/* ==============================================
   AI Video Surveillance System - Dark Theme CSS
   Modern security dashboard with dark console theme
   ============================================== */

:root {
  /* Colors */
  --bg-primary: #0d1117;
  --bg-secondary: #161b22;
  --bg-tertiary: #21262d;
  --bg-hover: #30363d;
  --border: #30363d;
  --border-light: #484f58;
  
  --text-primary: #f0f6fc;
  --text-secondary: #8b949e;
  --text-muted: #6e7681;
  
  --accent: #5b6ef7;
  --accent-hover: #7988f5;
  --accent-subtle: rgba(91, 110, 247, 0.15);
  
  --success: #3fb950;
  --success-subtle: rgba(63, 185, 80, 0.15);
  --warning: #d29922;
  --warning-subtle: rgba(210, 153, 34, 0.15);
  --danger: #f85149;
  --danger-subtle: rgba(248, 81, 73, 0.15);
  --info: #58a6ff;
  --info-subtle: rgba(88, 166, 255, 0.15);
  
  /* Status colors */
  --status-authorized: #3fb950;
  --status-unauthorized: #f85149;
  --status-unknown: #d29922;
  
  /* Severity colors */
  --severity-critical: #f85149;
  --severity-high: #d29922;
  --severity-medium: #58a6ff;
  --severity-low: #8b949e;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.5);
  
  /* Spacing */
  --sidebar-width: 260px;
  --header-height: 64px;
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;
  
  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-normal: 250ms ease;
}

/* Reset & Base */
*, *::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: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.5;
  min-height: 100vh;
  overflow-x: hidden;
}

/* Loading Screen */
.loading-screen {
  position: fixed;
  inset: 0;
  background: var(--bg-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10000;
  transition: opacity var(--transition-normal), visibility var(--transition-normal);
}

.loading-screen.hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.loader-content {
  text-align: center;
}

.loader-logo svg {
  margin-bottom: 16px;
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.05); opacity: 0.8; }
}

.loader-content h1 {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 24px;
}

.loader-bar {
  width: 200px;
  height: 4px;
  background: var(--bg-tertiary);
  border-radius: 2px;
  overflow: hidden;
  margin: 0 auto 12px;
}

.loader-progress {
  height: 100%;
  background: var(--accent);
  border-radius: 2px;
  animation: loading 1.5s ease-in-out infinite;
}

@keyframes loading {
  0% { width: 0; margin-left: 0; }
  50% { width: 70%; margin-left: 0; }
  100% { width: 0; margin-left: 100%; }
}

.loader-text {
  color: var(--text-secondary);
  font-size: 0.875rem;
}

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

.app.hidden {
  display: none;
}

/* Sidebar */
.sidebar {
  width: var(--sidebar-width);
  background: var(--bg-secondary);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  z-index: 100;
}

.sidebar-header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
}

.logo svg {
  flex-shrink: 0;
}

.logo-text {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text-primary);
}

.sidebar-nav {
  flex: 1;
  padding: 12px 0;
  overflow-y: auto;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 20px;
  color: var(--text-secondary);
  text-decoration: none;
  transition: all var(--transition-fast);
  border-left: 3px solid transparent;
}

.nav-item:hover {
  background: var(--bg-tertiary);
  color: var(--text-primary);
}

.nav-item.active {
  background: var(--accent-subtle);
  color: var(--accent);
  border-left-color: var(--accent);
}

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

.sidebar-footer {
  padding: 16px 20px;
  border-top: 1px solid var(--border);
}

.user-info {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
}

.user-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--bg-tertiary);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
}

.user-avatar svg {
  width: 20px;
  height: 20px;
}

.user-details {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.user-name {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.user-email {
  font-size: 0.75rem;
  color: var(--text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.btn-logout {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 100%;
  padding: 8px 12px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-logout:hover {
  background: var(--bg-tertiary);
  color: var(--danger);
  border-color: var(--danger);
}

