/* ================================================
   MEGA MENU NAVIGATION
   BINOX - Premium International Marketplace
   Multi-level dropdown navigation with mega menu
   ================================================ */

/* ===== MEGA MENU CONTAINER ===== */
.mega-menu {
  position: relative;
  background: var(--surface-0);
  border-bottom: 1px solid var(--ink-200);
  box-shadow: var(--shadow-sm);
  z-index: var(--z-sticky);
}

.mega-menu-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
  padding: var(--space-4) 0;
}

/* ===== MAIN NAVIGATION ===== */
.main-nav {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  flex: 1;
  overflow-x: auto;
  scrollbar-width: none;
}

.main-nav::-webkit-scrollbar {
  display: none;
}

/* ===== NAVIGATION ITEMS ===== */
.nav-item {
  position: relative;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-4);
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  color: var(--ink-700);
  border-radius: var(--radius-lg);
  transition: all var(--transition-base);
  white-space: nowrap;
  cursor: pointer;
  user-select: none;
}

.nav-link:hover {
  color: var(--brand-accent);
  background: var(--surface-100);
}

.nav-link.active {
  color: var(--brand-accent);
  background: var(--brand-accent-light);
}

.nav-link svg {
  width: 16px;
  height: 16px;
  transition: transform var(--transition-base);
}

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

/* ===== MEGA DROPDOWN ===== */
.mega-dropdown {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 600px;
  max-width: 900px;
  background: var(--surface-0);
  border: 1px solid var(--ink-200);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-2xl);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: all var(--transition-premium);
  z-index: var(--z-dropdown);
  padding: var(--space-6);
}

.nav-item:hover .mega-dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

/* ===== MEGA DROPDOWN GRID ===== */
.mega-dropdown-grid {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: var(--space-8);
}

/* ===== CATEGORY SIDEBAR ===== */
.category-sidebar {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  padding-right: var(--space-6);
  border-right: 1px solid var(--ink-200);
}

.category-sidebar-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--ink-600);
  border-radius: var(--radius-lg);
  transition: all var(--transition-base);
  cursor: pointer;
}

.category-sidebar-item:hover,
.category-sidebar-item.active {
  color: var(--brand-accent);
  background: var(--brand-accent-light);
}

.category-sidebar-item svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

/* ===== SUBCATEGORY CONTENT ===== */
.subcategory-content {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}

.subcategory-section {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.subcategory-title {
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  font-weight: var(--font-bold);
  color: var(--ink-900);
  padding-bottom: var(--space-2);
  border-bottom: 2px solid var(--brand-accent);
}

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

.subcategory-link {
  font-size: var(--text-sm);
  color: var(--ink-600);
  transition: color var(--transition-fast);
  padding: var(--space-1) 0;
}

.subcategory-link:hover {
  color: var(--brand-accent);
  padding-left: var(--space-2);
}

/* ===== FEATURED PRODUCTS IN MEGA MENU ===== */
.mega-featured {
  margin-top: var(--space-6);
  padding-top: var(--space-6);
  border-top: 1px solid var(--ink-200);
}

.mega-featured-title {
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  font-weight: var(--font-bold);
  color: var(--ink-900);
  margin-bottom: var(--space-4);
}

.mega-featured-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-4);
}

.mega-featured-item {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  padding: var(--space-3);
  background: var(--surface-50);
  border-radius: var(--radius-lg);
  transition: all var(--transition-base);
  cursor: pointer;
}

.mega-featured-item:hover {
  background: var(--surface-100);
  transform: translateY(-2px);
}

.mega-featured-image {
  aspect-ratio: 1;
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--surface-200);
}

.mega-featured-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-base);
}

.mega-featured-item:hover .mega-featured-image img {
  transform: scale(1.05);
}

.mega-featured-name {
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  color: var(--ink-700);
  line-height: var(--leading-tight);
}

.mega-featured-price {
  font-size: var(--text-sm);
  font-weight: var(--font-bold);
  color: var(--brand-accent);
}

