/**
 * navbar.css
 * ─────────────────────────────────────────────────────────────
 * PURPOSE: Styles for the sticky top navigation bar.
 *          Nav items represent the AI pipeline stages.
 *
 * LOGIC: Uses glassmorphism for the navbar background.
 *        Active section is highlighted via JS scroll detection.
 *        The logo pulses subtly to suggest a live system.
 *
 * CUSTOMIZATION: Change --navbar-h in variables.css to resize.
 *                Add/remove nav items to match your sections.
 * ─────────────────────────────────────────────────────────────
 */

/* ── NAVBAR WRAPPER ────────────────────────────────────────── */
#navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--navbar-h);
  z-index: var(--z-sticky);
  transition: background var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
  border-bottom: 1px solid transparent;
}

/* Scrolled state — glass effect activates */
#navbar.scrolled {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border-bottom-color: var(--color-border);
  box-shadow: 0 4px 24px rgba(0,0,0,0.08);
}

.navbar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--container-wide);
  margin-inline: auto;
  padding-inline: var(--space-6);
  gap: var(--space-6);
}

/* ── LOGO ──────────────────────────────────────────────────── */
.navbar__logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  flex-shrink: 0;
}

.navbar__logo-icon {
  width: 36px;
  height: 36px;
  background: var(--gradient-primary);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  box-shadow: 0 4px 12px rgba(139, 92, 246, 0.4);
  animation: glow-pulse 3s ease-in-out infinite;
  position: relative;
  overflow: hidden;
}

.navbar__logo-icon::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,0.2), transparent);
}

.navbar__logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.navbar__logo-name {
  font-size: var(--text-sm);
  font-weight: var(--weight-bold);
  color: var(--color-text);
  letter-spacing: -0.02em;
}

.navbar__logo-version {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--color-primary);
  letter-spacing: 0.1em;
}

/* ── NAV LINKS ─────────────────────────────────────────────── */
.navbar__nav {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.navbar__link {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: var(--weight-medium);
  color: var(--color-text-muted);
  text-transform: lowercase;
  letter-spacing: 0.02em;
  transition: all var(--transition-fast);
  position: relative;
  white-space: nowrap;
}

.navbar__link .nav-index {
  font-size: 9px;
  color: var(--color-primary);
  opacity: 0.6;
}

.navbar__link:hover {
  color: var(--color-primary);
  background: rgba(139, 92, 246, 0.08);
}

.navbar__link.active {
  color: var(--color-primary);
  background: rgba(139, 92, 246, 0.12);
  font-weight: var(--weight-semibold);
}

/* Active indicator dot */
.navbar__link.active::after {
  content: '';
  position: absolute;
  bottom: 4px;
  left: 50%;
  transform: translateX(-50%);
  width: 4px;
  height: 4px;
  background: var(--color-primary);
  border-radius: 50%;
}

/* ── NAVBAR ACTIONS ────────────────────────────────────────── */
.navbar__actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-shrink: 0;
}

/* Command palette hint */
.navbar__cmd {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-3);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.navbar__cmd:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background: rgba(139, 92, 246, 0.06);
}

.navbar__cmd kbd {
  background: rgba(139, 92, 246, 0.1);
  color: var(--color-primary);
  padding: 1px 5px;
  border-radius: 4px;
  font-size: 10px;
}

/* Theme Toggle */
.theme-toggle {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  transition: all var(--transition-fast);
  cursor: pointer;
}

.theme-toggle:hover {
  background: rgba(139, 92, 246, 0.1);
  border-color: var(--color-primary);
  transform: rotate(20deg);
}

/* ── MOBILE MENU TOGGLE ────────────────────────────────────── */
.navbar__hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: var(--space-2);
  cursor: pointer;
  border-radius: var(--radius-md);
  transition: background var(--transition-fast);
}

.navbar__hamburger:hover { background: rgba(139,92,246,0.08); }

.navbar__hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: all var(--transition-base);
}

.navbar__hamburger.open span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}
.navbar__hamburger.open span:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}
.navbar__hamburger.open span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* ── MOBILE DRAWER ─────────────────────────────────────────── */
.navbar__mobile-menu {
  display: none;
  position: fixed;
  top: var(--navbar-h);
  left: 0;
  right: 0;
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-4);
  z-index: calc(var(--z-sticky) - 1);
  transform: translateY(-8px);
  opacity: 0;
  transition: all var(--transition-base);
  pointer-events: none;
}

.navbar__mobile-menu.open {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  transform: translateY(0);
  opacity: 1;
  pointer-events: all;
}

.navbar__mobile-menu .navbar__link {
  font-size: var(--text-sm);
  padding: var(--space-3) var(--space-4);
}

/* ── STATUS BAR (top edge of navbar) ──────────────────────── */
.navbar__status-bar {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--gradient-primary);
  transform-origin: left;
  transform: scaleX(0);
  transition: transform 0.1s linear;
}