);
    font-family: var(--font-body);
    font-size: var(--text-base);
    transition: all var(--transition-fast);
}

.form-input::placeholder,
.form-textarea::placeholder {
    color: var(--color-gray-600);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.1);
}

.form-select {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' fill='%2394a3b8' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10l-5 5z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
}

.form-select option {
    background: var(--color-gray-900);
    color: var(--color-white);
}

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

.form-status {
    padding: var(--space-4);
    border-radius: var(--radius-lg);
    font-size: var(--text-sm);
    text-align: center;
}

.form-status.success {
    background: rgba(34, 197, 94, 0.1);
    color: #22c55e;
    border: 1px solid rgba(34, 197, 94, 0.2);
}

.form-status.error {
    background: rgba(239, 68, 68, 0.1);
    color: #ef4444;
    border: 1px solid rgba(239, 68, 68, 0.2);
}

/* ============================================
   12. FOOTER
   ============================================ */
.footer {
    padding: var(--space-16) 0 var(--space-8);
    background: var(--color-gray-900);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: var(--space-12);
    margin-bottom: var(--space-12);
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    text-decoration: none;
    color: var(--color-white);
    margin-bottom: var(--space-4);
}

.footer-tagline {
    color: var(--color-gray-500);
    font-size: var(--text-sm);
    line-height: 1.7;
    max-width: 300px;
}

.footer-title {
    font-family: var(--font-heading);
    font-size: var(--text-sm);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-white);
    margin-bottom: var(--space-4);
}

.footer-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.footer-list a {
    color: var(--color-gray-500);
    text-decoration: none;
    font-size: var(--text-sm);
    transition: color var(--transition-fast);
}

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

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--space-8);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.copyright,
.location {
    font-size: var(--text-sm);
    color: var(--color-gray-600);
}

/* ============================================
   13. RESPONSIVE DESIGN
   ============================================ */

/* Tablet (768px - 1023px) */
@media (max-width: 1023px) {
    :root {
        --text-5xl: 2.5rem;
        --text-4xl: 2rem;
        --text-3xl: 1.5rem;
    }
    
    .hero-content {
        grid-template-columns: 1fr;
        gap: var(--space-12);
        text-align: center;
    }
    
    .hero-subtitle {
        margin-left: auto;
        margin-right: auto;
    }
    
    .hero-cta {
        justify-content: center;
    }
    
    .hero-stats {
        justify-content: center;
    }
    
    .hero-visual {
        order: -1;
    }
    
    .hologram-container {
        width: 300px;
        height: 300px;
    }
    
    .about-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .about-image {
        grid-column: span 2;
    }
    
    .programs-grid {
        grid-template-columns: 1fr;
    }
    
    .program-card {
        grid-template-columns: 160px 1fr;
    }
    
    .lab-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
        gap: var(--space-12);
    }
    
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Mobile (< 768px) */
@media (max-width: 767px) {
    :root {
        --container-padding: var(--space-4);
        --text-5xl: 2rem;
        --text-4xl: 1.75rem;
        --text-3xl: 1.25rem;
        --space-24: 4rem;
        --space-16: 3rem;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        max-width: 320px;
        height: 100vh;
        background: rgba(2, 6, 23, 0.98);
        backdrop-filter: blur(20px);
        flex-direction: column;
        padding: calc(var(--space-16) + 60px) var(--space-6) var(--space-6);
        gap: var(--space-2);
        transition: right var(--transition-slow);
    }
    
    .nav-menu.active {
        right: 0;
    }
    
    .nav-link {
        padding: var(--space-3) var(--space-4);
        font-size: var(--text-base);
    }
    
    .hamburger-line {
        transition: all var(--transition-base);
    }
    
    .nav-toggle.active .hamburger-line:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    
    .nav-toggle.active .hamburger-line:nth-child(2) {
        opacity: 0;
    }
    
    .nav-toggle.active .hamburger-line:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -6px);
    }
    
    .hero {
        min-height: auto;
        padding-top: calc(var(--space-16) + 80px);
    }
    
    .hologram-container {
        width: 240px;
        height: 240px;
    }
    
    .ring-1 { width: 200px; height: 200px; }
    .ring-2 { width: 160px; height: 160px; }
    .ring-3 { width: 120px; height: 120px; }
    .hologram-core { width: 80px; height: 80px; }
    .core-symbol { font-size: var(--text-xl); }
    
    .about-grid {
        grid-template-columns: 1fr;
    }
    
    .about-image {
        grid-column: span 1;
    }
    
    .program-card {
        grid-template-columns: 1fr;
    }
    
    .program-visual {
        height: 160px;
    }
    
    .lab-grid {
        grid-template-columns: 1fr;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        gap: var(--space-8);
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: var(--space-2);
        text-align: center;
    }
}

/* Reduced motion preference */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    html {
        scroll-behavior: auto;
    }
}

/* ============================================
   14. ACCESSIBILITY
   ============================================ */
:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

/* Skip link for keyboard users */
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--color-primary);
    color: var(--color-black);
    padding: var(--space-2) var(--space-4);
    z-index: 10000;
    transition: top var(--transition-fast);
}

.skip-link:focus {
    top: 0;
}