/* ========================================
   Compass Care NJ - Operations Platform
   Design System & Global Styles
   ======================================== */

/* CSS Custom Properties (Design Tokens) */
:root {
  /* Primary Colors */
  --primary-blue: #1E5A96;
  --primary-blue-dark: #164775;
  --primary-blue-light: #2D6DAB;

  /* Status Colors */
  --success-green: #27AB6C;
  --success-green-light: #E8F5EF;
  --warning-orange: #E97B1D;
  --warning-orange-light: #FEF3E8;
  --error-red: #D32F2F;
  --error-red-light: #FDEAEA;

  /* Neutral Colors */
  --background: #F5F5F5;
  --card-background: #FFFFFF;
  --text-primary: #212121;
  --text-secondary: #666666;
  --text-muted: #999999;
  --border-color: #E0E0E0;
  --border-light: #F0F0F0;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow-md: 0 2px 4px rgba(0,0,0,0.1);
  --shadow-lg: 0 4px 8px rgba(0,0,0,0.12);

  /* Typography */
  --font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 2rem;

  /* Spacing */
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
  --spacing-2xl: 48px;

  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-full: 9999px;

  /* Layout */
  --sidebar-width: 240px;
  --header-height: 64px;
  --content-max-width: 1200px;
}

/* ========================================
   CSS Reset & Base Styles
   ======================================== */

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: 1.5;
  color: var(--text-primary);
  background-color: var(--background);
  min-height: 100vh;
}

a {
  color: var(--primary-blue);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

img {
  max-width: 100%;
  height: auto;
}

button {
  font-family: inherit;
  cursor: pointer;
}

input, textarea, select {
  font-family: inherit;
  font-size: inherit;
}

/* ========================================
   Layout Components
   ======================================== */

/* App Container */
.app-container {
  display: flex;
  min-height: 100vh;
}

/* Sidebar */
.sidebar {
  width: var(--sidebar-width);
  background-color: var(--primary-blue);
  color: white;
  position: fixed;
  top: 0;
  left: 0;
  height: 100vh;
  display: flex;
  flex-direction: column;
  z-index: 100;
  transition: transform 0.3s ease;
}

.sidebar-header {
  padding: var(--spacing-lg);
  border-bottom: 1px solid rgba(255,255,255,0.1);
}

.sidebar-logo {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: white;
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.sidebar-logo svg {
  width: 28px;
  height: 28px;
}

.sidebar-nav {
  flex: 1;
  padding: var(--spacing-md) 0;
  overflow-y: auto;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-md) var(--spacing-lg);
  color: rgba(255,255,255,0.8);
  transition: all 0.2s ease;
  border-left: 3px solid transparent;
}

.nav-item:hover {
  background-color: rgba(255,255,255,0.1);
  color: white;
  text-decoration: none;
}

.nav-item.active {
  background-color: rgba(255,255,255,0.15);
  color: white;
  border-left-color: white;
}

.nav-item svg {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}

.nav-section-title {
  padding: var(--spacing-lg) var(--spacing-lg) var(--spacing-sm);
  font-size: var(--font-size-xs);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: rgba(255,255,255,0.5);
}

/* Main Content Area */
.main-content {
  flex: 1;
  margin-left: var(--sidebar-width);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Header */
.header {
  height: var(--header-height);
  background-color: var(--card-background);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--spacing-lg);
  position: sticky;
  top: 0;
  z-index: 50;
}

.header-title {
  font-size: var(--font-size-xl);
  font-weight: 600;
  color: var(--text-primary);
}

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

/* Page Content */
.page-content {
  flex: 1;
  padding: var(--spacing-lg);
  max-width: var(--content-max-width);
  width: 100%;
  margin: 0 auto;
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
  display: none;
  background: none;
  border: none;
  padding: var(--spacing-sm);
  color: var(--text-primary);
}

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

/* Sidebar Overlay for Mobile */
.sidebar-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(0,0,0,0.5);
  z-index: 90;
}

/* ========================================
   Card Components
   ======================================== */

.card {
  background-color: var(--card-background);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  padding: var(--spacing-lg);
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--spacing-md);
  padding-bottom: var(--spacing-md);
  border-bottom: 1px solid var(--border-light);
}

.card-title {
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--text-primary);
}

