/* ============================================
   APEX AI ACADEMY — STYLES.CSS
   Автономная логистика | Беспилотные системы
   ============================================ */

/* ----------------------------------------
   1. CSS CUSTOM PROPERTIES (Design Tokens)
   ---------------------------------------- */
:root {
    /* Colors */
    --color-bg: #0b1121;
    --color-bg-elevated: #101a2e;
    --color-bg-card: #0f172a;
    --color-surface: rgba(255, 255, 255, 0.03);
    --color-primary: #00d4ff;
    --color-primary-dim: rgba(0, 212, 255, 0.08);
    --color-primary-glow: rgba(0, 212, 255, 0.3);
    --color-secondary: #7c3aed;
    --color-accent: #00e5ff;
    --color-text: #e2e8f0;
    --color-text-dim: #94a3b8;
    --color-text-muted: #64748b;
    --color-border: rgba(148, 163, 184, 0.1);
    --color-border-glow: rgba(0, 212, 255, 0.2);

    /* Gradients */
    --gradient-hero: radial-gradient(ellipse at 60% 20%, rgba(0, 212, 255, 0.07) 0%, transparent 60%),
                     radial-gradient(ellipse at 20% 80%, rgba(124, 58, 237, 0.05) 0%, transparent 50%),
                     linear-gradient(160deg, #0b1121 0%, #1a1f35 40%, #0f172a 100%);
    --gradient-card-border: linear-gradient(135deg, rgba(0, 212, 255, 0.3) 0%, transparent 40%, transparent 60%, rgba(124, 58, 237, 0.2) 100%);
    --gradient-glass: rgba(15, 23, 42, 0.65);

    /* Typography */
    --font-display: 'Exo 2', sans-serif;
    --font-body: 'Inter', sans-serif;
    --font-mono: 'JetBrains Mono', monospace;

    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
    --space-4xl: 6rem;

    /* Transitions */
    --transition-fast: 0.15s 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-bounce: 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);

    /* Shadows & Glows */
    --shadow-glow: 0 0 30px rgba(0, 212, 255, 0.15);
    --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.3);
    --shadow-button: 0 4px 16px rgba(0, 212, 255, 0.25);

    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;
}

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

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

body {
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-bg);
    overflow-x: hidden;
    min-height: 100vh;
}

/* Selection */
::selection {
    background-color: rgba(0, 212, 255, 0.25);
    color: #ffffff;
}

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

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

::-webkit-scrollbar-thumb {
    background: rgba(0, 212, 255, 0.3);
    border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(0, 212, 255, 0.5);
}

/* Focus */
:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 3px;
    border-radius: var(--radius-sm);
}

a {
    color: inherit;
    text-decoration: none;
    transition: color var(--transition-fast);
}

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

/* ----------------------------------------
   3. PROGRESS BAR
   ---------------------------------------- */
.progress-bar {
    position: fixed;
    top: 0;
    left: 0;
    width: 0%;
    height: 3px;
    background: var(--gradient-card-border);
    z-index: 101;
    transition: width 0.1s linear;
    box-shadow: 0 0 10px var(--color-primary-glow);
}

/* ----------------------------------------
   4. NAVIGATION
   ---------------------------------------- */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 100;
    padding: var(--space-md) 0;
    transition: background-color var(--transition-base), backdrop-filter var(--transition-base), padding var(--transition-base);
}

.navbar.scrolled {
    background-color: rgba(11, 17, 33, 0.85);
    backdrop-filter: blur(20px) saturate(1.8);
    -webkit-backdrop-filter: blur(20px) saturate(1.8);
    padding: var(--space-sm) 0;
    border-bottom: 1px solid var(--color-border);
}

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

/* Logo */
.logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    text-decoration: none;
}

.logo-icon {
    width: 44px;
    height: 44px;
    position: relative;
    flex-shrink: 0;
}

