/* ============================================
   HEADER - Topbar, Navigation, Mega Menu
   ============================================ */

/* ── Topbar ── */
.topbar {
  background: var(--bg-darker);
  color: var(--color-gray-400);
  font-size: var(--text-sm);
  height: var(--topbar-height);
  display: flex;
  align-items: center;
}

.topbar .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.topbar__left,
.topbar__right {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}

.topbar__item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--color-gray-400);
  transition: color var(--transition-fast) var(--ease-in-out);
}

.topbar__item:hover {
  color: var(--color-white);
}

.topbar__item .material-symbols-rounded {
  font-size: 16px;
}

.topbar__link {
  color: var(--color-gray-400);
  transition: color var(--transition-fast) var(--ease-in-out);
}

.topbar__link:hover {
  color: var(--color-white);
}

/* ── Header ── */
.header {
  background: var(--bg-primary);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  transition: box-shadow var(--transition-base) var(--ease-in-out);
}

.header--scrolled {
  box-shadow: var(--shadow-md);
}

.header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
}

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

.header__logo-img {
  height: 40px;
  width: auto;
}

.header__logo-text {
  font-size: var(--text-xl);
  font-weight: var(--font-bold);
  color: var(--text-primary);
  line-height: 1;
}

.header__logo-text span {
  color: var(--color-primary-dark);
}

/* ── Desktop Navigation ── */
.nav {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.nav__item {
  position: relative;
}

.nav__link {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-2) var(--space-3);
  color: var(--text-secondary);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast) var(--ease-in-out);
  white-space: nowrap;
}

.nav__link:hover,
.nav__link--active {
  color: var(--color-primary-dark);
  background: var(--color-primary-light);
}

.nav__link .material-symbols-rounded {
  font-size: 18px;
  transition: transform var(--transition-fast) var(--ease-in-out);
}

.nav__item:hover .nav__link .material-symbols-rounded {
  transform: rotate(180deg);
}

/* ── Mega Menu ── */
.nav__item--mega {
  position: static;
}

.nav__megamenu {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%) translateY(-8px);
  width: 100vw;
  max-width: var(--container-max);
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  padding: var(--space-8);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base) var(--ease-out);
  z-index: var(--z-dropdown);
}

.nav__item--mega:hover .nav__megamenu {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

.megamenu__header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-6);
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--border-color);
}

.megamenu__title {
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
  color: var(--text-primary);
  margin-bottom: 0;
}

.megamenu__grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: var(--space-4);
}

.megamenu__item {
  display: flex;
  gap: var(--space-4);
  padding: var(--space-4);
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  transition: all var(--transition-fast) var(--ease-in-out);
}

.megamenu__item:hover {
  background: var(--bg-secondary);
  border-color: var(--border-color);
}

.megamenu__item-image {
  width: 80px;
  height: 60px;
  border-radius: var(--radius-sm);
  object-fit: cover;
  flex-shrink: 0;
}

.megamenu__item-content {
  flex: 1;
  min-width: 0;
}

.megamenu__item-title {
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  color: var(--text-primary);
  margin-bottom: var(--space-1);
}

.megamenu__item-excerpt {
  font-size: var(--text-xs);
  color: var(--text-tertiary);
  line-height: var(--leading-snug);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 0;
}

/* ── Header CTA ── */
.header__cta {
  flex-shrink: 0;
}

/* ── Mobile Menu Toggle ── */
.header__mobile-toggle {
  display: none;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  color: var(--text-primary);
  transition: background var(--transition-fast) var(--ease-in-out);
}

.header__mobile-toggle:hover {
  background: var(--bg-secondary);
}

.header__mobile-toggle .material-symbols-rounded {
  font-size: 28px;
}

/* ── Mobile Navigation Overlay ── */
.mobile-nav {
  position: fixed;
  top: 0;
  right: -100%;
  width: 100%;
  max-width: 400px;
  height: 100vh;
  background: var(--bg-primary);
  z-index: var(--z-overlay);
  transition: right var(--transition-slow) var(--ease-smooth);
  overflow-y: auto;
  box-shadow: var(--shadow-2xl);
}

.mobile-nav--open {
  right: 0;
}

.mobile-nav__header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-4) var(--space-6);
  border-bottom: 1px solid var(--border-color);
}

.mobile-nav__close {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  color: var(--text-secondary);
}

.mobile-nav__close:hover {
  background: var(--bg-secondary);
}

.mobile-nav__list {
  padding: var(--space-4);
}

.mobile-nav__item {
  border-bottom: 1px solid var(--border-color);
}

.mobile-nav__link {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-4);
  color: var(--text-primary);
  font-weight: var(--font-medium);
  font-size: var(--text-base);
}

.mobile-nav__link:hover {
  color: var(--color-primary-dark);
}

.mobile-nav__submenu {
  padding-left: var(--space-4);
  display: none;
}

.mobile-nav__item--open .mobile-nav__submenu {
  display: block;
}

.mobile-nav__sublink {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  color: var(--text-secondary);
  font-size: var(--text-sm);
}

.mobile-nav__sublink:hover {
  color: var(--color-primary-dark);
}

.mobile-nav__cta {
  padding: var(--space-6);
}

/* ── Mobile Overlay Backdrop ── */
.mobile-nav-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.5);
  z-index: calc(var(--z-overlay) - 1);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base) var(--ease-in-out);
}

.mobile-nav-overlay--visible {
  opacity: 1;
  visibility: visible;
}