/**
 * CBN Theme - Industrial Design System
 * Based on DESIGN.md
 * 
 * Color Palette:
 * - Industrial Blue: #1E3A5F (primary)
 * - Steel Gray: #2D3748 (secondary)
 * - Safety Green: #10B981 (success)
 * - Warning Amber: #F59E0B (warning)
 * - Danger Red: #DC2626 (danger)
 * - Alert Blue: #3B82F6 (info)
 */

/* ============================================
   CSS CUSTOM PROPERTIES (Variables)
   ============================================ */

:root {
  /* Primary Colors */
  --cbn-primary: #1E3A5F;
  --cbn-primary-dark: #152a45;
  --cbn-primary-light: #2d4f7a;
  
  /* Secondary Colors */
  --cbn-secondary: #2D3748;
  --cbn-secondary-light: #4A5568;
  
  /* Status Colors */
  --cbn-success: #10B981;
  --cbn-success-light: #D1FAE5;
  --cbn-success-dark: #059669;
  
  --cbn-warning: #F59E0B;
  --cbn-warning-light: #FEF3C7;
  --cbn-warning-dark: #D97706;
  
  --cbn-danger: #DC2626;
  --cbn-danger-light: #FEE2E2;
  --cbn-danger-dark: #B91C1C;
  
  --cbn-info: #3B82F6;
  --cbn-info-light: #DBEAFE;
  --cbn-info-dark: #2563EB;
  
  /* Surface Colors */
  --cbn-surface-dark: #1A202C;
  --cbn-surface-light: #F8FAFC;
  --cbn-card-bg: #FFFFFF;
  --cbn-border: #CBD5E1;
  --cbn-border-light: #E2E8F0;
  
  /* Text Colors */
  --cbn-text-primary: #1E293B;
  --cbn-text-secondary: #64748B;
  --cbn-text-muted: #94A3B8;
  --cbn-text-inverse: #FFFFFF;
  
  /* Typography */
  --cbn-font-sans: 'IBM Plex Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --cbn-font-mono: 'IBM Plex Mono', 'Courier New', monospace;
  
  /* Spacing */
  --cbn-space-xs: 4px;
  --cbn-space-sm: 8px;
  --cbn-space-md: 16px;
  --cbn-space-lg: 24px;
  --cbn-space-xl: 32px;
  --cbn-space-2xl: 48px;
  
  /* Border Radius */
  --cbn-radius-sm: 4px;
  --cbn-radius: 6px;
  --cbn-radius-lg: 8px;
  
  /* Shadows */
  --cbn-shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --cbn-shadow: 0 1px 3px rgba(0,0,0,0.1), 0 1px 2px rgba(0,0,0,0.06);
  --cbn-shadow-lg: 0 4px 6px rgba(0,0,0,0.1), 0 2px 4px rgba(0,0,0,0.06);
  --cbn-shadow-xl: 0 10px 15px rgba(0,0,0,0.1), 0 4px 6px rgba(0,0,0,0.05);
  
  /* Sidebar */
  --cbn-sidebar-bg: #1A202C;
  --cbn-sidebar-width: 240px;
  --cbn-sidebar-narrow: 46px;
}

/* ============================================
   TYPOGRAPHY
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Mono:wght@400;500;600&family=IBM+Plex+Sans:wght@400;500;600;700&display=swap');

body {
  font-family: var(--cbn-font-sans);
  color: var(--cbn-text-primary);
}

/* Headings */
h1, h2, h3, h4, h5, h6,
.h1, .h2, .h3, .h4, .h5, .h6 {
  font-family: var(--cbn-font-sans);
  font-weight: 600;
  color: var(--cbn-text-primary);
}

.page-header h2,
.page-title {
  font-size: 28px;
  font-weight: 600;
  color: var(--cbn-text-primary);
}

/* Monospace for data */
code, pre, .font-mono {
  font-family: var(--cbn-font-mono);
}

/* ============================================
   BUTTONS
   ============================================ */

.btn-primary {
  background-color: var(--cbn-primary);
  border-color: var(--cbn-primary);
  border-radius: var(--cbn-radius);
  font-weight: 600;
  padding: 10px 20px;
  transition: all 0.2s ease;
}

