/* ── NAV ── */
nav {
    position: fixed; top: 0; left: 0; right: 0; z-index: 100;
    display: flex; align-items: center; justify-content: space-between;
    padding: 0 6vw;
    height: 64px;
    background: rgba(13,13,13,0.85);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border);
}

.nav-logo {
    font-family: 'Orbitron', monospace;
    font-weight: 700;
    font-size: 0.95rem;
    color: var(--cyan);
    letter-spacing: 0.05em;
    text-decoration: none;
}

.nav-links {
    display: flex; gap: 2.4rem; list-style: none;
}

.nav-links a {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.78rem;
    color: var(--muted);
    text-decoration: none;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    transition: color 0.2s;
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute; bottom: -3px; left: 0; right: 0;
    height: 1px; background: var(--cyan);
    transform: scaleX(0); transform-origin: left;
    transition: transform 0.25s ease;
}

.nav-links a:hover { color: var(--cyan); }
.nav-links a:hover::after { transform: scaleX(1); }

.nav-links a.active { color: var(--cyan); }
.nav-links a:hover::after { transform: scaleX(1); }

.nav-cta {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.75rem;
    color: var(--cyan);
    border: 1px solid var(--cyan);
    padding: 0.4rem 1rem;
    border-radius: 3px;
    text-decoration: none;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    transition: background 0.2s, color 0.2s;
}

.nav-cta:hover { background: var(--cyan); color: var(--bg-deep); }