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Originally Posted by rjnagle
My goal is on the title page and chapter headings to keep the headings bigger for large displays and smaller for small displays. Sounds logical, right?
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I don't see the logic in that. Sizing headings in ems allows them to be naturally proportioned to the body text. I don't see any advantage to having them be even larger on displays with more pixels. Especially since device resolution is increasing over time, resulting in displays with more pixels for a given screen size.
Quote:
Originally Posted by rjnagle
How do you make queries so that smaller displays actually are activated by them?
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If you are planning to produce a Kindle book for sale on Amazon then I would avoid the use of media queries for anything except providing different formatting for backward compatibility for older Kindle devices. This is the use case that the documentation you called out focuses on.
For the last five years Amazon has been transitioning to KFX format. (They do not mention that format by name in their documentation, but instead refer to it as Enhanced Typesetting.) KFX format does not support media queries. Any that are present in the source EPUB file are evaluated during the publishing process using generic values for the various properties and the resulting styles are baked into the KFX file.