:root {
  --bg-primary: #0f1923;
  --bg-secondary: #1a2733;
  --bg-card: #1e2d3d;
  --bg-hover: #243447;
  --border-color: #2a3f52;
  --text-primary: #e8edf2;
  --text-secondary: #8899aa;
  --text-muted: #5a6f82;
  --accent-blue: #3b82f6;
  --accent-green: #22c55e;
  --accent-red: #ef4444;
  --accent-yellow: #f59e0b;
  --accent-purple: #a855f7;
  --accent-cyan: #06b6d4;
  --shadow: 0 4px 24px rgba(0,0,0,0.3);
  --radius: 12px;
  --radius-sm: 8px;
  --transition: all 0.2s ease;
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  overflow-x: hidden;
}

/* ─── Layout ─── */
.app-layout { display: flex; min-height: 100vh; }

.sidebar {
  width: 260px;
  background: var(--bg-secondary);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  position: fixed;
  height: 100vh;
  z-index: 100;
  transition: var(--transition);
}

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

.sidebar-header .logo {
  width: 40px; height: 40px;
  background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
}

.sidebar-header h1 {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-primary);
}

.sidebar-header small {
  font-size: 11px;
  color: var(--text-muted);
}

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

.nav-section { margin-bottom: 20px; }

.nav-section-title {
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--text-muted);
  padding: 8px 12px;
  font-weight: 600;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  cursor: pointer;
  transition: var(--transition);
  font-size: 14px;
  font-weight: 500;
  border: none;
  background: none;
  width: 100%;
  text-align: left;
}

.nav-item:hover { background: var(--bg-hover); color: var(--text-primary); }
.nav-item.active { background: var(--accent-blue); color: white; }
.nav-item .icon { font-size: 18px; width: 24px; text-align: center; }
.nav-item .badge {
  margin-left: auto;
  background: var(--accent-red);
  color: white;
  font-size: 10px;
  padding: 2px 6px;
  border-radius: 10px;
  font-weight: 700;
}

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

.system-status {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  color: var(--text-secondary);
}

.status-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--accent-green);
  animation: pulse 2s infinite;
}

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

.main-content {
  margin-left: 260px;
  flex: 1;
  min-height: 100vh;
}

.top-bar {
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  padding: 12px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 50;
}

.top-bar h2 { font-size: 18px; font-weight: 600; }

.top-bar-actions { display: flex; gap: 8px; align-items: center; }

.page-content { padding: 24px; }

/* ─── Cards ─── */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  overflow: hidden;
}

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

.card-header h3 { font-size: 15px; font-weight: 600; }
.card-body { padding: 20px; }

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

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 20px;
  position: relative;
  overflow: hidden;
}

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

.stat-card.blue::before { background: var(--accent-blue); }
.stat-card.green::before { background: var(--accent-green); }
.stat-card.yellow::before { background: var(--accent-yellow); }
.stat-card.red::before { background: var(--accent-red); }
.stat-card.purple::before { background: var(--accent-purple); }
.stat-card.cyan::before { background: var(--accent-cyan); }

.stat-icon {
  font-size: 28px;
  margin-bottom: 8px;
}

.stat-value {
  font-size: 28px;
  font-weight: 700;
  line-height: 1;
}

.stat-label {
  font-size: 12px;
  color: var(--text-secondary);
  margin-top: 4px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* ─── Tables ─── */
.table-container { overflow-x: auto; }

table {
  width: 100%;
  border-collapse: collapse;
}

th {
  text-align: left;
  padding: 12px 16px;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-muted);
  font-weight: 600;
  border-bottom: 1px solid var(--border-color);
  white-space: nowrap;
}

td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border-color);
  font-size: 13px;
  vertical-align: middle;
}

tr:hover td { background: var(--bg-hover); }

/* ─── Buttons ─── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid transparent;
  transition: var(--transition);
  white-space: nowrap;
}

.btn-primary { background: var(--accent-blue); color: white; }
.btn-primary:hover { background: #2563eb; }
.btn-success { background: var(--accent-green); color: white; }
.btn-success:hover { background: #16a34a; }
.btn-danger { background: var(--accent-red); color: white; }
.btn-danger:hover { background: #dc2626; }
.btn-warning { background: var(--accent-yellow); color: #000; }
.btn-ghost { background: transparent; color: var(--text-secondary); border-color: var(--border-color); }
.btn-ghost:hover { background: var(--bg-hover); color: var(--text-primary); }
.btn-sm { padding: 5px 10px; font-size: 12px; }
.btn-icon { padding: 8px; width: 36px; height: 36px; justify-content: center; }

