/* ============================================
   INFINITY AI AUTONOMOUS AVIATION ACADEMY
   ============================================
   Table of Contents:
   1. CSS Variables & Reset
   2. Base Styles & Typography
   3. Navigation
   4. Hero Section
   5. Systems/About Section
   6. Programs Section
   7. Aviation Lab Section
   8. Contact Section
   9. Footer
   10. Animations & Keyframes
   11. Responsive Design
   ============================================ */

/* ============================================
   1. CSS VARIABLES & RESET
   ============================================ */
:root {
    /* Core Colors - Midnight Blue Theme */
    --color-bg-deep: #030712;
    --color-bg-mid: #0f172a;
    --color-bg-surface: #1e293b;
    --color-bg-glass: rgba(30, 41, 59, 0.6);
    
    /* Neon Cyan Accents */
    --color-cyan-400: #22d3ee;
    --color-cyan-500: #06b6d4;
    --color-cyan-600: #0891b2;
    --color-cyan-glow: rgba(34, 211, 238, 0.3);
    --color-cyan-glow-strong: rgba(34, 211, 238, 0.6);
    
    /* Text Colors */
    --color-text-primary: #f0f9ff;
    --color-text-secondary: #94a3b8;
    --color-text-muted: #64748b;
    
    /* Gradients */
    --gradient-hero: linear-gradient(135deg, #020617 0%, #0f172a 40%, #1e3a5f 100%);
    --gradient-card: linear-gradient(145deg, rgba(30, 41, 59, 0.8), rgba(15, 23, 42, 0.9));
    --gradient-cyan: linear-gradient(135deg, var(--color-cyan-400), var(--color-cyan-600));
    
    /* Typography */
    --font-display: 'Orbitron', sans-serif;
    --font-heading: 'Rajdhani', sans-serif;
    --font-body: 'Inter', sans-serif;
    
    /* Spacing */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2.5rem;
    --space-xl: 4rem;
    --space-2xl: 6rem;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
    --transition-slower: 0.8s cubic-bezier(0.16, 1, 0.3, 1);
    
    /* Border Radius */
    --radius-sm: 0.5rem;
    --radius-md: 0.75rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;
    
    /* Shadows */
    --shadow-glow: 0 0 20px var(--color-cyan-glow);
    --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.3);
}

*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

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

/* ============================================
   2. BASE STYLES & TYPOGRAPHY
   ============================================ */
.section-container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--space-md);
}

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

.section-tag {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    font-family: var(--font-heading);
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-cyan-400);
    margin-bottom: var(--space-sm);
}

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

.section-title {
    font-family: var(--font-display);
    font-size: clamp(1.75rem, 4vw, 3rem);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--space-md);
    background: linear-gradient(135deg, var(--color-text-primary) 0%, var(--color-cyan-400) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-description {
    font-size: 1.125rem;
    color: var(--color-text-secondary);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.7;
}

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

.navbar.scrolled {
    background: rgba(3, 7, 18, 0.9);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(34, 211, 238, 0.1);
    padding: var(--space-xs) 0;
}

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

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

.logo-icon {
    font-size: 1.75rem;
    color: var(--color-cyan-400);
    font-weight: 700;
    animation: pulse-glow 3s ease-in-out infinite;
}

.logo-text {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: 0.05em;
}

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

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

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

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--space-lg);
}

.nav-link {
    font-family: var(--font-heading);
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--color-text-secondary);
    text-decoration: none;
    position: relative;
    padding: var(--space-xs) 0;
    transition: color var(--transition-fast);
}

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

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

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

/* ============================================
   4. 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: 1;
}

#heroCanvas {
    width: 100%;
    height: 100%;
    display: block;
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse at center, transparent 0%, rgba(3, 7, 18, 0.7) 70%, var(--color-bg-deep) 100%);
    z-index: 2;
}

.hero-content {
    position: relative;
    z-index: 3;
    text-align: center;
    max-width: 900px;
    padding: 0 var(--space-md);
    animation: fade-in-up 1s var(--transition-slower) forwards;
    opacity: 0;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    font-family: var(--font-heading);
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--color-cyan-400);
    margin-bottom: var(--space-lg);
    padding: var(--space-xs) var(--space-md);
    background: var(--color-bg-glass);
    border: 1px solid rgba(34, 211, 238, 0.2);
    border-radius: 100px;
    backdrop-filter: blur(10px);
}

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

.hero-headline {
    font-family: var(--font-display);
    font-size: clamp(2.5rem, 6vw, 5rem);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: var(--space-md);
    letter-spacing: -0.02em;
}

.highlight {
    background: linear-gradient(135deg, var(--color-cyan-400), var(--color-cyan-600));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--color-text-secondary);
    max-width: 560px;
    margin: 0 auto var(--space-xl);
    line-height: 1.7;
}