.logo-drone {
    width: 100%;
    height: 100%;
    position: relative;
}

.drone-body {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 8px;
    background: var(--color-primary);
    border-radius: var(--radius-sm);
    transform: translate(-50%, -50%);
    box-shadow: 0 0 12px var(--color-primary-glow);
}

.drone-prop {
    position: absolute;
    width: 10px;
    height: 2px;
    background: rgba(0, 212, 255, 0.5);
    border-radius: var(--radius-full);
    animation: propSpin 0.6s linear infinite;
}

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

.drone-prop-1 { top: 12px; left: 10px; transform-origin: right center; }
.drone-prop-2 { top: 12px; right: 10px; transform-origin: left center; }
.drone-prop-3 { bottom: 12px; left: 10px; transform-origin: right center; }
.drone-prop-4 { bottom: 12px; right: 10px; transform-origin: left center; }

.logo-text {
    font-family: var(--font-display);
    font-weight: 800;
    font-size: 1.5rem;
    line-height: 1;
    display: flex;
    flex-direction: column;
}

.logo-apex {
    color: #ffffff;
    letter-spacing: 0.05em;
    font-size: 0.85rem;
}

.logo-ai {
    color: var(--color-primary);
    letter-spacing: 0.15em;
    font-size: 1.15rem;
    text-shadow: 0 0 16px var(--color-primary-glow);
}

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

.nav-link {
    display: block;
    padding: var(--space-sm) var(--space-md);
    font-family: var(--font-display);
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-text-dim);
    border-radius: var(--radius-md);
    transition: color var(--transition-fast), background-color var(--transition-fast);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 2px;
    left: var(--space-md);
    right: var(--space-md);
    height: 2px;
    background: var(--color-primary);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition-fast);
    border-radius: var(--radius-full);
    box-shadow: 0 0 6px var(--color-primary-glow);
}

.nav-link:hover {
    color: #ffffff;
    background-color: rgba(0, 212, 255, 0.05);
}

.nav-link:hover::after {
    transform: scaleX(1);
}

.nav-cta {
    background-color: rgba(0, 212, 255, 0.1);
    border: 1px solid rgba(0, 212, 255, 0.3);
    color: var(--color-primary);
    margin-left: var(--space-sm);
}

.nav-cta:hover {
    background-color: rgba(0, 212, 255, 0.15);
    border-color: var(--color-primary);
}

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

/* Mobile Menu */
.mobile-menu-btn {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 44px;
    height: 44px;
    background: none;
    border: none;
    cursor: pointer;
    gap: 6px;
    padding: 10px;
}

.mobile-menu-btn span {
    display: block;
    width: 24px;
    height: 2px;
    background-color: var(--color-text);
    border-radius: var(--radius-full);
    transition: transform var(--transition-base), opacity var(--transition-base), background-color var(--transition-fast);
}

.mobile-menu-btn.active span:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
}

.mobile-menu-btn.active span:nth-child(2) {
    opacity: 0;
}

.mobile-menu-btn.active span:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
}

/* ----------------------------------------
   5. SECTION UTILITIES
   ---------------------------------------- */
.section-container {
    max-width: 1280px;
    margin: 0 auto;
    padding: var(--space-4xl) var(--space-xl);
}

.section-header {
    text-align: center;
    margin-bottom: var(--space-3xl);
}

.section-label {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--color-primary);
    margin-bottom: var(--space-md);
    position: relative;
}

.section-label::before {
    content: '';
    display: inline-block;
    width: 24px;
    height: 1px;
    background: var(--color-primary);
}

.section-title {
    font-family: var(--font-display);
    font-size: clamp(2rem, 5vw, 3.25rem);
    font-weight: 700;
    color: #ffffff;
    line-height: 1.15;
    margin-bottom: var(--space-md);
    letter-spacing: -0.02em;
}

.section-desc {
    font-size: 1.125rem;
    color: var(--color-text-dim);
    max-width: 560px;
    margin: 0 auto;
    line-height: 1.6;
}

