:root {
    /* Colors */
    --bg-dark: #0A0A0F;
    --bg-black: #000000;
    --bg-card: #14141A;

    --text-white: #FFFFFF;
    --text-gray: #E0E0E0;
    --text-muted: #A0A0A0;

    --accent-blue: #00BFFF;
    --accent-silver: #C0C0C0;
    --accent-green: #00FF9D;
    --accent-gold: #FFD700;

    /* Fonts */
    --font-main: 'Inter', sans-serif;
    --font-mono: 'Roboto Mono', monospace;

    /* Spacing */
    --container-width: 1200px;
    --section-padding: 80px 20px;

    /* Effects */
    --glow-blue: 0 0 15px rgba(0, 191, 255, 0.4);
    --glass-bg: rgba(20, 20, 26, 0.7);
    --glass-border: 1px solid rgba(255, 255, 255, 0.1);
}

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

html {
    scroll-behavior: smooth;
}

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

h1,
h2,
h3,
h4 {
    color: var(--text-white);
    font-weight: 700;
}

a {
    transition: color 0.3s ease;
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
}

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 20px;
}

/* Typography & Buttons */
.btn-primary {
    display: inline-block;
    background-color: transparent;
    border: 1px solid var(--accent-blue);
    color: var(--accent-blue);
    padding: 12px 30px;
    font-family: var(--font-mono);
    text-transform: uppercase;
    font-weight: 600;
    letter-spacing: 1px;
    transition: all 0.3s ease;
    box-shadow: 0 0 10px rgba(0, 191, 255, 0.1);
}

.btn-primary:hover {
    background-color: var(--accent-blue);
    color: var(--bg-black);
    box-shadow: var(--glow-blue);
}

.btn-primary.large {
    padding: 16px 40px;
    font-size: 1.1rem;
}

/* Navigation */
.main-nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(10, 10, 15, 0.85);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.nav-container {
    max-width: var(--container-width);
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-family: var(--font-mono);
    font-weight: 700;
    color: var(--accent-blue);
    font-size: 1.2rem;
    letter-spacing: 2px;
}

.logo-icon {
    width: 24px;
    height: 24px;
}

.nav-links {
    display: flex;
    gap: 30px;
}

.nav-links a {
    font-size: 0.9rem;
    font-family: var(--font-mono);
    color: var(--text-gray);
    position: relative;
}

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

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 1px;
    background-color: var(--accent-blue);
    transition: width 0.3s ease;
}

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

.btn-cta-nav {
    border: 1px solid var(--text-white);
    padding: 8px 16px;
    font-size: 0.85rem;
    font-family: var(--font-mono);
    color: var(--text-white);
}

.btn-cta-nav:hover {
    background: var(--text-white);
    color: var(--bg-black);
}

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

.mobile-menu-btn span {
    display: block;
    width: 25px;
    height: 2px;
    background-color: var(--text-white);
    transition: all 0.3s ease;
}

/* Hero Section */
.hero-section {
    position: relative;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 0 20px;
    overflow: hidden;
}

.hero-bg-container {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
}

.hero-bg-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.6;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at center, rgba(10, 10, 15, 0.4) 0%, rgba(10, 10, 15, 0.95) 100%);
}

.hero-content {
    max-width: 800px;
    z-index: 1;
}

.glitch-text {
    font-size: 4rem;
    font-family: var(--font-mono);
    letter-spacing: 5px;
    color: var(--text-white);
    margin-bottom: 20px;
    text-shadow: 0 0 10px rgba(0, 191, 255, 0.5);
}

.hero-subtitle {
    font-size: 1.5rem;
    margin-bottom: 20px;
    color: var(--accent-blue);
    font-weight: 300;
}

.hero-description {
    font-size: 1.1rem;
    max-width: 600px;
    margin: 0 auto 40px;
    color: var(--text-gray);
}

/* Laboratory Section (Cards) */
.lab-section {
    padding: var(--section-padding);
    background-color: var(--bg-black);
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-header h2 {
    font-size: 2.5rem;
    font-family: var(--font-mono);
    margin-bottom: 10px;
    background: linear-gradient(90deg, #FFF, #AAA);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.section-subtitle {
    font-size: 1.1rem;
    color: var(--accent-blue);
}

.lab-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    max-width: var(--container-width);
    margin: 0 auto;
}

.lab-card {
    background: var(--bg-card);
    border: var(--glass-border);
    padding: 30px;
    border-radius: 4px;
    transition: transform 0.3s ease, border-color 0.3s ease;
    position: relative;
    overflow: hidden;
    height: 100%;
}

