/* ============================================
   INFINITY AI DIGITAL TWIN ACADEMY
   Main Stylesheet
   ============================================ */

/* ------------------------------------------
   1. CSS CUSTOM PROPERTIES (Design Tokens)
   ------------------------------------------ */
:root {
    /* Color Palette - Dark Graphite with Electric Blue */
    --color-bg-primary: #0a0e1a;
    --color-bg-secondary: #111827;
    --color-bg-tertiary: #1a1f2e;
    --color-bg-glass: rgba(17, 24, 39, 0.7);
    --color-bg-glass-light: rgba(255, 255, 255, 0.05);
    
    --color-text-primary: #f0f4ff;
    --color-text-secondary: #94a3b8;
    --color-text-muted: #64748b;
    
    --color-accent-blue: #00d4ff;
    --color-accent-blue-dark: #0099cc;
    --color-accent-cyan: #00f5d4;
    --color-accent-purple: #a855f7;
    
    --color-border-glass: rgba(255, 255, 255, 0.08);
    --color-border-glass-hover: rgba(0, 212, 255, 0.3);
    
    /* Gradients */
    --gradient-hero: linear-gradient(135deg, #0a0e1a 0%, #1a1f2e 50%, #0f172a 100%);
    --gradient-accent: linear-gradient(135deg, #00d4ff 0%, #00f5d4 100%);
    --gradient-card: linear-gradient(180deg, rgba(255,255,255,0.05) 0%, rgba(255,255,255,0.01) 100%);
    
    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
    
    --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;
    
    /* Animation */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 400ms ease;
    --transition-slower: 600ms ease;
    
    /* Shadows */
    --shadow-glow-blue: 0 0 20px rgba(0, 212, 255, 0.3);
    --shadow-glow-cyan: 0 0 30px rgba(0, 245, 212, 0.2);
    --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.3);
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;
}

/* ------------------------------------------
   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-primary);
    font-size: var(--text-base);
    line-height: 1.6;
    color: var(--color-text-primary);
    background: var(--color-bg-primary);
    overflow-x: hidden;
}

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

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

ul, ol {
    list-style: none;
}

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

input, textarea, select {
    font: inherit;
    color: inherit;
}

/* ------------------------------------------
   3. UTILITY CLASSES
   ------------------------------------------ */
.container {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--space-6);
}

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

.glass-card {
    background: var(--color-bg-glass);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--color-border-glass);
    border-radius: var(--radius-xl);
    transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

.glass-card:hover {
    border-color: var(--color-border-glass-hover);
    box-shadow: var(--shadow-glow-blue);
}

/* ------------------------------------------
   4. BUTTONS
   ------------------------------------------ */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-4) var(--space-6);
    border-radius: var(--radius-lg);
    font-size: var(--text-sm);
    font-weight: 600;
    letter-spacing: 0.025em;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: var(--gradient-accent);
    color: var(--color-bg-primary);
    box-shadow: var(--shadow-glow-cyan);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(0, 245, 212, 0.4);
}

.btn-primary .btn-arrow {
    width: 16px;
    height: 16px;
    transition: transform var(--transition-base);
}

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

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

.btn-glass:hover {
    border-color: var(--color-border-glass-hover);
    background: rgba(0, 212, 255, 0.1);
}

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

/* ------------------------------------------
   5. SECTION HEADER
   ------------------------------------------ */
.section-header {
    text-align: center;
    margin-bottom: var(--space-16);
}

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

.section-tag {
    display: inline-block;
    padding: var(--space-2) var(--space-4);
    background: rgba(0, 212, 255, 0.1);
    border: 1px solid rgba(0, 212, 255, 0.2);
    border-radius: var(--radius-full);
    font-size: var(--text-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-accent-blue);
    margin-bottom: var(--space-4);
}

.section-title {
    font-size: var(--text-4xl);
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.02em;
}

