Sony PRS-505 style.css and calibre
I've been trying to create a custom css for a more uniform look to my epubs, but have run into an issue with my epubs. It seems like every third epub I create with calibre has new classes. Typically I'll have an RTF that I will edit to add heading tags for chapters and then convert to epub. Should I be saving to a different format first; or is there some logic to the css classes assigned by calibre that I'm missing?
Sorry if this doesn't make a lot of sense, I'm new to the css thing.