More a classy restaurant than a bistro, Karlo brings a touch of modern-European culinary experimentation to central Zagreb's standard repertoire of grilled meats and Adriatic fish. The menu is small and subject to daily changes: the chef will come to your table and tell you what's fresh. Lamb-brain panna cotta is the most out-there of the regular starters, although delicate seafood risottos will calm the nerves of the less adventurous diner. There's a small handful of main courses on offer, with classic steak, lamb and fish dishes well represented - each accompanied by innovative garnishes. Portions are small, and prices are high, but the outlay is usually worth it. The bright white interior is relaxing and cheery, although several details - spangly chandeliers and over-ornate picture frames - err on the side of kitsch.