:root {
  --brand-primary: #0d6efd;
  --brand-secondary: #6c757d;
  --brand-accent: #198754;
  --sidebar-width: 260px;
  --sidebar-collapsed-width: 70px;
  --topnav-height: 56px;
  --transition-speed: 0.3s;
}

body {
  padding-top: var(--topnav-height);
  overflow-x: hidden;
}

/* Top Navigation */
#topNav {
  height: var(--topnav-height);
  z-index: 1030;
  transition: all var(--transition-speed) ease;
}

#topNav .navbar-brand {
  font-weight: 600;
  font-size: 1.1rem;
}

#sidebarToggle {
  text-decoration: none;
  transition: transform 0.2s ease;
}

#sidebarToggle:hover {
  transform: scale(1.1);
}

/* Sidebar Styles */
.sidebar {
  position: fixed;
  top: var(--topnav-height);
  left: 0;
  bottom: 0;
  width: var(--sidebar-width);
  background: var(--bs-body-bg);
  border-right: 1px solid var(--bs-border-color);
  transition: all var(--transition-speed) ease;
  z-index: 1020;
  overflow-x: hidden;
  overflow-y: auto;
}

.sidebar.collapsed {
  width: var(--sidebar-collapsed-width);
}

.sidebar-content {
  display: flex;
  flex-direction: column;
  height: 100%;
  padding: 1rem 0;
}

.sidebar-section {
  padding: 0.5rem 0;
}

.sidebar-divider {
  margin: 1rem 0.75rem;
  border-top: 1px solid var(--bs-border-color);
}

/* Sidebar Navigation Links */
.sidebar .nav-link {
  display: flex;
  align-items: center;
  padding: 0.75rem 1.25rem;
  color: var(--bs-body-color);
  text-decoration: none;
  transition: all 0.2s ease;
  position: relative;
  white-space: nowrap;
  border-left: 3px solid transparent;
}

.sidebar .nav-link:hover {
  background-color: var(--bs-secondary-bg);
  border-left-color: var(--brand-primary);
}

.sidebar .nav-link.active {
  background-color: var(--bs-primary-bg-subtle);
  color: var(--brand-primary);
  font-weight: 600;
  border-left-color: var(--brand-primary);
}

.sidebar .nav-link i {
  font-size: 1.25rem;
  width: 28px;
  text-align: center;
  flex-shrink: 0;
}

.sidebar .nav-link .nav-text {
  margin-left: 0.75rem;
  opacity: 1;
  transition: opacity var(--transition-speed) ease;
}

.sidebar.collapsed .nav-link .nav-text {
  opacity: 0;
  width: 0;
  margin-left: 0;
}

/* Settings Toggle */
.sidebar .settings-toggle {
  cursor: pointer;
}

.sidebar .settings-chevron {
  font-size: 0.875rem;
  transition: transform 0.3s ease;
}

.sidebar .settings-toggle[aria-expanded="true"] .settings-chevron {
  transform: rotate(180deg);
}

.sidebar.collapsed .settings-chevron {
  opacity: 0;
}

/* Settings Submenu */
.settings-submenu {
  background-color: transparent;
  padding-top: 0;
  padding-bottom: 0;
}

.settings-submenu .nav-link {
  padding: 0.75rem 1.25rem;
  font-size: inherit;
}

.sidebar.collapsed .settings-submenu .nav-link {
  padding-left: 1.25rem;
}

/* Settings Category Toggles */
.sidebar .settings-category-toggle {
  cursor: pointer;
  padding: 0.75rem 1.25rem 0.75rem 2.5rem;
  font-size: inherit;
  font-weight: normal;
  color: var(--bs-body-color);
  border-left: 3px solid transparent;
}

.sidebar .settings-category-toggle:hover {
  background-color: var(--bs-secondary-bg);
  border-left-color: var(--brand-primary);
}

.sidebar .settings-category-toggle[aria-expanded="true"] {
  background-color: transparent;
  border-left-color: transparent;
}

.sidebar .category-chevron {
  font-size: 0.875rem;
  transition: transform 0.3s ease;
}

.sidebar .settings-category-toggle[aria-expanded="true"] .category-chevron {
  transform: rotate(180deg);
}

.sidebar.collapsed .category-chevron {
  opacity: 0;
}

/* Settings Category Items */
.settings-category {
  background-color: transparent;
  padding: 0;
}

.sidebar.collapsed .settings-category {
  padding: 0;
}

.settings-items .nav-link {
  padding: 0.75rem 1.25rem 0.75rem 3.5rem;
  font-size: inherit;
  border-left: 3px solid transparent;
}

.settings-items .nav-link:hover {
  background-color: var(--bs-secondary-bg);
  border-left-color: var(--brand-primary);
}

.settings-items .nav-link.active {
  background-color: var(--bs-primary-bg-subtle);
  color: var(--brand-primary);
  font-weight: 600;
  border-left-color: var(--brand-primary);
}

.sidebar.collapsed .settings-items .nav-link {
  padding-left: 1.25rem;
}

.settings-items .nav-link i {
  font-size: 1.25rem;
  width: 28px;
  text-align: center;
  flex-shrink: 0;
}

/* Collapsed sidebar - hide category structure */
.sidebar.collapsed .settings-category {
  display: none !important;
}

.sidebar.collapsed .settings-category-toggle {
  padding-left: 1.25rem;
}

/* Main Content Area */
.main-content {
  margin-left: var(--sidebar-width);
  padding: 2rem;
  min-height: calc(100vh - var(--topnav-height));
  transition: margin-left var(--transition-speed) ease;
}

.sidebar.collapsed ~ .main-content {
  margin-left: var(--sidebar-collapsed-width);
}

/* Responsive Design */
@media (max-width: 768px) {
  .sidebar {
    transform: translateX(-100%);
    z-index: 1040;
  }
  
  .sidebar.show {
    transform: translateX(0);
    box-shadow: 2px 0 8px rgba(0,0,0,0.15);
  }
  
  .sidebar.collapsed {
    transform: translateX(-100%);
  }
  
  .main-content {
    margin-left: 0 !important;
  }
  
  #sidebarToggle {
    display: block;
  }
}

@media (min-width: 769px) {
  .sidebar {
    transform: translateX(0);
  }
}

/* Hide sidebar and adjust content on login page */
body.login-page .sidebar {
  display: none;
}

body.login-page .main-content {
  margin-left: 0;
}

body.login-page #topNav {
  display: none;
}

/* Cards and Components */
#app {
  min-height: 70vh;
}

.card {
  border-radius: 0.5rem;
  border: 1px solid var(--bs-border-color);
}

.card-header {
  background-color: var(--bs-secondary-bg);
  border-bottom: 1px solid var(--bs-border-color);
  font-weight: 600;
}

/* Stats Cards */
.stat-card {
  border-left: 4px solid var(--brand-primary);
}

.stat-card .stat-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 0.5rem;
  font-size: 1.5rem;
  color: white;
}

.stat-card .stat-value {
  font-size: 2rem;
  font-weight: 700;
  margin: 0;
}

.stat-card .stat-label {
  color: var(--bs-secondary-color);
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* Utility Classes */
.text-truncate-2 {
  display: -webkit-box;
  -webkit-line-clamp: 2;
  line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* Animation */
@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in {
  animation: slideIn 0.3s ease;
}