/* Header / Navigation styles */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 100;
  background-color: var(--background);
  border-bottom: 1px solid var(--surface-border);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.02);
  transition: background-color var(--transition-normal), border-color var(--transition-normal);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px; /* Thinner height for a cleaner look */
}

@media (min-width: 993px) {
  .nav-container nav {
    margin-left: auto;
    margin-right: var(--spacing-8);
  }
}

/* Logo: Barlow Bold Italic & Brand Red */
.logo {
  font-family: var(--font-primary);
  font-size: var(--text-2xl);
  font-weight: var(--weight-bold);
  font-style: italic;
  letter-spacing: -1px;
  color: var(--primary);
  transition: color var(--transition-fast);
}

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

/* Nav Menu and Items */
.nav-menu {
  display: flex;
  align-items: center;
  gap: var(--spacing-6);
  list-style: none;
}

.nav-item {
  position: relative; /* Essential for absolute positioning of dropdowns */
}

/* Menu Links: Barlow Light Italic */
.nav-link {
  font-family: var(--font-primary);
  font-size: var(--text-sm);
  font-weight: var(--weight-light);
  font-style: italic;
  color: var(--text-main);
  padding: var(--spacing-3) 0;
  display: flex;
  align-items: center;
  gap: 4px;
  cursor: pointer;
  transition: color var(--transition-fast);
}

.nav-link:hover,
.nav-link.active {
  color: var(--primary); /* Active/Selected items in red */
}

/* Dropdown Indicators (small arrows) */
.nav-link svg {
  transition: transform var(--transition-fast);
}

.nav-item:hover .nav-link svg {
  transform: rotate(180deg);
  color: var(--primary);
}

/* Dropdown Menu styling */
.dropdown-menu {
  list-style: none;
  padding: 0;
  margin: 0;
}

/* Desktop-only dropdown behavior */
@media (min-width: 993px) {
  .dropdown-menu {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(10px);
    width: 240px;
    background-color: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    box-shadow: var(--glass-shadow);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    padding: var(--spacing-2) 0;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity var(--transition-fast), transform var(--transition-fast), visibility var(--transition-fast);
    z-index: 200;
  }

  .nav-item:hover .dropdown-menu,
  .nav-item:focus-within .dropdown-menu {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: translateX(-50%) translateY(0);
  }
}

.dropdown-item a {
  display: block;
  padding: var(--spacing-2) var(--spacing-4);
  font-family: var(--font-primary);
  font-size: calc(var(--text-sm) - 0.05rem);
  font-weight: var(--weight-light);
  font-style: italic;
  color: var(--text-muted);
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.dropdown-item a:hover {
  background-color: var(--primary-glow);
  color: var(--primary);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-4);
}

/* Language Selector Styles */
.lang-selector-container {
  position: relative;
  display: inline-block;
}

.lang-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-family: var(--font-primary);
  font-size: var(--text-xs);
  font-weight: var(--weight-bold);
  font-style: italic;
  cursor: pointer;
  padding: var(--spacing-2) var(--spacing-3);
  border-radius: var(--radius-md);
  transition: color var(--transition-fast), background-color var(--transition-fast);
}

.lang-btn:hover {
  color: var(--primary);
  background-color: var(--primary-glow);
}

.lang-dropdown {
  position: absolute;
  top: calc(100% + 12px);
  right: 0;
  width: 380px;
  max-width: calc(100vw - var(--spacing-8));
  max-height: 320px;
  overflow-y: auto;
  background-color: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  box-shadow: var(--glass-shadow);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-2);
  padding: var(--spacing-4);
  z-index: 300;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: opacity var(--transition-fast), transform var(--transition-fast), visibility var(--transition-fast);
}

/* Custom scrollbar for language list */
.lang-dropdown::-webkit-scrollbar {
  width: 5px;
}
.lang-dropdown::-webkit-scrollbar-track {
  background: transparent;
}
.lang-dropdown::-webkit-scrollbar-thumb {
  background: var(--surface-border);
  border-radius: var(--radius-full);
}
.lang-dropdown::-webkit-scrollbar-thumb:hover {
  background: var(--text-muted);
}

.lang-dropdown.show {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.lang-option {
  padding: 10px 8px;
  font-family: var(--font-primary);
  font-size: calc(var(--text-sm) - 0.1rem);
  font-weight: var(--weight-light);
  font-style: italic;
  color: var(--text-muted);
  text-decoration: none;
  border-radius: var(--radius-sm);
  transition: background-color var(--transition-fast), color var(--transition-fast);
  text-align: center;
  white-space: nowrap;
}

.lang-option:hover {
  background-color: var(--primary-glow);
  color: var(--primary);
}

.lang-option.active {
  color: var(--primary);
  font-weight: var(--weight-bold);
  background-color: var(--primary-glow);
}

@media (max-width: 480px) {
  .lang-dropdown {
    grid-template-columns: repeat(2, 1fr);
    width: 250px;
    padding: var(--spacing-3);
    gap: var(--spacing-1);
  }
  .lang-option {
    padding: 8px 4px;
    font-size: calc(var(--text-sm) - 0.12rem);
  }
}