/* ----------------------------------------
   6. HERO SECTION
   ---------------------------------------- */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    background: var(--gradient-hero);
    padding-top: 80px;
}

.hero-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 1;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(circle at 50% 50%, rgba(11, 17, 33, 0.3) 0%, transparent 60%),
        linear-gradient(180deg, rgba(11, 17, 33, 0.1) 0%, rgba(11, 17, 33, 0.8) 100%);
    z-index: 2;
}

.hero-container {
    position: relative;
    z-index: 3;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--space-xl);
    width: 100%;
}

.hero-content {
    max-width: 760px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-xs) var(--space-md);
    background: rgba(0, 212, 255, 0.08);
    border: 1px solid rgba(0, 212, 255, 0.15);
    border-radius: var(--radius-full);
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--color-primary);
    margin-bottom: var(--space-xl);
    backdrop-filter: blur(8px);
}

.badge-dot {
    width: 8px;
    height: 8px;
    background-color: var(--color-primary);
    border-radius: var(--radius-full);
    animation: pulse-dot 2s ease-in-out infinite;
    box-shadow: 0 0 8px var(--color-primary-glow);
}

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

.hero-title {
    font-family: var(--font-display);
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 800;
    line-height: 1.1;
    color: #ffffff;
    margin-bottom: var(--space-xl);
    letter-spacing: -0.03em;
}

.title-line {
    display: block;
}

.title-accent {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 50%, var(--color-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    position: relative;
}

.hero-subtitle {
    font-size: clamp(1rem, 2vw, 1.25rem);
    color: var(--color-text-dim);
    line-height: 1.7;
    margin-bottom: var(--space-2xl);
    max-width: 560px;
}

.hero-actions {
    margin-bottom: var(--space-3xl);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-xl);
    font-family: var(--font-display);
    font-size: 0.95rem;
    font-weight: 700;
    border-radius: var(--radius-md);
    cursor: pointer;
    border: none;
    transition: transform var(--transition-fast), box-shadow var(--transition-base), background-color var(--transition-base);
    position: relative;
    overflow: hidden;
}

.btn:active {
    transform: scale(0.97);
}

.btn-primary {
    background-color: var(--color-primary);
    color: #0b1121;
    box-shadow: var(--shadow-button);
}

.btn-primary:hover {
    background-color: var(--color-accent);
    transform: translateY(-2px);
    box-shadow: 0 6px 24px rgba(0, 212, 255, 0.35);
}

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

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

.btn-full {
    width: 100%;
}

/* Hero Stats */
.hero-stats {
    display: flex;
    align-items: center;
    gap: var(--space-xl);
}

.stat-item {
    display: flex;
    align-items: baseline;
    gap: 2px;
}

.stat-number {
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 800;
    color: #ffffff;
    line-height: 1;
}

.stat-plus, .stat-percent {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-primary);
}

.stat-label {
    margin-left: var(--space-sm);
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

.stat-divider {
    width: 1px;
    height: 28px;
    background: var(--color-border);
}

/* Floating Drone */
.hero-drone-float {
    position: absolute;
    top: 60%;
    right: 8%;
    transform: translateY(-50%);
    z-index: 3;
    opacity: 0.6;
    animation: floatDrone 8s ease-in-out infinite;
}

.hero-drone-float svg {
    width: 240px;
    height: 160px;
}

@keyframes floatDrone {
    0%, 100% { transform: translateY(-50%) rotate(0deg); }
    33% { transform: translateY(-60%) rotate(3deg); }
    66% { transform: translateY(-40%) rotate(-2deg); }
}

.drone-propeller {
    stroke: var(--color-primary);
    stroke-width: 2;
    fill: none;
    animation: rotorSpin 0.3s linear infinite;
}

@keyframes rotorSpin {
    from { transform: rotate(0deg) scale(1); }
    to { transform: rotate(360deg) scale(1); }
}

/* Tracking dots */
.tracking-dots {
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
    z-index: 2;
    pointer-events: none;
    overflow: hidden;
}

