.custom-tree .ant-menu-item-group-title{position:relative}.custom-tree .ant-menu-item-group-title:hover .btn,.custom-tree .ant-menu-item:hover .btn{display:block}.custom-tree .btn{display:none;position:absolute;top:0;right:10px;width:20px;height:40px;line-height:40px;z-index:1050}.custom-tree .btn:hover{-webkit-transform:scale(1.2);transform:scale(1.2);-webkit-transition:all .5s;transition:all .5s}.ant-checkbox-wrapper+.ant-checkbox-wrapper{margin-left:0;margin-right:8px;margin-bottom:4px}.single-select{list-style:none;padding:0}.single-select li{padding:12px 20px;margin:8px 0;background:#f8f9fa;border-radius:8px;cursor:pointer;-webkit-transition:all .3s ease;transition:all .3s ease;border:2px solid transparent}.single-select li:hover{background:#e9ecef;-webkit-transform:translateX(5px);transform:translateX(5px)}.single-select li.selected{background:#007bff;color:#fff;border-color:#0056b3;-webkit-box-shadow:0 4px 12px rgba(0,123,255,.3);box-shadow:0 4px 12px rgba(0,123,255,.3)}