/* ========================================
   VERTEX AI ACADEMY — GLOBAL STYLES
   ======================================== */

/* CSS Custom Properties */
:root {
    /* Color Palette: Silver, Graphite, Blue Gradients */
    --color-bg-deep: #0a0e1a;
    --color-bg-dark: #0f1424;
    --color-bg-mid: #151b2e;
    --color-bg-light: #1a2238;
    --color-surface: rgba(255, 255, 255, 0.05);
    
    /* Primary Blue Spectrum */
    --color-primary-100: #e0f2fe;
    --color-primary-300: #7dd3fc;
    --color-primary-400: #38bdf8;
    --color-primary-500: #0ea5e9;
    --color-primary-600: #0284c7;
    --color-primary-700: #0369a1;
    
    /* Silver & Graphite */
    --color-silver-100: #f8fafc;
    --color-silver-200: #e2e8f0;
    --color-silver-300: #cbd5e1;
    --color-silver-400: #94a3b8;
    --color-silver-500: #64748b;
    --color-silver-600: #475569;
    --color-graphite-700: #334155;
    --color-graphite-800: #1e293b;
    --color-graphite-900: #0f172a;
    
    /* Accent & Holographic */
    --color-accent-cyan: #06b6d4;
    --color-accent-violet: #8b5cf6;
    --color-holographic: linear-gradient(135deg, #06b6d4 0%, #8b5cf6 50%, #0ea5e9 100%);
    
    /* Glassmorphism */
    --glass-bg: rgba(255, 255, 255, 0.03);
    --glass-border: rgba(255, 255, 255, 0.08);
    --glass-highlight: rgba(255, 255, 255, 0.05);
    
    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
    
    /* Spacing */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2.5rem;
    --space-xl: 4rem;
    --space-2xl: 6rem;
    --space-3xl: 8rem;
    
    /* Transitions */
    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-smooth: 0.6s cubic-bezier(0.16, 1, 0.3, 1);
    
    /* Shadows */
    --shadow-glow: 0 0 40px rgba(14, 165, 233, 0.15);
    --shadow-glow-strong: 0 0 60px rgba(14, 165, 233, 0.25);
    --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.3);
}


/* ========================================
   RESET & BASE
   ======================================== */

*, *::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-bg-deep);
    color: var(--color-silver-200);
    line-height: 1.6;
    overflow-x: hidden;
}

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

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

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

ul {
    list-style: none;
}


/* ========================================
   UTILITIES
   ======================================== */

.container {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--space-md);
}

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

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

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

.section-tag::before {
    content: '';
    width: 24px;
    height: 1px;
    background: var(--color-primary-500);
}

.section-title {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 700;
    line-height: 1.15;
    color: var(--color-silver-100);
    margin-bottom: var(--space-md);
}

.section-desc {
    font-size: 1.125rem;
    color: var(--color-silver-400);
    max-width: 600px;
    line-height: 1.7;
}

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


/* ========================================
   BUTTONS
   ======================================== */

.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    padding: 0.875rem 1.75rem;
    font-size: 0.9375rem;
    font-weight: 600;
    border-radius: 12px;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-primary-600) 0%, var(--color-primary-500) 100%);
    color: white;
    box-shadow: 0 4px 20px rgba(14, 165, 233, 0.3);
}

.btn-primary::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, transparent 0%, rgba(255,255,255,0.15) 100%);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow-strong);
}

.btn-primary:hover::before {
    opacity: 1;
}

.btn-ghost {
    background: transparent;
    color: var(--color-silver-300);
    border: 1px solid var(--glass-border);
}

.btn-ghost:hover {
    background: var(--glass-bg);
    border-color: var(--color-primary-500);
    color: var(--color-primary-300);
}

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


/* ========================================
   NAVIGATION
   ======================================== */

.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: var(--space-sm) 0;
    transition: all var(--transition-base);
}

.nav.scrolled {
    background: rgba(10, 14, 26, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--glass-border);
}

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

.nav-logo {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--color-silver-100);
}

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

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

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

.nav-link {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-silver-400);
    border-radius: 8px;
    transition: all var(--transition-fast);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--color-primary-500);
    transition: all var(--transition-base);
    transform: translateX(-50%);
}

.nav-link:hover {
    color: var(--color-silver-100);
}

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

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 4px;
    z-index: 1001;
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-silver-200);
    border-radius: 2px;
    transition: all var(--transition-base);
}