.dot {
    position: absolute;
    width: 4px;
    height: 4px;
    background: var(--color-primary);
    border-radius: 50%;
    opacity: 0;
    animation: dotPulse 4s ease-in-out infinite;
    box-shadow: 0 0 8px rgba(0, 212, 255, 0.4);
}

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

/* ----------------------------------------
   7. ABOUT SECTION
   ---------------------------------------- */
.about {
    background-color: var(--color-bg);
    position: relative;
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-4xl);
    align-items: center;
}

.about-visual {
    position: relative;
}

.about-image-wrapper {
    position: relative;
    border-radius: var(--radius-xl);
    overflow: hidden;
}

.about-image-bg {
    position: absolute;
    inset: -2px;
    background: var(--gradient-card-border);
    border-radius: calc(var(--radius-xl) + 2px);
    opacity: 0.5;
    filter: blur(8px);
}

.about-image {
    width: 100%;
    height: 360px;
    object-fit: cover;
    border-radius: var(--radius-xl);
    position: relative;
    z-index: 1;
    filter: brightness(0.85) contrast(1.1);
    transition: transform var(--transition-slow);
}

.about-image-wrapper:hover .about-image {
    transform: scale(1.03);
}

/* Float cards */
.about-float-card {
    position: absolute;
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
    background: var(--gradient-glass);
    backdrop-filter: blur(16px) saturate(1.5);
    -webkit-backdrop-filter: blur(16px) saturate(1.5);
    border: 1px solid var(--color-border-glow);
    border-radius: var(--radius-lg);
    font-family: var(--font-mono);
    font-size: 0.875rem;
    color: #ffffff;
    z-index: 2;
    box-shadow: var(--shadow-glow);
    animation: floatCard 6s ease-in-out infinite;
}

.float-card-1 {
    top: -20px;
    right: -20px;
    animation-delay: 0s;
}

.float-card-2 {
    bottom: 20px;
    left: -20px;
    animation-delay: 3s;
}

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

.about-content {
    padding-left: var(--space-xl);
}

.about-title {
    font-family: var(--font-display);
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    font-weight: 700;
    color: #ffffff;
    margin-bottom: var(--space-lg);
    line-height: 1.2;
}

.about-text {
    color: var(--color-text-dim);
    margin-bottom: var(--space-lg);
    line-height: 1.7;
    font-size: 1.05rem;
}

.about-features {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
    margin-top: var(--space-2xl);
}

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

.feature-icon {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-primary-dim);
    border: 1px solid var(--color-border-glow);
    border-radius: var(--radius-md);
    color: var(--color-primary);
    flex-shrink: 0;
    transition: transform var(--transition-fast);
}

.feature-item:hover .feature-icon {
    transform: scale(1.1) rotate(5deg);
}

.feature-title {
    display: block;
    font-family: var(--font-display);
    font-weight: 600;
    color: #ffffff;
    margin-bottom: 4px;
}

.feature-desc {
    font-size: 0.9rem;
    color: var(--color-text-muted);
    line-height: 1.5;
}

/* ----------------------------------------
   8. PROGRAMS SECTION
   ---------------------------------------- */
.programs {
    background-color: var(--color-bg-elevated);
    position: relative;
    overflow: hidden;
}

.programs::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -20%;
    width: 60%;
    height: 100%;
    background: radial-gradient(circle, rgba(0, 212, 255, 0.04) 0%, transparent 70%);
    pointer-events: none;
}

.programs-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-lg);
}

/* Program Cards */
.program-card {
    position: relative;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    overflow: hidden;
    transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
    display: flex;
    flex-direction: column;
    height: 100%;
}

.program-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: var(--gradient-card-border);
    opacity: 0;
    transition: opacity var(--transition-base);
}

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

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

.program-card-featured {
    border-color: rgba(0, 212, 255, 0.2);
}

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

.program-card-visual {
    position: relative;
    height: 180px;
    overflow: hidden;
}

