:root {
    /* --- LETHAL INDUSTRIAL PALETTE --- */
    --bg-color: #050505;        /* Deepest Black */
    --card-bg: #0a0a0a;         /* Slightly lighter */
    --text-primary: #e0e0e0;
    --text-dim: #888888;
    --accent: #ff4500;          /* Safety Orange */
    --success: #00ff41;         /* Terminal Green */
    --danger: #ff0033;          /* Classified Red */
    --border-color: #333333;
    --grid-line: rgba(255, 255, 255, 0.05);

    /* --- TYPOGRAPHY --- */
    --font-mono: 'Space Mono', 'Roboto Mono', monospace;
}

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

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    font-family: var(--font-mono);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;

    /* Technical Graph Paper Effect */
    background-image:
        linear-gradient(var(--grid-line) 1px, transparent 1px),
        linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
    background-size: 40px 40px;
}

a {
    color: inherit;
    text-decoration: none;
}

ul {
    list-style: none;
}

/* --- LAYOUT UTILITIES --- */
body > header,
body > nav,
body > main,
body > footer {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* --- HERO SECTION --- */
#hero {
    padding-top: 4rem;
    padding-bottom: 3rem;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 2rem;
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

@media (min-width: 768px) {
    #hero {
        flex-direction: row;
        justify-content: space-between;
        align-items: flex-end;
    }

    .hero-right {
        text-align: right;
        display: flex;
        flex-direction: column;
        align-items: flex-end;
    }
}

#hero h1 {
    font-size: 2.5rem;
    text-transform: uppercase;
    letter-spacing: -2px;
    margin-bottom: 0.5rem;
}

#hero .tagline {
    color: var(--text-dim);
    font-size: 1rem;
    margin-bottom: 1.5rem;
}

#hero .social-links a {
    margin-right: 1.5rem;
    font-size: 0.9rem;
    border-bottom: 1px solid transparent;
    transition: all 0.2s ease;
}

#hero .social-links a:hover {
    color: var(--accent);
    border-bottom-color: var(--accent);
}

/* --- FILTERS --- */
#filters {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.filter-btn {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-dim);
    font-family: var(--font-mono);
    padding: 0.5rem 1.2rem;
    cursor: pointer;
    text-transform: uppercase;
    font-size: 0.85rem;
    transition: all 0.2s ease; /* Smooth transition for buttons */
}

.filter-btn:hover,
.filter-btn.active {
    background-color: var(--accent);
    color: var(--bg-color);
    border-color: var(--accent);
    font-weight: 700;
}

/* --- PROJECT GRID --- */
#project-grid {
    display: grid;
    grid-template-columns: 1fr; /* Mobile First: 1 col */
    gap: 2rem;
    margin-bottom: 4rem;
}

@media (min-width: 768px) {
    #project-grid {
        grid-template-columns: 1fr 1fr; /* Desktop: 2 cols */
    }
}

/* --- PROJECT CARDS --- */
.project-card {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    padding: 1.5rem;
    position: relative;
    display: flex;
    flex-direction: column;
    /* Instant hover effect required (no transition on border) */
}

.project-card:hover {
    border-color: var(--accent);
    background-color: #0f0f0f; /* Slight lighten */
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 1rem;
}

.project-id {
    font-size: 0.75rem;
    color: var(--text-dim);
    opacity: 0.5;
}

.status-badge {
    font-size: 0.7rem;
    text-transform: uppercase;
    padding: 2px 6px;
    border: 1px solid currentColor;
    letter-spacing: 1px;
}

.status-badge.public {
    color: var(--success);
    border-color: var(--success);
    box-shadow: 0 0 5px rgba(0, 255, 65, 0.2);
}

.status-badge.classified {
    color: var(--danger);
    border-color: var(--danger);
    box-shadow: 0 0 5px rgba(255, 0, 51, 0.2);
}

.project-card h3 {
    font-size: 1.25rem;
    margin-bottom: 0.75rem;
    text-transform: uppercase;
    letter-spacing: -1px;
}

.project-card p {
    color: var(--text-dim);
    font-size: 0.9rem;
    margin-bottom: 1.5rem;
    flex-grow: 1;
}

.project-links {
    margin-top: auto;
}

.btn-link {
    display: inline-block;
    color: var(--accent);
    font-weight: 700;
    text-decoration: none;
    text-transform: uppercase;
    font-size: 0.9rem;
}

.btn-link:hover {
    text-decoration: underline;
}

/* --- RESPONSIVE UTILS --- */
@media (max-width: 768px) {
    body {
        font-size: 14px;
    }

    #hero h1 {
        font-size: 1.8rem;
    }
}

/* --- SCANLINE OVERLAY EFFECT --- */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: repeating-linear-gradient(
        0deg,
        rgba(0, 0, 0, 0.15),
        rgba(0, 0, 0, 0.15) 1px,
        transparent 1px,
        transparent 2px
    );
    pointer-events: none;
    z-index: 999;
}

/* --- CARD REVEAL ANIMATION --- */
.project-card {
    animation: cardReveal 0.4s ease-out forwards;
    opacity: 0;
}

@keyframes cardReveal {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* --- PROJECT TAGS --- */
.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.tag {
    font-size: 0.7rem;
    color: var(--text-dim);
    background: rgba(255, 255, 255, 0.03);
    padding: 3px 8px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* --- FOOTER STATUS BAR --- */
footer {
    border-top: 1px solid var(--border-color);
    padding: 1.5rem 0;
    margin-top: 4rem;
}

.status-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.75rem;
    color: var(--text-dim);
    font-family: var(--font-mono);
    text-transform: uppercase;
    letter-spacing: 1px;
    flex-wrap: wrap;
    gap: 1rem;
}

.sys-indicator .value {
    color: var(--success);
    font-weight: 700;
}

.build-info {
    opacity: 0.6;
}

.uptime #uptime {
    color: var(--accent);
    font-weight: 700;
}