/**
 * LibZen PanelManager — header popup tree for panel visibility.
 */

:root {
  --libzen-pm-panel: var(--panel, #1a2332);
  --libzen-pm-text: var(--text, #e2e8f0);
  --libzen-pm-muted: var(--text-muted, #94a3b8);
  --libzen-pm-border: var(--border, #2d3a4f);
  --libzen-pm-accent: var(--accent, #3b82f6);
  --libzen-pm-hover: rgba(255, 255, 255, 0.06);
}

.libzen-pm-panel {
  position: fixed;
  z-index: 2147482000;
  width: min(22rem, calc(100vw - 16px));
  max-height: min(24rem, calc(100vh - 16px));
  display: flex;
  flex-direction: column;
  background: var(--libzen-pm-panel);
  color: var(--libzen-pm-text);
  border: 1px solid var(--libzen-pm-border);
  border-radius: 10px;
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.45);
  font-family: system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  font-size: 13px;
  overflow: hidden;
}

.libzen-pm-panel[hidden] {
  display: none;
}

.libzen-pm-head {
  padding: 10px 12px 8px;
  border-bottom: 1px solid var(--libzen-pm-border);
  flex-shrink: 0;
}

.libzen-pm-title {
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--libzen-pm-muted);
}

.libzen-pm-tree {
  overflow-y: auto;
  padding: 6px 0;
}

.libzen-pm-empty {
  margin: 0;
  padding: 12px 14px;
  font-size: 12px;
  color: var(--libzen-pm-muted);
}

.libzen-pm-row {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 4px 10px 4px calc(10px + var(--libzen-pm-depth, 0) * 14px);
  min-height: 30px;
}

.libzen-pm-check {
  flex-shrink: 0;
  width: 14px;
  height: 14px;
  margin: 0;
  accent-color: var(--libzen-pm-accent);
  cursor: pointer;
}

.libzen-pm-check-spacer {
  flex-shrink: 0;
  width: 14px;
  height: 14px;
}

.libzen-pm-label {
  flex: 1;
  min-width: 0;
  padding: 4px 6px;
  border: none;
  border-radius: 6px;
  background: transparent;
  color: inherit;
  font: inherit;
  text-align: left;
  cursor: pointer;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.libzen-pm-label:hover {
  background: var(--libzen-pm-hover);
}

.libzen-pm-label-hidden {
  color: var(--libzen-pm-muted);
  opacity: 0.75;
}

.libzen-pm-trigger {
  /* Uses .libzen-hd-glyph from header.css when placed in header */
}

.libzen-pm-trigger .libzen-pn-panel-drag-handle {
  cursor: inherit;
  padding: 0;
}