:root {
    --bg: var(--bg-color, #080c08);
    --surface: rgba(10, 18, 10, 0.85);
    --surface-alt: rgba(20, 30, 20, 0.9);
    --border: var(--border-color, #1e2e1e);
    --text: var(--text-color, #d4e0d4);
    --muted: var(--muted-color, #6b7a6b);
    --accent: var(--accent-color, #3d5c3d);
    --accent-2: #4ade80;
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    --max-width: 1100px;
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(10px);
    background: rgba(8, 12, 8, 0.8);
    border-bottom: 1px solid var(--border);
    padding: 1rem 0;
}

.site-header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 2rem;
}

.logo {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    font-family: var(--font-mono);
    color: var(--text);
    text-decoration: none;
}

.logo-icon {
    width: 1.2rem;
    height: 1.2rem;
    color: var(--accent-2);
}

.nav-links {
    display: flex;
    gap: 1.5rem;
}

.nav-links a {
    color: var(--muted);
    font-size: 0.8rem;
    text-transform: uppercase;
    text-decoration: none;
    transition: color 0.2s;
}

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

.hero {
    padding: 4rem 0 2rem;
}

.hero h1 {
    font-size: 3rem;
    line-height: 1.1;
    margin-bottom: 1rem;
}

.hero p {
    color: var(--muted);
    font-size: 1.1rem;
    max-width: 700px;
}

.seal {
    display: inline-block;
    margin-top: 1.5rem;
    padding: 0.4rem 1rem;
    border: 1px solid var(--accent);
    background: rgba(61, 92, 61, 0.1);
    color: var(--accent-2);
    font-size: 0.8rem;
    font-family: var(--font-mono);
}

.stats-bar {
    display: flex;
    gap: 2rem;
    padding: 1.5rem;
    background: var(--surface);
    border: 1px solid var(--border);
    margin: 2rem 0;
}

.stats-bar div {
    color: var(--muted);
    font-size: 0.9rem;
}

.stats-bar strong {
    color: var(--text);
    font-family: var(--font-mono);
}

.search-section {
    margin-bottom: 2rem;
}

.search-box {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    background: var(--surface);
    border: 1px solid var(--border);
    margin-bottom: 1.5rem;
}

.search-box svg {
    width: 1.2rem;
    height: 1.2rem;
    color: var(--muted);
}

.search-box input {
    flex: 1;
    background: transparent;
    border: none;
    color: var(--text);
    font-family: var(--font-sans);
    font-size: 1rem;
    outline: none;
}

.filter-chips {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.filter-chip {
    padding: 0.3rem 0.8rem;
    border: 1px solid var(--border);
    background: rgba(0,0,0,0.3);
    color: var(--muted);
    font-size: 0.75rem;
    font-family: var(--font-mono);
    cursor: pointer;
    transition: all 0.2s;
}

.filter-chip:hover, .filter-chip.active {
    border-color: var(--accent-color);
    color: var(--text);
    background: var(--accent);
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
    margin-bottom: 4rem;
}

.skill-card {
    background: var(--surface);
    border: 1px solid var(--border);
    padding: 1.5rem;
    transition: transform 0.2s, border-color 0.2s;
}

.skill-card:hover {
    border-color: var(--accent-color);
    transform: translateY(-2px);
}

.skill-domain {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--accent-2);
    text-transform: uppercase;
    margin-bottom: 0.5rem;
}

.skill-title {
    font-size: 1.2rem;
    margin-bottom: 0.75rem;
    color: var(--text);
}

.skill-description {
    font-size: 0.85rem;
    color: var(--muted);
    margin-bottom: 1rem;
}

.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
}

.skill-tag {
    font-size: 0.65rem;
    font-family: var(--font-mono);
    color: var(--muted);
    background: rgba(0,0,0,0.2);
    padding: 0.1rem 0.4rem;
    border: 1px solid var(--border);
}

.site-footer {
    border-top: 1px solid var(--border);
    padding: 3rem 0;
    text-align: center;
}

.footer-seal {
    font-family: var(--font-mono);
    font-weight: 700;
    color: var(--text);
    letter-spacing: 0.2em;
    margin-bottom: 0.5rem;
}

.footer-copy {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--muted);
}

@media (max-width: 768px) {
    .hero h1 { font-size: 2rem; }
    .stats-bar { flex-direction: column; gap: 0.5rem; }
}