/* ============================================
   Header & Navigation Styles
   ============================================ */

/* --- Site Header --- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: var(--z-header);
  background: var(--color-secondary);
  transition: all var(--transition-base);
}

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

/* --- Utility Bar --- */
.header__utility {
  border-bottom: 1px solid var(--color-border);
}

.header__utility-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 44px;
}

.header__utility-left {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.header__utility-right {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.header__icon-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--color-text);
  font-family: var(--font-primary);
  font-size: var(--font-size-xs);
  letter-spacing: var(--letter-spacing-wide);
  text-transform: uppercase;
  padding: 4px;
  transition: opacity var(--transition-fast);
}

.header__icon-btn:hover {
  opacity: 0.6;
}

.header__icon-label {
  display: inline;
}

/* --- Hamburger Button --- */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 30px;
  height: 30px;
  gap: 5px;
  cursor: pointer;
  padding: 0;
  background: none;
  border: none;
  z-index: calc(var(--z-mobile-nav) + 1);
}

.hamburger__line {
  display: block;
  width: 22px;
  height: 1.5px;
  background: var(--color-text);
  transition: all var(--transition-base);
  transform-origin: center;
}

.hamburger.active .hamburger__line:nth-child(1) {
  transform: rotate(45deg) translate(4.5px, 4.5px);
}

.hamburger.active .hamburger__line:nth-child(2) {
  opacity: 0;
}

.hamburger.active .hamburger__line:nth-child(3) {
  transform: rotate(-45deg) translate(4.5px, -4.5px);
}

/* --- Site Branding --- */
.site-branding {
  padding: var(--spacing-sm) 0;
  border-bottom: 1px solid var(--color-border);
}

.site-branding__inner {
  display: flex;
  align-items: center;
  justify-content: center;
}

.site-branding__text {
  font-family: var(--font-heading);
  font-size: 2rem;
  font-weight: var(--font-weight-bold);
  letter-spacing: var(--letter-spacing-widest);
  text-transform: uppercase;
  color: var(--color-text);
  text-decoration: none;
  transition: opacity var(--transition-fast);
}

.site-branding__text:hover {
  opacity: 0.7;
  color: var(--color-text);
}

.site-branding__logo img {
  max-height: 40px;
  width: auto;
}

.site-header.scrolled .site-branding {
  padding: var(--spacing-xs) 0;
}

.site-header.scrolled .site-branding__text {
  font-size: 1.5rem;
}

/* --- Main Navigation --- */
.main-nav {
  border-bottom: 1px solid var(--color-border);
}

.main-nav__inner {
  display: flex;
  justify-content: center;
}

.mega-menu {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  list-style: none;
  margin: 0;
  padding: 0;
}

.mega-menu__item {
  position: relative;
}

.mega-menu__item > a,
.mega-menu__trigger {
  display: block;
  padding: 16px 14px;
  font-family: var(--font-primary);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  letter-spacing: var(--letter-spacing-wider);
  text-transform: uppercase;
  color: var(--color-text);
  text-decoration: none;
  background: none;
  border: none;
  cursor: pointer;
  white-space: nowrap;
  position: relative;
  transition: color var(--transition-fast);
}

.mega-menu__item > a::after,
.mega-menu__trigger::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 1.5px;
  background: var(--color-primary);
  transition: width var(--transition-base);
}

.mega-menu__item > a:hover::after,
.mega-menu__trigger:hover::after,
.mega-menu__item.active > a::after,
.mega-menu__item.active .mega-menu__trigger::after {
  width: 70%;
}

/* --- Mega Menu Dropdown --- */
.mega-menu__dropdown {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  width: 100vw;
  max-width: 100vw;
  left: 50%;
  margin-left: -50vw;
  background: var(--color-secondary);
  border-top: 1px solid var(--color-border);
  box-shadow: var(--shadow-lg);
  padding: var(--spacing-xl) 0;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: all var(--transition-mega);
  z-index: var(--z-mega-menu);
}

.mega-menu__item.active .mega-menu__dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.mega-menu__container {
  display: flex;
  justify-content: center;
}

