/* ========================================
   CSS Variables - Theme System
   ======================================== */
:root {
  /* Light Theme */
  --bg-primary: #f0f4f8;
  --bg-secondary: #ffffff;
  --bg-glass: rgba(255, 255, 255, 0.72);
  --bg-glass-hover: rgba(255, 255, 255, 0.88);
  --bg-glass-button: rgba(255, 255, 255, 0.5);
  --bg-glass-button-hover: rgba(255, 255, 255, 0.75);
  
  --text-primary: #1a202c;
  --text-secondary: #4a5568;
  --text-muted: #718096;
  
  --border-color: rgba(165, 164, 164, 0.4);
  --border-color-strong: rgba(0, 0, 0, 0.08);
  
  --accent-primary: #6366f1;
  --accent-primary-hover: #4f46e5;
  --accent-gradient: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #a855f7 100%);
  --accent-glow: rgba(99, 102, 241, 0.4);
  
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.12);
  --shadow-glow: 0 0 30px rgba(99, 102, 241, 0.15);
  
  --blur-amount: 10px;
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-smooth: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --border-radius: 16px;
  --border-radius-sm: 12px;
  --border-radius-xs: 8px;
}

[data-theme="dark"] {
  --bg-primary: #0f1419;
  --bg-secondary: #1a1f2e;
  --bg-glass: rgba(0, 0, 0, 0.85);
  --bg-glass-hover: rgba(26, 31, 46, 0.9);
  --bg-glass-button: rgba(255, 255, 255, 0.08);
  --bg-glass-button-hover: rgba(255, 255, 255, 0.15);
  
  --text-primary: #f7fafc;
  --text-secondary: #a0aec0;
  --text-muted: #718096;
  
  --border-color: rgba(255, 255, 255, 0.1);
  --border-color-strong: rgba(255, 255, 255, 0.15);
  
  --accent-primary: #818cf8;
  --accent-primary-hover: #a5b4fc;
  --accent-gradient: linear-gradient(135deg, #818cf8 0%, #a78bfa 50%, #c084fc 100%);
  --accent-glow: rgba(129, 140, 248, 0.5);
  
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 40px rgba(129, 140, 248, 0.2);
}

/* ========================================
   Navbar Container
   ======================================== */
.navbar-glass {
  position: sticky;
  top: 0;
  z-index: 1000;
}

.navbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 6px 12px;
  background: var(--bg-glass);
  backdrop-filter: blur(var(--blur-amount));
  -webkit-backdrop-filter: blur(var(--blur-amount));
  border: 1px solid var(--border-color);
  transition: all var(--transition-smooth);
}

.navbar-inner:hover {
  box-shadow: var(--shadow-lg), var(--shadow-glow);
}

/* ========================================
   Breadcrumb Section
   ======================================== */
.breadcrumb-section {
  display: flex;
  align-items: center;
}

.breadcrumb-glass {
  display: flex;
  align-items: center;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.breadcrumb-item {
  display: flex;
  align-items: center;
  font-size: 14px;
  font-weight: 500;
}

.breadcrumb-item a {
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--text-muted);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.breadcrumb-item a:hover {
  color: var(--accent-primary);
}

.breadcrumb-item .material-symbols-rounded {
  font-size: 18px;
}

.breadcrumb-separator {
  color: var(--text-muted);
  font-size: 12px;
}

.breadcrumb-item.active {
  color: var(--text-primary);
  font-weight: 600;
}

/* ========================================
   Search Section
   ======================================== */
.search-container {
  position: relative;
  flex: 0 1 320px;
}

.search-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}

.search-icon {
  position: absolute;
  left: 16px;
  color: var(--text-muted);
  font-size: 20px;
  pointer-events: none;
  transition: color var(--transition-fast);
}

.search-input {
  width: 100%;
  padding: 12px 16px 12px 48px;
  background: var(--bg-glass-button);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-sm);
  font-family: inherit;
  font-size: 14px;
  color: var(--text-primary);
  outline: none;
  transition: all var(--transition-fast);
}