/* ------------------------------------------
   6. NAVIGATION
   ------------------------------------------ */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: var(--space-4) 0;
    transition: background var(--transition-base), backdrop-filter var(--transition-base);
}

.navbar.scrolled {
    background: rgba(10, 14, 26, 0.9);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-border-glass);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--space-6);
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    font-weight: 700;
    font-size: var(--text-lg);
}

.logo-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: var(--gradient-accent);
    border-radius: var(--radius-lg);
    color: var(--color-bg-primary);
    font-size: var(--text-xl);
}

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

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

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

.nav-menu {
    display: flex;
    align-items: center;
    gap: var(--space-1);
}

.nav-link {
    display: block;
    padding: var(--space-3) var(--space-5);
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--color-text-secondary);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%) scaleX(0);
    width: 60%;
    height: 2px;
    background: var(--gradient-accent);
    border-radius: var(--radius-full);
    transition: transform var(--transition-base);
}

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

.nav-link:hover::after,
.nav-link.active::after {
    transform: translateX(-50%) scaleX(1);
}

/* ------------------------------------------
   7. HERO SECTION
   ------------------------------------------ */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    overflow: hidden;
    padding: calc(80px + var(--space-12)) var(--space-6) var(--space-12);
}

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

.hero-grid {
    position: absolute;
    inset: 0;
    background-image: 
        linear-gradient(rgba(0, 212, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 212, 255, 0.03) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse at center, black 40%, transparent 70%);
    -webkit-mask-image: radial-gradient(ellipse at center, black 40%, transparent 70%);
}

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

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 640px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-2) var(--space-4);
    background: rgba(0, 212, 255, 0.1);
    border: 1px solid rgba(0, 212, 255, 0.2);
    border-radius: var(--radius-full);
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--color-accent-blue);
    margin-bottom: var(--space-6);
}

.badge-pulse {
    width: 8px;
    height: 8px;
    background: var(--color-accent-cyan);
    border-radius: var(--radius-full);
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(0.8); }
}

.hero-title {
    font-size: var(--text-5xl);
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -0.03em;
    margin-bottom: var(--space-6);
}

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

.hero-actions {
    display: flex;
    gap: var(--space-4);
    margin-bottom: var(--space-16);
    flex-wrap: wrap;
}

.hero-stats {
    display: flex;
    gap: var(--space-10);
}

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

.stat-number {
    font-size: var(--text-3xl);
    font-weight: 700;
    color: var(--color-accent-blue);
    font-family: var(--font-mono);
}

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

/* Hero Visual - Digital Twin Animation */
.hero-visual {
    position: absolute;
    right: 5%;
    top: 50%;
    transform: translateY(-50%);
    z-index: 1;
}

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

.twin-ring {
    position: absolute;
    border: 1px solid rgba(0, 212, 255, 0.2);
    border-radius: 50%;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

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

.twin-ring-1::before {
    content: '';
    position: absolute;
    inset: -2px;
    border-radius: 50%;
    border: 2px solid transparent;
    border-top-color: var(--color-accent-blue);
}

.twin-ring-2 {
    width: 220px;
    height: 220px;
    animation: rotate 15s linear infinite reverse;
    border-color: rgba(0, 245, 212, 0.15);
}

.twin-ring-3 {
    width: 140px;
    height: 140px;
    animation: rotate 10s linear infinite;
    border-color: rgba(168, 85, 247, 0.2);
}

.twin-core {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 80px;
    height: 80px;
}

.core-inner {
    position: absolute;
    inset: 0;
    background: var(--gradient-accent);
    border-radius: 50%;
    opacity: 0.9;
    animation: corePulse 3s ease-in-out infinite;
}

.core-pulse {
    position: absolute;
    inset: -20px;
    border: 1px solid var(--color-accent-blue);
    border-radius: 50%;
    animation: corePulse 3s ease-in-out infinite 0.5s;
}