/* ========================================
   HERO SECTION
   ======================================== */

.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
    padding: calc(var(--space-3xl) + 60px) 0 var(--space-2xl);
}

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

.hero-grid {
    position: absolute;
    inset: 0;
    background-image: 
        linear-gradient(rgba(14, 165, 233, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(14, 165, 233, 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%);
}

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

.particle {
    position: absolute;
    width: 3px;
    height: 3px;
    background: var(--color-primary-400);
    border-radius: 50%;
    opacity: 0;
    animation: particleFloat 8s infinite ease-in-out;
}

@keyframes particleFloat {
    0%, 100% {
        opacity: 0;
        transform: translateY(0) scale(0);
    }
    10% {
        opacity: 0.8;
    }
    50% {
        opacity: 0.4;
        transform: translateY(-100px) scale(1);
    }
    90% {
        opacity: 0;
    }
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--space-md);
    width: 100%;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    padding: 0.5rem 1rem;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 100px;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--color-primary-300);
    margin-bottom: var(--space-lg);
    animation: fadeInUp 0.6s ease-out;
}

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

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

.hero-title {
    font-size: clamp(2.5rem, 6vw, 5rem);
    font-weight: 800;
    line-height: 1.05;
    color: var(--color-silver-100);
    margin-bottom: var(--space-md);
    animation: fadeInUp 0.6s 0.1s ease-out both;
}

.hero-subtitle {
    font-size: clamp(1rem, 2vw, 1.25rem);
    color: var(--color-silver-400);
    max-width: 560px;
    margin-bottom: var(--space-lg);
    line-height: 1.7;
    animation: fadeInUp 0.6s 0.2s ease-out both;
}

.hero-cta {
    display: flex;
    gap: var(--space-sm);
    margin-bottom: var(--space-xl);
    animation: fadeInUp 0.6s 0.3s ease-out both;
}

.hero-stats {
    display: flex;
    gap: var(--space-xl);
    animation: fadeInUp 0.6s 0.4s ease-out both;
}

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

.stat-number {
    font-family: var(--font-mono);
    font-size: 2rem;
    font-weight: 600;
    color: var(--color-silver-100);
    line-height: 1;
}

.stat-label {
    font-size: 0.75rem;
    color: var(--color-silver-500);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-top: 4px;
}

.hero-visual {
    position: absolute;
    right: 5%;
    top: 50%;
    transform: translateY(-50%);
    z-index: 1;
}

/* Molecule Animation */
.molecule-container {
    width: 400px;
    height: 400px;
    position: relative;
}

.molecule-ring {
    position: absolute;
    border: 1px solid rgba(14, 165, 233, 0.2);
    border-radius: 50%;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.ring-1 {
    width: 200px;
    height: 200px;
    animation: ringRotate 20s linear infinite;
}

.ring-2 {
    width: 280px;
    height: 280px;
    animation: ringRotate 30s linear infinite reverse;
}

.ring-3 {
    width: 360px;
    height: 360px;
    animation: ringRotate 40s linear infinite;
}

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

.molecule-core {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 40px;
    height: 40px;
    background: radial-gradient(circle, var(--color-primary-400) 0%, transparent 70%);
    border-radius: 50%;
    box-shadow: 0 0 40px rgba(14, 165, 233, 0.4);
    animation: corePulse 3s ease-in-out infinite;
}

@keyframes corePulse {
    0%, 100% { transform: translate(-50%, -50%) scale(1); opacity: 0.8; }
    50% { transform: translate(-50%, -50%) scale(1.2); opacity: 1; }
}

.molecule-nodes {
    position: absolute;
    inset: 0;
}

.node {
    position: absolute;
    width: 12px;
    height: 12px;
    background: var(--color-silver-300);
    border-radius: 50%;
    box-shadow: 0 0 20px rgba(255, 255, 255, 0.2);
}

.node::after {
    content: '';
    position: absolute;
    inset: -4px;
    border: 1px solid rgba(14, 165, 233, 0.3);
    border-radius: 50%;
    animation: nodeOrbit 4s linear infinite;
}

