/* Header Layout */

/* Main header */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-sticky);
  background: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-base);
}

.header.header-hidden {
  transform: translateY(-100%);
}

/* Transparent header on homepage hero */
.home-page .header {
  background: transparent;
  backdrop-filter: none;
  box-shadow: none;
}

.home-page .header.header-scrolled {
  background: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-md);
}

.header-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 80px;
}

/* Logo */
.header-logo {
  display: flex;
  align-items: center;
  text-decoration: none;
  transition: transform var(--transition-base);
}

.header-logo:hover {
  transform: scale(1.05);
}

.header-logo img {
  height: 48px;
  width: auto;
}

/* Default: show dark logo on solid white header */
.logo-light {
  display: none;
}

.logo-dark {
  display: block;
}

/* Homepage: show light logo on transparent header */
.home-page .logo-light {
  display: block;
}

.home-page .logo-dark {
  display: none;
}

/* Homepage scrolled: switch to dark logo */
.home-page .header-scrolled .logo-light {
  display: none;
}

.home-page .header-scrolled .logo-dark {
  display: block;
}

/* Navigation */
.header-nav {
  display: none;
}

@media (min-width: 1024px) {
  .header-nav {
    display: flex;
    align-items: center;
    gap: var(--space-8);
  }
}

.nav-link {
  font-weight: var(--font-medium);
  color: var(--secondary);
  text-decoration: none;
  position: relative;
  transition: color var(--transition-base);
}

/* White nav on homepage transparent header */
.home-page .nav-link {
  color: white;
}

.home-page .header-scrolled .nav-link {
  color: var(--secondary);
}

.nav-link:hover {
  color: var(--primary);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary);
  transition: width var(--transition-base);
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

/* Language switcher dropdown */
.lang-switcher-dropdown {
  display: none;
  position: relative;
}

@media (min-width: 1024px) {
  .lang-switcher-dropdown {
    display: block;
  }
}

.lang-current {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  background: var(--gray-100);
  border: none;
  border-radius: var(--radius-full);
  color: var(--secondary);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  cursor: pointer;
  transition: all var(--transition-base);
}

.lang-current:hover {
  background: var(--gray-200);
}

/* Homepage: light lang switcher on transparent header */
.home-page .lang-current {
  background: rgba(255, 255, 255, 0.1);
  color: white;
}

.home-page .lang-current:hover {
  background: rgba(255, 255, 255, 0.2);
}

.home-page .header-scrolled .lang-current {
  background: var(--gray-100);
  color: var(--secondary);
}

.home-page .header-scrolled .lang-current:hover {
  background: var(--gray-200);
}

.lang-flag {
  font-size: 1.1em;
}

.lang-code {
  font-weight: var(--font-semibold);
}

.lang-arrow {
  font-size: 0.7em;
  transition: transform var(--transition-base);
}

.lang-switcher-dropdown:hover .lang-arrow {
  transform: rotate(180deg);
}

.lang-dropdown-menu {
  visibility: hidden;
  opacity: 0;
  position: absolute;
  right: 0;
  top: calc(100% + 8px);
  background: white;
  border-radius: 8px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
  min-width: 160px;
  padding: 6px 0;
  z-index: var(--z-popover);
  transition: opacity 0.2s ease, visibility 0s 0.2s;
}

.lang-switcher-dropdown:hover .lang-dropdown-menu {
  visibility: visible;
  opacity: 1;
  transition: opacity 0.2s ease, visibility 0s;
}

.lang-dropdown-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  color: var(--secondary);
  text-decoration: none;
  font-size: var(--text-sm);
  transition: all var(--transition-base);
}

.lang-dropdown-item:hover {
  background: var(--gray-50);
  color: var(--primary);
}

.lang-dropdown-item .lang-name {
  font-weight: var(--font-medium);
}

/* Header CTA */
.header-cta {
  display: none;
}

@media (min-width: 1024px) {
  .header-cta {
    display: block;
  }
}

/* Mobile menu button */
.mobile-menu-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  background: none;
  border: none;
  color: var(--secondary);
  font-size: 24px;
  cursor: pointer;
  transition: all var(--transition-base);
}