.twin-data {
    position: absolute;
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-3);
    background: var(--color-bg-glass);
    backdrop-filter: blur(10px);
    border: 1px solid var(--color-border-glass);
    border-radius: var(--radius-md);
    font-size: var(--text-xs);
    font-family: var(--font-mono);
    color: var(--color-accent-cyan);
}

.twin-data-1 {
    top: 20%;
    right: 0;
    animation: float 4s ease-in-out infinite;
}

.twin-data-2 {
    bottom: 25%;
    left: 0;
    animation: float 4s ease-in-out infinite 1s;
}

.twin-data-3 {
    top: 60%;
    right: 10%;
    animation: float 4s ease-in-out infinite 2s;
}

.data-bar {
    width: 3px;
    height: 16px;
    background: var(--color-accent-cyan);
    border-radius: var(--radius-full);
    animation: dataBar 2s ease-in-out infinite;
}

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

@keyframes corePulse {
    0%, 100% { transform: scale(1); opacity: 0.9; }
    50% { transform: scale(1.1); opacity: 0.7; }
}

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

@keyframes dataBar {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.3; }
}

/* 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-3);
    color: var(--color-text-muted);
    font-size: var(--text-xs);
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

.scroll-mouse {
    width: 24px;
    height: 36px;
    border: 2px solid var(--color-text-muted);
    border-radius: var(--radius-full);
    position: relative;
}

.scroll-wheel {
    position: absolute;
    top: 6px;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 8px;
    background: var(--color-accent-blue);
    border-radius: var(--radius-full);
    animation: scrollWheel 2s ease-in-out infinite;
}

@keyframes scrollWheel {
    0%, 100% { top: 6px; opacity: 1; }
    50% { top: 16px; opacity: 0.3; }
}

/* ------------------------------------------
   8. ABOUT SECTION
   ------------------------------------------ */
.about {
    position: relative;
    padding: var(--space-24) 0;
    overflow: hidden;
}

.section-background {
    position: absolute;
    inset: 0;
    pointer-events: none;
}

.glow-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(100px);
    opacity: 0.15;
}

.glow-orb-1 {
    width: 400px;
    height: 400px;
    background: var(--color-accent-blue);
    top: -100px;
    left: -100px;
}

.glow-orb-2 {
    width: 300px;
    height: 300px;
    background: var(--color-accent-purple);
    bottom: -50px;
    right: -50px;
}

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

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

.about-card-main {
    grid-row: span 2;
    display: flex;
    flex-direction: column;
}

.card-icon {
    width: 56px;
    height: 56px;
    color: var(--color-accent-blue);
    margin-bottom: var(--space-6);
}

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

.about-card h3 {
    font-size: var(--text-xl);
    font-weight: 700;
    margin-bottom: var(--space-4);
}

.about-card p {
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-bottom: var(--space-6);
}

.card-features {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-3);
    margin-top: auto;
}

.feature-tag {
    padding: var(--space-2) var(--space-4);
    background: rgba(0, 212, 255, 0.1);
    border: 1px solid rgba(0, 212, 255, 0.2);
    border-radius: var(--radius-full);
    font-size: var(--text-xs);
    font-weight: 600;
    color: var(--color-accent-blue);
}

/* ------------------------------------------
   9. SYSTEMS SECTION
   ------------------------------------------ */
.systems {
    padding: var(--space-24) 0;
    background: var(--color-bg-secondary);
}

.systems-visual {
    display: flex;
    justify-content: center;
    padding: var(--space-12) 0;
}

.system-hub {
    position: relative;
    width: 500px;
    height: 500px;
}

.hub-center {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 160px;
    height: 160px;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    z-index: 2;
}

.hub-label {
    font-size: var(--text-sm);
    font-weight: 700;
    line-height: 1.4;
    color: var(--color-accent-blue);
}

.system-node {
    position: absolute;
    width: 120px;
    height: 100px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    z-index: 2;
}