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

.btn-primary:focus {
  box-shadow: 0 0 0 3px rgba(30, 58, 95, 0.25);
}

.btn-secondary {
  color: var(--cbn-primary);
  border-color: var(--cbn-primary);
  background-color: transparent;
  border-radius: var(--cbn-radius);
  font-weight: 600;
}

.btn-secondary:hover {
  background-color: #F1F5F9;
  color: var(--cbn-primary-dark);
}

.btn-success {
  background-color: var(--cbn-success);
  border-color: var(--cbn-success);
  font-weight: 600;
  border-radius: var(--cbn-radius);
}

.btn-success:hover {
  background-color: var(--cbn-success-dark);
  border-color: var(--cbn-success-dark);
}

.btn-danger {
  background-color: var(--cbn-danger);
  border-color: var(--cbn-danger);
  font-weight: 600;
  border-radius: var(--cbn-radius);
}

.btn-danger:hover {
  background-color: var(--cbn-danger-dark);
  border-color: var(--cbn-danger-dark);
}

.btn-warning {
  background-color: var(--cbn-warning);
  border-color: var(--cbn-warning);
  color: var(--cbn-text-primary);
  font-weight: 600;
  border-radius: var(--cbn-radius);
}

.btn-warning:hover {
  background-color: var(--cbn-warning-dark);
  border-color: var(--cbn-warning-dark);
  color: var(--cbn-text-primary);
}

.btn-info {
  background-color: var(--cbn-info);
  border-color: var(--cbn-info);
  font-weight: 600;
  border-radius: var(--cbn-radius);
}

.btn-info:hover {
  background-color: var(--cbn-info-dark);
  border-color: var(--cbn-info-dark);
}

/* ============================================
   CARDS
   ============================================ */

.card {
  background-color: var(--cbn-card-bg);
  border: 1px solid var(--cbn-border);
  border-radius: var(--cbn-radius-lg);
  box-shadow: var(--cbn-shadow);
}

.card-header {
  background-color: transparent;
  border-bottom: 1px solid var(--cbn-border-light);
  padding: 16px 20px;
  font-weight: 600;
  color: var(--cbn-text-primary);
}

.card-body {
  padding: 20px;
}

.card-title {
  font-size: 18px;
  font-weight: 600;
  color: var(--cbn-text-primary);
  margin-bottom: var(--cbn-space-md);
}

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

.card-stat.success {
  border-left-color: var(--cbn-success);
}

.card-stat.warning {
  border-left-color: var(--cbn-warning);
}

.card-stat.danger {
  border-left-color: var(--cbn-danger);
}

.card-stat.info {
  border-left-color: var(--cbn-info);
}

/* ============================================
   TABLES
   ============================================ */

.table {
  font-size: 14px;
}

.table thead th {
  background-color: #F1F5F9;
  color: var(--cbn-text-primary);
  font-weight: 600;
  border-bottom: 2px solid var(--cbn-border-light);
  padding: 12px 16px;
  text-transform: none;
  letter-spacing: 0;
}

.table thead th:first-child {
  border-top-left-radius: var(--cbn-radius);
}

.table thead th:last-child {
  border-top-right-radius: var(--cbn-radius);
}

.table td {
  padding: 12px 16px;
  vertical-align: middle;
  border-bottom: 1px solid var(--cbn-border-light);
}

.table tbody tr {
  height: 48px;
}

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

.table tbody tr:nth-child(even) {
  background-color: #FAFAFA;
}

.table tbody tr:nth-child(even):hover {
  background-color: var(--cbn-surface-light);
}

/* ============================================
   FORMS
   ============================================ */

.form-control,
.form-select {
  border: 1px solid var(--cbn-border);
  border-radius: var(--cbn-radius);
  padding: 10px 14px;
  font-size: 14px;
  transition: all 0.2s ease;
}

.form-control:focus,
.form-select:focus {
  border-color: var(--cbn-primary);
  box-shadow: 0 0 0 3px rgba(30, 58, 95, 0.1);
}

