Can't load external javascript code

Okay, still some odd looking indention. xD

So you get the CI Welcome message at: localhost/diceroller?

Try moving around your CSS file to see where it's actually at. Start putting it in the root folder (localhost) and work from there. Can't really help you any further, as it's not physically there according to your sever. The only thing I can thing of are that you have incorrect permissions on that folder.