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

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

.node-label {
    font-size: var(--text-xs);
    font-weight: 600;
    color: var(--color-text-secondary);
}

.node-connection {
    position: absolute;
    height: 2px;
    background: linear-gradient(90deg, var(--color-accent-blue), transparent);
    transform-origin: left center;
}

.node-1 {
    top: 10%;
    left: 50%;
    transform: translateX(-50%);
}

.node-1 .node-connection {
    width: 100px;
    bottom: -50px;
    left: 50%;
    transform: rotate(90deg);
    transform-origin: top center;
}

.node-2 {
    right: 10%;
    top: 50%;
    transform: translateY(-50%);
}

.node-2 .node-connection {
    width: 80px;
    left: -80px;
    top: 50%;
    transform: translateY(-50%);
}

.node-3 {
    bottom: 10%;
    left: 50%;
    transform: translateX(-50%);
}

.node-3 .node-connection {
    width: 100px;
    top: -50px;
    left: 50%;
    transform: rotate(-90deg);
    transform-origin: bottom center;
}

.node-4 {
    left: 10%;
    top: 50%;
    transform: translateY(-50%);
}

.node-4 .node-connection {
    width: 80px;
    right: -80px;
    top: 50%;
    transform: translateY(-50%);
}

/* ------------------------------------------
   10. PROGRAMS SECTION
   ------------------------------------------ */
.programs {
    position: relative;
    padding: var(--space-24) 0;
    overflow: hidden;
}

.grid-pattern {
    position: absolute;
    inset: 0;
    background-image: 
        linear-gradient(rgba(0, 212, 255, 0.02) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 212, 255, 0.02) 1px, transparent 1px);
    background-size: 80px 80px;
}

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

.program-card {
    position: relative;
    padding: var(--space-8);
    background: var(--color-bg-glass);
    backdrop-filter: blur(20px);
    border: 1px solid var(--color-border-glass);
    border-radius: var(--radius-xl);
    overflow: hidden;
    transition: all var(--transition-slow);
}

.program-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--gradient-card);
    opacity: 0;
    transition: opacity var(--transition-slow);
}

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

.card-glow {
    position: absolute;
    top: -50%;
    right: -50%;
    width: 200px;
    height: 200px;
    background: var(--color-accent-blue);
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0;
    transition: opacity var(--transition-slow);
}

.program-card:hover .card-glow {
    opacity: 0.15;
}

.program-number {
    position: absolute;
    top: var(--space-6);
    right: var(--space-6);
    font-size: var(--text-5xl);
    font-weight: 800;
    color: rgba(255, 255, 255, 0.03);
    line-height: 1;
}

.program-icon {
    width: 56px;
    height: 56px;
    color: var(--color-accent-blue);
    margin-bottom: var(--space-6);
    position: relative;
}

.program-title {
    font-size: var(--text-2xl);
    font-weight: 700;
    margin-bottom: var(--space-4);
    position: relative;
}

.program-desc {
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-bottom: var(--space-6);
    position: relative;
}

.program-meta {
    display: flex;
    gap: var(--space-4);
    margin-bottom: var(--space-6);
    position: relative;
}

.meta-item {
    padding: var(--space-1) var(--space-3);
    background: rgba(0, 212, 255, 0.1);
    border-radius: var(--radius-sm);
    font-size: var(--text-xs);
    font-weight: 600;
    color: var(--color-accent-cyan);
}

.program-skills {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
    margin-bottom: var(--space-8);
    position: relative;
}

.program-skills li {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
}

.program-skills li::before {
    content: '';
    width: 6px;
    height: 6px;
    background: var(--color-accent-cyan);
    border-radius: var(--radius-full);
    flex-shrink: 0;
}

.program-cta {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    color: var(--color-accent-blue);
    font-size: var(--text-sm);
    font-weight: 600;
    transition: all var(--transition-base);
    position: relative;
}