.cta-button {
    position: relative;
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-xl);
    background: transparent;
    border: 2px solid var(--color-cyan-400);
    border-radius: 100px;
    color: var(--color-cyan-400);
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    overflow: hidden;
    transition: all var(--transition-base);
}

.cta-button:hover {
    color: var(--color-bg-deep);
    border-color: transparent;
}

.cta-glow {
    position: absolute;
    inset: 0;
    background: var(--gradient-cyan);
    transform: translateX(-100%);
    transition: transform var(--transition-slow);
    z-index: -1;
}

.cta-button:hover .cta-glow {
    transform: translateX(0);
}

.cta-arrow {
    transition: transform var(--transition-base);
}

.cta-button:hover .cta-arrow {
    transform: translateX(4px);
}

.hero-scroll-indicator {
    position: absolute;
    bottom: var(--space-xl);
    left: 50%;
    transform: translateX(-50%);
    z-index: 3;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-sm);
    color: var(--color-text-muted);
    font-family: var(--font-heading);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.2em;
}

.scroll-line {
    width: 1px;
    height: 60px;
    background: linear-gradient(to bottom, var(--color-cyan-400), transparent);
    animation: scroll-pulse 2s ease-in-out infinite;
}

.hero-stats {
    position: absolute;
    bottom: var(--space-xl);
    left: 0;
    right: 0;
    z-index: 3;
    display: flex;
    justify-content: center;
    gap: var(--space-xl);
    padding: 0 var(--space-md);
}

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

.stat-number {
    display: block;
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-cyan-400);
    line-height: 1;
}

.stat-label {
    font-family: var(--font-heading);
    font-size: 0.75rem;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

/* ============================================
   5. SYSTEMS/ABOUT SECTION
   ============================================ */
.systems {
    padding: var(--space-2xl) 0;
    position: relative;
}

.systems::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(to right, transparent, var(--color-cyan-400), transparent);
    opacity: 0.3;
}

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

.system-card {
    background: var(--gradient-card);
    border: 1px solid rgba(34, 211, 238, 0.1);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    position: relative;
    overflow: hidden;
    transition: all var(--transition-base);
    backdrop-filter: blur(10px);
}

.system-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: var(--gradient-cyan);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition-slow);
}

.system-card:hover {
    border-color: rgba(34, 211, 238, 0.3);
    transform: translateY(-4px);
    box-shadow: var(--shadow-glow), var(--shadow-card);
}

.system-card:hover::before {
    transform: scaleX(1);
}

.system-icon {
    width: 56px;
    height: 56px;
    color: var(--color-cyan-400);
    margin-bottom: var(--space-md);
}

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

.system-title {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--space-sm);
}

.system-text {
    color: var(--color-text-secondary);
    font-size: 0.9375rem;
    line-height: 1.7;
    margin-bottom: var(--space-md);
}

.system-progress {
    height: 4px;
    background: rgba(34, 211, 238, 0.1);
    border-radius: 2px;
    overflow: hidden;
}

.progress-bar {
    height: 100%;
    width: var(--progress);
    background: var(--gradient-cyan);
    border-radius: 2px;
    animation: progress-fill 1.5s ease-out forwards;
    transform-origin: left;
}

/* ============================================
   6. PROGRAMS SECTION
   ============================================ */
.programs {
    padding: var(--space-2xl) 0;
    background: linear-gradient(180deg, var(--color-bg-deep) 0%, var(--color-bg-mid) 50%, var(--color-bg-deep) 100%);
    position: relative;
}

.programs-container {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

.program-card {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: var(--space-xl);
    background: var(--gradient-card);
    border: 1px solid rgba(34, 211, 238, 0.1);
    border-radius: var(--radius-xl);
    padding: var(--space-xl);
    position: relative;
    overflow: hidden;
    transition: all var(--transition-base);
    backdrop-filter: blur(10px);
}

.program-card:hover {
    border-color: rgba(34, 211, 238, 0.25);
    transform: translateX(8px);
}

.program-visual {
    display: flex;
    align-items: center;
    justify-content: center;
}

.program-hologram {
    position: relative;
    width: 200px;
    height: 200px;
}

.hologram-ring {
    position: absolute;
    inset: 0;
    border: 1px solid rgba(34, 211, 238, 0.2);
    border-radius: 50%;
    animation: hologram-spin 8s linear infinite;
}

.hologram-ring:nth-child(2) {
    inset: 20px;
    animation-duration: 12s;
    animation-direction: reverse;
    border-color: rgba(34, 211, 238, 0.15);
}

.hologram-ring:nth-child(3) {
    inset: 40px;
    animation-duration: 16s;
    border-style: dashed;
    border-color: rgba(34, 211, 238, 0.1);
}

.hologram-aircraft {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 3rem;
    color: var(--color-cyan-400);
    text-shadow: 0 0 20px var(--color-cyan-glow);
    animation: hologram-float 3s ease-in-out infinite;
}

