/* --- CSS VARIABLES --- */
:root {
    --bg-color: #02050a; /* Dark background */
    --cyan-glow: #0ff;    /* Neon Cyan */
    --magenta-glow: #f0f; /* Neon Magenta */
    --text-primary: #fff; /* White text */
    --text-secondary: #aaa; /* Lighter text */
    --glass-bg: rgba(255, 255, 255, 0.05); /* Semi-transparent background for glassmorphism */
    --glass-border: rgba(255, 255, 255, 0.1);
    --transition: all 0.3s ease;
    
    /* Typography */
    --font-heading: 'Audiowide', cursive; /* Futuristic font */
    --font-body: 'Rajdhani', sans-serif;    /* Clean body font */
}

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

html {
    scroll-behavior: smooth; /* Smooth scrolling for anchor links */
    font-size: 16px;
    color: var(--text-primary);
    background-color: var(--bg-color);
    font-family: var(--font-body);
}

body {
    overflow-x: hidden; /* Prevent horizontal scroll */
    background-image: 
        radial-gradient(circle at 10% 20%, rgba(0, 255, 255, 0.05) 0%, transparent 20%),
        radial-gradient(circle at 90% 80%, rgba(255, 0, 255, 0.05) 0%, transparent 20%);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

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

ul {
    list-style: none;
}

/* --- REUSABLE STYLES --- */
.section-title {
    font-family: var(--font-heading);
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 50px;
    text-transform: uppercase;
}

.glow-text {
    text-shadow: 0 0 10px var(--cyan-glow);
}

.glass {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(10px);
    border-radius: 10px;
}

.status-text {
    color: var(--cyan-glow);
    letter-spacing: 2px;
    font-weight: 600;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 12px 24px;
    font-family: var(--font-heading);
    border-radius: 5px;
    font-size: 0.9rem;
    text-transform: uppercase;
    cursor: pointer;
    transition: var(--transition);
}

.btn-primary {
    background-color: transparent;
    border: 2px solid var(--cyan-glow);
    color: var(--cyan-glow);
    box-shadow: 0 0 10px rgba(0, 255, 255, 0.3);
}

.btn-primary:hover {
    background-color: var(--cyan-glow);
    color: var(--bg-color);
    box-shadow: 0 0 20px var(--cyan-glow);
}

.btn-secondary {
    background-color: transparent;
    border: 2px solid var(--text-primary);
    color: var(--text-primary);
}

.btn-secondary:hover {
    background-color: var(--text-primary);
    color: var(--bg-color);
}

/* --- NAVBAR STYLES --- */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    height: 80px;
    background: rgba(2, 5, 10, 0.9);
    backdrop-filter: blur(5px);
    border-bottom: 1px solid var(--glass-border);
    z-index: 1000;
}

.navbar-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 100%;
}

.logo {
    font-family: var(--font-heading);
    font-size: 1.8rem;
    color: var(--cyan-glow);
    text-shadow: 0 0 10px var(--cyan-glow);
}

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

.nav-links a {
    text-transform: uppercase;
    font-size: 0.9rem;
    font-weight: 600;
}

.nav-links a:hover {
    color: var(--cyan-glow);
    text-shadow: 0 0 5px var(--cyan-glow);
}

.menu-toggle {
    display: none;
    cursor: pointer;
}

.menu-toggle .bar {
    display: block;
    width: 25px;
    height: 3px;
    margin: 5px auto;
    background-color: var(--text-primary);
    transition: var(--transition);
}

/* --- HERO SECTION STYLES --- */
.hero {
    position: relative;
    height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 80px; /* Space for fixed navbar */
}

/* Cyber Grid Background */
.cyber-grid {
    position: absolute;
    top: 0; left: 0; width: 100%; height: 100%;
    background-image: 
        linear-gradient(rgba(0, 255, 255, 0.1) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 255, 255, 0.1) 1px, transparent 1px);
    background-size: 50px 50px;
    z-index: -1;
}

.hero-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    align-items: center;
    gap: 50px;
}

.hero-heading {
    font-family: var(--font-heading);
    font-size: 4rem;
    line-height: 1.1;
    margin: 15px 0 25px;
}

.hero-description {
    color: var(--text-secondary);
    font-size: 1.1rem;
    margin-bottom: 35px;
    max-width: 500px;
}

.hero-btns {
    display: flex;
    gap: 20px;
}

.hero-visual {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
}

/* CSS Animated Cybernetic Core */
.core-outer {
    width: 200px; height: 200px;
    border: 4px solid var(--magenta-glow);
    border-radius: 50%;
    box-shadow: 0 0 20px var(--magenta-glow);
    display: flex; justify-content: center; align-items: center;
    animation: pulseCore 3s infinite alternate;
}