.program-cta svg {
    width: 16px;
    height: 16px;
    transition: transform var(--transition-base);
}

.program-cta:hover {
    color: var(--color-accent-cyan);
}

.program-cta:hover svg {
    transform: translateX(4px);
}

/* ------------------------------------------
   11. INNOVATION LAB SECTION
   ------------------------------------------ */
.lab {
    padding: var(--space-24) 0;
    background: var(--color-bg-secondary);
}

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

.project-card {
    overflow: hidden;
    padding: 0;
}

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

.project-visual {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Turbine Visual */
.turbine-visual {
    background: linear-gradient(180deg, #0a1628 0%, #1a2744 100%);
}

.turbine-blade {
    position: absolute;
    width: 4px;
    height: 70px;
    background: linear-gradient(to top, var(--color-accent-blue), transparent);
    border-radius: var(--radius-full);
    transform-origin: bottom center;
    bottom: 50%;
    left: 50%;
}

.blade-1 { transform: translateX(-50%) rotate(0deg); animation: turbineSpin 3s linear infinite; }
.blade-2 { transform: translateX(-50%) rotate(120deg); animation: turbineSpin 3s linear infinite; }
.blade-3 { transform: translateX(-50%) rotate(240deg); animation: turbineSpin 3s linear infinite; }

.turbine-hub {
    position: absolute;
    width: 16px;
    height: 16px;
    background: var(--color-accent-blue);
    border-radius: 50%;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    box-shadow: var(--shadow-glow-blue);
}

@keyframes turbineSpin {
    from { transform: translateX(-50%) rotate(var(--angle, 0deg)); }
    to { transform: translateX(-50%) rotate(calc(var(--angle, 0deg) + 360deg)); }
}

.blade-1 { --angle: 0deg; }
.blade-2 { --angle: 120deg; }
.blade-3 { --angle: 240deg; }

/* Factory Visual */
.factory-visual {
    background: linear-gradient(180deg, #1a1a2e 0%, #2d2d44 100%);
}

.conveyor {
    position: absolute;
    bottom: 40%;
    left: 10%;
    right: 10%;
    height: 4px;
    background: var(--color-text-muted);
    border-radius: var(--radius-full);
}

.conveyor::after {
    content: '';
    position: absolute;
    left: 0;
    top: -4px;
    width: 20px;
    height: 12px;
    background: var(--color-accent-cyan);
    border-radius: var(--radius-sm);
    animation: conveyorMove 2s linear infinite;
}

@keyframes conveyorMove {
    from { left: 0; }
    to { left: calc(100% - 20px); }
}

.robot-arm {
    position: absolute;
    width: 4px;
    background: var(--color-accent-blue);
    border-radius: var(--radius-full);
    transform-origin: top center;
}

.arm-1 {
    height: 60px;
    left: 25%;
    top: 20%;
    animation: armWave 3s ease-in-out infinite;
}

.arm-2 {
    height: 50px;
    right: 25%;
    top: 25%;
    animation: armWave 3s ease-in-out infinite 1.5s;
}

.arm-segment {
    position: absolute;
    width: 4px;
    background: inherit;
    border-radius: inherit;
}

.arm-segment:first-child {
    height: 60%;
    top: 0;
    left: 0;
}

.arm-segment:last-child {
    height: 50%;
    bottom: -40%;
    left: 20px;
    transform: rotate(45deg);
    transform-origin: top center;
}

@keyframes armWave {
    0%, 100% { transform: rotate(-10deg); }
    50% { transform: rotate(10deg); }
}

/* City Visual */
.city-visual {
    background: linear-gradient(180deg, #0a1628 0%, #162544 100%);
}

.building {
    position: absolute;
    bottom: 30%;
    width: 24px;
    background: linear-gradient(to top, var(--color-accent-blue), rgba(0, 212, 255, 0.3));
    border-radius: var(--radius-sm) var(--radius-sm) 0 0;
}

