Fixed css to apply style to the header instead of div

Old:
![screen shot 2014-11-06 at 2 42 45 pm](https://cloud.githubusercontent.com/assets/897368/4942592/24e71f82-65ed-11e4-8895-e636eabb18f8.png)
New:
![screen shot 2014-11-06 at 2 42 52 pm](https://cloud.githubusercontent.com/assets/897368/4942593/290faa34-65ed-11e4-9c2f-181c8dd1cc33.png)