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

.program-card:hover .program-card-visual img {
    transform: scale(1.08);
}

.program-card-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to bottom, rgba(11, 17, 33, 0.2) 0%, rgba(11, 17, 33, 0.7) 100%);
}

.program-card-badge {
    position: absolute;
    top: var(--space-md);
    right: var(--space-md);
    padding: var(--space-xs) var(--space-sm);
    background: rgba(11, 17, 33, 0.7);
    backdrop-filter: blur(8px);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-full);
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--color-text-dim);
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.program-card-badge-hot {
    background: rgba(0, 212, 255, 0.15);
    border-color: rgba(0, 212, 255, 0.3);
    color: var(--color-primary);
}

.program-card-content {
    padding: var(--space-xl);
    display: flex;
    flex-direction: column;
    flex: 1;
}

.program-card-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-primary-dim);
    border: 1px solid var(--color-border-glow);
    border-radius: var(--radius-md);
    color: var(--color-primary);
    margin-bottom: var(--space-md);
    transition: transform var(--transition-base);
}

.program-card:hover .program-card-icon {
    transform: scale(1.1) rotate(-5deg);
}

.program-card-title {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 700;
    color: #ffffff;
    margin-bottom: var(--space-sm);
    line-height: 1.3;
}

.program-card-text {
    font-size: 0.9rem;
    color: var(--color-text-dim);
    line-height: 1.6;
    margin-bottom: var(--space-lg);
    flex: 1;
}

.program-card-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.program-card-list li {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    padding-left: var(--space-lg);
    position: relative;
}

.program-card-list li::before {
    content: '';
    position: absolute;
    left: 6px;
    top: 9px;
    width: 4px;
    height: 4px;
    background: var(--color-primary);
    border-radius: var(--radius-full);
    box-shadow: 0 0 6px var(--color-primary-glow);
}

/* ----------------------------------------
   9. LAB SECTION
   ---------------------------------------- */
.lab {
    background-color: var(--color-bg);
    position: relative;
    overflow: hidden;
}

.lab-bg-effect {
    position: absolute;
    inset: 0;
    opacity: 0.3;
    background: 
        radial-gradient(circle at 10% 20%, rgba(0, 212, 255, 0.06) 0%, transparent 40%),
        radial-gradient(circle at 90% 80%, rgba(124, 58, 237, 0.04) 0%, transparent 40%);
    pointer-events: none;
}

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

.lab-card {
    position: relative;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    overflow: hidden;
    transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.lab-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 2px;
    background: var(--gradient-card-border);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.lab-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-card);
}

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

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

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

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

.lab-card-body {
    padding: var(--space-xl);
}

.lab-card-title {
    font-family: var(--font-display);
    font-size: 1.15rem;
    font-weight: 700;
    color: #ffffff;
    margin-bottom: var(--space-sm);
}

.lab-card-desc {
    font-size: 0.875rem;
    color: var(--color-text-dim);
    line-height: 1.6;
    margin-bottom: var(--space-md);
}

.lab-card-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.tag {
    display: inline-block;
    padding: 4px 10px;
    background: var(--color-primary-dim);
    border: 1px solid rgba(0, 212, 255, 0.1);
    border-radius: var(--radius-full);
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--color-primary);
    transition: background-color var(--transition-fast);
}

.tag:hover {
    background: rgba(0, 212, 255, 0.12);
}

/* ----------------------------------------
   10. CONTACT SECTION
   ---------------------------------------- */
.contact {
    background-color: var(--color-bg-elevated);
    position: relative;
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-4xl);
    align-items: flex-start;
}

.contact-title {
    font-family: var(--font-display);
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    font-weight: 700;
    color: #ffffff;
    margin-bottom: var(--space-md);
    line-height: 1.2;
}

.contact-text {
    color: var(--color-text-dim);
    line-height: 1.7;
    margin-bottom: var(--space-2xl);
    font-size: 1.05rem;
}