/* Mobile Toggle Hamburger */
.mobile-toggle {
  display: none;
  width: 40px;
  height: 40px;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 6px;
  border-radius: var(--radius-sm);
  background-color: transparent;
  cursor: pointer;
}

.mobile-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background-color: var(--text-main);
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

/* Responsive styles */
@media (max-width: 992px) {
  .mobile-toggle {
    display: flex;
  }

  .nav-menu {
    position: fixed;
    top: 64px;
    right: -320px;
    left: auto;
    width: 320px;
    height: calc(100vh - 64px);
    background-color: var(--background);
    flex-direction: column;
    align-items: flex-start;
    padding: var(--spacing-6) var(--spacing-8);
    gap: var(--spacing-4);
    transition: right var(--transition-normal);
    border-left: 1px solid var(--surface-border);
    border-top: none;
    box-shadow: -5px 0 25px rgba(0, 0, 0, 0.05);
    overflow-y: auto;
  }

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

  .nav-item {
    width: 100%;
  }

  .nav-link {
    font-size: var(--text-lg);
    width: 100%;
    justify-content: space-between;
    padding: var(--spacing-3) 0;
    border-bottom: 1px solid var(--surface-border);
  }

  /* Accordion submenus on mobile */
  .dropdown-menu {
    position: relative;
    display: none; /* Controlled via JS */
    width: 100%;
    border-left: 2px solid var(--primary);
    padding: 0 0 0 var(--spacing-4);
    margin-top: var(--spacing-2);
  }

  .dropdown-menu.open {
    display: block;
  }

  .dropdown-item a {
    display: block;
    padding: var(--spacing-2) 0;
    font-size: var(--text-sm);
    font-family: var(--font-primary);
    font-weight: var(--weight-light);
    font-style: italic;
    color: var(--text-muted);
  }

  .nav-item.open .nav-link svg {
    transform: rotate(180deg);
    color: var(--primary);
  }

  /* Hamburger animasyonu */
  .mobile-toggle.open span:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
  }
  .mobile-toggle.open span:nth-child(2) {
    opacity: 0;
  }
  .mobile-toggle.open span:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
  }
}

/* ==========================================================================
   Megamenu Layout and Styling
   ========================================================================== */

/* Megamenu Desktop Styles */
@media (min-width: 993px) {
  .megamenu {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(10px);
    width: 680px;
    background-color: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    box-shadow: var(--glass-shadow);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity var(--transition-fast), transform var(--transition-fast), visibility var(--transition-fast);
    z-index: 200;
  }

  .nav-item:hover .megamenu {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: translateX(-50%) translateY(0);
  }

  .megamenu-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-6);
    padding: var(--spacing-6);
  }

  .megamenu-col {
    display: flex;
    flex-direction: column;
  }

  .megamenu-title {
    font-family: var(--font-primary);
    font-size: var(--text-xs);
    font-weight: var(--weight-bold);
    font-style: italic;
    color: var(--primary);
    margin-bottom: var(--spacing-3);
    border-bottom: 1px solid var(--surface-border);
    padding-bottom: var(--spacing-1);
    text-transform: uppercase;
    letter-spacing: 0.5px;
  }

  .megamenu-title a {
    color: var(--primary);
    transition: color var(--transition-fast);
  }

  .megamenu-title a:hover {
    color: var(--primary-hover);
  }

  .megamenu-links {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-2);
  }

  .megamenu-links a {
    display: block;
    font-family: var(--font-primary);
    font-size: calc(var(--text-sm) - 0.05rem);
    font-weight: var(--weight-light);
    font-style: italic;
    color: var(--text-muted);
    transition: color var(--transition-fast), padding var(--transition-fast);
  }

  .megamenu-links a:hover {
    color: var(--primary);
    padding-left: 2px;
  }
}

/* Megamenu Mobile Styles */
@media (max-width: 992px) {
  .megamenu {
    position: relative;
    display: none;
    width: 100%;
    border-left: 2px solid var(--primary);
    padding: 0 0 0 var(--spacing-4);
    margin-top: var(--spacing-2);
    box-shadow: none;
    border-radius: 0;
    background: transparent;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
  }

  .megamenu.open {
    display: block;
  }

  .megamenu-grid {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-4);
    padding: var(--spacing-2) 0;
  }

  .megamenu-col {
    display: flex;
    flex-direction: column;
  }

  .megamenu-title {
    font-family: var(--font-primary);
    font-size: var(--text-sm);
    font-weight: var(--weight-bold);
    font-style: italic;
    color: var(--text-main);
    margin-bottom: var(--spacing-2);
    text-transform: uppercase;
  }

  .megamenu-title a {
    color: var(--text-main);
  }

  .megamenu-links {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-2);
    padding-left: var(--spacing-2);
  }

  .megamenu-links a {
    display: block;
    font-family: var(--font-primary);
    font-size: var(--text-sm);
    font-weight: var(--weight-light);
    font-style: italic;
    color: var(--text-muted);
    padding: var(--spacing-1) 0;
  }
}