/* ============================================================
   Catalog — view switcher toolbar + tree view
   ============================================================ */
.cat-toolbar {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: var(--gap);
}
.cat-view { display: inline-flex; align-items: center; gap: 8px; }
.cat-view-label {
  font-size: 12px;
  color: var(--ink-faint);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.seg-view button,
.seg-view a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  font-weight: 500;
}
.seg-view svg { width: 14px; height: 14px; opacity: 0.85; }
.seg-view .active svg { opacity: 1; color: var(--accent-ink); }

/* ---- tree summary bar ---- */
.tree-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 6px;
}
.tree-bar-count { font-size: 12.5px; color: var(--ink-mute); }
.tree-bar-actions { display: inline-flex; align-items: center; gap: 8px; }
.tree-link {
  border: none;
  background: none;
  padding: 0;
  font: inherit;
  font-size: 12.5px;
  color: var(--accent-ink);
  cursor: pointer;
}
.tree-link:hover { text-decoration: underline; }

/* ---- tree container ---- */
.tree {
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  box-shadow: var(--shadow-sm);
  padding: 6px;
}
.tree-node { position: relative; }

/* nested indentation + guide line */
.tree-children {
  margin-left: 27px;
  padding-left: 13px;
  border-left: 1px solid var(--line);
}
.tree-folder.collapsed > .tree-children { display: none; }

/* rows */
.tree-row {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 7px 10px;
  border-radius: var(--r-sm);
  min-height: 40px;
}
.tree-row-folder { cursor: pointer; }
.tree-leaf { position: relative; }
.tree-row:hover { background: var(--bg-soft); }

/* the whole item row is clickable (opens the card); drag starts on press-and-move */
.tree-row-item { cursor: pointer; }
.tree-name-link { text-decoration: none; color: inherit; }
.tree-row-item:hover .tree-name-link { text-decoration: underline; }

/* drag-and-drop affordances */
.tree-node.tree-dragging { opacity: 0.45; }
.tree-folder.tree-drop-target > .tree-row-folder {
  background: var(--accent-soft);
  box-shadow: inset 0 0 0 1px var(--accent-line);
}
.tree.tree-drop-root {
  box-shadow: inset 0 0 0 2px var(--accent-line), var(--shadow-sm);
}

/* item leaf: whole row is a link, action menu stays clickable above it */
.tree-row-link {
  position: absolute;
  inset: 0;
  z-index: 1;
}
.tree-leaf .menu-trigger { position: relative; z-index: 2; }

/* twist / chevron */
.tree-twist {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  color: var(--ink-faint);
  transition: transform 0.15s ease;
}
.tree-twist svg { width: 14px; height: 14px; }
.tree-folder:not(.collapsed) > .tree-row-folder .tree-twist { transform: rotate(90deg); }
.tree-twist-empty { visibility: hidden; }

/* icon chips */
.tree-ic {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: var(--r-xs);
  flex-shrink: 0;
}
.tree-ic svg { width: 16px; height: 16px; }
.tree-ic.folder { background: var(--accent-soft); color: var(--accent-ink); }
.tree-ic.box    { background: var(--info-soft);   color: var(--info); }

.tree-name {
  font-size: 14px;
  color: var(--ink);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.tree-row-folder .tree-name { font-weight: 600; }

.tree-badge {
  font-size: 11.5px;
  font-weight: 500;
  color: var(--ink-mute);
  background: var(--bg-sunken);
  border-radius: var(--r-pill);
  padding: 1px 8px;
  flex-shrink: 0;
}
.tree-sub {
  font-size: 12px;
  color: var(--ink-faint);
  white-space: nowrap;
}
.tree-grow { flex: 1; }
.tree-row .tag,
.tree-row .pill { white-space: nowrap; flex-shrink: 0; }
.tree-row .menu-trigger,
.tree-row .tree-badge { flex-shrink: 0; }
.tree-qty {
  font-size: 13px;
  font-weight: 600;
  color: var(--ink);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
  flex-shrink: 0;
}
.tree-qty .dim { font-size: 11px; font-weight: 500; }

/* keep the action menu visible only on row hover (desktop) */
.tree-row .menu-trigger { flex-shrink: 0; }
@media (hover: hover) {
  .tree-row .menu-trigger { opacity: 0; transition: opacity 0.12s ease; }
  .tree-row:hover .menu-trigger,
  .tree-row .menu-trigger:has(.action-menu.open) { opacity: 1; }
}

.tree-empty {
  padding: 40px 20px;
  text-align: center;
  color: var(--ink-mute);
}

@media (max-width: 640px) {
  .tree-sub { display: none; }
  .tree-children { margin-left: 16px; padding-left: 10px; }
}