.form-label {
  font-weight: 500;
  color: var(--cbn-text-secondary);
  font-size: 14px;
  margin-bottom: 6px;
}

.input-group-text {
  background-color: #F1F5F9;
  border: 1px solid var(--cbn-border);
  color: var(--cbn-text-muted);
}

/* ============================================
   SIDEBAR (Dark Theme)
   ============================================ */

.sidebar {
  background-color: var(--cbn-surface-dark);
}

.sidebar-brand {
  background-color: var(--cbn-surface-dark);
  border-bottom: 1px solid rgba(255,255,255,0.1);
}

.sidebar-brand h4 a {
  color: var(--cbn-text-inverse) !important;
}

.sidebar-nav .nav-link {
  color: #E2E8F0;
  padding: 12px 16px;
  transition: all 0.2s ease;
}

.sidebar-nav .nav-link:hover {
  background-color: var(--cbn-secondary);
  color: var(--cbn-text-inverse);
}

.sidebar-nav .nav-link.active {
  background-color: var(--cbn-primary);
  color: var(--cbn-text-inverse);
}

.sidebar-nav .nav-link.active .nav-icon {
  color: var(--cbn-success);
}

.sidebar-nav .nav-icon {
  color: #A0AEC0;
  width: 20px;
  height: 20px;
}

.sidebar-nav .nav-link:hover .nav-icon {
  color: var(--cbn-text-inverse);
}

.nav-group-toggle {
  color: #E2E8F0;
}

.nav-group-items {
  background-color: rgba(0,0,0,0.2);
}

/* ============================================
   STATUS BADGES
   ============================================ */

.badge-success {
  background-color: var(--cbn-success-light);
  color: #065F46;
  font-weight: 500;
}

.badge-warning {
  background-color: var(--cbn-warning-light);
  color: #92400E;
  font-weight: 500;
}

.badge-danger {
  background-color: var(--cbn-danger-light);
  color: #991B1B;
  font-weight: 500;
}

.badge-info {
  background-color: var(--cbn-info-light);
  color: #1E40AF;
  font-weight: 500;
}

.badge-secondary {
  background-color: #F1F5F9;
  color: #475569;
  font-weight: 500;
}

/* Status dot indicators */
.status-dot {
  display: inline-block;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  margin-right: 8px;
}

.status-dot.online {
  background-color: var(--cbn-success);
  box-shadow: 0 0 0 2px var(--cbn-success-light);
}

.status-dot.offline {
  background-color: var(--cbn-danger);
  box-shadow: 0 0 0 2px var(--cbn-danger-light);
}

.status-dot.warning {
  background-color: var(--cbn-warning);
  box-shadow: 0 0 0 2px var(--cbn-warning-light);
}

/* ============================================
   ALERTS & NOTIFICATIONS
   ============================================ */

.alert-success {
  background-color: var(--cbn-success-light);
  border-color: var(--cbn-success);
  color: #065F46;
  border-radius: var(--cbn-radius);
}

.alert-warning {
  background-color: var(--cbn-warning-light);
  border-color: var(--cbn-warning);
  color: #92400E;
  border-radius: var(--cbn-radius);
}

.alert-danger {
  background-color: var(--cbn-danger-light);
  border-color: var(--cbn-danger);
  color: #991B1B;
  border-radius: var(--cbn-radius);
}

.alert-info {
  background-color: var(--cbn-info-light);
  border-color: var(--cbn-info);
  color: #1E40AF;
  border-radius: var(--cbn-radius);
}

/* ============================================
   PAGINATION & DROPDOWNS
   ============================================ */

.page-link {
  color: var(--cbn-primary);
  border-color: var(--cbn-border);
  border-radius: var(--cbn-radius);
}

.page-link:hover {
  background-color: var(--cbn-surface-light);
  border-color: var(--cbn-border);
  color: var(--cbn-primary-dark);
}

.page-item.active .page-link {
  background-color: var(--cbn-primary);
  border-color: var(--cbn-primary);
}