.btn-logout svg {
  width: 16px;
  height: 16px;
}

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

/* Page Header */
.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 50;
}

.header-left h1 {
  font-size: 1.25rem;
  font-weight: 600;
}

.header-right {
  display: flex;
  align-items: center;
  gap: 16px;
}

.connection-status {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  background: var(--bg-tertiary);
  border-radius: var(--radius-md);
  font-size: 0.875rem;
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--text-muted);
}

.status-dot.connected {
  background: var(--success);
  box-shadow: 0 0 8px var(--success);
}

.status-dot.connecting {
  background: var(--warning);
  animation: blink 1s ease-in-out infinite;
}

.status-dot.disconnected {
  background: var(--danger);
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

.status-text {
  color: var(--text-secondary);
}

.btn-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-icon:hover {
  background: var(--bg-tertiary);
  color: var(--text-primary);
}

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

/* Page Content */
.page-content {
  display: none;
  padding: 24px;
  flex: 1;
}

.page-content.active {
  display: block;
  animation: fadeIn 0.2s ease;
}

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

/* Stats Grid */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}

.stat-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px;
  display: flex;
  align-items: center;
  gap: 16px;
}

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

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

.stat-icon.cameras {
  background: var(--accent-subtle);
  color: var(--accent);
}

.stat-icon.online {
  background: var(--success-subtle);
  color: var(--success);
}

.stat-icon.alerts {
  background: var(--danger-subtle);
  color: var(--danger);
}

.stat-icon.faces {
  background: var(--info-subtle);
  color: var(--info);
}

.stat-icon.storage {
  background: var(--warning-subtle);
  color: var(--warning);
}

.stat-icon.duration {
  background: var(--success-subtle);
  color: var(--success);
}

.stat-info {
  display: flex;
  flex-direction: column;
}

.stat-value {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--text-primary);
  line-height: 1.2;
}

.stat-label {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

/* Dashboard Grid */
.dashboard-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.card.full-width {
  grid-column: 1 / -1;
}

.card {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
}

.card-header h3 {
  font-size: 0.9375rem;
  font-weight: 600;
}

.card-body {
  padding: 20px;
}

.link {
  color: var(--accent);
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 500;
}

.link:hover {
  text-decoration: underline;
}

/* Badge */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 500;
  background: var(--bg-tertiary);
  color: var(--text-secondary);
}

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

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

.badge.danger {
  background: var(--danger-subtle);
  color: var(--danger);
}

.badge.info {
  background: var(--info-subtle);
  color: var(--info);
}

/* Health Metrics */
.health-metrics {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.metric {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.metric-label {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.metric-bar {
  height: 8px;
  background: var(--bg-tertiary);
  border-radius: 4px;
  overflow: hidden;
}

.metric-fill {
  height: 100%;
  background: var(--accent);
  border-radius: 4px;
  transition: width 0.5s ease;
}

.metric-fill.warning {
  background: var(--warning);
}

.metric-fill.danger {
  background: var(--danger);
}

.metric-value {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-primary);
}

.health-details {
  margin-top: 20px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.detail-row {
  display: flex;
  justify-content: space-between;
  font-size: 0.875rem;
}

.detail-label {
  color: var(--text-secondary);
}

.detail-value {
  color: var(--text-primary);
  font-weight: 500;
}

/* Alert List */
.alert-list, .event-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.alert-item, .event-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 12px;
  background: var(--bg-tertiary);
  border-radius: var(--radius-md);
  border-left: 3px solid var(--border);
}

.alert-item.critical { border-left-color: var(--severity-critical); }
.alert-item.high { border-left-color: var(--severity-high); }
.alert-item.medium { border-left-color: var(--severity-medium); }
.alert-item.low { border-left-color: var(--severity-low); }

.alert-item .alert-icon {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.alert-item.critical .alert-icon { background: var(--severity-critical); color: white; }
.alert-item.high .alert-icon { background: var(--severity-high); color: white; }
.alert-item.medium .alert-icon { background: var(--severity-medium); color: white; }
.alert-item.low .alert-icon { background: var(--severity-low); color: white; }

