Hi, I'm a Phonegap Developer especially for the Android Platform I've developed several apps with the same technology, I've made tutorial lessons for Learning How to Develop with Phonegap so I know how Phonegap works. I can fix your problem about the styling. I think that the CSS files are loaded the problem is in your CSS code, the Android Platform is not like the iOS so there are many different screen size, densities and resolutions, so you need to make your app to work on all those devices, and if the problem is in the CSS Loading that can be solved too... It doesn't matter it says 10 days to finish it I can finish it faster because I love coding so I usually sit 8-10 h a day and sometimes more... well most of the time :)
I would be happy to help...
Best Regards, Angjelko.