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

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

.contact-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-primary-dim);
    border: 1px solid var(--color-border-glow);
    border-radius: var(--radius-md);
    color: var(--color-primary);
    flex-shrink: 0;
    transition: transform var(--transition-bounce), box-shadow var(--transition-base);
}

.contact-item:hover .contact-icon {
    transform: scale(1.15) rotate(10deg);
    box-shadow: var(--shadow-glow);
}

.contact-item-body {
    display: flex;
    flex-direction: column;
}

.contact-item-label {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-text-muted);
    margin-bottom: 4px;
}

.contact-item-value {
    font-size: 1rem;
    color: var(--color-text);
    transition: color var(--transition-fast);
}

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

/* Contact Form */
.contact-form {
    background: var(--gradient-glass);
    backdrop-filter: blur(24px) saturate(1.5);
    -webkit-backdrop-filter: blur(24px) saturate(1.5);
    border: 1px solid var(--color-border-glow);
    border-radius: var(--radius-xl);
    padding: var(--space-2xl);
    box-shadow: var(--shadow-card);
    position: relative;
    overflow: hidden;
}

.contact-form::after {
    content: '';
    position: absolute;
    inset: -1px;
    background: var(--gradient-card-border);
    border-radius: inherit;
    opacity: 0.3;
    z-index: -1;
    filter: blur(1px);
}

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

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

.form-field label {
    display: block;
    font-family: var(--font-display);
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--space-sm);
}

.form-field input,
.form-field select,
.form-field textarea {
    width: 100%;
    padding: var(--space-md) var(--space-lg);
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    color: #ffffff;
    font-family: var(--font-body);
    font-size: 0.925rem;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast), background-color var(--transition-fast);
}

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

.form-field input:focus,
.form-field select:focus,
.form-field textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.1);
    background-color: rgba(255, 255, 255, 0.05);
}

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

.form-field select option {
    background-color: var(--color-bg-card);
    color: var(--color-text);
}

/* Validation states */
.form-field input.error,
.form-field textarea.error {
    border-color: #ef4444;
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1);
}

.form-field .field-error {
    position: absolute;
    bottom: -20px;
    left: 0;
    font-size: 0.75rem;
    color: #ef4444;
    display: none;
}

.form-field input.error ~ .field-error,
.form-field textarea.error ~ .field-error {
    display: block;
}

/* ----------------------------------------
   11. FOOTER
   ---------------------------------------- */
.footer {
    background-color: #070c18;
    border-top: 1px solid var(--color-border);
    position: relative;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: var(--space-3xl);
    padding-bottom: var(--space-3xl);
    border-bottom: 1px solid var(--color-border);
}

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

.footer-logo-icon {
    width: 40px;
    height: 40px;
}

.footer-desc {
    color: var(--color-text-muted);
    font-size: 0.9rem;
    line-height: 1.6;
    margin-bottom: var(--space-lg);
    max-width: 280px;
}

.footer-social {
    display: flex;
    gap: var(--space-sm);
}

.social-link {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    color: var(--color-text-dim);
    transition: all var(--transition-fast);
}

.social-link:hover {
    background: var(--color-primary-dim);
    border-color: var(--color-border-glow);
    color: var(--color-primary);
    transform: translateY(-3px);
    box-shadow: 0 4px 12px rgba(0, 212, 255, 0.2);
}

.footer-heading {
    font-family: var(--font-display);
    font-size: 0.9rem;
    font-weight: 700;
    color: #ffffff;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: var(--space-lg);
}

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

.footer-links a {
    color: var(--color-text-dim);
    font-size: 0.9rem;
    transition: color var(--transition-fast), transform var(--transition-fast);
    display: inline-block;
}

.footer-links a:hover {
    color: var(--color-primary);
    transform: translateX(4px);
}

