/* ==========================================================================
   DAHUA NVR CAMERA MONITORING SYSTEM - CLEAN DARK CCTV CONSOLE
   ========================================================================== */

:root {
  /* Dark Modern Palette */
  --bg-dark: #0b0c10;
  --bg-panel: #12141c;
  --bg-element: #1a1d28;
  --bg-hover: #222636;
  
  /* Borders */
  --border-subtle: #1f2330;
  --border-strong: #2a2f40;
  --border-active: #0A84FF;

  /* Primary & Accent Colors */
  --primary: #0A84FF;
  --primary-glow: rgba(10, 132, 255, 0.25);
  --accent-cyan: #32ADE6;
  --accent-emerald: #34C759;
  --accent-amber: #FF9F0A;
  --accent-rose: #FF3B30;

  /* Text Colors */
  --text-main: #f0f2f5;
  --text-muted: #9499ab;
  --text-dim: #656a7b;

  /* Layout & Spacing */
  --header-height: 64px;
  --sidebar-width: 320px;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-pill: 9999px;
  --transition: all 0.2s cubic-bezier(0.25, 1, 0.5, 1);
}

/* Reset & Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  background: var(--bg-dark);
  color: var(--text-main);
  min-height: 100vh;
  overflow: hidden;
  position: relative;
}

/* Mesh Gradient Background - Disabled */
.mesh-bg {
  display: none;
}

/* App Container Layout */
#app {
  display: flex;
  flex-direction: column;
  height: 100vh;
  width: 100vw;
  background: var(--bg-dark);
}

/* ==========================================================================
   HEADER SECTION
   ========================================================================== */
.main-header {
  height: var(--header-height);
  background: var(--bg-panel);
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
  z-index: 100;
}

.brand-title {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-logo {
  width: 36px;
  height: 36px;
  border-radius: 8px; 
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.brand-logo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.brand-info h1 {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-main);
}

.branch-dropdown {
  background: var(--bg-element);
  color: var(--text-main);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  font-size: 1rem;
  font-weight: 600;
  outline: none;
  cursor: pointer;
  padding: 8px 32px 8px 16px;
  appearance: none;
  -webkit-appearance: none;
  background-image: url("data:image/svg+xml;charset=US-ASCII,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20width%3D%22292.4%22%20height%3D%22292.4%22%3E%3Cpath%20fill%3D%22%23f0f2f5%22%20d%3D%22M287%2069.4a17.6%2017.6%200%200%200-13-5.4H18.4c-5%200-9.3%201.8-12.9%205.4A17.6%2017.6%200%200%200%200%2082.2c0%205%201.8%209.3%205.4%2012.9l128%20127.9c3.6%203.6%207.8%205.4%2012.8%205.4s9.2-1.8%2012.8-5.4L287%2095c3.5-3.5%205.4-7.8%205.4-12.8%200-5-1.9-9.2-5.5-12.8z%22%2F%3E%3C%2Fsvg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  background-size: 10px auto;
}

.branch-dropdown option {
  background: var(--bg-panel);
  color: var(--text-main);
}

/* Status Badges */
.status-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: var(--radius-pill);
  font-size: 0.75rem;
  font-weight: 600;
  background: rgba(52, 199, 89, 0.15);
  color: var(--accent-emerald);
  border: 1px solid rgba(52, 199, 89, 0.2);
}

.status-pill.offline {
  background: rgba(255, 59, 48, 0.15);
  color: var(--accent-rose);
  border-color: rgba(255, 59, 48, 0.2);
}

.pulse-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--accent-emerald);
  box-shadow: 0 0 8px var(--accent-emerald);
  animation: pulse 2s infinite;
}

.status-pill.offline .pulse-dot {
  background-color: var(--accent-rose);
  box-shadow: 0 0 8px var(--accent-rose);
  animation: none;
}

@keyframes pulse {
  0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(52, 199, 89, 0.7); }
  70% { transform: scale(1); box-shadow: 0 0 0 4px rgba(52, 199, 89, 0); }
  100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(52, 199, 89, 0); }
}

/* Header Controls & Grid Switcher */
.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.grid-switcher {
  display: flex;
  background: var(--bg-element);
  padding: 3px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-subtle);
}

.grid-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  padding: 6px 12px;
  border-radius: 6px;
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
}

.grid-btn:hover {
  color: var(--text-main);
  background: rgba(255, 255, 255, 0.05);
}

.grid-btn.active {
  background: var(--primary);
  color: #ffffff;
}

.icon-btn {
  background: var(--bg-element);
  border: 1px solid var(--border-strong);
  color: var(--text-main);
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition);
}

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

/* ==========================================================================
   MAIN CONTENT LAYOUT (SIDEBAR + STREAMING GRID)
   ========================================================================== */
.main-content {
  display: flex;
  flex: 1;
  overflow: hidden;
  padding: 12px;
  gap: 12px;
}

/* Sidebar Camera Directory */
.sidebar {
  width: var(--sidebar-width);
  background: var(--bg-panel);
  border: 1px solid var(--border-subtle);
  border-top: 3px solid var(--primary);
  border-radius: var(--radius-md);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  z-index: 50;
}

.sidebar-header {
  padding: 14px;
  border-bottom: 1px solid var(--border-subtle);
}

.search-box {
  position: relative;
}

.search-box input {
  width: 100%;
  background: var(--bg-element);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  padding: 8px 12px 8px 34px;
  color: var(--text-main);
  font-size: 0.85rem;
  outline: none;
  transition: var(--transition);
}

.search-box input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 2px var(--primary-glow);
}

