/* ============================================
   CSS Variables & Reset
   ============================================ */
:root {
    /* Colors - Technical Blue Theme */
    --primary-dark: #0A0E27;
    --primary-blue: #0066FF;
    --accent-cyan: #00D9FF;
    --accent-green: #00FF88;
    --text-primary: #FFFFFF;
    --text-secondary: #B0B8C8;
    --text-muted: #6B7280;
    --bg-primary: #000000;
    --bg-secondary: #0F1419;
    --bg-card: #1A1F2E;
    --border-color: #2A3441;
    --highlight: #FFD700;
    
    /* Typography */
    --font-display: 'Outfit', sans-serif;
    --font-mono: 'JetBrains Mono', 'Space Mono', monospace;
    
    /* Spacing */
    --container-width: 1280px;
    --section-padding: 120px;
    --card-radius: 16px;
    
    /* Animations */
    --transition-fast: 0.2s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
}

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

html {
    scroll-behavior: smooth;
}

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

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 24px;
}

/* ============================================
   Navigation
   ============================================ */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(10, 14, 39, 0.95);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    transition: transform var(--transition-base);
}

.navbar.hidden {
    transform: translateY(-100%);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 24px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-family: var(--font-mono);
    font-weight: 700;
    font-size: 20px;
}

.logo-bracket {
    color: var(--accent-cyan);
    font-size: 24px;
}

.logo-text {
    color: var(--text-primary);
    letter-spacing: 2px;
}

.logo-subtitle {
    font-size: 10px;
    color: var(--text-secondary);
    letter-spacing: 3px;
    margin-left: 4px;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 40px;
    align-items: center;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: color var(--transition-fast);
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-cyan);
    transition: width var(--transition-base);
}

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

.nav-links a:hover::after,
.nav-links a.active::after {
    width: 100%;
}

.btn-nav {
    padding: 10px 24px !important;
    background: var(--primary-blue);
    border-radius: 8px;
    color: var(--text-primary) !important;
}

.btn-nav:hover {
    background: var(--accent-cyan);
}

.mobile-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
}

.mobile-toggle span {
    width: 25px;
    height: 2px;
    background: var(--text-primary);
    transition: var(--transition-base);
}

/* ============================================
   Hero Section
   ============================================ */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    padding-top: 80px;
    overflow: hidden;
}

.hero-grid {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        linear-gradient(rgba(0, 217, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 217, 255, 0.03) 1px, transparent 1px);
    background-size: 50px 50px;
    animation: gridMove 20s linear infinite;
    opacity: 0.3;
}

@keyframes gridMove {
    0% { transform: translate(0, 0); }
    100% { transform: translate(50px, 50px); }
}

.hero-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-content {
    animation: fadeInUp 1s ease;
}

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

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: rgba(0, 217, 255, 0.1);
    border: 1px solid var(--accent-cyan);
    border-radius: 20px;
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 2px;
    color: var(--accent-cyan);
    margin-bottom: 32px;
    animation: fadeInUp 1s ease 0.2s backwards;
}

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

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

.hero-title {
    font-size: clamp(36px, 5vw, 64px);
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: 24px;
    font-family: var(--font-display);
}

.title-line {
    display: block;
    animation: fadeInUp 1s ease backwards;
}

.title-line:nth-child(1) { animation-delay: 0.3s; }
.title-line:nth-child(2) { animation-delay: 0.4s; }
.title-line:nth-child(3) { animation-delay: 0.5s; }

.title-line.highlight {
    background: linear-gradient(135deg, var(--accent-cyan), var(--primary-blue));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-description {
    font-size: 18px;
    color: var(--text-secondary);
    line-height: 1.8;
    max-width: 540px;
    margin-bottom: 40px;
    animation: fadeInUp 1s ease 0.6s backwards;
}

.hero-cta {
    display: flex;
    gap: 16px;
    margin-bottom: 60px;
    animation: fadeInUp 1s ease 0.7s backwards;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    padding: 16px 32px;
    font-size: 14px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    text-decoration: none;
    border-radius: 8px;
    transition: all var(--transition-base);
    border: 2px solid transparent;
    font-family: var(--font-mono);
}

.btn-primary {
    background: var(--primary-blue);
    color: var(--text-primary);
}

.btn-primary:hover {
    background: var(--accent-cyan);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0, 217, 255, 0.3);
}

.btn-secondary {
    background: transparent;
    color: var(--text-primary);
    border-color: var(--border-color);
}

.btn-secondary:hover {
    border-color: var(--accent-cyan);
    background: rgba(0, 217, 255, 0.1);
}

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

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

.hero-stats {
    display: flex;
    gap: 48px;
    animation: fadeInUp 1s ease 0.8s backwards;
}

.stat {
    text-align: left;
}

.stat-number {
    font-size: 36px;
    font-weight: 700;
    font-family: var(--font-mono);
    background: linear-gradient(135deg, var(--accent-cyan), var(--primary-blue));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: 12px;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-top: 4px;
}