/* ===== SIMPLE DROPDOWN ===== */
.simple-dropdown {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 200px;
  background: var(--surface-0);
  border: 1px solid var(--ink-200);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: all var(--transition-premium);
  z-index: var(--z-dropdown);
  padding: var(--space-2);
  overflow: hidden;
}

.nav-item:hover .simple-dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.simple-dropdown-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-sm);
  color: var(--ink-600);
  border-radius: var(--radius-md);
  transition: all var(--transition-base);
  cursor: pointer;
}

.simple-dropdown-item:hover {
  color: var(--brand-accent);
  background: var(--surface-100);
}

.simple-dropdown-item svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

/* ===== NESTED DROPDOWN ===== */
.nested-dropdown {
  position: relative;
}

.nested-dropdown-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}

.nested-dropdown-link svg {
  width: 14px;
  height: 14px;
  transition: transform var(--transition-base);
}

.nested-dropdown:hover .nested-dropdown-link svg {
  transform: rotate(-90deg);
}

.nested-submenu {
  position: absolute;
  top: 0;
  left: 100%;
  min-width: 200px;
  background: var(--surface-0);
  border: 1px solid var(--ink-200);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  opacity: 0;
  visibility: hidden;
  transform: translateX(10px);
  transition: all var(--transition-premium);
  z-index: var(--z-dropdown);
  padding: var(--space-2);
  margin-left: var(--space-2);
}

.nested-dropdown:hover .nested-submenu {
  opacity: 1;
  visibility: visible;
  transform: translateX(0);
}

/* ===== MOBILE NAVIGATION ===== */
.mobile-nav-toggle {
  display: none;
  background: transparent;
  border: none;
  padding: var(--space-3);
  cursor: pointer;
  color: var(--ink-700);
  border-radius: var(--radius-lg);
  transition: all var(--transition-base);
}

.mobile-nav-toggle:hover {
  background: var(--surface-100);
  color: var(--brand-accent);
}

.mobile-nav-toggle svg {
  width: 24px;
  height: 24px;
}

/* ===== MOBILE DRAWER ===== */
.mobile-drawer {
  position: fixed;
  inset: 0;
  z-index: var(--z-modal);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-premium);
}

.mobile-drawer.open {
  opacity: 1;
  visibility: visible;
}

.mobile-drawer-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(15, 23, 42, 0.5);
  backdrop-filter: blur(4px);
  transition: opacity var(--transition-premium);
}

.mobile-drawer-panel {
  position: absolute;
  top: 0;
  left: 0;
  bottom: 0;
  width: min(85vw, 400px);
  background: var(--surface-0);
  transform: translateX(-100%);
  transition: transform var(--transition-premium);
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-2xl);
}

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

.mobile-drawer-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) var(--space-6);
  border-bottom: 1px solid var(--ink-200);
  background: var(--surface-50);
}

.mobile-drawer-title {
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: var(--font-bold);
  color: var(--ink-900);
}

.mobile-drawer-close {
  background: transparent;
  border: none;
  padding: var(--space-2);
  cursor: pointer;
  color: var(--ink-600);
  border-radius: var(--radius-md);
  transition: all var(--transition-base);
}

.mobile-drawer-close:hover {
  background: var(--surface-200);
  color: var(--ink-900);
}

.mobile-drawer-close svg {
  width: 20px;
  height: 20px;
}

.mobile-drawer-content {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-4);
}

/* ===== MOBILE CATEGORY LIST ===== */
.mobile-category-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.mobile-category-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4);
  font-family: var(--font-heading);
  font-size: var(--text-base);
  font-weight: var(--font-semibold);
  color: var(--ink-700);
  border-radius: var(--radius-lg);
  transition: all var(--transition-base);
  cursor: pointer;
  border: 1px solid transparent;
}

.mobile-category-item:hover {
  background: var(--surface-100);
  color: var(--brand-accent);
}

.mobile-category-item svg {
  width: 20px;
  height: 20px;
  transition: transform var(--transition-base);
}

.mobile-category-item.expanded svg {
  transform: rotate(180deg);
}

/* ===== MOBILE SUBCATEGORY PANEL ===== */
.mobile-subcategory-panel {
  display: none;
  flex-direction: column;
  gap: var(--space-2);
  padding: var(--space-4);
  margin-top: var(--space-2);
  margin-left: var(--space-4);
  background: var(--surface-50);
  border-radius: var(--radius-lg);
  border-left: 3px solid var(--brand-accent);
}

