/* ═══════════════════════════════════════════════════════
   nav.css — Navigation Bar
═══════════════════════════════════════════════════════ */

#nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 500;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 2.5rem;
  background: rgba(17,17,20,0.92);
  border-bottom: 1px solid var(--border-strong);
  backdrop-filter: blur(12px);
  transition: background var(--duration), border-color var(--duration);
}

/* Film mode: Photo Viewer */
#nav.film-mode {
  background: rgba(14,14,17,0.96);
  border-color: rgba(255,255,255,0.05);
}

/* ── Logo ───────────────────────────────────────────── */
.nav-logo {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 1.05rem;
  font-weight: 400;
  color: var(--text-primary);
  cursor: pointer;
  letter-spacing: 0.02em;
  transition: color 0.2s;
  user-select: none;
}
.nav-logo:hover { color: var(--gray-200); }

/* ── Links ──────────────────────────────────────────── */
.nav-links {
  display: flex;
  align-items: center;
  gap: 2.2rem;
  list-style: none;
}

.nav-links a {
  font-family: var(--font-mono);
  font-size: 0.58rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--text-muted);
  cursor: pointer;
  transition: color 0.2s;
  padding-bottom: 3px;
  border-bottom: 1px solid transparent;
  transition: color 0.2s, border-color 0.2s;
}

.nav-links a:hover {
  color: var(--text-secondary);
  border-color: var(--border-strong);
}

.nav-links a.active {
  color: var(--text-primary);
  border-color: var(--text-primary);
}