/* --- VARIABLES & THEME --- */
:root {
    /* Colors - Cyberpunk Academic */
    --bg-dark: #020617;
    /* Slate 950 */
    --bg-card: rgba(15, 23, 42, 0.6);
    /* Slate 900 Glass */
    --text-main: #e2e8f0;
    /* Slate 200 */
    --text-muted: #94a3b8;
    /* Slate 400 */

    --accent-primary: #06b6d4;
    /* Cyan Neon */
    --accent-secondary: #d4af37;
    /* Gold */
    --accent-glow: rgba(6, 182, 212, 0.5);

    /* Spacing */
    --nav-height: 80px;
    --section-spacing: 120px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--bg-dark);
    color: var(--text-main);
    font-family: 'Lato', sans-serif;
    overflow-x: hidden;
    line-height: 1.6;
    background-image:
        linear-gradient(rgba(6, 182, 212, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(6, 182, 212, 0.03) 1px, transparent 1px);
    background-size: 50px 50px;
    /* Grid Pattern */
}

/* --- TYPOGRAPHY --- */
h1,
h2,
h3,
h4,
.font-display {
    font-family: 'Orbitron', sans-serif;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

.font-serif {
    font-family: 'Cinzel', serif;
}

.font-mono {
    font-family: 'Fira Code', monospace;
}

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

/* --- UTILITIES --- */
.text-accent {
    color: var(--accent-primary);
}

.text-gold {
    color: var(--accent-secondary);
}

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

.glass-panel {
    background: var(--bg-card);
    backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.btn-neon {
    display: inline-block;
    padding: 12px 32px;
    background: transparent;
    border: 1px solid var(--accent-primary);
    color: var(--accent-primary);
    font-family: 'Orbitron', sans-serif;
    font-size: 0.8rem;
    letter-spacing: 0.2em;
    position: relative;
    overflow: hidden;
    transition: 0.3s;
    cursor: pointer;
}

.btn-neon:hover {
    background: var(--accent-primary);
    color: #000;
    box-shadow: 0 0 20px var(--accent-glow);
}

.active-nav {
    color: var(--accent-primary) !important;
    text-shadow: 0 0 8px var(--accent-glow);
}

/* --- LAYOUT --- */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

section {
    padding: var(--section-spacing) 0;
    position: relative;
}

/* --- NAVIGATION --- */
nav {
    position: fixed;
    top: 0;
    width: 100%;
    height: var(--nav-height);
    z-index: 1000;
    display: flex;
    align-items: center;
    border-bottom: 1px solid rgba(6, 182, 212, 0.1);
}

.nav-logo {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: 0.1em;
}

.nav-links {
    display: flex;
    gap: 3rem;
    margin-left: auto;
}

.nav-links a {
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.2em;
    color: var(--text-muted);
}

.nav-links a:hover {
    color: var(--accent-primary);
}

/* Mobile Nav */
.mobile-menu-btn {
    display: none;
    font-size: 1.5rem;
    color: var(--accent-secondary);
    cursor: pointer;
}

/* --- FOOTER --- */
footer {
    padding: 3rem 0;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    background: #000;
    text-align: center;
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* --- LOADER --- */
#loader {
    position: fixed;
    inset: 0;
    z-index: 9999;
    background-color: transparent;
    /* Changed from var(--bg-dark) to show canvas */
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    transition: opacity 0.8s ease-out, visibility 0.8s ease-out;
    overflow: hidden;
}

#loader .text-center {
    z-index: 10;
    background: rgba(2, 6, 23, 0.3);
    /* More transparent */
    padding: 3rem;
    border-radius: 1rem;
    backdrop-filter: blur(8px);
    border: 1px solid rgba(6, 182, 212, 0.1);
    /* Subtle Cyan Border */
    box-shadow: 0 0 30px rgba(0, 0, 0, 0.5);
    min-width: 300px;
}

#loader.hidden {
    opacity: 0;
    visibility: hidden;
}

.loader-bar {
    width: 0%;
    transition: width 0.2s linear;
}

.glitch-text {
    animation: glitch 1s infinite;
}

@keyframes glitch {
    0% {
        opacity: 1;
        transform: translateX(0);
    }

    2% {
        opacity: 0.8;
        transform: translateX(2px);
    }

    4% {
        opacity: 1;
        transform: translateX(0);
    }

    100% {
        opacity: 1;
    }
}

/* Media Queries */
@media (max-width: 768px) {
    .nav-links {
        position: fixed;
        top: var(--nav-height);
        left: 0;
        width: 100%;
        height: 0;
        overflow: hidden;
        background: var(--bg-dark);
        flex-direction: column;
        align-items: center;
        gap: 2rem;
        padding-top: 0;
        transition: 0.4s ease;
        border-bottom: 1px solid rgba(6, 182, 212, 0.1);
    }

    .nav-links.open {
        height: 300px;
        padding-top: 2rem;
    }

    .mobile-menu-btn {
        display: block;
        margin-left: auto;
    }
}