ugođaj

1. atmosphere; mood
   Sveće stvaraju prijatan ugođaj u stanu. — Candles create a pleasant atmosphere in the flat.
   U gradu već vlada praznični ugođaj. — There's already a festive mood in the city.

In Serbia atmosfera or ambijent are more common, colloquially štimung; ugođaj is also used, especially in describing places and holidays (praznični ugođaj, kućni ugođaj), but less often and more in writing.