.program-content {
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.program-number {
    font-family: var(--font-display);
    font-size: 0.875rem;
    font-weight: 700;
    color: var(--color-cyan-400);
    margin-bottom: var(--space-xs);
}

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

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

.program-meta {
    display: flex;
    gap: var(--space-md);
    margin-bottom: var(--space-md);
}

.meta-item {
    font-family: var(--font-heading);
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-text-muted);
    padding: var(--space-xs) var(--space-sm);
    background: rgba(34, 211, 238, 0.05);
    border-radius: var(--radius-sm);
    border: 1px solid rgba(34, 211, 238, 0.1);
}

.program-modules {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-xs);
}

.module {
    font-size: 0.8125rem;
    color: var(--color-cyan-400);
    padding: 4px 12px;
    background: rgba(34, 211, 238, 0.08);
    border: 1px solid rgba(34, 211, 238, 0.15);
    border-radius: 100px;
}

/* ============================================
   7. AVIATION LAB SECTION
   ============================================ */
.aviation-lab {
    padding: var(--space-2xl) 0;
    position: relative;
}

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

.project-card {
    background: var(--gradient-card);
    border: 1px solid rgba(34, 211, 238, 0.1);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all var(--transition-base);
    backdrop-filter: blur(10px);
}

.project-card:hover {
    border-color: rgba(34, 211, 238, 0.3);
    transform: translateY(-8px) scale(1.02);
    box-shadow: var(--shadow-glow), var(--shadow-card);
}

.project-image {
    position: relative;
    height: 200px;
    overflow: hidden;
}

.project-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-bg-mid), var(--color-bg-surface));
    position: relative;
}

.project-icon {
    font-size: 4rem;
    opacity: 0.6;
    transition: all var(--transition-base);
}

.project-card:hover .project-icon {
    opacity: 1;
    transform: scale(1.1);
}

.project-scan-line {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--color-cyan-400);
    box-shadow: 0 0 10px var(--color-cyan-glow);
    animation: scan-line 3s ease-in-out infinite;
}

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

.project-tag {
    display: inline-block;
    font-family: var(--font-heading);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-cyan-400);
    padding: 4px 10px;
    background: rgba(34, 211, 238, 0.1);
    border-radius: var(--radius-sm);
    margin-bottom: var(--space-xs);
}

.project-name {
    font-family: var(--font-display);
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 4px;
}

.project-author {
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

.project-stats {
    display: flex;
    padding: var(--space-sm) var(--space-md);
    border-top: 1px solid rgba(34, 211, 238, 0.1);
    gap: var(--space-md);
}

.project-stats .stat {
    flex: 1;
}

.project-stats .stat-value {
    display: block;
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-cyan-400);
}

.project-stats .stat-name {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    text-transform: uppercase;
}

/* ============================================
   8. CONTACT SECTION
   ============================================ */
.contact {
    padding: var(--space-2xl) 0;
    background: linear-gradient(180deg, var(--color-bg-deep) 0%, var(--color-bg-mid) 100%);
    position: relative;
}

.contact::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(to right, transparent, var(--color-cyan-400), transparent);
    opacity: 0.3;
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: var(--space-2xl);
    align-items: start;
}

.contact-info {
    padding-top: var(--space-md);
}

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

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

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

.contact-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(34, 211, 238, 0.1);
    border: 1px solid rgba(34, 211, 238, 0.2);
    border-radius: var(--radius-md);
    color: var(--color-cyan-400);
    flex-shrink: 0;
}

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

.contact-text {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

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

.contact-value {
    font-size: 1rem;
    color: var(--color-text-primary);
    text-decoration: none;
    transition: color var(--transition-fast);
    font-style: normal;
}

.contact-value:hover {
    color: var(--color-cyan-400);
}

/* Contact Form */
.contact-form-wrapper {
    background: var(--gradient-card);
    border: 1px solid rgba(34, 211, 238, 0.15);
    border-radius: var(--radius-xl);
    padding: var(--space-xl);
    backdrop-filter: blur(20px);
}

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

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: var(--space-sm) 0;
    background: transparent;
    border: none;
    border-bottom: 1px solid rgba(148, 163, 184, 0.3);
    color: var(--color-text-primary);
    font-family: var(--font-body);
    font-size: 1rem;
    outline: none;
    transition: border-color var(--transition-base);
}

.form-group textarea {
    resize: vertical;
    min-height: 80px;
}

.form-group label {
    position: absolute;
    left: 0;
    top: var(--space-sm);
    color: var(--color-text-muted);
    font-size: 0.9375rem;
    pointer-events: none;
    transition: all var(--transition-base);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus,
.form-group input:not(:placeholder-shown),
.form-group select:not(:placeholder-shown),
.form-group textarea:not(:placeholder-shown) {
    border-color: var(--color-cyan-400);
}