.search-box svg {
  position: absolute;
  left: 10px;
  top: 50%;
  transform: translateY(-50%);
  width: 15px;
  height: 15px;
  fill: var(--text-muted);
}

/* Camera List */
.camera-list {
  flex: 1;
  overflow-y: auto;
  padding: 10px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.camera-list::-webkit-scrollbar {
  width: 4px;
}
.camera-list::-webkit-scrollbar-thumb {
  background: var(--border-strong);
  border-radius: 4px;
}

.camera-item {
  background: var(--bg-element);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  transition: var(--transition);
}

.camera-item:hover {
  background: var(--bg-hover);
  border-color: var(--border-strong);
}

.camera-item.active {
  background: var(--primary-glow);
  border-color: var(--primary);
}

.camera-item-info {
  display: flex;
  align-items: center;
  gap: 10px;
}

.cam-badge {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-muted);
  font-size: 0.75rem;
  padding: 2px 6px;
  border-radius: 4px;
}

.cam-name {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-main);
}

/* ==========================================================================
   VIDEO GRID VIEWPORT
   ========================================================================== */
.viewport {
  flex: 1;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  border-radius: var(--radius-md);
}

.viewport::-webkit-scrollbar {
  display: none;
}

.grid-container {
  display: grid;
  gap: 10px;
  width: 100%;
  height: 100%;
}

.grid-container.grid-1x1 { grid-template-columns: 1fr; }
.grid-container.grid-2x2 { grid-template-columns: repeat(2, 1fr); }
.grid-container.grid-3x3 { grid-template-columns: repeat(3, 1fr); }
.grid-container.grid-4x4 { grid-template-columns: repeat(4, 1fr); }

/* Camera Video Tile Card */
.video-tile {
  background: #000000;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: var(--transition);
}

.video-tile:hover {
  border-color: var(--border-strong);
}

.video-header {
  padding: 8px 12px;
  background: rgba(0, 0, 0, 0.6);
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  z-index: 10;
  backdrop-filter: blur(4px);
}

.video-title {
  display: flex;
  align-items: center;
  gap: 6px;
}

.video-title span:last-child {
  font-size: 0.8rem;
  font-weight: 600;
  color: #ffffff;
}

.video-icon {
  font-size: 0.6rem;
}

.video-actions {
  display: flex;
  align-items: center;
  gap: 6px;
  opacity: 0;
  transition: var(--transition);
}

.video-tile:hover .video-actions {
  opacity: 1;
}

.video-actions button {
  background: rgba(255, 255, 255, 0.2);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: #ffffff;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition);
}

.video-actions button:hover {
  background: rgba(255, 255, 255, 0.4);
}

.video-container {
  flex: 1;
  position: relative;
  background: #000;
  display: flex;
  align-items: center;
  justify-content: center;
}

.video-container iframe {
  border-radius: 0;
}

.video-overlay-status {
  position: absolute;
  bottom: 8px;
  left: 8px;
  background: rgba(0, 0, 0, 0.7);
  padding: 4px 8px;
  border-radius: var(--radius-pill);
  font-size: 0.7rem;
  font-weight: 500;
  color: #ffffff;
  border: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  align-items: center;
  gap: 6px;
  z-index: 10;
}

/* ==========================================================================
   SETTINGS MODAL
   ========================================================================== */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(0, 0, 0, 0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  opacity: 0;
  pointer-events: none;
  transition: var(--transition);
}

.modal-overlay.open, .modal-overlay.show {
  opacity: 1;
  pointer-events: auto;
}

.modal-container {
  background: var(--bg-panel);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-md);
  width: 90%;
  max-width: 520px;
  overflow: hidden;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
  transform: scale(0.95);
  transition: all 0.2s ease;
}

.modal-overlay.open .modal-container, .modal-overlay.show .modal-container {
  transform: scale(1);
}

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

.modal-header h2 {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-main);
}

.modal-body {
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  max-height: 70vh;
  overflow-y: auto;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-group label {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-muted);
}

.form-group input, .form-group select {
  background: var(--bg-element);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  color: var(--text-main);
  font-size: 0.9rem;
  outline: none;
  transition: var(--transition);
}

.form-group input:focus, .form-group select:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 2px var(--primary-glow);
}

.modal-footer {
  padding: 14px 20px;
  background: var(--bg-element);
  border-top: 1px solid var(--border-subtle);
  display: flex;
  justify-content: flex-end;
  gap: 10px;
}

/* General Buttons */
.btn {
  padding: 8px 18px;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  border: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.btn-primary {
  background: var(--primary);
  color: #fff;
}

.btn-primary:hover {
  background: #3194ff;
}

.btn-secondary {
  background: var(--bg-element);
  color: var(--text-main);
  border: 1px solid var(--border-strong);
}

.btn-secondary:hover {
  background: var(--bg-hover);
}

/* iOS Style Toggle Switch */
.toggle-switch {
  position: relative;
  width: 40px;
  height: 22px;
  background: var(--bg-element);
  border-radius: 22px;
  cursor: pointer;
  transition: all 0.3s ease;
  border: 1px solid var(--border-strong);
  flex-shrink: 0;
}

.toggle-switch.active {
  background: var(--accent-emerald);
  border-color: var(--accent-emerald);
}

.toggle-switch::after {
  content: '';
  position: absolute;
  top: 2px;
  left: 2px;
  width: 16px;
  height: 16px;
  background: #ffffff;
  border-radius: 50%;
  transition: all 0.3s ease;
}

.toggle-switch.active::after {
  transform: translateX(18px);
}