/* ===========================================================================
   PB.baum: generischer Verzeichnisbaum-Baustein (public/js/kern/baum.js).
   Optik bewusst eng am SOP-Baum (sop.css) gehalten, aber eigene Klassen --
   kein Modul soll dafür sop.css laden müssen. Farben über die Design-Tokens
   aus app.css (Hell/Dunkel automatisch).
   =========================================================================== */

.pb-baum { display: flex; flex-direction: column; }
.pb-baum__kopf { padding: 4px 4px 8px; }
.pb-baum__leer { padding: 8px 4px; font-size: 13px; }

.pb-baum__node { display: flex; flex-direction: column; }
.pb-baum__children { margin-left: 9px; border-left: 1px dashed var(--border); padding-left: 5px; }

.pb-baum__row {
  display: flex; align-items: center; gap: 2px;
  border-radius: var(--radius-sm); min-width: 0;
}
.pb-baum__row:hover { background: var(--surface); }
.pb-baum__row.is-active { background: var(--surface); box-shadow: var(--shadow-sm); }
.pb-baum__row.is-active .pb-baum__label { font-weight: 600; }
.pb-baum__row--dragover { outline: 2px dashed var(--accent); outline-offset: -2px; }
.pb-baum__row--drop-before { box-shadow: inset 0 2px 0 var(--accent); }
.pb-baum__row--drop-after { box-shadow: inset 0 -2px 0 var(--accent); }

.pb-baum__toggle {
  flex: none; width: 20px; height: 26px; padding: 0;
  display: flex; align-items: center; justify-content: center;
  appearance: none; background: transparent; border: 0; color: var(--text-faint); cursor: pointer;
}
.pb-baum__toggle svg { transition: transform .12s ease; }
.pb-baum__toggle.is-open svg { transform: rotate(90deg); }

.pb-baum__label {
  flex: 1; min-width: 0; display: flex; align-items: center; gap: 7px;
  appearance: none; background: transparent; border: 0; color: inherit; font: inherit;
  text-align: left; cursor: pointer; padding: 5px 4px; border-radius: var(--radius-sm);
}
.pb-baum__icon { flex: none; display: flex; width: 15px; height: 15px; color: var(--text-faint); }
.pb-baum__icon svg { width: 100%; height: 100%; }
.pb-baum__titel { font-size: 13.5px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

.pb-baum__actions { flex: none; display: flex; gap: 1px; opacity: 0; }
.pb-baum__row:hover .pb-baum__actions, .pb-baum__row:focus-within .pb-baum__actions { opacity: 1; }
/* Geraete ohne Mauszeiger (Tablet, auch im Querformat): dort gibt es kein
   :hover -- die Zeilen-Aktionen waeren sonst unsichtbar und nur durch
   zufaelliges Antippen zu finden (Code-Review 24.08.2026). */
@media (hover: none) {
  .pb-baum__actions { opacity: 1; }
}
.pb-baum__btn {
  appearance: none; border: 0; background: transparent; color: var(--text-faint); cursor: pointer;
  width: 24px; height: 24px; border-radius: var(--radius-sm); font-size: 13px;
  display: flex; align-items: center; justify-content: center;
}
.pb-baum__btn:hover { background: var(--surface-2); color: var(--text); }
.pb-baum__btn--danger:hover { color: var(--danger, #c0392b); }

@media (max-width: 640px) {
  .pb-baum__actions { opacity: 1; }
  .pb-baum__toggle { width: 40px; height: 40px; }
  .pb-baum__btn { width: 40px; height: 40px; }
}