.b1 { height: 60px; left: 15%; animation: buildingPulse 4s ease-in-out infinite; }
.b2 { height: 80px; left: 30%; animation: buildingPulse 4s ease-in-out infinite 0.5s; }
.b3 { height: 100px; left: 45%; animation: buildingPulse 4s ease-in-out infinite 1s; }
.b4 { height: 70px; left: 60%; animation: buildingPulse 4s ease-in-out infinite 1.5s; }
.b5 { height: 55px; left: 75%; animation: buildingPulse 4s ease-in-out infinite 2s; }

@keyframes buildingPulse {
    0%, 100% { opacity: 0.6; }
    50% { opacity: 1; box-shadow: 0 0 20px rgba(0, 212, 255, 0.3); }
}

.city-flow {
    position: absolute;
    bottom: 20%;
    left: 10%;
    right: 10%;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--color-accent-cyan), transparent);
    animation: flowMove 3s linear infinite;
}

@keyframes flowMove {
    from { transform: translateX(-100%); opacity: 0; }
    50% { opacity: 1; }
    to { transform: translateX(100%); opacity: 0; }
}

/* Engine Visual */
.engine-visual {
    background: linear-gradient(180deg, #1a0a0a 0%, #2d1a1a 100%);
}

.engine-block {
    position: absolute;
    width: 80px;
    height: 60px;
    border: 2px solid var(--color-text-muted);
    border-radius: var(--radius-md);
}

.piston {
    position: absolute;
    width: 12px;
    height: 30px;
    background: linear-gradient(to bottom, var(--color-accent-blue), var(--color-accent-cyan));
    border-radius: var(--radius-sm);
    top: 5px;
}

.p1 { left: 10px; animation: pistonMove 1s ease-in-out infinite; }
.p2 { left: 28px; animation: pistonMove 1s ease-in-out infinite 0.25s; }
.p3 { left: 46px; animation: pistonMove 1s ease-in-out infinite 0.5s; }
.p4 { left: 64px; animation: pistonMove 1s ease-in-out infinite 0.75s; }

@keyframes pistonMove {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(15px); }
}

/* Grid Visual */
.grid-visual {
    background: linear-gradient(180deg, #0a1a0a 0%, #1a2d1a 100%);
}

.power-grid {
    position: relative;
    width: 100px;
    height: 100px;
}

.node {
    position: absolute;
    width: 12px;
    height: 12px;
    background: var(--color-accent-cyan);
    border-radius: 50%;
    box-shadow: 0 0 10px var(--color-accent-cyan);
}

.n1 { top: 0; left: 50%; transform: translateX(-50%); }
.n2 { top: 50%; right: 0; transform: translateY(-50%); }
.n3 { bottom: 0; left: 50%; transform: translateX(-50%); }
.n4 { top: 50%; left: 0; transform: translateY(-50%); }
.n5 { top: 50%; left: 50%; transform: translate(-50%, -50%); }

.line {
    position: absolute;
    height: 2px;
    background: linear-gradient(90deg, var(--color-accent-cyan), transparent);
    transform-origin: left center;
}

.l1 { width: 50px; top: 6px; left: 50%; transform: rotate(45deg); }
.l2 { width: 50px; top: 50%; left: 50%; transform: rotate(135deg); }
.l3 { width: 50px; top: 50%; right: 50%; transform: rotate(225deg); }
.l4 { width: 50px; bottom: 6px; left: 50%; transform: rotate(315deg); }

/* Ship Visual */
.ship-visual {
    background: linear-gradient(180deg, #0a0a1a 0%, #1a1a3d 100%);
}

.vessel {
    position: relative;
    animation: shipRock 4s ease-in-out infinite;
}

.hull {
    width: 80px;
    height: 30px;
    background: linear-gradient(to bottom, var(--color-accent-blue), var(--color-accent-purple));
    border-radius: 0 0 40px 40px;
    position: relative;
}