.hero-visual {
    position: relative;
    animation: fadeInRight 1s ease 0.5s backwards;
}

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

.circuit-board {
    width: 100%;
    max-width: 500px;
    aspect-ratio: 1;
    background: radial-gradient(circle at 30% 30%, rgba(0, 102, 255, 0.15), transparent),
                radial-gradient(circle at 70% 70%, rgba(0, 217, 255, 0.1), transparent);
    border-radius: 20px;
    padding: 40px;
    position: relative;
}

.circuit-svg {
    width: 100%;
    height: 100%;
}

.circuit-path {
    stroke-dasharray: 1000;
    stroke-dashoffset: 1000;
    animation: drawPath 3s ease forwards;
}

@keyframes drawPath {
    to {
        stroke-dashoffset: 0;
    }
}

.circuit-node {
    animation: nodePulse 2s ease infinite;
}

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

.circuit-node.pulse {
    animation: strongPulse 1.5s ease infinite;
}

@keyframes strongPulse {
    0%, 100% { 
        opacity: 1;
        transform: scale(1);
    }
    50% { 
        opacity: 0.5;
        transform: scale(1.5);
    }
}

.scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    color: var(--text-secondary);
    font-size: 11px;
    letter-spacing: 2px;
    font-family: var(--font-mono);
    animation: fadeIn 1s ease 1.5s backwards;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.scroll-line {
    width: 1px;
    height: 40px;
    background: linear-gradient(to bottom, transparent, var(--accent-cyan));
    animation: scrollLine 2s ease infinite;
}

@keyframes scrollLine {
    0%, 100% { transform: translateY(0); opacity: 0; }
    50% { transform: translateY(20px); opacity: 1; }
}

/* ============================================
   Section Styles
   ============================================ */
.mission {
    padding: var(--section-padding) 0;
    background: linear-gradient(180deg, var(--bg-primary), var(--bg-secondary));
}

.section-header {
    text-align: center;
    margin-bottom: 80px;
}

.section-tag {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--accent-cyan);
    letter-spacing: 2px;
    margin-bottom: 16px;
}

.section-title {
    font-size: clamp(32px, 4vw, 48px);
    font-weight: 700;
    max-width: 800px;
    margin: 0 auto;
}

.mission-content {
    max-width: 900px;
    margin: 0 auto;
}

.lead-text {
    font-size: 22px;
    color: var(--text-primary);
    line-height: 1.7;
    margin-bottom: 24px;
}

.mission-text p {
    font-size: 16px;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 48px;
}

.mission-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 32px;
    margin-top: 60px;
}

.feature {
    padding: 32px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--card-radius);
    transition: all var(--transition-base);
}

.feature:hover {
    transform: translateY(-4px);
    border-color: var(--accent-cyan);
    box-shadow: 0 8px 32px rgba(0, 217, 255, 0.1);
}

.feature-icon {
    font-size: 40px;
    margin-bottom: 16px;
}

.feature h3 {
    font-size: 20px;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.feature p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
    margin: 0;
}

/* ============================================
   Featured Research
   ============================================ */
.featured-research {
    padding: var(--section-padding) 0;
    background: var(--bg-secondary);
}

.research-carousel {
    position: relative;
    padding: 0 60px;
}

.carousel-track-container {
    overflow: hidden;
    border-radius: var(--card-radius);
}

.carousel-track {
    display: flex;
    gap: 32px;
    transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.research-card {
    min-width: calc(33.333% - 22px);
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--card-radius);
    padding: 32px;
    transition: all var(--transition-base);
    flex-shrink: 0;
}

.research-card:hover {
    transform: translateY(-8px);
    border-color: var(--accent-cyan);
    box-shadow: 0 16px 48px rgba(0, 217, 255, 0.15);
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.card-tag {
    font-family: var(--font-mono);
    font-size: 10px;
    letter-spacing: 2px;
    padding: 6px 12px;
    background: rgba(0, 102, 255, 0.2);
    color: var(--accent-cyan);
    border-radius: 4px;
}

.card-date {
    font-size: 12px;
    color: var(--text-muted);
}

.card-title {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 16px;
    line-height: 1.4;
}

.card-description {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 20px;
}

.card-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 20px;
}

.card-tags span {
    font-family: var(--font-mono);
    font-size: 11px;
    padding: 4px 10px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 12px;
    color: var(--text-secondary);
}

.card-stats {
    display: flex;
    gap: 20px;
    padding: 16px 0;
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 20px;
    font-size: 13px;
    color: var(--text-secondary);
}

.card-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--accent-cyan);
    text-decoration: none;
    font-weight: 600;
    font-size: 14px;
    transition: gap var(--transition-fast);
}

.card-link:hover {
    gap: 12px;
}

.carousel-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 48px;
    height: 48px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 50%;
    color: var(--text-primary);
    font-size: 24px;
    cursor: pointer;
    transition: all var(--transition-base);
    z-index: 2;
}