.search-input::placeholder {
  color: var(--text-muted);
}

.search-input:focus {
  background: var(--bg-glass-button-hover);
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.search-input:focus ~ .search-icon {
  color: var(--accent-primary);
}

/* Search Suggestions Dropdown */
.suggestions-dropdown {
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  right: 0;
  background: var(--bg-glass);
  backdrop-filter: blur(var(--blur-amount));
  -webkit-backdrop-filter: blur(var(--blur-amount));
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-sm);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: all var(--transition-fast);
  list-style: none;
  margin: 0;
  padding: 0;
}

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

.suggestion-item {
  padding: 12px 16px;
  font-size: 14px;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  gap: 12px;
}

.suggestion-item:hover {
  background: var(--bg-glass-button-hover);
  color: var(--text-primary);
}

.suggestion-item .material-symbols-rounded {
  font-size: 18px;
  color: var(--text-muted);
}

/* ========================================
   Actions Section
   ======================================== */
.navbar-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

/* ========================================
   Glass Button Base
   ======================================== */
.glass-btn {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 16px;
  background: var(--bg-glass-button);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-xs);
  font-family: inherit;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  cursor: pointer;
  text-decoration: none;
  transition: all var(--transition-fast);
  overflow: hidden;
}

.glass-btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  transition: left 0.5s ease;
}

.glass-btn:hover {
  background: var(--bg-glass-button-hover);
  color: var(--text-primary);
  border-color: var(--border-color-strong);
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

.glass-btn:hover::before {
  left: 100%;
}

.glass-btn:active {
  transform: translateY(0);
}

/* Icon-only button */
.glass-btn-icon {
  padding: 10px;
  min-width: 42px;
  height: 42px;
}

.glass-btn .material-symbols-rounded {
  font-size: 20px;
}

/* Primary Glass Button */
.glass-btn-primary {
  background: var(--accent-gradient);
  border-color: transparent;
  color: white;
  font-weight: 600;
}

.glass-btn-primary:hover {
  color: rgb(0, 0, 0);
  box-shadow: var(--shadow-md), 0 0 20px var(--accent-glow);
  transform: translateY(-2px);
}

/* ========================================
   Theme Toggle
   ======================================== */
.theme-toggle {
  position: relative;
  width: 42px;
  height: 42px;
}

.theme-toggle .icon-sun,
.theme-toggle .icon-moon {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  transition: all var(--transition-smooth);
}

[data-theme="light"] .theme-toggle .icon-sun {
  opacity: 1;
  transform: translate(-50%, -50%) rotate(0deg);
}

[data-theme="light"] .theme-toggle .icon-moon {
  opacity: 0;
  transform: translate(-50%, -50%) rotate(-90deg);
}

[data-theme="dark"] .theme-toggle .icon-sun {
  opacity: 0;
  transform: translate(-50%, -50%) rotate(90deg);
}

[data-theme="dark"] .theme-toggle .icon-moon {
  opacity: 1;
  transform: translate(-50%, -50%) rotate(0deg);
}

/* ========================================
   Notification Badge
   ======================================== */
.btn-with-badge {
  position: relative;
}

.notification-badge {
  position: absolute;
  top: 4px;
  right: 4px;
  width: 10px;
  height: 10px;
  background: #ef4444;
  border: 2px solid var(--bg-glass);
  border-radius: 50%;
  animation: pulse-badge 2s infinite;
}

@keyframes pulse-badge {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.2); opacity: 0.8; }
}

/* ========================================
   Dropdown Menus
   ======================================== */
.dropdown {
  position: relative;
}