.mobile-subcategory-panel.open {
  display: flex;
}

.mobile-subcategory-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3);
  font-size: var(--text-sm);
  color: var(--ink-600);
  border-radius: var(--radius-md);
  transition: all var(--transition-base);
  cursor: pointer;
}

.mobile-subcategory-item:hover {
  color: var(--brand-accent);
  background: var(--surface-100);
}

.mobile-subcategory-item svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

/* ===== MOBILE BOTTOM NAVIGATION ===== */
.mobile-bottom-nav {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--surface-0);
  border-top: 1px solid var(--ink-200);
  box-shadow: var(--shadow-lg);
  z-index: var(--z-fixed);
  padding: var(--space-2) 0 max(var(--space-2), env(safe-area-inset-bottom));
}

.mobile-bottom-nav-inner {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: var(--space-1);
}

.mobile-nav-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-2);
  font-size: var(--text-xs);
  font-weight: var(--font-medium);
  color: var(--ink-500);
  border-radius: var(--radius-lg);
  transition: all var(--transition-base);
  cursor: pointer;
  text-decoration: none;
}

.mobile-nav-item:hover {
  color: var(--brand-accent);
  background: var(--surface-100);
}

.mobile-nav-item.active {
  color: var(--brand-accent);
}

.mobile-nav-item svg {
  width: 24px;
  height: 24px;
}

.mobile-nav-item .badge {
  position: absolute;
  top: var(--space-1);
  right: var(--space-1);
  min-width: 18px;
  height: 18px;
  padding: 0 var(--space-1);
  font-size: 10px;
  font-weight: var(--font-bold);
  background: var(--brand-accent);
  color: white;
  border-radius: var(--radius-full);
  display: grid;
  place-items: center;
}

/* ===== RESPONSIVE DESIGN ===== */
@media (max-width: 1024px) {
  .main-nav {
    gap: 0;
  }
  
  .nav-link {
    padding: var(--space-2) var(--space-3);
    font-size: var(--text-xs);
  }
  
  .mega-dropdown {
    min-width: 500px;
    max-width: 700px;
  }
  
  .subcategory-content {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .mobile-nav-toggle {
    display: flex;
  }
  
  .main-nav {
    display: none;
  }
  
  .mobile-bottom-nav {
    display: block;
  }
  
  .mega-dropdown,
  .simple-dropdown {
    display: none;
  }
}

@media (max-width: 480px) {
  .mobile-drawer-panel {
    width: 85vw;
  }
  
  .mobile-bottom-nav-inner {
    gap: 0;
  }
  
  .mobile-nav-item {
    padding: var(--space-1);
    font-size: 10px;
  }
  
  .mobile-nav-item svg {
    width: 20px;
    height: 20px;
  }
}

/* ===== ACCESSIBILITY ===== */
@media (prefers-reduced-motion: reduce) {
  .mega-dropdown,
  .simple-dropdown,
  .mobile-drawer,
  .mobile-drawer-panel {
    transition: none;
  }
  
  .nav-link svg,
  .nested-dropdown-link svg,
  .mobile-category-item svg {
    transition: none;
  }
}

/* ===== FOCUS STATES ===== */
.nav-link:focus-visible,
.simple-dropdown-item:focus-visible,
.mobile-category-item:focus-visible,
.mobile-subcategory-item:focus-visible {
  outline: 2px solid var(--brand-accent);
  outline-offset: 2px;
}

/* ===== SCROLLBAR STYLING ===== */
.mobile-drawer-content::-webkit-scrollbar {
  width: 6px;
}

.mobile-drawer-content::-webkit-scrollbar-track {
  background: var(--surface-100);
}

.mobile-drawer-content::-webkit-scrollbar-thumb {
  background: var(--ink-300);
  border-radius: var(--radius-full);
}

.mobile-drawer-content::-webkit-scrollbar-thumb:hover {
  background: var(--ink-400);
}