/* ============================================
   VERTEX AI DIGITAL ARCHITECTURE ACADEMY
   ============================================
   Premium futuristic design system
   Charcoal & Sapphire theme with glassmorphism
   ============================================ */

/* ============================================
   1. CSS CUSTOM PROPERTIES (Design Tokens)
   ============================================ */
:root {
    /* Core Colors */
    --color-charcoal: #0a0e1a;
    --color-charcoal-light: #141b2d;
    --color-charcoal-mid: #1e2746;
    
    /* Sapphire Spectrum */
    --color-sapphire-900: #0d1b3e;
    --color-sapphire-700: #1a237e;
    --color-sapphire-500: #3949ab;
    --color-sapphire-300: #7986cb;
    --color-sapphire-100: #c5cae9;
    
    /* Accent Colors */
    --color-cyan: #00e5ff;
    --color-cyan-glow: rgba(0, 229, 255, 0.3);
    --color-magenta: #e040fb;
    --color-magenta-glow: rgba(224, 64, 251, 0.3);
    
    /* Neutral */
    --color-white: #ffffff;
    --color-gray-100: #f5f5f5;
    --color-gray-300: #b0bec5;
    --color-gray-500: #78909c;
    --color-gray-700: #455a64;
    
    /* Gradients */
    --gradient-hero: linear-gradient(135deg, var(--color-charcoal) 0%, var(--color-sapphire-900) 50%, var(--color-charcoal-light) 100%);
    --gradient-sapphire: linear-gradient(135deg, var(--color-sapphire-700) 0%, var(--color-sapphire-500) 100%);
    --gradient-cyan-magenta: linear-gradient(135deg, var(--color-cyan) 0%, var(--color-magenta) 100%);
    
    /* Glassmorphism */
    --glass-bg: rgba(20, 27, 45, 0.6);
    --glass-border: rgba(255, 255, 255, 0.08);
    --glass-blur: blur(20px);
    
    /* Typography */
    --font-primary: 'Segoe UI', system-ui, -apple-system, sans-serif;
    --font-mono: 'SF 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: 2rem;
    --text-4xl: 2.5rem;
    --text-5xl: 3.5rem;
    --text-6xl: 5rem;
    
    /* Spacing */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --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: 0.15s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
    --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
    
    /* Shadows */
    --shadow-glow-cyan: 0 0 40px var(--color-cyan-glow);
    --shadow-glow-magenta: 0 0 40px var(--color-magenta-glow);
    --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.3);
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-primary);
    background: var(--color-charcoal);
    color: var(--color-white);
    line-height: 1.6;
    overflow-x: hidden;
}

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

ul {
    list-style: none;
}

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

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

.section-tag {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: var(--text-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--color-cyan);
    margin-bottom: var(--space-4);
    position: relative;
    padding-left: var(--space-6);
}

.section-tag::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: var(--space-4);
    height: 2px;
    background: var(--color-cyan);
}

.section-title {
    font-size: var(--text-4xl);
    font-weight: 700;
    line-height: 1.15;
    margin-bottom: var(--space-6);
    background: linear-gradient(135deg, var(--color-white) 0%, var(--color-sapphire-100) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-subtitle {
    font-size: var(--text-lg);
    color: var(--color-gray-300);
    max-width: 600px;
    line-height: 1.7;
}

.glass-card {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
}

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

/* ============================================
   4. BUTTONS
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-4) var(--space-8);
    font-family: var(--font-primary);
    font-size: var(--text-base);
    font-weight: 600;
    border-radius: 12px;
    border: none;
    cursor: pointer;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: var(--gradient-sapphire);
    color: var(--color-white);
    box-shadow: 0 4px 24px rgba(57, 73, 171, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 32px rgba(57, 73, 171, 0.5), var(--shadow-glow-cyan);
}

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

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

.btn-secondary {
    background: transparent;
    color: var(--color-white);
    border: 1px solid var(--glass-border);
}

.btn-secondary:hover {
    background: var(--glass-bg);
    border-color: var(--color-sapphire-300);
}

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

/* ============================================
   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(10, 14, 26, 0.9);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.2);
}

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

.nav-logo {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    font-weight: 700;
    font-size: var(--text-lg);
    letter-spacing: -0.02em;
}

.logo-icon {
    color: var(--color-cyan);
    font-size: var(--text-xl);
    animation: pulse-glow 3s ease-in-out infinite;
}

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

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

.nav-link {
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--color-gray-300);
    position: relative;
    transition: color var(--transition-base);
    padding: var(--space-2) 0;
}

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

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

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

.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: 1px;
}

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

.hero-bg-animation {
    position: absolute;
    inset: 0;
    pointer-events: none;
}

