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CSS validation error
Using the CSS validation tool in Sigil 0.6.2, Calibre-generated page-styles.css doesn't pass validation.
I was perplexed until the helpful folks on Calibre forum explained to me that epub2 & epub3 do not support CSS3 but CSS2&CSS2.1 respectively.
So, as Sigil is the program for editing epub, it would be logical for it to send the ,css files to CSS2 & CSS2.1 validators and not to CSS3 as it does now.
Just a suggestion…
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