Quote:
Originally Posted by Toxaris
AFAK, you cannot. If I understand correctly, the stylesheet is made inline for the html documents. So, effectively there is no stylesheet anymore.
Without a doubt if I am mistaken, someone will correct me.
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Nope, just MOBI as it doesn't really support CSS.
If Edit Book is showing calibre* classes, it means that that AZW3 was already converted at some point using calibre. The information you want is long gone.
You will need to find an earlier source of the book, possibly a backup copy.
"Flatten CSS" is part of calibre's conversion pipeline. It happens after the book is exploded (AZW3 Input plugin), during the actual *conversion* phase.
Edit Book only makes use of the Input stage, in order to present the book resources for editing. Same reason why importing a DOCX in the Editor provides much cleaner output than converting to EPUB.