.card-subtitle {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  margin-top: var(--spacing-xs);
}

/* Stats Cards */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
}

.stat-card {
  background-color: var(--card-background);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  padding: var(--spacing-lg);
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-md);
}

.stat-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.stat-icon svg {
  width: 24px;
  height: 24px;
}

.stat-icon.blue {
  background-color: rgba(30, 90, 150, 0.1);
  color: var(--primary-blue);
}

.stat-icon.green {
  background-color: var(--success-green-light);
  color: var(--success-green);
}

.stat-icon.orange {
  background-color: var(--warning-orange-light);
  color: var(--warning-orange);
}

.stat-icon.red {
  background-color: var(--error-red-light);
  color: var(--error-red);
}

.stat-content {
  flex: 1;
}

.stat-value {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.2;
}

.stat-label {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  margin-top: var(--spacing-xs);
}

/* ========================================
   Button Components
   ======================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-md);
  font-size: var(--font-size-sm);
  font-weight: 500;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: all 0.2s ease;
  min-height: 44px;
  min-width: 44px;
  text-decoration: none;
}

.btn:hover {
  text-decoration: none;
}

.btn svg {
  width: 18px;
  height: 18px;
}

.btn-primary {
  background-color: var(--primary-blue);
  color: white;
}

.btn-primary:hover {
  background-color: var(--primary-blue-dark);
}

.btn-secondary {
  background-color: var(--background);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover {
  background-color: var(--border-light);
}

.btn-success {
  background-color: var(--success-green);
  color: white;
}

.btn-success:hover {
  background-color: #1F9158;
}

.btn-warning {
  background-color: var(--warning-orange);
  color: white;
}

.btn-warning:hover {
  background-color: #D36B12;
}

.btn-danger {
  background-color: var(--error-red);
  color: white;
}

.btn-danger:hover {
  background-color: #B71C1C;
}

.btn-ghost {
  background-color: transparent;
  color: var(--primary-blue);
}

.btn-ghost:hover {
  background-color: rgba(30, 90, 150, 0.1);
}

.btn-sm {
  padding: var(--spacing-xs) var(--spacing-sm);
  font-size: var(--font-size-xs);
  min-height: 32px;
  min-width: 32px;
}

.btn-lg {
  padding: var(--spacing-md) var(--spacing-lg);
  font-size: var(--font-size-base);
  min-height: 52px;
}

.btn-icon {
  padding: var(--spacing-sm);
}

.btn-block {
  width: 100%;
}

/* Button Group */
.btn-group {
  display: flex;
  gap: var(--spacing-sm);
  flex-wrap: wrap;
}

/* ========================================
   Form Components
   ======================================== */

.form-group {
  margin-bottom: var(--spacing-md);
}

.form-label {
  display: block;
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: var(--spacing-xs);
}

.form-label.required::after {
  content: '*';
  color: var(--error-red);
  margin-left: 4px;
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  font-size: var(--font-size-base);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  background-color: white;
  color: var(--text-primary);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
  min-height: 44px;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--primary-blue);
  box-shadow: 0 0 0 3px rgba(30, 90, 150, 0.1);
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--text-muted);
}

.form-input.error,
.form-select.error,
.form-textarea.error {
  border-color: var(--error-red);
}

.form-textarea {
  min-height: 100px;
  resize: vertical;
}

.form-help {
  font-size: var(--font-size-xs);
  color: var(--text-secondary);
  margin-top: var(--spacing-xs);
}

.form-error {
  font-size: var(--font-size-xs);
  color: var(--error-red);
  margin-top: var(--spacing-xs);
}

/* Search Input */
.search-input-wrapper {
  position: relative;
}

.search-input-wrapper svg {
  position: absolute;
  left: var(--spacing-md);
  top: 50%;
  transform: translateY(-50%);
  width: 18px;
  height: 18px;
  color: var(--text-muted);
}

.search-input {
  padding-left: 44px;
}

/* Checkbox & Radio */
.form-check {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  cursor: pointer;
}

.form-check-input {
  width: 20px;
  height: 20px;
  accent-color: var(--primary-blue);
  cursor: pointer;
}

.form-check-label {
  font-size: var(--font-size-sm);
  color: var(--text-primary);
  cursor: pointer;
}

/* Form Row */
.form-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-md);
}

/* ========================================
   Table Components
   ======================================== */

