površan

1. (of a person) shallow; superficial
   On je previše površan da bi to razumeo. — He's too shallow to understand that.
2. (of knowledge, a look, analysis) superficial; cursory
   Imam samo površno znanje nemačkog. — I only have a superficial knowledge of German.
   Bacio je površan pogled na papire. — He gave the papers a cursory glance.

The adverb površno is also very common: površno pročitati "to skim".