Which parts of Croatia are Balkan-tier and which ones are Visegrad-tier?

Okay, this is legit question.

So, I'm trying to compile a "Visegrad+" list of countries that would fit well with Visegrad countries more or less.

So far: Poland, Lithuania, Czechia, Slovakia, Hungary, Slovenia... now with Croatia here is where I'm somewhat not so confident.

If Croatia would only be Croatia proper - then yeah, I think it would fit the bill.

But I am not so sure about the other 3 regions:

Can someone comment where would you put these 3 regions: either Visegrad-tier or Balkan-tier