.table-container {
  overflow-x: auto;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
}

.table {
  width: 100%;
  border-collapse: collapse;
  background-color: var(--card-background);
}

.table th,
.table td {
  padding: var(--spacing-md);
  text-align: left;
  border-bottom: 1px solid var(--border-light);
}

.table th {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--text-secondary);
  background-color: var(--background);
  white-space: nowrap;
}

.table td {
  font-size: var(--font-size-sm);
  color: var(--text-primary);
}

.table tbody tr:hover {
  background-color: var(--background);
}

.table tbody tr:last-child td {
  border-bottom: none;
}

/* Table Actions */
.table-actions {
  display: flex;
  gap: var(--spacing-xs);
}

/* Responsive Table */
@media (max-width: 768px) {
  .table-responsive th,
  .table-responsive td {
    padding: var(--spacing-sm);
  }

  .table-responsive .hide-mobile {
    display: none;
  }
}

/* ========================================
   Badge Components
   ======================================== */

.badge {
  display: inline-flex;
  align-items: center;
  padding: var(--spacing-xs) var(--spacing-sm);
  font-size: var(--font-size-xs);
  font-weight: 500;
  border-radius: var(--radius-full);
  text-transform: capitalize;
}

.badge-success {
  background-color: var(--success-green-light);
  color: var(--success-green);
}

.badge-warning {
  background-color: var(--warning-orange-light);
  color: var(--warning-orange);
}

.badge-danger {
  background-color: var(--error-red-light);
  color: var(--error-red);
}

.badge-info {
  background-color: rgba(30, 90, 150, 0.1);
  color: var(--primary-blue);
}

.badge-neutral {
  background-color: var(--background);
  color: var(--text-secondary);
}

/* ========================================
   Modal Components
   ======================================== */

.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 200;
  padding: var(--spacing-md);
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s ease;
}

.modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

.modal {
  background-color: var(--card-background);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  width: 100%;
  max-width: 500px;
  max-height: 90vh;
  overflow-y: auto;
  transform: translateY(-20px);
  transition: transform 0.3s ease;
}

.modal-overlay.active .modal {
  transform: translateY(0);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-lg);
  border-bottom: 1px solid var(--border-light);
}

.modal-title {
  font-size: var(--font-size-lg);
  font-weight: 600;
}

.modal-close {
  background: none;
  border: none;
  padding: var(--spacing-sm);
  cursor: pointer;
  color: var(--text-secondary);
  border-radius: var(--radius-md);
}

.modal-close:hover {
  background-color: var(--background);
  color: var(--text-primary);
}

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

.modal-body {
  padding: var(--spacing-lg);
}

.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: var(--spacing-sm);
  padding: var(--spacing-lg);
  border-top: 1px solid var(--border-light);
}

.modal-lg {
  max-width: 700px;
}

/* ========================================
   Alert Components
   ======================================== */

.alert {
  padding: var(--spacing-md);
  border-radius: var(--radius-md);
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-md);
}

.alert svg {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  margin-top: 2px;
}

.alert-success {
  background-color: var(--success-green-light);
  color: var(--success-green);
}

.alert-warning {
  background-color: var(--warning-orange-light);
  color: var(--warning-orange);
}

.alert-danger {
  background-color: var(--error-red-light);
  color: var(--error-red);
}

.alert-info {
  background-color: rgba(30, 90, 150, 0.1);
  color: var(--primary-blue);
}

/* ========================================
   Progress Bar
   ======================================== */

.progress-bar {
  height: 8px;
  background-color: var(--border-light);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.progress-bar-fill {
  height: 100%;
  background-color: var(--primary-blue);
  border-radius: var(--radius-full);
  transition: width 0.3s ease;
}

.progress-bar-fill.green {
  background-color: var(--success-green);
}

.progress-bar-fill.orange {
  background-color: var(--warning-orange);
}

.progress-bar-fill.red {
  background-color: var(--error-red);
}

.progress-label {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-xs);
  font-size: var(--font-size-sm);
}

/* ========================================
   Activity List
   ======================================== */

.activity-list {
  list-style: none;
}

.activity-item {
  display: flex;
  gap: var(--spacing-md);
  padding: var(--spacing-md) 0;
  border-bottom: 1px solid var(--border-light);
}

