epubs: replace stylesheets with calibre editor?

[edeniz]

I've got a quick question:

I've been using calibre's editor to create my own epubs for a long while now (since that's a function of calibre's that's super easy to use in comparison to other epub creator software! Thanks for that neat function, by the way!), but there is something I've been wondering:

Is it in any way possible to do a search/replace inside of multiple epubs and replace the old stylesheet with a new one? Or at least add a line or two into the existing stylesheet?

It probably is something one can only do one by one, but I thought I'd ask anyway just to be sure. (Thing is, the stylesheets in the epubs I created last year no longer appeal to me for reading the epub on my pc - it's still ok for my ereader, but I want some colors and such for PC/tablet reading of the epub.)



There is also something semi-related I've been wondering for a while:

Regarding conversion of html/txt/doc files into epubs: Is there any way to ensure calibre keeps the formatting of the file's stylesheet 1:1? Because as wonderful as the conversion tool is, no matter what I do with the preferences pre-conversion, the epub's stylesheet tends to come out an unappealing mess so I tend to avoid conversion and use ebook editor to create a new epub.

I hope I could explain my dilemma semi-coherently. It's all right if there is no way to do these things. I just need to know whether or not I've been making it unnecessarily harder for myself because I couldn't see the solution in front of me, you know?

Thank you in advance for any help.

[kovidgoyal]

No conversion will always flatten CSS. As for making bulk changes to books, you can use either conversion itself, see the Look & feel section of the conversion dialog, or I believe a few plugins have CSS transformation capability as wel.