/* 可折叠目录树：箭头只负责展开，目录名称只负责切换当前位置。 */
.tree-panel {
  overflow: hidden;
}

.folder-tree {
  max-height: calc(100vh - 245px);
  overflow-y: auto;
  overflow-x: hidden;
  padding: 6px 4px 8px 0;
  scrollbar-width: thin;
}

.tree-branch {
  min-width: 0;
}

.tree-row {
  display: grid;
  grid-template-columns: 24px minmax(0, 1fr);
  align-items: center;
  min-width: 0;
  padding-left: 0;
}

.tree-toggle {
  width: 24px;
  height: 36px;
  padding: 0;
  border: 0;
  border-radius: 7px;
  background: transparent;
  color: #7b879b;
  display: grid;
  place-items: center;
}

.tree-toggle:hover {
  background: #eef3f9;
  color: var(--blue);
}

.tree-toggle:disabled {
  visibility: hidden;
  cursor: default;
}

.tree-toggle span {
  display: block;
  font-size: 18px;
  line-height: 1;
  transition: transform .16s ease;
}

.tree-branch.is-expanded > .tree-row > .tree-toggle span {
  transform: rotate(90deg);
}

.tree-row > .tree-node {
  height: 36px;
  min-width: 0;
  padding: 0 7px;
  gap: 7px;
}

.tree-folder-icon {
  flex: 0 0 auto;
  font-size: 12px;
  color: #53647e;
}

.tree-node.active .tree-folder-icon {
  color: var(--blue);
}

.tree-label {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  line-height: 1.35;
}

.tree-children[hidden] {
  display: none;
}

@media (max-width: 900px) {
  .tree-panel {
    overflow: auto;
  }

  .folder-tree {
    max-height: none;
    overflow: visible;
  }
}