.tree-list details>summary{list-style:none}.tree-list details>summary::-webkit-details-marker{display:none}.tree-list .toggle{cursor:pointer;position:relative;padding-left:1.5em}.tree-list .toggle::before{content:"▶";position:absolute;left:0;transition:transform .2s}.tree-list details[open]>.toggle::before{transform:rotate(90deg)}.tree-view{margin:1rem 0}.tree-list{list-style:none;padding-left:1.5em}.tree-list ul{padding-left:1.5em}.tree-controls{margin-bottom:1rem}.tree-controls button{margin-right:.5rem;padding:.25rem .5rem;cursor:pointer}