.form-group input:focus ~ label,
.form-group select:focus ~ label,
.form-group textarea:focus ~ label,
.form-group input:not(:placeholder-shown) ~ label,
.form-group select:not(:placeholder-shown) ~ label,
.form-group textarea:not(:placeholder-shown) ~ label {
    top: -20px;
    font-size: 0.75rem;
    color: var(--color-cyan-400);
}

.form-line {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-cyan);
    transition: width var(--transition-base);
}

.form-group input:focus ~ .form-line,
.form-group select:focus ~ .form-line,
.form-group textarea:focus ~ .form-line {
    width: 100%;
}

.submit-button {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: var(--space-md);
    background: var(--gradient-cyan);
    border: none;
    border-radius: var(--radius-md);
    color: var(--color-bg-deep);
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 700;
    cursor: pointer;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.submit-button::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transform: translateX(-100%);
    transition: transform var(--transition-slow);
}

.submit-button:hover::before {
    transform: translateX(100%);
}

.submit-button:hover {
    box-shadow: var(--shadow-glow);
    transform: translateY(-2px);
}

.submit-icon {
    width: 18px;
    height: 18px;
}

/* ============================================
   9. FOOTER
   ============================================ */
.footer {
    padding: var(--space-xl) 0;
    border-top: 1px solid rgba(34, 211, 238, 0.1);
}

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

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

.footer-brand .logo-icon {
    font-size: 1.5rem;
}

.footer-brand .logo-text {
    font-size: 1.125rem;
}

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

.footer-links {
    display: flex;
    gap: var(--space-lg);
}

.footer-links a {
    font-family: var(--font-heading);
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-text-secondary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.footer-links a:hover {
    color: var(--color-cyan-400);
}

/* ============================================
   10. ANIMATIONS & KEYFRAMES
   ============================================ */
@keyframes fade-in-up {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes pulse-glow {
    0%, 100% {
        text-shadow: 0 0 10px var(--color-cyan-glow);
    }
    50% {
        text-shadow: 0 0 30px var(--color-cyan-glow-strong);
    }
}

@keyframes pulse-dot {
    0%, 100% {
        opacity: 1;
        transform: scale(1);
    }
    50% {
        opacity: 0.5;
        transform: scale(1.3);
    }
}

@keyframes scroll-pulse {
    0%, 100% {
        opacity: 1;
        transform: scaleY(1);
        transform-origin: top;
    }
    50% {
        opacity: 0.3;
        transform: scaleY(0.5);
        transform-origin: top;
    }
}

@keyframes hologram-spin {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

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

@keyframes progress-fill {
    from {
        transform: scaleX(0);
    }
    to {
        transform: scaleX(1);
    }
}

@keyframes scan-line {
    0% {
        top: 0;
        opacity: 0;
    }
    10% {
        opacity: 1;
    }
    90% {
        opacity: 1;
    }
    100% {
        top: 100%;
        opacity: 0;
    }
}

/* Scroll-triggered animations */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* ============================================
   11. RESPONSIVE DESIGN
   ============================================ */
@media (max-width: 1024px) {
    .programs-container {
        gap: var(--space-md);
    }
    
    .program-card {
        grid-template-columns: 1fr;
        gap: var(--space-lg);
    }
    
    .program-visual {
        justify-content: flex-start;
    }
    
    .program-hologram {
        width: 160px;
        height: 160px;
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
        gap: var(--space-xl);
    }
    
    .lab-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .nav-toggle {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 280px;
        height: 100vh;
        flex-direction: column;
        gap: 0;
        background: rgba(3, 7, 18, 0.98);
        backdrop-filter: blur(20px);
        padding: 80px var(--space-lg) var(--space-lg);
        transition: right var(--transition-slow);
        border-left: 1px solid rgba(34, 211, 238, 0.1);
    }
    
    .nav-menu.active {
        right: 0;
    }
    
    .nav-link {
        padding: var(--space-md) 0;
        border-bottom: 1px solid rgba(34, 211, 238, 0.1);
    }
    
    .hero-stats {
        display: none;
    }
    
    .systems-grid {
        grid-template-columns: 1fr;
    }
    
    .lab-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-container {
        flex-direction: column;
        text-align: center;
    }
    
    .footer-links {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    :root {
        --space-xl: 2.5rem;
        --space-2xl: 4rem;
    }
    
    .hero-headline {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .cta-button {
        padding: var(--space-sm) var(--space-lg);
        font-size: 0.875rem;
    }
    
    .system-card,
    .program-card,
    .contact-form-wrapper {
        padding: var(--space-md);
    }
    
    .program-hologram {
        width: 140px;
        height: 140px;
    }
    
    .hologram-aircraft {
        font-size: 2rem;
    }
}