/* ============================================================
   FILE: 05-navbar.css
   ROLE: Navbar + Search Overlay + Language Selector + Mobile Menu
   PROJECT: BarakatHub — پلتفرم رسانه‌ای چندزبانه
   VERSION: 1.0.0
   DEPENDS ON: 01-tokens.css, 04-components.css
   ============================================================ */

/* ════════════════════════════════════════════════════════════
   NAVBAR
   ════════════════════════════════════════════════════════════ */
.navbar {
  position: fixed;
  top: 0;
  inset-inline: 0;
  height: var(--navbar-height);
  z-index: var(--z-fixed);
  background-color: var(--bg-base);
  border-bottom: 1px solid var(--border-color);
  transition:
    background-color var(--transition-base),
    box-shadow var(--transition-base),
    border-color var(--transition-base);
}

.navbar--scrolled {
  box-shadow: var(--shadow-md);
  background-color: var(--bg-surface);
}

.navbar__inner {
  height: var(--navbar-height);
}

/* ── Logo ── */
.navbar__logo {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  color: var(--text-primary);
}

.navbar__brand {
  font-family: var(--font-rtl-display);
  font-size: var(--text-lg);
  font-weight: var(--weight-bold);
  color: var(--color-primary-600);
  letter-spacing: -0.01em;
}

:lang(en) .navbar__brand,
:lang(tr) .navbar__brand,
:lang(ru) .navbar__brand,
:lang(az) .navbar__brand {
  font-family: var(--font-ltr-display);
}

/* ── Nav Links ── */
.navbar__links {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  list-style: none;
}

.navbar__link {
  display: inline-flex;
  align-items: center;
  padding: var(--space-2) var(--space-3);
  color: var(--text-secondary);
  text-decoration: none;
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.navbar__link:hover,
.navbar__link--active {
  color: var(--color-primary-600);
  background-color: var(--color-primary-50);
}

[data-theme="dark"] .navbar__link:hover,
[data-theme="dark"] .navbar__link--active {
  background-color: var(--color-primary-900);
}

/* ── Actions ── */
.navbar__actions {
  align-items: center;
}

/* ── Language Selector ── */
.lang-selector {
  position: relative;
}

.lang-selector__trigger {
  gap: var(--space-1);
  font-size: var(--text-xs);
}

.lang-selector__dropdown {
  position: absolute;
  top: calc(100% + var(--space-2));
  inset-inline-end: 0;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  min-width: 200px;
  z-index: var(--z-dropdown);
  overflow: hidden;
  list-style: none;
  animation: scaleIn 0.2s var(--transition-spring);
}

.lang-selector__option {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  width: 100%;
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-sm);
  color: var(--text-secondary);
  background: transparent;
  border: none;
  cursor: pointer;
  transition: background-color var(--transition-fast), color var(--transition-fast);
  text-align: start;
}

.lang-selector__option:hover {
  background-color: var(--bg-surface-2);
  color: var(--text-primary);
}

.lang-selector__option--active {
  color: var(--color-primary-600);
  font-weight: var(--weight-semibold);
  background-color: var(--color-primary-50);
}

[data-theme="dark"] .lang-selector__option--active {
  background-color: var(--color-primary-900);
}

/* ── Mobile Menu ── */
.navbar__mobile {
  background-color: var(--bg-surface);
  border-top: 1px solid var(--border-color);
  padding: var(--space-4) 0;
  box-shadow: var(--shadow-lg);
}

.navbar__mobile ul {
  list-style: none;
}

.navbar__mobile .navbar__link {
  display: block;
  padding: var(--space-3) var(--space-6);
  font-size: var(--text-base);
  border-radius: 0;
}

/* ════════════════════════════════════════════════════════════
   SEARCH OVERLAY
   ════════════════════════════════════════════════════════════ */
.search-overlay {
  position: fixed;
  top: 0;
  inset-inline: 0;
  background-color: var(--bg-base);
  border-bottom: 2px solid var(--color-primary-500);
  z-index: calc(var(--z-fixed) + 1);
  padding-block: var(--space-4);
  box-shadow: var(--shadow-xl);
  animation: fadeIn 0.2s ease;
}

.search-overlay__inner {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.search-overlay__input {
  flex: 1;
  font-size: var(--text-lg);
  border: none;
  background: transparent;
  color: var(--text-primary);
  outline: none;
  padding-block: var(--space-3);
}

.search-overlay__input::placeholder {
  color: var(--text-muted);
}