JowWow CSS Loader
JowWow CSS Loader allows you to add a language and template aware, custom stylesheet ( with relative or static pathing ), to your Joomla installation without hacking the core. Allowing for more universal and safe template customizing.
By having your .css styling changes in your own custom .css file you never again have to worry about updates destroying your changes.
You simply put all your changes into that file and viola' your set.
Instructions included in the extension description in the backend.
tested to work with J! 3.3.6 & 3.4
Now supports multiple simultaneous .css files & URL's.