OK -- I unzipped demoproblem.epub and ran style.css through the css validator. It told me that there were no errors but gave a warning for line 46:
Property font-family doesn't exist in CSS level 2.1 but exists in [css1, css2, css3]
which is in the @font-face definition.
I am now totally lost. If the "font-family" property is not valid, what do I use? What is correct?
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