Added an inset box shadow for the title

![blender](https://cloud.githubusercontent.com/assets/3432543/4408537/bc7d72ea-44d4-11e4-86df-d12f25c572c9.png)

I think it looks good but obviously that's opinionated.

Box-shadow is supported in [nearly all browsers](http://caniuse.com/#feat=css-boxshadow) and will just be invisible otherwise.