.activity-item:last-child {
  border-bottom: none;
}

.activity-icon {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.activity-icon svg {
  width: 18px;
  height: 18px;
}

.activity-icon.checkin {
  background-color: var(--success-green-light);
  color: var(--success-green);
}

.activity-icon.checkout {
  background-color: var(--warning-orange-light);
  color: var(--warning-orange);
}

.activity-icon.compliance {
  background-color: rgba(30, 90, 150, 0.1);
  color: var(--primary-blue);
}

.activity-content {
  flex: 1;
}

.activity-description {
  font-size: var(--font-size-sm);
  color: var(--text-primary);
}

.activity-time {
  font-size: var(--font-size-xs);
  color: var(--text-muted);
  margin-top: var(--spacing-xs);
}

/* ========================================
   Quick Actions
   ======================================== */

.quick-actions {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: var(--spacing-md);
}

.quick-action-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-lg);
  background-color: var(--card-background);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all 0.2s ease;
  text-decoration: none;
  color: var(--text-primary);
}

.quick-action-btn:hover {
  border-color: var(--primary-blue);
  box-shadow: var(--shadow-md);
  text-decoration: none;
}

.quick-action-btn svg {
  width: 32px;
  height: 32px;
  color: var(--primary-blue);
}

.quick-action-btn span {
  font-size: var(--font-size-sm);
  font-weight: 500;
}

/* ========================================
   Compliance Checklist
   ======================================== */

.compliance-category {
  margin-bottom: var(--spacing-lg);
}

.compliance-category-title {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: var(--spacing-md);
  padding-bottom: var(--spacing-sm);
  border-bottom: 1px solid var(--border-light);
}

.compliance-task {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-md);
  padding: var(--spacing-md);
  background-color: var(--card-background);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  margin-bottom: var(--spacing-sm);
  transition: all 0.2s ease;
}

.compliance-task:hover {
  border-color: var(--primary-blue-light);
}

.compliance-task.completed {
  background-color: var(--success-green-light);
  border-color: var(--success-green);
}

.compliance-checkbox {
  width: 24px;
  height: 24px;
  accent-color: var(--success-green);
  cursor: pointer;
  flex-shrink: 0;
}

.compliance-task-content {
  flex: 1;
}

.compliance-task-title {
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--text-primary);
}

.compliance-task.completed .compliance-task-title {
  text-decoration: line-through;
  color: var(--text-secondary);
}

.compliance-task-desc {
  font-size: var(--font-size-xs);
  color: var(--text-secondary);
  margin-top: var(--spacing-xs);
}

.compliance-task-meta {
  font-size: var(--font-size-xs);
  color: var(--text-muted);
  margin-top: var(--spacing-xs);
}

/* ========================================
   Profile Card
   ======================================== */

.profile-card {
  display: flex;
  gap: var(--spacing-lg);
  padding: var(--spacing-lg);
  background-color: var(--card-background);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
}

.profile-avatar {
  width: 80px;
  height: 80px;
  border-radius: var(--radius-full);
  background-color: var(--primary-blue);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-2xl);
  font-weight: 600;
  flex-shrink: 0;
}

.profile-info {
  flex: 1;
}

.profile-name {
  font-size: var(--font-size-xl);
  font-weight: 600;
  color: var(--text-primary);
}

.profile-meta {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  margin-top: var(--spacing-xs);
}

.profile-details {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-md);
  margin-top: var(--spacing-md);
}

.profile-detail {
  display: flex;
  flex-direction: column;
}

.profile-detail-label {
  font-size: var(--font-size-xs);
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.profile-detail-value {
  font-size: var(--font-size-sm);
  color: var(--text-primary);
  margin-top: var(--spacing-xs);
}

/* ========================================
   Charts (CSS-based)
   ======================================== */

.bar-chart {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.bar-chart-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.bar-chart-label {
  width: 100px;
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  flex-shrink: 0;
}

.bar-chart-bar {
  flex: 1;
  height: 24px;
  background-color: var(--border-light);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.bar-chart-fill {
  height: 100%;
  background-color: var(--primary-blue);
  border-radius: var(--radius-sm);
  transition: width 0.3s ease;
}

.bar-chart-value {
  width: 60px;
  font-size: var(--font-size-sm);
  color: var(--text-primary);
  text-align: right;
  flex-shrink: 0;
}