.alert-item-icon svg {
  width: 16px;
  height: 16px;
}

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

.alert-item-title {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.alert-item-message {
  font-size: 0.8125rem;
  color: var(--text-secondary);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.alert-item-time {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 48px 24px;
  text-align: center;
  color: var(--text-muted);
}

.empty-state svg {
  width: 48px;
  height: 48px;
  margin-bottom: 16px;
  opacity: 0.5;
}

.empty-state p {
  margin-bottom: 16px;
}

.empty-state-small {
  padding: 24px;
  text-align: center;
  color: var(--text-muted);
}

/* Camera Grid */
.camera-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 16px;
}

.camera-item {
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 16px;
  text-align: center;
  transition: all var(--transition-fast);
}

.camera-item:hover {
  border-color: var(--border-light);
}

.camera-item .camera-icon {
  width: 40px;
  height: 40px;
  margin: 0 auto 12px;
  border-radius: 50%;
  background: var(--accent-subtle);
  display: flex;
  align-items: center;
  justify-content: center;
}

.camera-item .camera-icon svg {
  width: 20px;
  height: 20px;
  color: var(--accent);
}

.camera-item .camera-name {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: 4px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.camera-item .camera-status {
  font-size: 0.75rem;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
}

.camera-item .camera-status.online { color: var(--success); }
.camera-item .camera-status.offline { color: var(--danger); }

/* Monitoring Layout */
.monitoring-layout {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 24px;
  height: calc(100vh - var(--header-height) - 120px);
}

.video-container {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.video-frame {
  flex: 1;
  position: relative;
  background: #000;
  min-height: 300px;
}

.video-frame video {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

#overlay-canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

.video-placeholder {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: #000;
  color: var(--text-muted);
  gap: 12px;
}

.video-placeholder svg {
  width: 64px;
  height: 64px;
  opacity: 0.3;
}

.video-placeholder h3 {
  font-size: 1.125rem;
  color: var(--text-secondary);
}

.video-placeholder p {
  font-size: 0.875rem;
}

.video-controls {
  display: flex;
  gap: 12px;
  padding: 16px;
  border-top: 1px solid var(--border);
  background: var(--bg-secondary);
}

.video-controls .btn {
  display: flex;
  align-items: center;
  gap: 8px;
}

.video-controls .btn svg {
  width: 18px;
  height: 18px;
}

.monitoring-sidebar {
  display: flex;
  flex-direction: column;
  gap: 16px;
  overflow-y: auto;
}

.detection-results {
  min-height: 100px;
}

.detection-result {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px;
  background: var(--bg-tertiary);
  border-radius: var(--radius-md);
  margin-bottom: 8px;
}

.detection-result .detection-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  object-fit: cover;
  background: var(--bg-hover);
}

.detection-result .detection-info {
  flex: 1;
  min-width: 0;
}

.detection-result .detection-name {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-primary);
}

.detection-result .detection-confidence {
  font-size: 0.75rem;
  color: var(--text-secondary);
}

.detection-result .detection-status {
  font-size: 0.75rem;
  padding: 2px 8px;
  border-radius: 999px;
}

.detection-result .detection-status.authorized {
  background: var(--success-subtle);
  color: var(--success);
}

.detection-result .detection-status.unauthorized {
  background: var(--danger-subtle);
  color: var(--danger);
}

.detection-result .detection-status.unknown {
  background: var(--warning-subtle);
  color: var(--warning);
}

.info-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.info-item {
  display: flex;
  justify-content: space-between;
  font-size: 0.875rem;
}

.info-label {
  color: var(--text-secondary);
}

.info-value {
  color: var(--text-primary);
  font-weight: 500;
}

/* Page Actions */
.page-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
  gap: 16px;
  flex-wrap: wrap;
}