.node-1 { top: 20%; left: 50%; animation: nodeFloat1 6s ease-in-out infinite; }
.node-2 { top: 35%; right: 15%; animation: nodeFloat2 7s ease-in-out infinite; }
.node-3 { bottom: 35%; right: 15%; animation: nodeFloat3 8s ease-in-out infinite; }
.node-4 { bottom: 20%; left: 50%; animation: nodeFloat4 6.5s ease-in-out infinite; }
.node-5 { bottom: 35%; left: 15%; animation: nodeFloat5 7.5s ease-in-out infinite; }
.node-6 { top: 35%; left: 15%; animation: nodeFloat6 5.5s ease-in-out infinite; }

@keyframes nodeFloat1 { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-15px); } }
@keyframes nodeFloat2 { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(10px); } }
@keyframes nodeFloat3 { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-12px); } }
@keyframes nodeFloat4 { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(15px); } }
@keyframes nodeFloat5 { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-8px); } }
@keyframes nodeFloat6 { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(12px); } }

.scroll-indicator {
    position: absolute;
    bottom: var(--space-lg);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-xs);
}

.scroll-line {
    width: 1px;
    height: 60px;
    background: linear-gradient(to bottom, var(--color-primary-500), transparent);
    animation: scrollPulse 2s ease-in-out infinite;
}

@keyframes scrollPulse {
    0%, 100% { opacity: 0.3; transform: scaleY(0.8); }
    50% { opacity: 1; transform: scaleY(1); }
}

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


/* ========================================
   ABOUT SECTION
   ======================================== */

.about {
    padding: var(--space-3xl) 0;
    position: relative;
}

.about-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-md);
    margin-bottom: var(--space-xl);
}

.about-card {
    padding: var(--space-lg);
    border-radius: 20px;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.about-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--color-primary-500), transparent);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.about-card:hover {
    transform: translateY(-4px);
    border-color: rgba(14, 165, 233, 0.2);
    box-shadow: var(--shadow-glow);
}

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

.card-icon {
    width: 48px;
    height: 48px;
    color: var(--color-primary-400);
    margin-bottom: var(--space-md);
}

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

.about-card h3 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--color-silver-100);
    margin-bottom: var(--space-xs);
}

.about-card p {
    font-size: 0.875rem;
    color: var(--color-silver-500);
    line-height: 1.6;
}

.about-image {
    position: relative;
    border-radius: 24px;
    overflow: hidden;
    aspect-ratio: 2 / 1;
}

.about-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: saturate(0.8) contrast(1.1);
}

.image-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(10, 14, 26, 0.6) 0%, rgba(14, 165, 233, 0.1) 100%);
    mix-blend-mode: multiply;
}


/* ========================================
   PROGRAMS SECTION
   ======================================== */

.programs {
    padding: var(--space-3xl) 0;
    background: linear-gradient(180deg, var(--color-bg-deep) 0%, var(--color-bg-dark) 100%);
}

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

.program-card {
    position: relative;
    border-radius: 24px;
    overflow: hidden;
    min-height: 420px;
    cursor: pointer;
}

.program-bg {
    position: absolute;
    inset: 0;
    z-index: 0;
}

.program-bg img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: brightness(0.4) saturate(0.6);
    transition: all var(--transition-slow);
}

.program-card:hover .program-bg img {
    filter: brightness(0.5) saturate(0.8);
    transform: scale(1.05);
}

.program-content {
    position: relative;
    z-index: 2;
    padding: var(--space-xl);
    display: flex;
    flex-direction: column;
    height: 100%;
    min-height: 420px;
}

.program-number {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--color-primary-400);
    margin-bottom: var(--space-sm);
}

.program-content h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-silver-100);
    margin-bottom: var(--space-xs);
}

.program-content > p {
    font-size: 0.9375rem;
    color: var(--color-silver-400);
    line-height: 1.6;
    margin-bottom: var(--space-md);
}

.program-features {
    margin-top: auto;
    margin-bottom: var(--space-md);
}

.program-features li {
    position: relative;
    padding-left: 1.25rem;
    font-size: 0.875rem;
    color: var(--color-silver-300);
    margin-bottom: 0.5rem;
}

.program-features li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0.5rem;
    width: 6px;
    height: 6px;
    background: var(--color-primary-500);
    border-radius: 50%;
}

.program-meta {
    display: flex;
    gap: var(--space-md);
    padding-top: var(--space-sm);
    border-top: 1px solid var(--glass-border);
}

.program-meta span {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--color-silver-500);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}