.mega-menu__columns {
  display: flex;
  gap: var(--spacing-xl);
  list-style: none;
  padding: 0;
  margin: 0;
}

.mega-menu__column {
  min-width: 180px;
}

.mega-menu__column-title {
  display: block;
  font-family: var(--font-primary);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  letter-spacing: var(--letter-spacing-wider);
  text-transform: uppercase;
  margin-bottom: var(--spacing-md);
  color: var(--color-text);
  text-decoration: none;
}

.mega-menu__sub-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.mega-menu__sub-list li {
  margin-bottom: var(--spacing-xs);
}

.mega-menu__sub-list a {
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
  text-decoration: none;
  transition: color var(--transition-fast);
  position: relative;
  display: inline-block;
}

.mega-menu__sub-list a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--color-text);
  transition: width var(--transition-base);
}

.mega-menu__sub-list a:hover {
  color: var(--color-text);
}

.mega-menu__sub-list a:hover::after {
  width: 100%;
}

/* --- Search Overlay --- */
.search-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--color-secondary);
  z-index: var(--z-modal);
  display: flex;
  align-items: center;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
}

.search-overlay.active {
  opacity: 1;
  visibility: visible;
}

.search-overlay__inner {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  width: 100%;
}

.search-form {
  display: flex;
  align-items: center;
  flex: 1;
  border-bottom: 1px solid var(--color-primary);
}

.search-form__input {
  flex: 1;
  padding: var(--spacing-sm) 0;
  font-size: var(--font-size-md);
  letter-spacing: var(--letter-spacing-wide);
  background: transparent;
}

.search-form__input::placeholder {
  color: var(--color-gray-mid);
  text-transform: uppercase;
  letter-spacing: var(--letter-spacing-wider);
  font-size: var(--font-size-sm);
}

.search-form__submit {
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--spacing-xs);
  color: var(--color-text);
}

.search-overlay__close {
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--spacing-xs);
  color: var(--color-text);
  margin-left: var(--spacing-sm);
}

/* --- Mobile Navigation Drawer --- */
.mobile-nav {
  position: fixed;
  top: 0;
  left: 0;
  width: 320px;
  max-width: 85vw;
  height: 100vh;
  background: var(--color-secondary);
  z-index: var(--z-mobile-nav);
  transform: translateX(-100%);
  transition: transform var(--transition-mega);
  overflow-y: auto;
  display: flex;
  flex-direction: column;
}

.mobile-nav.open {
  transform: translateX(0);
}

.mobile-nav__header {
  display: flex;
  justify-content: flex-end;
  padding: var(--spacing-sm) var(--spacing-md);
  border-bottom: 1px solid var(--color-border);
}

.mobile-nav__close {
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  color: var(--color-text);
}

.mobile-nav__content {
  flex: 1;
  padding: var(--spacing-md) 0;
}

.mobile-nav__list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.mobile-nav__list > li {
  border-bottom: 1px solid var(--color-gray-light);
}

.mobile-nav__list > li > a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-sm) var(--spacing-md);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  letter-spacing: var(--letter-spacing-wider);
  text-transform: uppercase;
  color: var(--color-text);
  text-decoration: none;
}

.mobile-nav__list > li.menu-item-has-children > a::after {
  content: '›';
  font-size: 1.2rem;
  color: var(--color-gray-dark);
}

.mobile-nav__list .sub-menu {
  display: none;
  list-style: none;
  padding: 0 0 var(--spacing-sm) var(--spacing-md);
  margin: 0;
}

.mobile-nav__list .sub-menu.open {
  display: block;
}

.mobile-nav__list .sub-menu a {
  display: block;
  padding: var(--spacing-xs) var(--spacing-md);
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
  text-decoration: none;
}

.mobile-nav__footer {
  padding: var(--spacing-md);
  border-top: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.mobile-nav__link {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  font-size: var(--font-size-sm);
  letter-spacing: var(--letter-spacing-wide);
  text-transform: uppercase;
  color: var(--color-text);
  text-decoration: none;
}