/* 開いているパネル直下の Flex を縦積み＆余白控えめに */
.components-panel__body.is-opened > .components-flex{
  justify-content: flex-start ;
  align-items: stretch ;
  height: auto ;
  gap: 6px ; /* お好みで 4〜10 */
}
/* 行間を少し締める */
.editor-post-taxonomies__hierarchical-terms-list .components-base-control,
.editor-post-taxonomies__flat-term-list .components-base-control{
  margin: 0 0 6px ; padding: 0 ;
}
.editor-post-taxonomies__hierarchical-terms-list .components-checkbox-control{ margin: 2px 0 ; }
.editor-post-taxonomies__hierarchical-terms-list .components-checkbox-control__label{ line-height: 1.2 ; }