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

.search-box svg {
  position: absolute;
  left: 12px;
  width: 18px;
  height: 18px;
  color: var(--text-muted);
  pointer-events: none;
}

.search-box input {
  padding: 8px 12px 8px 40px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 0.875rem;
  width: 250px;
}

.search-box input:focus {
  outline: none;
  border-color: var(--accent);
}

.filter-group {
  display: flex;
  gap: 12px;
}

.filter-group select {
  padding: 8px 12px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 0.875rem;
}

.filter-group select:focus {
  outline: none;
  border-color: var(--accent);
}

/* Button */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 16px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
}

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

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

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

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

.btn-block {
  width: 100%;
}

.btn svg {
  width: 16px;
  height: 16px;
}

/* Form */
.form-group {
  margin-bottom: 16px;
}

.form-group label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 6px;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 10px 12px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 0.875rem;
  transition: border-color var(--transition-fast);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--accent);
}

.form-group textarea {
  resize: vertical;
  min-height: 80px;
}

.form-help {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 4px;
}

/* Toggle */
.toggle {
  position: relative;
  display: inline-block;
  width: 48px;
  height: 24px;
}

.toggle input {
  opacity: 0;
  width: 0;
  height: 0;
}

.toggle-slider {
  position: absolute;
  cursor: pointer;
  inset: 0;
  background: var(--bg-tertiary);
  border-radius: 24px;
  transition: var(--transition-fast);
}

.toggle-slider::before {
  content: "";
  position: absolute;
  height: 18px;
  width: 18px;
  left: 3px;
  bottom: 3px;
  background: var(--text-secondary);
  border-radius: 50%;
  transition: var(--transition-fast);
}

.toggle input:checked + .toggle-slider {
  background: var(--accent);
}

.toggle input:checked + .toggle-slider::before {
  transform: translateX(24px);
  background: white;
}

/* Modal */
.modal {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 24px;
}

.modal.hidden {
  display: none;
}

.modal-content {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  width: 100%;
  max-width: 480px;
  max-height: 90vh;
  overflow-y: auto;
}

.modal-content.auth-modal {
  max-width: 400px;
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
}

.modal-header h3 {
  font-size: 1rem;
  font-weight: 600;
}

.modal-close {
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 1.5rem;
  cursor: pointer;
  padding: 4px;
  line-height: 1;
}

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

.modal-content form {
  padding: 20px;
}

.modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: 12px;
  margin-top: 20px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
}

.auth-tabs {
  display: flex;
  gap: 4px;
  padding: 12px 20px;
  background: var(--bg-tertiary);
  border-bottom: 1px solid var(--border);
}

.auth-tab {
  flex: 1;
  padding: 8px;
  background: transparent;
  border: none;
  color: var(--text-secondary);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.auth-tab.active {
  background: var(--accent);
  color: white;
}

.auth-tab:hover:not(.active) {
  background: var(--bg-hover);
  color: var(--text-primary);
}

.auth-form {
  display: none;
}

.auth-form.active {
  display: block;
}

.auth-form h2 {
  font-size: 1.125rem;
  margin-bottom: 20px;
}

.auth-error {
  margin-top: 12px;
  padding: 8px 12px;
  background: var(--danger-subtle);
  color: var(--danger);
  border-radius: var(--radius-sm);
  font-size: 0.8125rem;
}

.auth-error:empty {
  display: none;
}

/* Face Grid */
.face-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 16px;
}

.face-card {
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 16px;
  text-align: center;
  transition: all var(--transition-fast);
}

.face-card:hover {
  border-color: var(--border-light);
  transform: translateY(-2px);
}

.face-card .face-avatar {
  width: 80px;
  height: 80px;
  margin: 0 auto 12px;
  border-radius: 50%;
  object-fit: cover;
  background: var(--bg-hover);
  border: 2px solid var(--border);
}

.face-card .face-avatar.placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
}

