/* ---- Layout ---- */
    .layout {
      display: flex;
      flex: 1;
      overflow: hidden;
    }

    /* ---- Sidebar ---- */
    .sidebar {
      width: 210px;
      min-width: 210px;
      background: linear-gradient(180deg, var(--bg-sidebar) 0%, #0c1018 100%);
      border-right: 1px solid var(--border-subtle);
      display: flex;
      flex-direction: column;
      min-height: 0;
      overflow: hidden;
      transition: width var(--transition-ui), min-width var(--transition-ui), border-color var(--transition-ui);
    }

    .layout.sidebar-collapsed .sidebar {
      width: 52px;
      min-width: 52px;
    }

    .sidebar-collapse-btn {
      flex-shrink: 0;
      width: 36px;
      height: 36px;
      padding: 0;
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      background: var(--bg-card);
      color: var(--text);
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.04);
      transition: border-color var(--transition-fast), color var(--transition-fast), background var(--transition-fast), box-shadow var(--transition-fast), transform 0.1s;
    }

    .sidebar-collapse-btn:hover {
      border-color: var(--border-strong);
      color: #fff;
      background: var(--bg-card-elevated);
      box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.06), 0 2px 8px rgba(0, 0, 0, 0.2);
    }

    .sidebar-collapse-btn:active {
      transform: scale(0.96);
    }

    .sidebar-collapse-btn:focus-visible {
      outline: none;
      box-shadow: var(--focus-ring);
    }

    .sidebar-collapse-ico {
      width: 18px;
      height: 18px;
      display: block;
      opacity: 0.92;
    }

    .sidebar-collapse-ico-restore {
      display: none;
    }

    .layout.sidebar-collapsed .sidebar-collapse-ico-restore {
      display: block;
    }

    .layout.sidebar-collapsed .sidebar-collapse-ico-narrow {
      display: none;
    }

    #cam-list {
      flex: 1;
      min-height: 0;
      overflow-y: auto;
    }

    .sidebar-footer {
      flex-shrink: 0;
      padding: 8px 10px 10px;
      border-top: 1px solid var(--border-subtle);
      background: linear-gradient(180deg, transparent, rgba(0, 0, 0, 0.18));
      position: relative;
    }

    /* Browser download progress — stacked above Help in sidebar footer */
    .browser-download-panel {
      display: none;
      margin-bottom: 8px;
      padding: 8px 9px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-subtle);
      background: rgba(14, 18, 28, 0.96);
      box-shadow: 0 4px 14px rgba(0, 0, 0, 0.28);
      z-index: 20;
    }

    .browser-download-panel.visible {
      display: block;
    }

    .browser-download-panel-inner {
      display: flex;
      flex-direction: column;
      align-items: stretch;
      gap: 6px;
    }

    .browser-download-panel-text {
      min-width: 0;
    }

    .browser-download-panel-title {
      font-size: 10px;
      font-weight: 600;
      color: var(--text);
      margin-bottom: 2px;
      line-height: 1.25;
    }

    .browser-download-panel-sub {
      font-size: 9px;
      color: var(--text-dim);
      line-height: 1.3;
    }

    .browser-download-panel-track {
      width: 100%;
      height: 7px;
      border-radius: 999px;
      background: rgba(0, 0, 0, 0.35);
      box-shadow: inset 0 1px 2px rgba(0, 0, 0, 0.35);
      overflow: hidden;
      position: relative;
    }

    .browser-download-panel-fill {
      height: 100%;
      width: 0%;
      border-radius: 999px;
      background: linear-gradient(90deg, #1a9a82 0%, var(--accent) 50%, #12c9a0 100%);
      transition: width 0.2s ease-out;
    }

    .browser-download-panel-fill.indeterminate {
      position: absolute;
      left: 0;
      top: 0;
      width: 38%;
      animation: browser-download-indeterminate 1.35s ease-in-out infinite;
    }

    @keyframes browser-download-indeterminate {
      0% { transform: translateX(-105%); }
      100% { transform: translateX(320%); }
    }

    .layout.sidebar-collapsed .browser-download-panel-text {
      display: none;
    }

    .layout.sidebar-collapsed .browser-download-panel {
      margin-bottom: 6px;
      padding: 6px;
    }

    .sidebar-info-btn {
      display: inline-flex;
      align-items: center;
      justify-content: flex-start;
      gap: 7px;
      width: 100%;
      padding: 7px 9px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-subtle);
      background: var(--bg-toolbar);
      color: var(--text-dim);
      font-size: 10px;
      font-weight: 500;
      font-family: inherit;
      line-height: 1.2;
      cursor: pointer;
      transition: color var(--transition-fast), border-color var(--transition-fast), background var(--transition-fast), box-shadow var(--transition-fast);
    }