.footer-bottom {
    padding-top: var(--space-xl);
    text-align: center;
}

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

/* ----------------------------------------
   12. TOAST NOTIFICATION
   ---------------------------------------- */
.toast {
    position: fixed;
    bottom: var(--space-xl);
    right: var(--space-xl);
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-md) var(--space-xl);
    background: var(--gradient-glass);
    backdrop-filter: blur(20px) saturate(1.5);
    -webkit-backdrop-filter: blur(20px) saturate(1.5);
    border: 1px solid rgba(0, 212, 255, 0.3);
    border-radius: var(--radius-lg);
    color: #ffffff;
    font-family: var(--font-display);
    font-weight: 600;
    z-index: 200;
    transform: translateY(120px);
    opacity: 0;
    transition: transform var(--transition-bounce), opacity var(--transition-base);
    box-shadow: var(--shadow-glow);
}

.toast.active {
    transform: translateY(0);
    opacity: 1;
}

.toast-icon {
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 212, 255, 0.15);
    border-radius: var(--radius-full);
    color: var(--color-primary);
    flex-shrink: 0;
}

/* ----------------------------------------
   13. SCROLL REVEAL ANIMATIONS
   ---------------------------------------- */
.reveal {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.7s cubic-bezier(0.4, 0, 0.2, 1), transform 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }
.reveal-delay-5 { transition-delay: 0.5s; }
.reveal-delay-6 { transition-delay: 0.6s; }

/* ----------------------------------------
   14. RESPONSIVE DESIGN
   ---------------------------------------- */

/* Tablet */
@media (max-width: 1024px) {
    .section-container {
        padding: var(--space-3xl) var(--space-xl);
    }

    .about-grid {
        grid-template-columns: 1fr;
        gap: var(--space-3xl);
    }

    .about-content {
        padding-left: 0;
    }

    .about-visual {
        max-width: 600px;
        margin: 0 auto;
    }

    .programs-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .lab-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .contact-grid {
        grid-template-columns: 1fr;
        gap: var(--space-3xl);
    }

    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }

    .hero-drone-float {
        display: none;
    }
}

/* Mobile */
@media (max-width: 768px) {
    .section-container {
        padding: var(--space-3xl) var(--space-lg);
    }

    .nav-container {
        padding: 0 var(--space-lg);
    }

    .mobile-menu-btn {
        display: flex;
    }

    .nav-menu {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        flex-direction: column;
        background: rgba(11, 17, 33, 0.95);
        backdrop-filter: blur(20px);
        padding: var(--space-lg);
        gap: var(--space-xs);
        border-bottom: 1px solid var(--color-border);
        transform: translateY(-20px);
        opacity: 0;
        visibility: hidden;
        pointer-events: none;
        transition: transform var(--transition-base), opacity var(--transition-base), visibility var(--transition-base);
    }

    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
        pointer-events: auto;
    }

    .nav-link {
        padding: var(--space-md);
        font-size: 1rem;
        text-align: center;
    }

    .nav-cta {
        margin-left: 0;
        margin-top: var(--space-sm);
    }

    .hero-title {
        font-size: clamp(2rem, 8vw, 3rem);
    }

    .hero-stats {
        flex-wrap: wrap;
        gap: var(--space-lg);
    }

    .stat-divider {
        display: none;
    }

    .stat-item {
        min-width: 100px;
    }

    .programs-grid {
        grid-template-columns: 1fr;
        max-width: 480px;
        margin: 0 auto;
    }

    .lab-grid {
        grid-template-columns: 1fr;
        max-width: 480px;
        margin: 0 auto;
    }

    .form-row {
        grid-template-columns: 1fr;
        gap: 0;
    }

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

    .about-float-card {
        display: none;
    }
}

/* Small Mobile */
@media (max-width: 480px) {
    .hero-subtitle {
        font-size: 0.95rem;
    }

    .section-title {
        font-size: clamp(1.5rem, 7vw, 2rem);
    }

    .about-title,
    .contact-title {
        font-size: 1.5rem;
    }

    .program-card-visual {
        height: 160px;
    }

    .stat-number {
        font-size: 1.5rem;
    }
}

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