.face-card .face-avatar.placeholder svg {
  width: 32px;
  height: 32px;
}

.face-card .face-name {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.face-card .face-status {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 2px 8px;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 500;
  margin-bottom: 8px;
}

.face-card .face-status.authorized {
  background: var(--success-subtle);
  color: var(--success);
}

.face-card .face-status.unauthorized {
  background: var(--danger-subtle);
  color: var(--danger);
}

.face-card .face-status.unknown {
  background: var(--warning-subtle);
  color: var(--warning);
}

.face-card .face-actions {
  display: flex;
  gap: 8px;
  justify-content: center;
}

.face-card .face-actions button {
  padding: 4px 8px;
  font-size: 0.75rem;
}

/* People List */
.people-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.person-card {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
}

.person-card .person-avatar {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  object-fit: cover;
  background: var(--bg-hover);
  flex-shrink: 0;
}

.person-card .person-avatar.placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
}

.person-card .person-avatar.placeholder svg {
  width: 28px;
  height: 28px;
}

.person-card .person-info {
  flex: 1;
  min-width: 0;
}

.person-card .person-name {
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.person-card .person-meta {
  font-size: 0.8125rem;
  color: var(--text-secondary);
}

.person-card .person-status {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}

.person-card .person-status.authorized { background: var(--status-authorized); }
.person-card .person-status.unauthorized { background: var(--status-unauthorized); }
.person-card .person-status.unknown { background: var(--status-unknown); }

/* Page Tabs */
.page-tabs {
  display: flex;
  gap: 16px;
  margin-bottom: 20px;
}

.tab {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-size: 0.875rem;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.tab:hover {
  background: var(--bg-tertiary);
  color: var(--text-primary);
}

.tab.active {
  background: var(--bg-secondary);
  border-color: var(--accent);
  color: var(--accent);
}

.tab .status-dot {
  width: 8px;
  height: 8px;
}

.tab .status-dot.authorized { background: var(--status-authorized); }
.tab .status-dot.unauthorized { background: var(--status-unauthorized); }
.tab .status-dot.unknown { background: var(--status-unknown); }

/* Alert History */
.alert-history {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.alert-history-item {
  display: flex;
  gap: 16px;
  padding: 16px;
  background: var(--bg-tertiary);
  border-radius: var(--radius-md);
  border-left: 4px solid var(--border);
}

.alert-history-item.critical { border-left-color: var(--severity-critical); }
.alert-history-item.high { border-left-color: var(--severity-high); }
.alert-history-item.medium { border-left-color: var(--severity-medium); }
.alert-history-item.low { border-left-color: var(--severity-low); }

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

.alert-history-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 8px;
}

.alert-history-title {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--text-primary);
}

.alert-history-message {
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.alert-history-meta {
  display: flex;
  gap: 16px;
  font-size: 0.75rem;
  color: var(--text-muted);
}

.alert-history-actions {
  display: flex;
  gap: 8px;
  margin-top: 8px;
}

.alert-history-actions button {
  padding: 4px 8px;
  font-size: 0.75rem;
}

/* Event History */
.event-history {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.event-history-item {
  display: flex;
  gap: 16px;
  padding: 16px;
  background: var(--bg-tertiary);
  border-radius: var(--radius-md);
}

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

.event-history-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 8px;
}

.event-history-type {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 0.8125rem;
  font-weight: 500;
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  background: var(--info-subtle);
  color: var(--info);
}

.event-history-title {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.event-history-meta {
  display: flex;
  gap: 16px;
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* Camera Settings List */
.camera-settings-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.camera-setting-item {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px;
  background: var(--bg-tertiary);
  border-radius: var(--radius-md);
}

.camera-setting-info {
  flex: 1;
}

.camera-setting-name {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.camera-setting-location {
  font-size: 0.8125rem;
  color: var(--text-secondary);
}

.camera-setting-actions {
  display: flex;
  gap: 8px;
}

.camera-setting-actions button {
  padding: 6px 12px;
  font-size: 0.8125rem;
}

/* Buffer Info */
.buffer-info {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 16px;
}