.core-inner {
    width: 100px; height: 100px;
    border: 4px solid var(--cyan-glow);
    border-radius: 50%;
    background-color: var(--cyan-glow);
    box-shadow: 0 0 30px var(--cyan-glow);
}

@keyframes pulseCore {
    0% { transform: scale(1); box-shadow: 0 0 20px var(--magenta-glow); }
    100% { transform: scale(1.1); box-shadow: 0 0 40px var(--magenta-glow); }
}

/* Data Cards */
.data-card {
    position: absolute;
    padding: 10px 15px;
    font-size: 0.8rem;
    color: var(--text-primary);
}

.card-1 { top: -20px; left: 50px; border-left: 3px solid var(--cyan-glow); }
.card-2 { bottom: -20px; right: 50px; border-right: 3px solid var(--magenta-glow); }

/* --- SYSTEMS SECTION STYLES --- */
.systems {
    padding: 100px 0;
}

.systems-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.system-card {
    padding: 30px;
    text-align: center;
    transition: var(--transition);
}

.system-card:hover {
    transform: translateY(-10px);
    border-color: var(--cyan-glow);
    box-shadow: 0 0 20px rgba(0, 255, 255, 0.3);
}

.card-num {
    font-family: var(--font-heading);
    font-size: 0.8rem;
    color: var(--glass-border);
}

.icon {
    display: block;
    font-size: 3rem;
    margin: 20px 0;
}

.system-card h3 {
    font-family: var(--font-heading);
    margin-bottom: 15px;
    font-size: 1.2rem;
}

.system-card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 25px;
    line-height: 1.6;
}

.card-link {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--cyan-glow);
}

/* --- ABOUT SECTION STYLES --- */
.about {
    padding: 100px 0;
}

.about-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: center;
}

.about-content p {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 40px;
}

.about-stats {
    display: flex;
    gap: 30px;
}

.stat-item { text-align: center; }
.stat-num {
    display: block;
    font-family: var(--font-heading);
    font-size: 2rem;
    color: var(--cyan-glow);
}
.stat-label { font-size: 0.8rem; color: var(--text-secondary); }

/* Terminal Styling */
.about-terminal {
    font-family: 'Courier New', Courier, monospace;
    padding: 30px;
    color: #4f4; /* Terminal Green */
    font-size: 0.9rem;
}

.terminal-cursor {
    animation: blink 1s infinite;
}

@keyframes blink { 50% { opacity: 0; } }

/* --- CTA SECTION STYLES --- */
.cta {
    padding: 100px 0;
}

.cta-container {
    padding: 60px;
    text-align: center;
}

.cta #cta-message { margin-top: 20px; font-weight: bold; }
.hidden { display: none; }

/* --- FOOTER STYLES --- */
.footer {
    padding: 50px 0;
    border-top: 1px solid var(--glass-border);
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.footer-logo {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    color: var(--glass-border);
    margin-bottom: 15px;
}

/* --- RESPONSIVE MEDIA QUERIES --- */

/* Tablet & Mobile (up to 992px) */
@media (max-width: 992px) {
    .hero-heading { font-size: 3rem; }
    .hero-container, .about-container { grid-template-columns: 1fr; text-align: center; gap: 60px; }
    .hero-content, .hero-description { margin-left: auto; margin-right: auto; }
    .hero-btns { justify-content: center; }
    .about-content { margin-bottom: 40px; }
    .about-stats { justify-content: center; }
}

/* Mobile (up to 768px) */
@media (max-width: 768px) {
    html { font-size: 14px; }
    
    .nav-links {
        position: absolute;
        right: 0px;
        height: 92vh;
        top: 80px;
        background-color: var(--bg-color);
        border-left: 1px solid var(--glass-border);
        display: flex;
        flex-direction: column;
        align-items: center;
        width: 60%;
        transform: translateX(100%);
        transition: transform 0.5s ease-in;
        padding-top: 50px;
    }
    
    .nav-links li { opacity: 0; }
    
    .menu-toggle { display: block; }
    
    .hero-heading { font-size: 2.5rem; }
}

/* JavaScript Class to toggle mobile menu */
.nav-active { transform: translateX(0%); }

/* Fade-in animation for nav links on mobile */
@keyframes navLinkFade {
    from { opacity: 0; transform: translateX(50px); }
    to { opacity: 1; transform: translateX(0px); }
}

/* Hamburger animation */
.toggle .bar:nth-child(1) { transform: rotate(-45deg) translate(-5px, 6px); }
.toggle .bar:nth-child(2) { opacity: 0; }
.toggle .bar:nth-child(3) { transform: rotate(45deg) translate(-5px, -6px); }