.grid-overlay {
    position: absolute;
    inset: 0;
    background-image: 
        linear-gradient(rgba(0, 229, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 229, 255, 0.03) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse at center, black 0%, transparent 70%);
    -webkit-mask-image: radial-gradient(ellipse at center, black 0%, transparent 70%);
}

.floating-shapes {
    position: absolute;
    inset: 0;
}

.shape {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.15;
    animation: float-shape 20s ease-in-out infinite;
}

.shape-1 {
    width: 400px;
    height: 400px;
    background: var(--color-cyan);
    top: 10%;
    left: 10%;
    animation-delay: 0s;
}

.shape-2 {
    width: 300px;
    height: 300px;
    background: var(--color-magenta);
    top: 60%;
    right: 10%;
    animation-delay: -5s;
}

.shape-3 {
    width: 250px;
    height: 250px;
    background: var(--color-sapphire-500);
    bottom: 20%;
    left: 40%;
    animation-delay: -10s;
}

.shape-4 {
    width: 350px;
    height: 350px;
    background: var(--color-cyan);
    top: 30%;
    right: 30%;
    animation-delay: -15s;
}

@keyframes float-shape {
    0%, 100% { transform: translate(0, 0) scale(1); }
    25% { transform: translate(50px, -50px) scale(1.1); }
    50% { transform: translate(-30px, 30px) scale(0.9); }
    75% { transform: translate(20px, 40px) scale(1.05); }
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 700px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-4);
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 100px;
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--color-cyan);
    margin-bottom: var(--space-6);
}

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

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

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

.hero-subtitle {
    font-size: var(--text-xl);
    color: var(--color-gray-300);
    line-height: 1.7;
    margin-bottom: var(--space-8);
    max-width: 560px;
}

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

.hero-stats {
    display: flex;
    gap: var(--space-12);
}

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

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

.stat-label {
    font-size: var(--text-sm);
    color: var(--color-gray-500);
    margin-top: var(--space-2);
}

/* Hero Visual - Hologram */
.hero-visual {
    position: absolute;
    right: 5%;
    top: 50%;
    transform: translateY(-50%);
    width: 500px;
    height: 500px;
    pointer-events: none;
}

.hologram-container {
    position: relative;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hologram-ring {
    position: absolute;
    border-radius: 50%;
    border: 1px solid rgba(0, 229, 255, 0.2);
    animation: ring-rotate 10s linear infinite;
}

.ring-1 {
    width: 300px;
    height: 300px;
    animation-duration: 15s;
}

.ring-2 {
    width: 400px;
    height: 400px;
    animation-duration: 20s;
    animation-direction: reverse;
    border-color: rgba(224, 64, 251, 0.15);
}

.ring-3 {
    width: 500px;
    height: 500px;
    animation-duration: 25s;
    border-style: dashed;
}

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

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

.core-building {
    width: 100%;
    height: 100%;
    background: linear-gradient(180deg, var(--color-sapphire-500) 0%, var(--color-cyan) 100%);
    clip-path: polygon(20% 0%, 80% 0%, 100% 100%, 0% 100%);
    opacity: 0.6;
    filter: blur(1px);
    animation: building-pulse 4s ease-in-out infinite;
}

@keyframes building-pulse {
    0%, 100% { opacity: 0.5; transform: scaleY(1); }
    50% { opacity: 0.8; transform: scaleY(1.05); }
}

.data-points {
    position: absolute;
    inset: 0;
}

.data-point {
    position: absolute;
    left: var(--x);
    top: var(--y);
    width: 4px;
    height: 4px;
    background: var(--color-cyan);
    border-radius: 50%;
    animation: data-float 3s ease-in-out infinite;
    animation-delay: var(--delay);
    box-shadow: 0 0 10px var(--color-cyan-glow);
}

@keyframes data-float {
    0%, 100% { transform: translateY(0); opacity: 0.6; }
    50% { transform: translateY(-20px); opacity: 1; }
}

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

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

.about-text {
    color: var(--color-gray-300);
    font-size: var(--text-lg);
    line-height: 1.8;
    margin-bottom: var(--space-6);
}

.about-features {
    display: flex;
    flex-direction: column;
    gap: var(--space-6);
    margin-top: var(--space-10);
}

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

.feature-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-sapphire);
    border-radius: 12px;
    flex-shrink: 0;
}

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

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

.feature-info p {
    font-size: var(--text-sm);
    color: var(--color-gray-500);
}

.about-visual {
    position: relative;
    height: 500px;
}

.campus-card {
    position: absolute;
    width: 100%;
    height: 100%;
    overflow: hidden;
}

.campus-image {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--color-sapphire-900) 0%, var(--color-charcoal-mid) 100%);
    position: relative;
}

.campus-image::after {
    content: '';
    position: absolute;
    inset: 0;
    background: 
        linear-gradient(45deg, transparent 48%, rgba(0, 229, 255, 0.05) 50%, transparent 52%),
        linear-gradient(-45deg, transparent 48%, rgba(224, 64, 251, 0.05) 50%, transparent 52%);
    background-size: 20px 20px;
}