.lab-card-link {
    display: block;
    text-decoration: none;
    color: inherit;
}

.lab-card-link:hover .lab-card {
    transform: translateY(-5px);
    border-color: var(--accent-blue);
}

.card-icon-wrapper {
    margin-bottom: 20px;
    height: 60px;
}

.card-icon {
    width: 60px;
    height: 60px;
    object-fit: contain;
}

.lab-card h3 {
    font-family: var(--font-mono);
    margin-bottom: 15px;
    color: var(--text-white);
    font-size: 1.25rem;
}

.lab-card p {
    color: var(--text-muted);
    font-size: 0.95rem;
    margin-bottom: 20px;
}

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

.card-tags span {
    font-size: 0.75rem;
    border: 1px solid rgba(255, 255, 255, 0.1);
    padding: 4px 10px;
    border-radius: 20px;
    color: var(--accent-silver);
    font-family: var(--font-mono);
}

/* Audience Section */
.audience-section {
    padding: var(--section-padding);
    background: var(--bg-dark);
}

.audience-section h2 {
    text-align: center;
    margin-bottom: 50px;
    font-family: var(--font-mono);
    font-size: 2rem;
}

.audience-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    max-width: 900px;
    margin: 0 auto;
}

.audience-list li {
    background: rgba(255, 255, 255, 0.03);
    padding: 20px;
    display: flex;
    align-items: center;
    gap: 15px;
    border-left: 3px solid var(--accent-blue);
}

.check-icon {
    color: var(--accent-blue);
    font-weight: bold;
}

.audience-text {
    font-size: 1.05rem;
}

/* CTA Section */
.final-cta-section {
    padding: 100px 20px;
    text-align: center;
    background: linear-gradient(rgba(0, 0, 0, 0.8), rgba(0, 0, 0, 0.8)), url('assets/hero-banner.png');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
}

.final-cta-section h2 {
    font-size: 3rem;
    margin-bottom: 10px;
    text-shadow: 0 4px 10px rgba(0, 0, 0, 0.8);
}

.final-cta-section p {
    font-size: 1.2rem;
    margin-bottom: 30px;
    color: var(--text-gray);
}

/* Contact Section */
.contact-section {
    padding: var(--section-padding);
    background-color: var(--bg-black);
}

.cyber-form {
    max-width: 600px;
    margin: 0 auto;
    background: var(--bg-card);
    padding: 40px;
    border: var(--glass-border);
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-family: var(--font-mono);
    font-size: 0.9rem;
    color: var(--accent-blue);
}

.cyber-form input[type="text"],
.cyber-form input[type="email"],
.cyber-form textarea {
    width: 100%;
    padding: 12px;
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid #333;
    color: var(--text-white);
    font-family: var(--font-main);
    transition: border-color 0.3s;
}

.cyber-form input:focus,
.cyber-form textarea:focus {
    outline: none;
    border-color: var(--accent-blue);
}

.form-check {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 20px;
    font-size: 0.9rem;
}

.form-check a {
    color: var(--accent-blue);
    text-decoration: underline;
}

.btn-submit {
    width: 100%;
    padding: 14px;
    background: var(--accent-blue);
    color: var(--bg-black);
    border: none;
    font-family: var(--font-mono);
    font-weight: 700;
    cursor: pointer;
    text-transform: uppercase;
    transition: all 0.3s;
}

.btn-submit:hover {
    background: var(--text-white);
}

/* Footer */
.main-footer {
    padding: 50px 20px;
    background-color: #050508;
    border-top: 1px solid #1a1a1a;
    text-align: center;
}

.footer-logo {
    font-family: var(--font-mono);
    font-size: 1.5rem;
    color: var(--text-white);
    margin-bottom: 10px;
    letter-spacing: 2px;
}

.footer-motto {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 20px;
}

.footer-links {
    margin-bottom: 20px;
}

.footer-links a {
    color: var(--text-gray);
    margin: 0 10px;
    font-size: 0.85rem;
}

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

.copyright {
    color: #555;
    font-size: 0.8rem;
    font-family: var(--font-mono);
}

/* Responsive */
@media (max-width: 768px) {
    .nav-links {
        display: none;
        /* simple hidden for now, script will handle toggle */
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: var(--bg-dark);
        flex-direction: column;
        padding: 20px;
        text-align: center;
        border-bottom: 1px solid #333;
    }

    .nav-links.nav-active {
        display: flex;
    }

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

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

    .glitch-text {
        font-size: 2.5rem;
    }

    .hero-bg-img {
        object-position: 70% center;
        /* Focus on profile */
    }
}