I'm creating a wizard where in one of the steps the user needs to select only one option from a large list with hierarchy.
The list will have about 30 top level categories.
He can select the top level options or the sub level options.
The first idea was to create something like this: A large radio group with hierarchy.
The second option i thought about is with a search box that will do a live search in the options and reduce the list
Would like to hear you approach on this :)