.campus-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: var(--space-6);
    background: linear-gradient(transparent, rgba(10, 14, 26, 0.9));
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
}

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

.campus-status {
    font-family: var(--font-mono);
    font-size: var(--text-xs);
    color: var(--color-cyan);
    background: rgba(0, 229, 255, 0.1);
    padding: var(--space-1) var(--space-3);
    border-radius: 100px;
}

.stats-card {
    position: absolute;
    bottom: -30px;
    right: -30px;
    padding: var(--space-6);
    min-width: 160px;
}

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

.mini-value {
    display: block;
    font-family: var(--font-mono);
    font-size: var(--text-2xl);
    font-weight: 700;
    color: var(--color-cyan);
}

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

/* ============================================
   8. PROGRAMS SECTION
   ============================================ */
.programs {
    padding: var(--space-24) 0;
    background: linear-gradient(180deg, var(--color-charcoal) 0%, var(--color-charcoal-light) 50%, var(--color-charcoal) 100%);
}

.section-header {
    text-align: center;
    margin-bottom: var(--space-16);
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

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

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

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

.program-card:hover {
    transform: translateY(-8px);
    border-color: rgba(0, 229, 255, 0.2);
    box-shadow: var(--shadow-glow-cyan);
}

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

.program-number {
    position: absolute;
    top: var(--space-6);
    right: var(--space-6);
    font-family: var(--font-mono);
    font-size: var(--text-sm);
    color: var(--color-gray-700);
}

.program-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-sapphire);
    border-radius: 16px;
    margin-bottom: var(--space-6);
}

.program-icon svg {
    width: 28px;
    height: 28px;
}

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

.program-desc {
    color: var(--color-gray-300);
    line-height: 1.7;
    margin-bottom: var(--space-6);
}

.program-topics {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
    margin-bottom: var(--space-6);
}

.program-topics li {
    font-size: var(--text-sm);
    color: var(--color-gray-500);
    padding-left: var(--space-4);
    position: relative;
}

.program-topics li::before {
    content: '›';
    position: absolute;
    left: 0;
    color: var(--color-cyan);
}

.program-meta {
    display: flex;
    gap: var(--space-4);
}

.meta-item {
    font-family: var(--font-mono);
    font-size: var(--text-xs);
    padding: var(--space-2) var(--space-4);
    background: rgba(0, 229, 255, 0.08);
    border: 1px solid rgba(0, 229, 255, 0.15);
    border-radius: 100px;
    color: var(--color-cyan);
}

/* ============================================
   9. DESIGN LAB SECTION
   ============================================ */
.design-lab {
    padding: var(--space-24) 0;
    position: relative;
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    grid-auto-rows: 320px;
    gap: var(--space-6);
}

.project-card {
    position: relative;
    border-radius: 20px;
    overflow: hidden;
    cursor: pointer;
}

.project-card.large {
    grid-column: span 2;
}

.project-image {
    position: absolute;
    inset: 0;
    background: var(--project-bg);
}

.project-hologram {
    position: absolute;
    inset: 0;
    opacity: 0.3;
}

.holo-lines {
    position: absolute;
    inset: 0;
    background: repeating-linear-gradient(
        0deg,
        transparent,
        transparent 2px,
        rgba(0, 229, 255, 0.1) 2px,
        rgba(0, 229, 255, 0.1) 4px
    );
    animation: hologram-scan 3s linear infinite;
}

@keyframes hologram-scan {
    0% { transform: translateY(-100%); }
    100% { transform: translateY(100%); }
}

.project-content {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: var(--space-8);
    background: linear-gradient(transparent 0%, rgba(10, 14, 26, 0.95) 100%);
    transform: translateY(20px);
    opacity: 0;
    transition: all var(--transition-slow);
}

.project-card:hover .project-content {
    transform: translateY(0);
    opacity: 1;
}

.project-category {
    font-family: var(--font-mono);
    font-size: var(--text-xs);
    color: var(--color-cyan);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.project-title {
    font-size: var(--text-xl);
    font-weight: 700;
    margin: var(--space-2) 0 var(--space-3);
}

.project-desc {
    font-size: var(--text-sm);
    color: var(--color-gray-300);
    line-height: 1.6;
}

.project-stats {
    display: flex;
    gap: var(--space-4);
    margin-top: var(--space-4);
}

.p-stat {
    font-family: var(--font-mono);
    font-size: var(--text-xs);
    padding: var(--space-2) var(--space-3);
    background: rgba(0, 229, 255, 0.1);
    border-radius: 6px;
    color: var(--color-cyan);
}

