/* =========================================
   PROFESSIONAL MEGA MENU
   Modern navigation with dropdowns
========================================= */

/* Enhanced Header */
.bx-header {
  position: sticky;
  top: 0;
  z-index: 2000;
  backdrop-filter: blur(24px) saturate(180%);
  -webkit-backdrop-filter: blur(24px) saturate(180%);
  background: rgba(var(--bg-rgb), 0.85);
  border-bottom: 1px solid var(--border);
  transition: all 0.3s ease;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

.bx-header.scrolled {
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  background: rgba(var(--bg-rgb), 0.95);
}

/* Navigation Enhancement */
.bx-nav ul {
  display: flex;
  gap: 8px;
  list-style: none;
  align-items: center;
  position: relative;
}

.bx-nav > ul > li {
  position: relative;
}

.bx-nav a {
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--text);
  opacity: 0.9;
  padding: 12px 18px;
  border-radius: 10px;
  transition: all 0.3s ease;
  position: relative;
  display: flex;
  align-items: center;
  gap: 6px;
}

.bx-nav a:hover {
  opacity: 1;
  color: var(--primary);
  background: var(--surface);
  transform: translateY(-2px);
}

.bx-nav a.active {
  color: var(--primary);
  background: linear-gradient(135deg, rgba(14, 165, 233, 0.12), rgba(99, 102, 241, 0.08));
  box-shadow: inset 0 0 0 1px rgba(14, 165, 233, 0.2);
}

/* Dropdown indicator */
.bx-nav a.has-dropdown::after {
  content: '▾';
  font-size: 0.75em;
  margin-left: 4px;
  transition: transform 0.3s ease;
}

.bx-nav li:hover > a.has-dropdown::after {
  transform: rotate(180deg);
}

/* Dropdown Menu */
.bx-nav .dropdown {
  position: absolute;
  top: calc(100% + 12px);
  right: 0;
  min-width: 240px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  box-shadow: 0 12px 48px rgba(0, 0, 0, 0.15);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px) scale(0.95);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  padding: 8px;
  backdrop-filter: blur(24px);
}

.bx-nav li:hover > .dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0) scale(1);
}

.bx-nav .dropdown a {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  border-radius: 10px;
  color: var(--text);
  font-size: 0.9rem;
  transition: all 0.2s ease;
}

.bx-nav .dropdown a:hover {
  background: var(--bg);
  color: var(--primary);
  transform: translateX(-4px);
}

.bx-nav .dropdown a i {
  width: 20px;
  text-align: center;
  color: var(--primary);
  font-size: 1.1em;
}

/* Mega Menu (for large dropdowns) */
.bx-nav .mega-menu {
  min-width: 600px;
  padding: 24px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.mega-menu-section h4 {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 12px;
  padding: 0 16px;
}

.mega-menu-section ul {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.mega-menu-section a {
  padding: 10px 16px;
  font-size: 0.9rem;
}

/* Quick Action Buttons in Header */
.header-actions {
  display: flex;
  gap: 12px;
  align-items: center;
}

.header-actions .btn {
  padding: 10px 20px;
  font-size: 0.9rem;
  border-radius: 10px;
  font-weight: 600;
  transition: all 0.3s ease;
}

.header-actions .btn.primary {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: white;
  box-shadow: 0 4px 12px rgba(14, 165, 233, 0.3);
}

.header-actions .btn.primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(14, 165, 233, 0.4);
}

.header-actions .btn.ghost {
  border: 1.5px solid var(--border);
  color: var(--text);
  background: transparent;
}

.header-actions .btn.ghost:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: rgba(14, 165, 233, 0.05);
}

/* Theme Toggle Enhanced */
.theme-toggle {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  background: var(--surface);
  border: 1px solid var(--border);
  cursor: pointer;
  font-size: 1.2rem;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.theme-toggle::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(14, 165, 233, 0.1), rgba(99, 102, 241, 0.1));
  opacity: 0;
  transition: opacity 0.3s ease;
}

.theme-toggle:hover::before {
  opacity: 1;
}

.theme-toggle:hover {
  transform: scale(1.1) rotate(15deg);
  box-shadow: 0 4px 12px rgba(14, 165, 233, 0.2);
  border-color: var(--primary);
}

/* Responsive */
@media (max-width: 1024px) {
  .bx-nav ul {
    gap: 4px;
  }

  .bx-nav a {
    padding: 10px 14px;
    font-size: 0.9rem;
  }

  .bx-nav .mega-menu {
    min-width: 500px;
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .bx-nav .dropdown,
  .bx-nav .mega-menu {
    display: none;
  }
}