.category-tree{font-size:.95rem}.category-tree__empty{color:#888;font-style:italic;padding:1rem}.category-tree-node{-webkit-user-select:none;-moz-user-select:none;user-select:none}.category-tree-node--hidden>.category-tree-node__row{opacity:.5}.category-tree-node__row{display:flex;align-items:center;padding:.5rem .25rem;border-radius:4px;cursor:default;transition:background .15s}.category-tree-node__row--selected{background:#e3f2fd}.category-tree-node__row:hover{background:#f5f5f5}.category-tree-node__row--selected:hover{background:#bbdefb}.category-tree-node__toggle{background:none;border:none;padding:.25rem .5rem;cursor:pointer;font-size:.75rem;color:#666;min-width:24px}.category-tree-node__toggle:hover{color:#333}.category-tree-node__name{flex:1 1;font-weight:500;color:#333}.category-tree-node__count{font-size:.8rem;color:#888;margin-right:.5rem}.category-tree-node__actions{display:flex;gap:.25rem;opacity:0;transition:opacity .15s}.category-tree-node__row:hover .category-tree-node__actions{opacity:1}.action-btn{background:none;border:1px solid #ddd;border-radius:3px;padding:.15rem .4rem;cursor:pointer;font-size:.8rem;color:#666;transition:all .15s}.action-btn:hover{background:#eee;color:#333}.action-btn--add{color:#4caf50;border-color:#4caf50}.action-btn--add:hover{background:#e8f5e9}.action-btn--edit{color:#2196f3;border-color:#2196f3}.action-btn--edit:hover{background:#e3f2fd}.action-btn--delete{color:#f44336;border-color:#f44336}.action-btn--delete:hover{background:#ffebee}.category-tree-node__children{border-left:1px dashed #ddd;margin-left:12px}