I can't share my original project, but I made an example in which I put the same css code in as before. I am sure I am missing some step(s), but I don't know which. Probably some extra code in the css sheet.
Ashley The project is here, could you have a look, please?:
my.hidrive.com/lnk/3cSTCmcd
Edit: after reading the comments again and seeing this video: youtube.com/watch I get the impression that I can't style form buttons that way but have to program my own buttons in the html object, is that correct?!