.dropdown-menu-glass {
  position: absolute;
  top: calc(100% + 12px);
  right: 0;
  min-width: 280px;
  background: var(--bg-glass);
  backdrop-filter: blur(var(--blur-amount));
  -webkit-backdrop-filter: blur(var(--blur-amount));
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-sm);
  box-shadow: var(--shadow-lg);
  padding: 8px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px) scale(0.96);
  transition: all var(--transition-fast);
  list-style: none;
  z-index: 1001;
  margin: 0;
}

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

.dropdown-header {
  padding: 12px 16px 8px;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.dropdown-item-glass {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  font-size: 14px;
  color: var(--text-secondary);
  border-radius: var(--border-radius-xs);
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
  border: none;
  background: none;
  width: 100%;
}

.dropdown-item-glass:hover {
  background: var(--bg-glass-button-hover);
  color: var(--text-primary);
}

.dropdown-item-glass .material-symbols-rounded {
  font-size: 20px;
  color: var(--text-muted);
}

.dropdown-item-glass:hover .material-symbols-rounded {
  color: var(--accent-primary);
}

.dropdown-divider {
  height: 1px;
  background: var(--border-color);
  margin: 8px 0;
}

/* ========================================
   Notification Items
   ======================================== */
.notification-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 12px 16px;
  border-radius: var(--border-radius-xs);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.notification-item:hover {
  background: var(--bg-glass-button-hover);
}

.notification-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  object-fit: cover;
  flex-shrink: 0;
}

.notification-avatar-icon {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-gradient);
  flex-shrink: 0;
}

.notification-avatar-icon .material-symbols-rounded {
  font-size: 20px;
  color: white;
}

.notification-content {
  flex: 1;
  min-width: 0;
}

.notification-title {
  font-size: 14px;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.notification-title strong {
  font-weight: 600;
}

.notification-time {
  font-size: 12px;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 4px;
}

.notification-time .material-symbols-rounded {
  font-size: 14px;
}

/* ========================================
   User Profile Section
   ======================================== */
.user-profile {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px 6px 6px;
}

.user-avatar {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--border-color);
  transition: border-color var(--transition-fast);
}

.user-profile:hover .user-avatar {
  border-color: var(--accent-primary);
}

.user-profile .expand-icon {
  font-size: 20px;
  color: var(--text-muted);
  transition: transform var(--transition-fast);
}

.user-profile.active .expand-icon {
  transform: rotate(180deg);
}

/* User dropdown specific */
.user-dropdown-header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 8px;
}

.user-dropdown-avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  object-fit: cover;
}

.user-dropdown-info h4 {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 2px;
}

.user-dropdown-info p {
  font-size: 12px;
  color: var(--text-muted);
  margin: 0;
}

.logout-btn {
  color: #ef4444 !important;
}

.logout-btn:hover {
  background: rgba(239, 68, 68, 0.1) !important;
}

/* ========================================
   Mobile Menu Toggle
   ======================================== */
.mobile-toggle {
  display: none;
}

/* Below 1200px the sidebar becomes a slide-in overlay, so the navbar needs a
   visible button to open it (the sidebar's own hamburger is off-screen then). */
@media (max-width: 1199px) {
  .mobile-toggle { display: flex; }
}

.hamburger {
  display: flex;
  flex-direction: column;
  gap: 5px;
  width: 20px;
}

.hamburger span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--text-secondary);
  border-radius: 2px;
  transition: all var(--transition-fast);
}

.mobile-toggle:hover .hamburger span {
  background: var(--text-primary);
}

/* ========================================
   Responsive Styles
   ======================================== */
@media (max-width: 1024px) {
  .search-container {
    flex: 0 1 240px;
  }
}

@media (max-width: 768px) {
  .navbar-glass {
    padding: 8px 12px;
  }

  .navbar-inner {
    padding: 10px 16px;
  }

  .search-container {
    display: none;
  }

  .mobile-toggle {
    display: flex;
  }

  .glass-btn:not(.glass-btn-icon):not(.user-profile) {
    display: none;
  }

  .navbar-actions {
    gap: 4px;
  }
}