If you want to be sporty, then you'll need the appropriate sports attire for it! I'm not at expert at these kinds of things. By that, I mean I don't know a lot about fashion and sports. However, I saw a site that sells some pretty cute looking clothes that would look perfect for your running/hiking adventure (or whatever other sport you may have a need for it)!
If you want to take a look at it, then see for yourself some pictures of the clothes from marmot here. They look pretty cute, right? I think you can find something there that will complement you yet will still serve its purpose and make you comfortable!