/* ========================================
   LAB SECTION
   ======================================== */

.lab {
    padding: var(--space-3xl) 0;
}

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

.lab-project {
    border-radius: 20px;
    overflow: hidden;
    transition: all var(--transition-base);
}

.lab-project:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-glow);
    border-color: rgba(14, 165, 233, 0.2);
}

.project-image {
    aspect-ratio: 5 / 3;
    overflow: hidden;
}

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

.lab-project:hover .project-image img {
    transform: scale(1.08);
}

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

.project-tag {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background: rgba(14, 165, 233, 0.1);
    border: 1px solid rgba(14, 165, 233, 0.2);
    border-radius: 100px;
    font-family: var(--font-mono);
    font-size: 0.6875rem;
    font-weight: 500;
    color: var(--color-primary-300);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--space-xs);
}

.project-info h3 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--color-silver-100);
    margin-bottom: var(--space-xs);
    line-height: 1.4;
}

.project-info p {
    font-size: 0.875rem;
    color: var(--color-silver-500);
    line-height: 1.6;
    margin-bottom: var(--space-sm);
}

.project-author {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--color-silver-600);
}


/* ========================================
   CONTACTS SECTION
   ======================================== */

.contacts {
    padding: var(--space-3xl) 0;
    background: linear-gradient(180deg, var(--color-bg-dark) 0%, var(--color-bg-deep) 100%);
}

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

.contacts-info .section-title {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
}

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

.contact-item {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-md);
    border-radius: 16px;
    transition: all 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: rgba(14, 165, 233, 0.1);
    border-radius: 12px;
    color: var(--color-primary-400);
    flex-shrink: 0;
}

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

.contact-text {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.contact-label {
    font-size: 0.75rem;
    color: var(--color-silver-500);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.contact-value {
    font-size: 1rem;
    font-weight: 500;
    color: var(--color-silver-200);
}

.contacts-form {
    padding: var(--space-xl);
    border-radius: 24px;
}

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

.form-group label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-silver-300);
    margin-bottom: var(--space-xs);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.875rem 1rem;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    color: var(--color-silver-200);
    font-size: 0.9375rem;
    transition: all var(--transition-fast);
}

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

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-primary-500);
    box-shadow: 0 0 0 3px rgba(14, 165, 233, 0.1);
}

.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='%2364748b' stroke-width='2'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 1rem center;
}

.form-group select option {
    background: var(--color-bg-mid);
    color: var(--color-silver-200);
}

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


/* ========================================
   FOOTER
   ======================================== */

.footer {
    padding: var(--space-2xl) 0 var(--space-lg);
    border-top: 1px solid var(--glass-border);
}

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

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

.footer-brand p {
    font-size: 0.875rem;
    color: var(--color-silver-500);
    line-height: 1.7;
    max-width: 320px;
}

.footer-links h4 {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-silver-200);
    margin-bottom: var(--space-md);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.footer-links li {
    margin-bottom: var(--space-xs);
}

.footer-links a {
    font-size: 0.875rem;
    color: var(--color-silver-500);
    transition: color var(--transition-fast);
}

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

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

.footer-bottom p {
    font-size: 0.8125rem;
    color: var(--color-silver-600);
}


/* ========================================
   RESPONSIVE DESIGN
   ======================================== */

/* Tablet */
@media (max-width: 1024px) {
    .hero-visual {
        display: none;
    }
    
    .about-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .lab-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .contacts-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Mobile */
@media (max-width: 768px) {
    .nav-toggle {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        max-width: 320px;
        height: 100vh;
        background: var(--color-bg-dark);
        border-left: 1px solid var(--glass-border);
        flex-direction: column;
        justify-content: center;
        padding: var(--space-xl);
        gap: var(--space-sm);
        transition: right var(--transition-smooth);
    }
    
    .nav-menu.active {
        right: 0;
    }
    
    .nav-link {
        font-size: 1.125rem;
        padding: var(--space-sm) 0;
    }
    
    .hero-stats {
        gap: var(--space-lg);
    }
    
    .about-grid {
        grid-template-columns: 1fr;
    }
    
    .programs-grid {
        grid-template-columns: 1fr;
    }
    
    .lab-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        gap: var(--space-lg);
    }
    
    .hero-cta {
        flex-direction: column;
    }
    
    .btn {
        justify-content: center;
    }
    
    .contacts-form {
        padding: var(--space-lg);
    }
}

/* 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;
    }
}