АДКАЗАЦЬ - Deutsch

Can someone let me know how this: "Was machst du noch Schönes?" would be translated to English? I'm learning German at the moment. I understand the words, but it doesn't really make sense to me. Why is Schönes written with capital S? Is it from das Schöne, and then it would be something like: What are you doing beautiful? Then why is the -s added at the end of the word Schöne? 

Thank you for taking the time to clarify this for me. :)