.deck {
    position: absolute;
    top: -10px;
    left: 20px;
    width: 40px;
    height: 15px;
    background: var(--color-bg-glass);
    border-radius: var(--radius-sm);
}

.radar {
    position: absolute;
    top: -20px;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 15px;
    background: var(--color-accent-cyan);
}

.radar::after {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 20px;
    height: 20px;
    border: 2px solid var(--color-accent-cyan);
    border-radius: 50%;
    border-bottom-color: transparent;
    animation: radarSpin 2s linear infinite;
}

.wave {
    position: absolute;
    bottom: -10px;
    height: 4px;
    background: linear-gradient(90deg, transparent, var(--color-accent-blue), transparent);
    border-radius: var(--radius-full);
}

.wave-1 { left: -10px; right: -10px; animation: waveMove 2s ease-in-out infinite; }
.wave-2 { left: -5px; right: -5px; bottom: -5px; animation: waveMove 2s ease-in-out infinite 0.5s; }

@keyframes shipRock {
    0%, 100% { transform: rotate(-2deg); }
    50% { transform: rotate(2deg); }
}

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

@keyframes waveMove {
    0%, 100% { transform: translateX(0); opacity: 0.5; }
    50% { transform: translateX(10px); opacity: 1; }
}

/* Project Overlay & Info */
.project-overlay {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: flex-start;
    justify-content: flex-end;
    padding: var(--space-4);
}

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

.project-status.live {
    background: rgba(0, 245, 212, 0.2);
    color: var(--color-accent-cyan);
}

.project-status.demo {
    background: rgba(0, 212, 255, 0.2);
    color: var(--color-accent-blue);
}

.project-status.beta {
    background: rgba(168, 85, 247, 0.2);
    color: var(--color-accent-purple);
}

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

.project-info h3 {
    font-size: var(--text-lg);
    font-weight: 700;
    margin-bottom: var(--space-3);
}

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

.project-tags {
    display: flex;
    gap: var(--space-3);
}

.project-tags span {
    padding: var(--space-1) var(--space-3);
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-sm);
    font-size: var(--text-xs);
    color: var(--color-text-muted);
}

/* ------------------------------------------
   12. CONTACT SECTION
   ------------------------------------------ */
.contact {
    position: relative;
    padding: var(--space-24) 0;
    overflow: hidden;
}

.contact-background {
    position: absolute;
    inset: 0;
}

.contact-grid {
    position: absolute;
    inset: 0;
    background-image: 
        linear-gradient(rgba(0, 212, 255, 0.02) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 212, 255, 0.02) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse at center, black 50%, transparent 100%);
}

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

.contact-lead {
    font-size: var(--text-lg);
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-bottom: var(--space-10);
}

.contact-methods {
    display: flex;
    flex-direction: column;
    gap: var(--space-6);
    margin-bottom: var(--space-10);
}

.contact-method {
    display: flex;
    align-items: flex-start;
    gap: var(--space-4);
    padding: var(--space-4);
    border-radius: var(--radius-lg);
    transition: background var(--transition-base);
}

.contact-method:hover {
    background: var(--color-bg-glass-light);
}

.method-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);
    color: var(--color-accent-blue);
    flex-shrink: 0;
}

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

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

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

.method-value {
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--color-text-primary);
    line-height: 1.5;
}

.contact-social {
    display: flex;
    gap: var(--space-4);
}

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

.social-link:hover {
    background: rgba(0, 212, 255, 0.1);
    border-color: var(--color-border-glass-hover);
    color: var(--color-accent-blue);
}

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

/* Contact Form */
.contact-form-wrapper {
    padding: var(--space-8);
}

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

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-6);
}

.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-glass-light);
    border: 1px solid var(--color-border-glass);
    border-radius: var(--radius-lg);
    color: var(--color-text-primary);
    font-size: var(--text-sm);
    transition: all var(--transition-base);
}