/* ========================================
   Date Picker
   ======================================== */

.date-range-picker {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  flex-wrap: wrap;
}

.date-input-group {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.date-input-group label {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
}

/* ========================================
   Empty State
   ======================================== */

.empty-state {
  text-align: center;
  padding: var(--spacing-2xl);
}

.empty-state svg {
  width: 64px;
  height: 64px;
  color: var(--text-muted);
  margin-bottom: var(--spacing-md);
}

.empty-state-title {
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--spacing-sm);
}

.empty-state-desc {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  margin-bottom: var(--spacing-lg);
}

/* ========================================
   Loading State
   ======================================== */

.loading {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-2xl);
}

.spinner {
  width: 32px;
  height: 32px;
  border: 3px solid var(--border-color);
  border-top-color: var(--primary-blue);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

/* ========================================
   Tabs
   ======================================== */

.tabs {
  display: flex;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: var(--spacing-lg);
}

.tab {
  padding: var(--spacing-md) var(--spacing-lg);
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--text-secondary);
  border-bottom: 2px solid transparent;
  cursor: pointer;
  transition: all 0.2s ease;
  background: none;
  border-top: none;
  border-left: none;
  border-right: none;
}

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

.tab.active {
  color: var(--primary-blue);
  border-bottom-color: var(--primary-blue);
}

.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
}

/* ========================================
   Training Status Colors
   ======================================== */

.training-current {
  color: var(--success-green);
}

.training-expiring {
  color: var(--warning-orange);
}

.training-expired {
  color: var(--error-red);
}

/* ========================================
   Grid Layouts
   ======================================== */

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-lg);
}

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

@media (max-width: 768px) {
  .grid-2,
  .grid-3 {
    grid-template-columns: 1fr;
  }
}

/* ========================================
   Utility Classes
   ======================================== */

.text-center { text-align: center; }
.text-right { text-align: right; }
.text-muted { color: var(--text-muted); }
.text-success { color: var(--success-green); }
.text-warning { color: var(--warning-orange); }
.text-danger { color: var(--error-red); }

.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }

.flex { display: flex; }
.flex-between { display: flex; justify-content: space-between; align-items: center; }
.flex-center { display: flex; justify-content: center; align-items: center; }
.flex-wrap { flex-wrap: wrap; }
.gap-sm { gap: var(--spacing-sm); }
.gap-md { gap: var(--spacing-md); }

.hidden { display: none !important; }

/* ========================================
   Responsive Design
   ======================================== */

@media (max-width: 1024px) {
  :root {
    --sidebar-width: 200px;
  }
}

@media (max-width: 768px) {
  :root {
    --sidebar-width: 240px;
  }

  .sidebar {
    transform: translateX(-100%);
  }

  .sidebar.open {
    transform: translateX(0);
  }

  .sidebar-overlay.open {
    display: block;
  }

  .main-content {
    margin-left: 0;
  }

  .mobile-menu-toggle {
    display: block;
  }

  .header-title {
    font-size: var(--font-size-lg);
  }

  .page-content {
    padding: var(--spacing-md);
  }

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .stat-card {
    padding: var(--spacing-md);
  }

  .stat-value {
    font-size: var(--font-size-xl);
  }

  .quick-actions {
    grid-template-columns: repeat(2, 1fr);
  }

  .profile-card {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }

  .modal {
    margin: var(--spacing-md);
    max-height: calc(100vh - 32px);
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .date-range-picker {
    flex-direction: column;
    align-items: stretch;
  }
}

@media (max-width: 480px) {
  .stats-grid {
    grid-template-columns: 1fr;
  }

  .btn-group {
    flex-direction: column;
  }

  .btn-group .btn {
    width: 100%;
  }

  .quick-actions {
    grid-template-columns: 1fr;
  }

  .modal-footer {
    flex-direction: column;
  }

  .modal-footer .btn {
    width: 100%;
  }
}

/* ========================================
   Print Styles
   ======================================== */

@media print {
  .sidebar,
  .header,
  .btn,
  .mobile-menu-toggle {
    display: none !important;
  }

  .main-content {
    margin-left: 0;
  }

  .page-content {
    padding: 0;
    max-width: none;
  }

  .card {
    box-shadow: none;
    border: 1px solid var(--border-color);
  }
}