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

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

.form-group label {
  display: block;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 6px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.form-input, .form-select, .form-textarea {
  width: 100%;
  padding: 10px 14px;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 14px;
  transition: var(--transition);
  font-family: inherit;
}

.form-input:focus, .form-select:focus, .form-textarea:focus {
  outline: none;
  border-color: var(--accent-blue);
  box-shadow: 0 0 0 3px rgba(59,130,246,0.2);
}

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

.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-row-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 16px; }

.form-switch {
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
}

.switch-track {
  width: 44px; height: 24px;
  background: var(--border-color);
  border-radius: 12px;
  position: relative;
  transition: var(--transition);
}

.switch-track.active { background: var(--accent-blue); }

.switch-track::after {
  content: '';
  position: absolute;
  width: 18px; height: 18px;
  background: white;
  border-radius: 50%;
  top: 3px; left: 3px;
  transition: var(--transition);
}

.switch-track.active::after { left: 23px; }

/* ─── Badges ─── */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 10px;
  border-radius: 20px;
  font-size: 11px;
  font-weight: 600;
}

.badge-online { background: rgba(34,197,94,0.15); color: var(--accent-green); }
.badge-offline { background: rgba(239,68,68,0.15); color: var(--accent-red); }
.badge-warning { background: rgba(245,158,11,0.15); color: var(--accent-yellow); }
.badge-info { background: rgba(59,130,246,0.15); color: var(--accent-blue); }
.badge-critical { background: rgba(239,68,68,0.2); color: var(--accent-red); }

/* ─── Modal ─── */
.modal-overlay {
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 100%;
  background: rgba(0,0,0,0.6);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease;
}

.modal-overlay.active { opacity: 1; pointer-events: auto; }

.modal {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  width: 90%;
  max-width: 640px;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow);
}

.modal-header {
  padding: 20px 24px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-header h3 { font-size: 18px; }
.modal-body { padding: 24px; }
.modal-footer {
  padding: 16px 24px;
  border-top: 1px solid var(--border-color);
  display: flex;
  justify-content: flex-end;
  gap: 8px;
}

.modal-close {
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 22px;
  cursor: pointer;
  padding: 4px;
  line-height: 1;
}

/* ─── Log Viewer ─── */
.log-entry {
  display: flex;
  gap: 12px;
  padding: 10px 0;
  border-bottom: 1px solid var(--border-color);
  font-size: 13px;
}

.log-time {
  color: var(--text-muted);
  white-space: nowrap;
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  min-width: 140px;
}

.log-level {
  padding: 1px 6px;
  border-radius: 4px;
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  min-width: 60px;
  text-align: center;
}

.log-level.info { background: rgba(59,130,246,0.15); color: var(--accent-blue); }
.log-level.warning { background: rgba(245,158,11,0.15); color: var(--accent-yellow); }
.log-level.error { background: rgba(239,68,68,0.15); color: var(--accent-red); }
.log-level.critical { background: rgba(239,68,68,0.3); color: var(--accent-red); }
.log-level.debug { background: rgba(168,85,247,0.15); color: var(--accent-purple); }

.log-message { color: var(--text-primary); flex: 1; }
.log-camera { color: var(--accent-cyan); font-weight: 500; min-width: 100px; }

/* ─── Image Gallery ─── */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 16px;
}

.gallery-item {
  border-radius: var(--radius-sm);
  overflow: hidden;
  border: 1px solid var(--border-color);
  cursor: pointer;
  transition: var(--transition);
}

.gallery-item:hover { border-color: var(--accent-blue); transform: translateY(-2px); }

.gallery-item img {
  width: 100%;
  height: 150px;
  object-fit: cover;
}

.gallery-meta {
  padding: 10px;
  background: var(--bg-card);
  font-size: 11px;
  color: var(--text-secondary);
}

/* ─── Connection Test ─── */
.test-result {
  padding: 16px;
  border-radius: var(--radius-sm);
  margin-top: 12px;
}