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

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

.form-group select {
    cursor: pointer;
    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='%2394a3b8' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 40px;
}

.form-group select option {
    background: var(--color-bg-secondary);
    color: var(--color-text-primary);
}

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

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

.footer-content {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: var(--space-16);
    margin-bottom: var(--space-12);
}

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

.footer-logo {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    font-size: var(--text-xl);
    font-weight: 700;
}

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

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

.footer-column h4 {
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: var(--space-4);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

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

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

.footer-column a:hover {
    color: var(--color-accent-blue);
}

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

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

/* ------------------------------------------
   14. ANIMATIONS & SCROLL EFFECTS
   ------------------------------------------ */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity var(--transition-slower), transform var(--transition-slower);
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Stagger children */
.stagger-children > * {
    opacity: 0;
    transform: translateY(20px);
}

.stagger-children.visible > * {
    opacity: 1;
    transform: translateY(0);
    transition: opacity var(--transition-slow), transform var(--transition-slow);
}

.stagger-children.visible > *:nth-child(1) { transition-delay: 0ms; }
.stagger-children.visible > *:nth-child(2) { transition-delay: 100ms; }
.stagger-children.visible > *:nth-child(3) { transition-delay: 200ms; }
.stagger-children.visible > *:nth-child(4) { transition-delay: 300ms; }
.stagger-children.visible > *:nth-child(5) { transition-delay: 400ms; }
.stagger-children.visible > *:nth-child(6) { transition-delay: 500ms; }

/* ------------------------------------------
   15. RESPONSIVE DESIGN
   ------------------------------------------ */
@media (max-width: 1024px) {
    .hero-visual {
        display: none;
    }
    
    .about-grid {
        grid-template-columns: 1fr;
    }
    
    .about-card-main {
        grid-row: auto;
    }
    
    .contact-wrapper {
        grid-template-columns: 1fr;
        gap: var(--space-12);
    }
    
    .section-title {
        font-size: var(--text-3xl);
    }
    
    .hero-title {
        font-size: var(--text-4xl);
    }
}

@media (max-width: 768px) {
    .nav-toggle {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        top: 72px;
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(10, 14, 26, 0.98);
        backdrop-filter: blur(20px);
        flex-direction: column;
        align-items: center;
        justify-content: center;
        gap: var(--space-4);
        transform: translateX(100%);
        transition: transform var(--transition-base);
    }
    
    .nav-menu.active {
        transform: translateX(0);
    }
    
    .nav-link {
        font-size: var(--text-xl);
        padding: var(--space-4) var(--space-8);
    }
    
    .hero {
        padding-top: calc(72px + var(--space-8));
    }
    
    .hero-title {
        font-size: var(--text-3xl);
    }
    
    .hero-stats {
        gap: var(--space-6);
    }
    
    .stat-number {
        font-size: var(--text-2xl);
    }
    
    .programs-grid {
        grid-template-columns: 1fr;
    }
    
    .lab-grid {
        grid-template-columns: 1fr;
    }
    
    .systems-visual {
        transform: scale(0.7);
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--space-10);
    }
    
    .footer-links {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: var(--space-4);
        text-align: center;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: var(--text-2xl);
    }
    
    .hero-actions {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
        justify-content: center;
    }
    
    .section-title {
        font-size: var(--text-2xl);
    }
    
    .program-card {
        padding: var(--space-6);
    }
    
    .footer-links {
        grid-template-columns: 1fr;
    }
}

/* ------------------------------------------
   16. ACCESSIBILITY
   ------------------------------------------ */
@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;
    }
}

/* Focus styles */
:focus-visible {
    outline: 2px solid var(--color-accent-blue);
    outline-offset: 2px;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    :root {
        --color-border-glass: rgba(255, 255, 255, 0.3);
        --color-text-secondary: #b0c4de;
    }
}