.carousel-btn:hover {
    background: var(--primary-blue);
    border-color: var(--primary-blue);
}

.carousel-btn.prev {
    left: 0;
}

.carousel-btn.next {
    right: 0;
}

.carousel-indicators {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-top: 40px;
}

.indicator {
    width: 40px;
    height: 4px;
    background: var(--border-color);
    border-radius: 2px;
    cursor: pointer;
    transition: all var(--transition-base);
}

.indicator.active {
    background: var(--accent-cyan);
    width: 60px;
}

/* ============================================
   CTA Section
   ============================================ */
.cta-section {
    padding: var(--section-padding) 0;
    background: var(--bg-primary);
}

.cta-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 32px;
}

.cta-card {
    padding: 48px 40px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--card-radius);
    text-align: center;
    transition: all var(--transition-base);
}

.cta-card:hover {
    transform: translateY(-8px);
    border-color: var(--accent-cyan);
    box-shadow: 0 16px 48px rgba(0, 217, 255, 0.15);
}

.cta-icon {
    font-size: 48px;
    margin-bottom: 24px;
}

.cta-card h3 {
    font-size: 24px;
    margin-bottom: 16px;
}

.cta-card p {
    color: var(--text-secondary);
    margin-bottom: 32px;
    line-height: 1.7;
}

.btn-outline {
    background: transparent;
    color: var(--accent-cyan);
    border: 2px solid var(--accent-cyan);
    padding: 14px 28px;
}

.btn-outline:hover {
    background: var(--accent-cyan);
    color: var(--bg-primary);
    transform: translateY(-2px);
}

/* ============================================
   Footer
   ============================================ */
.footer {
    background: var(--primary-dark);
    border-top: 1px solid var(--border-color);
    padding: 80px 0 32px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 60px;
    margin-bottom: 60px;
}

.footer-logo {
    font-family: var(--font-mono);
    font-weight: 700;
    font-size: 18px;
    margin-bottom: 16px;
}

.footer-tagline {
    color: var(--text-secondary);
    margin-bottom: 24px;
}

.social-links {
    display: flex;
    gap: 16px;
}

.social-links a {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-secondary);
    transition: all var(--transition-base);
}

.social-links a:hover {
    background: var(--primary-blue);
    border-color: var(--primary-blue);
    color: var(--text-primary);
}

.social-links svg {
    width: 20px;
    height: 20px;
}

.footer-col h4 {
    font-size: 14px;
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 20px;
    color: var(--text-primary);
}

.footer-col ul {
    list-style: none;
}

.footer-col li {
    margin-bottom: 12px;
}

.footer-col a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 14px;
    transition: color var(--transition-fast);
}

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

.contact-info {
    font-size: 14px;
    color: var(--text-secondary);
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 32px;
    border-top: 1px solid var(--border-color);
}

.footer-bottom p {
    color: var(--text-muted);
    font-size: 14px;
}

.footer-links {
    display: flex;
    gap: 32px;
}

.footer-links a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 13px;
    transition: color var(--transition-fast);
}

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

/* ============================================
   Responsive Design
   ============================================ */
@media (max-width: 968px) {
    :root {
        --section-padding: 80px;
    }
    
    .hero-container {
        grid-template-columns: 1fr;
        gap: 60px;
    }
    
    .hero-visual {
        order: -1;
        max-width: 400px;
        margin: 0 auto;
    }
    
    .hero-stats {
        justify-content: center;
    }
    
    .research-card {
        min-width: calc(50% - 16px);
    }
    
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 40px;
    }
}

@media (max-width: 768px) {
    .nav-links {
        position: fixed;
        top: 76px;
        right: -100%;
        width: 280px;
        height: calc(100vh - 76px);
        background: var(--primary-dark);
        flex-direction: column;
        padding: 40px 24px;
        gap: 24px;
        align-items: flex-start;
        transition: right var(--transition-base);
        border-left: 1px solid var(--border-color);
    }
    
    .nav-links.active {
        right: 0;
    }
    
    .mobile-toggle {
        display: flex;
    }
    
    .mobile-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translateY(8px);
    }
    
    .mobile-toggle.active span:nth-child(2) {
        opacity: 0;
    }
    
    .mobile-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translateY(-8px);
    }
    
    .hero-cta {
        flex-direction: column;
    }
    
    .hero-stats {
        flex-wrap: wrap;
        gap: 32px;
    }
    
    .research-carousel {
        padding: 0 40px;
    }
    
    .research-card {
        min-width: 100%;
    }
    
    .mission-features {
        grid-template-columns: 1fr;
    }
    
    .cta-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: 20px;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .hero {
        min-height: auto;
        padding: 120px 0 60px;
    }
    
    .carousel-btn {
        width: 36px;
        height: 36px;
        font-size: 18px;
    }
    
    .research-carousel {
        padding: 0 30px;
    }
}