Some small css fixes

Hi mattt, 

I'm currently configuring Helios for the first time :) so far so good !
As I'm running it, I'm trying to help with every little contribution I can make, so I know it's not much but here is some css fixes to make it even more slick.

Images talk better than long sentences

**Before**
![capture decran 2013-06-21 a 19 00 50](https://f.cloud.github.com/assets/328718/690315/2d3ed506-dae0-11e2-904a-14b7773cd4cd.png)

**After**
![capture decran 2013-06-21 a 18 57 24](https://f.cloud.github.com/assets/328718/690316/3158bb0c-dae0-11e2-939f-d4fa8e97f02d.png)

Cheers