.dropdown-menu {
  border: 1px solid var(--cbn-border);
  border-radius: var(--cbn-radius);
  box-shadow: var(--cbn-shadow-lg);
}

.dropdown-item:hover {
  background-color: var(--cbn-surface-light);
  color: var(--cbn-primary);
}

/* ============================================
   MODALS
   ============================================ */

.modal-content {
  border: none;
  border-radius: var(--cbn-radius-lg);
  box-shadow: var(--cbn-shadow-xl);
}

.modal-header {
  border-bottom: 1px solid var(--cbn-border-light);
  padding: 20px 24px;
}

.modal-title {
  font-weight: 600;
  color: var(--cbn-text-primary);
}

.modal-body {
  padding: 24px;
}

.modal-footer {
  border-top: 1px solid var(--cbn-border-light);
  padding: 16px 24px;
}

/* ============================================
   LOGIN PAGE
   ============================================ */

.bg-light {
  background-color: var(--cbn-surface-light) !important;
}

.login-card {
  background-color: var(--cbn-card-bg);
  border-radius: var(--cbn-radius-lg);
  box-shadow: var(--cbn-shadow-lg);
}

/* ============================================
   DASHBOARD SPECIFIC
   ============================================ */

.dashboard-stat {
  position: relative;
  overflow: hidden;
}

.dashboard-stat::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
}

.dashboard-stat.primary::before {
  background-color: var(--cbn-primary);
}

.dashboard-stat.success::before {
  background-color: var(--cbn-success);
}

.dashboard-stat.warning::before {
  background-color: var(--cbn-warning);
}

.dashboard-stat.danger::before {
  background-color: var(--cbn-danger);
}

.stat-value {
  font-size: 32px;
  font-weight: 700;
  color: var(--cbn-text-primary);
  font-family: var(--cbn-font-mono);
}

.stat-label {
  font-size: 14px;
  color: var(--cbn-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* ============================================
   CHART CONTAINERS
   ============================================ */

.chart-container {
  position: relative;
  padding: var(--cbn-space-md);
  background-color: var(--cbn-card-bg);
  border: 1px solid var(--cbn-border);
  border-radius: var(--cbn-radius-lg);
}

/* ============================================
   UTILITY CLASSES
   ============================================ */

.text-primary {
  color: var(--cbn-primary) !important;
}

.text-success {
  color: var(--cbn-success) !important;
}

.text-warning {
  color: var(--cbn-warning) !important;
}

.text-danger {
  color: var(--cbn-danger) !important;
}

.text-info {
  color: var(--cbn-info) !important;
}

.bg-primary {
  background-color: var(--cbn-primary) !important;
}

.bg-success {
  background-color: var(--cbn-success) !important;
}

.bg-warning {
  background-color: var(--cbn-warning) !important;
}

.bg-danger {
  background-color: var(--cbn-danger) !important;
}

.bg-dark-surface {
  background-color: var(--cbn-surface-dark) !important;
}

/* Border colors */
.border-primary {
  border-color: var(--cbn-primary) !important;
}

.border-success {
  border-color: var(--cbn-success) !important;
}

.border-warning {
  border-color: var(--cbn-warning) !important;
}

.border-danger {
  border-color: var(--cbn-danger) !important;
}

/* ============================================
   RESPONSIVE ADJUSTMENTS
   ============================================ */

@media (max-width: 768px) {
  .page-header h2,
  .page-title {
    font-size: 22px;
  }
  
  .stat-value {
    font-size: 24px;
  }
  
  .card-body {
    padding: 16px;
  }
  
  .table thead th,
  .table td {
    padding: 10px 12px;
  }
}

/* ============================================
   ANIMATIONS (Subtle)
   ============================================ */

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.card {
  animation: slideUp 0.3s ease-out;
}

.btn {
  transition: all 0.2s ease;
}

/* ============================================
   PRINT STYLES
   ============================================ */

@media print {
  .sidebar,
  .btn,
  .no-print {
    display: none !important;
  }
  
  .card {
    box-shadow: none;
    border: 1px solid #ddd;
  }
  
  body {
    background: white;
  }
}