.buffer-stat {
  text-align: center;
  padding: 16px;
  background: var(--bg-tertiary);
  border-radius: var(--radius-md);
}

.buffer-stat-value {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--text-primary);
}

.buffer-stat-label {
  font-size: 0.8125rem;
  color: var(--text-secondary);
  margin-top: 4px;
}

/* Segments List */
.segments-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  max-height: 300px;
  overflow-y: auto;
}

.segment-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px;
  background: var(--bg-tertiary);
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
}

.segment-item .segment-info {
  flex: 1;
}

.segment-item .segment-name {
  font-weight: 500;
  color: var(--text-primary);
}

.segment-item .segment-meta {
  color: var(--text-muted);
  font-size: 0.75rem;
}

.segment-item .segment-size {
  color: var(--text-secondary);
}

/* Health Overview */
.health-overview {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.health-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.health-item {
  text-align: center;
  padding: 16px;
  background: var(--bg-tertiary);
  border-radius: var(--radius-md);
}

.health-label {
  display: block;
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-bottom: 4px;
}

.health-value {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text-primary);
}

.health-metrics-large {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.metric-large {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.metric-header {
  display: flex;
  justify-content: space-between;
  font-size: 0.875rem;
}

.metric-value-large {
  font-weight: 600;
  color: var(--text-primary);
}

.metric-bar-large {
  height: 12px;
  background: var(--bg-tertiary);
  border-radius: 6px;
  overflow: hidden;
}

.metric-fill-large {
  height: 100%;
  background: var(--accent);
  border-radius: 6px;
  transition: width 0.5s ease;
}

.metric-fill-large.warning {
  background: var(--warning);
}

.metric-fill-large.danger {
  background: var(--danger);
}

.storage-metrics {
  display: flex;
  gap: 24px;
  padding: 16px;
  background: var(--bg-tertiary);
  border-radius: var(--radius-md);
}

.storage-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.storage-label {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.storage-value {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
}

/* Cameras Health */
.cameras-health {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 16px;
}

.camera-health-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px;
  background: var(--bg-tertiary);
  border-radius: var(--radius-md);
}

.camera-health-item .camera-health-icon {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.camera-health-item .camera-health-icon.online {
  background: var(--success-subtle);
  color: var(--success);
}

.camera-health-item .camera-health-icon.offline {
  background: var(--danger-subtle);
  color: var(--danger);
}

.camera-health-item .camera-health-icon svg {
  width: 16px;
  height: 16px;
}

.camera-health-item .camera-health-info {
  flex: 1;
}

.camera-health-item .camera-health-name {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-primary);
}

.camera-health-item .camera-health-status {
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* Users List */
.users-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.user-item {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
}

.user-item .user-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--bg-hover);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
}

.user-item .user-avatar svg {
  width: 20px;
  height: 20px;
}

.user-item .user-info {
  flex: 1;
}

.user-item .user-name {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--text-primary);
}

.user-item .user-email {
  font-size: 0.8125rem;
  color: var(--text-secondary);
}

.user-item .user-role {
  display: inline-flex;
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 500;
  background: var(--bg-tertiary);
  color: var(--text-secondary);
}

.user-item .user-role.admin {
  background: var(--danger-subtle);
  color: var(--danger);
}

.user-item .user-actions {
  display: flex;
  gap: 8px;
}

.user-item .user-actions button {
  padding: 4px 8px;
  font-size: 0.75rem;
}

/* Audit Log */
.audit-log {
  display: flex;
  flex-direction: column;
  gap: 8px;
  max-height: 400px;
  overflow-y: auto;
}

.audit-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 12px;
  background: var(--bg-tertiary);
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
}

.audit-item .audit-icon {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.audit-item .audit-icon.create {
  background: var(--success-subtle);
  color: var(--success);
}

.audit-item .audit-icon.update {
  background: var(--info-subtle);
  color: var(--info);
}