    .sidebar-info-btn:hover {
      color: var(--text);
      border-color: var(--border-strong);
      background: rgba(255, 255, 255, 0.04);
      box-shadow: none;
    }

    .sidebar-info-btn:focus-visible {
      outline: none;
      box-shadow: var(--focus-ring);
    }

    .sidebar-info-icon {
      width: 18px;
      height: 18px;
      border-radius: 50%;
      background: rgba(255, 255, 255, 0.06);
      color: var(--text-dim);
      display: flex;
      align-items: center;
      justify-content: center;
      flex-shrink: 0;
    }

    .sidebar-info-icon svg {
      width: 12px;
      height: 12px;
      display: block;
    }

    .sidebar-header {
      padding: 8px 10px 6px 11px;
      font-size: 11px;
      font-weight: 600;
      color: var(--text-muted);
      text-transform: uppercase;
      letter-spacing: 0.06em;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 8px;
    }

    .sidebar-header-main {
      flex: 1;
      min-width: 0;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 6px;
    }

    .layout.sidebar-collapsed .sidebar-header {
      justify-content: center;
      padding: 10px 6px 8px;
    }

    .layout.sidebar-collapsed .sidebar-header-main {
      display: none;
    }

    .layout.sidebar-collapsed .site-group {
      display: none;
    }

    .layout.sidebar-collapsed .cam-status-btn,
    .layout.sidebar-collapsed .cam-label {
      display: none;
    }

    .layout.sidebar-collapsed .cam-item {
      padding: 9px 8px;
      justify-content: center;
      gap: 0;
    }

    .layout.sidebar-collapsed .cam-item.selected {
      padding-left: 5px;
    }

    .layout.sidebar-collapsed .sidebar-info-text {
      display: none;
    }

    .layout.sidebar-collapsed .sidebar-info-btn {
      justify-content: center;
      padding: 8px 6px;
    }

    .layout.sidebar-collapsed .sidebar-footer {
      padding: 8px 6px 10px;
    }

    .sidebar-header #cam-count {
      background: rgba(255, 255, 255, 0.06);
      color: var(--text-dim);
      padding: 1px 6px;
      border-radius: var(--radius-sm);
      font-size: var(--font-caption);
      font-weight: 600;
      font-variant-numeric: tabular-nums;
      border: 1px solid var(--border-subtle);
    }

    .site-group {
      padding: 3px 12px 5px;
      font-size: 11px;
      color: var(--text-muted);
      display: flex;
      align-items: center;
      gap: 6px;
    }

    .site-icon {
      width: 14px;
      height: 14px;
      border-radius: 3px;
      background: rgba(255, 255, 255, 0.06);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 9px;
      color: var(--text-muted);
    }

    .cam-item {
      display: flex;
      align-items: center;
      gap: 7px;
      padding: 7px 12px 7px 26px;
      cursor: pointer;
      transition: background var(--transition-fast);
      font-size: 12px;
      position: relative;
    }

    .cam-item:hover {
      background: rgba(255, 255, 255, 0.035);
    }

    .cam-item.selected {
      background: rgba(255, 255, 255, 0.05);
      border-left: 2px solid rgba(255, 255, 255, 0.22);
      padding-left: 24px;
    }

    .cam-dot {
      width: 7px;
      height: 7px;
      border-radius: 50%;
      background: var(--status-online);
      flex-shrink: 0;
      box-shadow: 0 0 6px rgba(52, 209, 122, 0.45);
    }

    .cam-dot.offline {
      background: var(--status-offline);
      box-shadow: 0 0 6px rgba(240, 82, 82, 0.4);
    }

    .cam-status-btn {
      flex-shrink: 0;
      border: 1px solid transparent;
      font-size: var(--font-caption);
      font-weight: 600;
      letter-spacing: 0.04em;
      text-transform: uppercase;
      padding: 2px 6px;
      border-radius: var(--radius-sm);
      cursor: default;
      font-family: inherit;
      line-height: 1.2;
      transition: opacity var(--transition-fast);
    }

    .cam-status-btn.online {
      background: var(--status-online-dim);
      color: var(--status-online);
      border-color: var(--status-online-border);
    }

    .cam-status-btn.offline {
      background: var(--status-offline-dim);
      color: var(--status-offline);
      border-color: var(--status-offline-border);
    }

    .cam-label {
      overflow: hidden;
      text-overflow: ellipsis;
      white-space: nowrap;
      min-width: 0;
      flex: 1;
    }

    /* ---- Main View ---- */
    .main-view {
      flex: 1;
      display: flex;
      flex-direction: column;
      background: linear-gradient(180deg, #060810 0%, #04060c 100%);
      position: relative;
      min-height: 0;
    }