.test-result.success { background: rgba(34,197,94,0.1); border: 1px solid rgba(34,197,94,0.3); }
.test-result.fail { background: rgba(239,68,68,0.1); border: 1px solid rgba(239,68,68,0.3); }

/* ─── PTZ Controls ─── */
.ptz-controls {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}

.ptz-row { display: flex; gap: 4px; }

.ptz-btn {
  width: 48px; height: 48px;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 18px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}

.ptz-btn:hover { background: var(--accent-blue); }
.ptz-btn:active { transform: scale(0.95); }

.zoom-controls { display: flex; gap: 8px; margin-top: 12px; }

/* ─── Toast Notification ─── */
.toast-container {
  position: fixed;
  top: 16px;
  right: 16px;
  z-index: 2000;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.toast {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 12px 20px;
  box-shadow: var(--shadow);
  display: flex;
  align-items: center;
  gap: 10px;
  animation: slideIn 0.3s ease;
  min-width: 280px;
}

.toast.success { border-left: 4px solid var(--accent-green); }
.toast.error { border-left: 4px solid var(--accent-red); }
.toast.warning { border-left: 4px solid var(--accent-yellow); }
.toast.info { border-left: 4px solid var(--accent-blue); }

@keyframes slideIn {
  from { transform: translateX(100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

/* ─── Loading ─── */
.spinner {
  width: 24px; height: 24px;
  border: 3px solid var(--border-color);
  border-top-color: var(--accent-blue);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  display: inline-block;
}

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

.loading-overlay {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 60px;
  gap: 12px;
  color: var(--text-secondary);
}

/* ─── Empty State ─── */
.empty-state {
  text-align: center;
  padding: 60px 20px;
  color: var(--text-muted);
}

.empty-state .icon { font-size: 48px; margin-bottom: 16px; }
.empty-state h3 { color: var(--text-secondary); margin-bottom: 8px; }

/* ─── Responsive ─── */
@media (max-width: 768px) {
  .sidebar { transform: translateX(-100%); }
  .sidebar.open { transform: translateX(0); }
  .main-content { margin-left: 0; }
  .form-row, .form-row-3 { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
}

/* ─── Scrollbar ─── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-primary); }
::-webkit-scrollbar-thumb { background: var(--border-color); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }

/* ─── Page sections ─── */
.page { display: none; }
.page.active { display: block; }

/* ─── Snapshot preview ─── */
.snapshot-frame {
  width: 100%;
  max-height: 400px;
  object-fit: contain;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
  background: #000;
}

/* ─── Grid Layouts ─── */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.grid-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 16px; }

@media (max-width: 900px) {
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
}

/* ─── Push Device Status ─── */
.status-dot {
  display: inline-block;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  margin-right: 4px;
}
.status-dot.online {
  background: #27ae60;
  box-shadow: 0 0 6px #27ae6088;
  animation: pulse-green 2s infinite;
}
.status-dot.offline {
  background: #e74c3c;
}
@keyframes pulse-green {
  0%, 100% { box-shadow: 0 0 4px #27ae6088; }
  50% { box-shadow: 0 0 12px #27ae60cc; }
}

.push-badge {
  background: var(--accent) !important;
}

code {
  background: rgba(255,255,255,0.08);
  padding: 2px 6px;
  border-radius: 3px;
  font-size: 0.85em;
  color: var(--accent);
}

.badge-danger { background: #e74c3c; }
.badge-warning { background: #f39c12; }
.badge-success { background: #27ae60; }
.badge-info { background: var(--accent); }

.btn-sm {
  padding: 4px 8px;
  font-size: 0.8rem;
}
.btn-danger {
  background: #e74c3c;
  color: white;
}
.btn-danger:hover {
  background: #c0392b;
}

/* ─── Live Stream Grid ─── */
.stream-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.stream-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
}

.stream-header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  background: rgba(0,0,0,0.3);
  border-bottom: 1px solid var(--border);
}

.stream-video-container {
  position: relative;
  width: 100%;
  background: #000;
  aspect-ratio: 16/9;
}

.stream-video {
  width: 100%;
  height: 100%;
  object-fit: contain;
  background: #000;
}

.stream-info {
  padding: 8px 14px;
  font-size: 0.8rem;
  color: var(--text-muted);
  border-top: 1px solid var(--border);
}

@media (max-width: 900px) {
  .stream-grid { grid-template-columns: 1fr; }
}