/* ============================================
   10. CONTACT SECTION
   ============================================ */
.contact {
    padding: var(--space-24) 0;
    background: linear-gradient(180deg, var(--color-charcoal) 0%, var(--color-charcoal-light) 100%);
}

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

.contact-text {
    color: var(--color-gray-300);
    font-size: var(--text-lg);
    line-height: 1.7;
    margin-bottom: var(--space-10);
}

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

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: var(--space-4);
    padding: var(--space-4);
    border-radius: 12px;
    transition: background var(--transition-base);
}

.contact-item:hover {
    background: var(--glass-bg);
}

.contact-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-sapphire);
    border-radius: 12px;
    flex-shrink: 0;
}

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

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

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

.detail-value {
    font-size: var(--text-base);
    color: var(--color-white);
    font-weight: 500;
}

.contact-form {
    padding: var(--space-10);
}

.form-group {
    margin-bottom: var(--space-6);
}

.form-group label {
    display: block;
    font-size: var(--text-sm);
    font-weight: 500;
    margin-bottom: var(--space-3);
    color: var(--color-gray-300);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: var(--space-4) var(--space-5);
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    color: var(--color-white);
    font-family: var(--font-primary);
    font-size: var(--text-base);
    transition: all var(--transition-base);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-sapphire-300);
    box-shadow: 0 0 0 3px rgba(121, 134, 203, 0.2);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--color-gray-700);
}

.form-group select {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23b0bec5' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 16px center;
}

.form-group select option {
    background: var(--color-charcoal-light);
    color: var(--color-white);
}

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

/* ============================================
   11. FOOTER
   ============================================ */
.footer {
    padding: var(--space-16) 0 var(--space-6);
    border-top: 1px solid var(--glass-border);
}

.footer-container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--space-6);
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: var(--space-12);
    margin-bottom: var(--space-16);
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    font-weight: 700;
    font-size: var(--text-xl);
    margin-bottom: var(--space-4);
}

.footer-tagline {
    color: var(--color-gray-500);
    font-size: var(--text-base);
    line-height: 1.6;
}

.footer-col h4 {
    font-size: var(--text-sm);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--space-6);
    color: var(--color-gray-300);
}

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

.footer-col a {
    color: var(--color-gray-500);
    font-size: var(--text-sm);
    transition: color var(--transition-base);
}

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

.footer-bottom {
    text-align: center;
    padding-top: var(--space-6);
    border-top: 1px solid var(--glass-border);
}

.footer-bottom p {
    font-size: var(--text-sm);
    color: var(--color-gray-700);
}

/* ============================================
   12. RESPONSIVE DESIGN
   ============================================ */
@media (max-width: 1024px) {
    .hero-visual {
        display: none;
    }
    
    .about-grid,
    .contact-grid {
        grid-template-columns: 1fr;
        gap: var(--space-12);
    }
    
    .about-visual {
        height: 400px;
    }
    
    .stats-card {
        right: 20px;
    }
    
    .projects-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .project-card.large {
        grid-column: span 2;
    }
    
    .footer-container {
        grid-template-columns: 1fr 1fr;
        gap: var(--space-10);
    }
}

@media (max-width: 768px) {
    :root {
        --text-5xl: 2.5rem;
        --text-4xl: 2rem;
        --text-3xl: 1.5rem;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: rgba(10, 14, 26, 0.98);
        backdrop-filter: blur(20px);
        flex-direction: column;
        padding: var(--space-8);
        gap: var(--space-6);
        transform: translateY(-100%);
        opacity: 0;
        pointer-events: none;
        transition: all var(--transition-base);
    }
    
    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        pointer-events: all;
    }
    
    .hero {
        padding-top: calc(var(--space-20) + 60px);
    }
    
    .hero-headline {
        font-size: var(--text-4xl);
    }
    
    .hero-stats {
        gap: var(--space-8);
    }
    
    .programs-grid {
        grid-template-columns: 1fr;
    }
    
    .projects-grid {
        grid-template-columns: 1fr;
        grid-auto-rows: 280px;
    }
    
    .project-card.large {
        grid-column: span 1;
    }
    
    .project-content {
        transform: translateY(0);
        opacity: 1;
    }
    
    .contact-form {
        padding: var(--space-6);
    }
    
    .footer-container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .footer-logo {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .hero-cta {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
        justify-content: center;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: var(--space-6);
    }
    
    .section-container {
        padding: 0 var(--space-4);
    }
}

/* ============================================
   13. REDUCED MOTION
   ============================================ */
@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. SCROLLBAR STYLING
   ============================================ */
::-webkit-scrollbar {
    width: 8px;
}

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

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

::-webkit-scrollbar-thumb:hover {
    background: var(--color-sapphire-500);
}

/* ============================================
   15. SELECTION STYLING
   ============================================ */
::selection {
    background: var(--color-sapphire-500);
    color: var(--color-white);
}