Can I live comfortably (hotels, restaurants, train) directly using euro only?
Croatia joined the EU on the 1st of July 2013 but still didn't adopt the Euro as currency.
I googled a bit and I found out an interesting site about the currency used in Croatia.
From this site:
So, it seems that Euros are accepted in certain cases but you should be prepared to pay in Kuna as well.
Officially: NO, because you have to be allowed to convert foreign currency first, if you want to be able to accept one. Often you may find people kindly rejecting Euro and they will explain that they would like to accept it, but it would be against the law.
However, as noted above, some individuals might accept it, as they know nobody will prosecute them.
So just for your understanding, you won't be able to buy anything with Euro in any big shops or government businesses, like public transport etc. You may be able to pay in SOME restaurants, thought.