Thank You for Your response.
You're right. azw3 opens on my kindle.
But there is problem with styles. Epub has special styles for dark mode (because of eaa - european accessibility act). When I convert epub to mobi/azw3 the letters are pale and it is impossible to read the book. That was the reason why I wanted to convert it as I mentioned.
So maybe is there a way to convert epub to mobi/azw3 without epub styles?
And why azw3 opens on my kindle and out.mobi does not?
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