/* ── Folder tree sidebar ── */
.tree-sidebar {
  width: 220px;
  flex-shrink: 0;
  background: var(--bg-el);
  border-right: 1px solid var(--border);
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--border-h) transparent;
  transition: width 260ms cubic-bezier(0.4,0,0.2,1);
}
.tree-sidebar::-webkit-scrollbar { width: 4px; }
.tree-sidebar::-webkit-scrollbar-thumb { background: var(--border-h); border-radius: 2px; }
.tree-sidebar.hidden { width: 0; overflow: hidden; border-right-color: transparent; }

#tree-root { padding: 8px 0; }

.tree-node { position: relative; }

.tree-row {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 4px 8px;
  min-height: 28px;
}
.tree-row:hover { background: var(--border); }

.tree-toggle {
  background: none;
  border: none;
  color: var(--text-3);
  cursor: pointer;
  font-size: 0.7rem;
  width: 16px;
  flex-shrink: 0;
  padding: 0;
  line-height: 1;
  transition: color var(--t);
}
.tree-toggle:hover { color: var(--text-1); }
.tree-toggle-spacer { width: 16px; flex-shrink: 0; }

.tree-link {
  color: var(--text-2);
  text-decoration: none;
  font-size: 0.8rem;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  flex: 1;
  transition: color var(--t);
  font-family: 'JetBrains Mono', monospace;
}
.tree-link:hover { color: var(--accent); }

.tree-children { padding-left: 0; }
.tree-children.hidden { display: none; }

/* ── Bulk-select action bar (floats at bottom) ── */
.select-action-bar {
  position: fixed;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--bg-el);
  border: 1px solid var(--border-h);
  border-radius: var(--r-lg);
  padding: 10px 16px;
  display: flex;
  align-items: center;
  gap: 12px;
  z-index: 500;
  box-shadow: 0 8px 32px rgba(0,0,0,0.5);
  backdrop-filter: blur(10px);
  font-size: 0.85rem;
  color: var(--text-2);
  white-space: nowrap;
}
.select-action-bar.hidden { display: none; }

#select-count { font-weight: 600; color: var(--purple); }

#clear-select-btn {
  background: none;
  border: none;
  color: var(--text-3);
  cursor: pointer;
  font-size: 0.82rem;
  padding: 4px 8px;
  border-radius: var(--r-sm);
  font-family: inherit;
  transition: color var(--t);
}
#clear-select-btn:hover { color: var(--text-1); }

#bulk-dl-btn {
  background: var(--accent-d);
  border: 1px solid var(--accent);
  color: #fff;
  cursor: pointer;
  font-size: 0.82rem;
  font-weight: 500;
  padding: 6px 14px;
  border-radius: var(--r-sm);
  font-family: inherit;
  transition: background var(--t);
  display: flex;
  align-items: center;
  gap: 6px;
}
#bulk-dl-btn:hover { background: var(--accent); }
#bulk-dl-btn:disabled { opacity: 0.5; cursor: not-allowed; }