.audit-item .audit-icon.delete {
  background: var(--danger-subtle);
  color: var(--danger);
}

.audit-item .audit-icon.security {
  background: var(--warning-subtle);
  color: var(--warning);
}

.audit-item .audit-icon svg {
  width: 12px;
  height: 12px;
}

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

.audit-item .audit-action {
  color: var(--text-primary);
  font-weight: 500;
}

.audit-item .audit-details {
  color: var(--text-muted);
  font-size: 0.75rem;
  margin-top: 2px;
}

.audit-item .audit-time {
  color: var(--text-muted);
  font-size: 0.75rem;
  white-space: nowrap;
}

/* Photo Upload */
.photo-upload {
  position: relative;
}

.photo-preview {
  border: 2px dashed var(--border-light);
  border-radius: var(--radius-md);
  padding: 24px;
  text-align: center;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.photo-preview:hover {
  border-color: var(--accent);
  background: var(--accent-subtle);
}

.photo-preview svg {
  width: 32px;
  height: 32px;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.photo-preview span {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.photo-preview.has-image {
  padding: 0;
  border-style: solid;
  overflow: hidden;
}

.photo-preview img {
  width: 100%;
  height: 200px;
  object-fit: cover;
}

/* Alerts Health */
.alerts-health {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.alert-health-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px;
  background: var(--bg-tertiary);
  border-radius: var(--radius-sm);
  border-left: 3px solid var(--border);
}

.alert-health-item.critical { border-left-color: var(--severity-critical); }
.alert-health-item.high { border-left-color: var(--severity-high); }
.alert-health-item.medium { border-left-color: var(--severity-medium); }

.alert-health-item .alert-health-title {
  flex: 1;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-primary);
}

.alert-health-item .alert-health-time {
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* Diagnostics */
.diagnostics-info {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.diagnostic-item {
  display: flex;
  justify-content: space-between;
  padding: 12px 16px;
  background: var(--bg-tertiary);
  border-radius: var(--radius-sm);
}

.diagnostic-label {
  color: var(--text-secondary);
}

.diagnostic-value {
  font-weight: 500;
  color: var(--text-primary);
}

.diagnostic-value.good {
  color: var(--success);
}

.diagnostic-value.warning {
  color: var(--warning);
}

.diagnostic-value.bad {
  color: var(--danger);
}

.loading {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 48px;
  color: var(--text-muted);
}

/* Scrollbar */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
  background: var(--bg-hover);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--border-light);
}

/* Responsive */
@media (max-width: 1024px) {
  .dashboard-grid {
    grid-template-columns: 1fr;
  }
  
  .monitoring-layout {
    grid-template-columns: 1fr;
    height: auto;
  }
  
  .video-container {
    height: 400px;
  }
  
  .health-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .sidebar {
    width: 60px;
  }
  
  .sidebar .logo-text,
  .sidebar .nav-item span,
  .sidebar .user-details,
  .sidebar .btn-logout span {
    display: none;
  }
  
  .sidebar .nav-item {
    justify-content: center;
    padding: 12px;
  }
  
  .main-content {
    margin-left: 60px;
  }
  
  .page-header {
    padding: 12px 16px;
  }
  
  .page-content {
    padding: 16px;
  }
  
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .stat-card {
    padding: 16px;
  }
  
  .stat-value {
    font-size: 1.25rem;
  }
  
  .health-grid {
    grid-template-columns: 1fr;
  }
  
  .page-actions {
    flex-direction: column;
    align-items: stretch;
  }
  
  .search-box input {
    width: 100%;
  }
  
  .filter-group {
    width: 100%;
  }
  
  .filter-group select {
    flex: 1;
  }
}

@media (max-width: 480px) {
  .stats-grid {
    grid-template-columns: 1fr;
  }
  
  .modal-content {
    max-width: 100%;
    margin: 16px;
    border-radius: var(--radius-md);
  }
}