/* Homepage: white mobile btn on transparent header */
.home-page .mobile-menu-btn {
  color: white;
}

.home-page .header-scrolled .mobile-menu-btn {
  color: var(--secondary);
}

@media (min-width: 1024px) {
  .mobile-menu-btn {
    display: none;
  }
}

/* Mobile menu */
.mobile-menu {
  position: fixed;
  top: 80px;
  left: 0;
  right: 0;
  background: var(--gray-900);
  transform: translateY(-100%);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
  max-height: calc(100vh - 80px);
  overflow-y: auto;
}

.mobile-menu.active {
  transform: translateY(0);
  opacity: 1;
  visibility: visible;
}

.mobile-menu-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--space-6);
}

.mobile-nav {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.mobile-nav-link {
  display: block;
  padding: var(--space-3) 0;
  font-weight: var(--font-medium);
  color: white;
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  transition: all var(--transition-base);
}

.mobile-nav-link:hover {
  color: var(--primary);
  padding-left: var(--space-4);
}

.mobile-menu-footer {
  margin-top: var(--space-6);
  padding-top: var(--space-6);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

/* Mobile Language Switcher */
.mobile-lang-switcher {
  display: flex;
  justify-content: center;
  gap: var(--space-4);
  margin-top: var(--space-6);
  margin-bottom: var(--space-4);
  padding: var(--space-4) 0;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.mobile-lang-link {
  padding: var(--space-2) var(--space-4);
  font-size: 1rem;
  font-weight: var(--font-medium);
  color: rgba(255, 255, 255, 0.7);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-base);
  transition: all var(--transition-base);
  text-decoration: none;
}

.mobile-lang-link:hover,
.mobile-lang-link.active {
  background: var(--primary);
  color: white;
  border-color: var(--primary);
}

/* Sticky header styles for different pages */
.header-transparent {
  background: transparent;
}

.header-dark {
  background: var(--secondary);
}

.header-dark .nav-link {
  color: white;
}

.header-white {
  background: white;
  box-shadow: var(--shadow-sm);
}

.header-white .nav-link {
  color: var(--secondary);
}

.header-white .mobile-menu-btn {
  color: var(--secondary);
}

/* Dropdown menu */
.nav-dropdown {
  position: relative;
}

.nav-dropdown-menu {
  visibility: hidden;
  opacity: 0;
  position: absolute;
  background-color: white;
  min-width: 200px;
  box-shadow: 0px 8px 16px 0px rgba(0,0,0,0.15);
  z-index: var(--z-popover);
  border-radius: 8px;
  padding: 8px 0;
  top: calc(100% + 10px);
  transition: opacity 0.3s ease, visibility 0s 0.3s;
}

.nav-dropdown:hover .nav-dropdown-menu,
.nav-dropdown-menu:hover {
  visibility: visible;
  opacity: 1;
  transition: opacity 0.3s ease, visibility 0s;
}

.nav-dropdown-item {
  color: var(--secondary);
  padding: 10px 20px;
  text-decoration: none;
  display: block;
  transition: all 0.3s ease;
  font-size: 0.95rem;
  font-weight: 400;
}

.nav-dropdown-item:hover {
  background-color: var(--gray-50);
  color: var(--primary);
  padding-left: 24px;
}

/* Header scrolled state for dropdowns */
.header-scrolled .nav-dropdown-menu {
  box-shadow: 0px 8px 20px 0px rgba(0,0,0,0.12);
}

/* Keyboard-accessible dropdowns */
.nav-dropdown.is-open .nav-dropdown-menu {
  visibility: visible;
  opacity: 1;
  transition: opacity 0.3s ease, visibility 0s;
}

.lang-switcher-dropdown.is-open .lang-dropdown-menu {
  visibility: visible;
  opacity: 1;
  transition: opacity 0.2s ease, visibility 0s;
}

.lang-switcher-dropdown.is-open .lang-arrow {
  transform: rotate(180deg);
}

/* Mobile nav dropdown - hide on mobile */
@media (max-width: 768px) {
  .nav-dropdown .nav-link::after {
    display: none;
  }

  .nav-dropdown-menu {
    display: none !important;
  }
}