light hearted

/ˌlaɪtˈhɑrtɪd/
adjective
  1. Cheerful, carefree, and not serious; intended to be amusing or enjoyable.
    • The movie was a light-hearted comedy that made everyone laugh.
    • They shared a light-hearted conversation over coffee, avoiding heavy topics.
    • She has a light-hearted personality and always brightens the room.