I think ePub's can handle everything you mentioned, ePub's are just XHTML, and a subset of css [1]. Not sure about callout boxes, I don't know exactly what subset of elements are available as I've never written one, but everything else you've mentioned looks to be available [2].
Fun epub file trick: rename the file .zip, unzip -a yourbook.zip (double click unzip doesn't work on osx for me for some reason) and check out the html, css, images and xml of your book.
There's actually quite a lot of evidence that it was a politically motivated spear phishing campaign from FancyBears, which is most likely from Russia. So technically yes there's no definitive, smoking gun proof but "no proof for this claim" seems to be a bit dismissive of some glaring hints. It certainly wasn't just a "generic phishing page" or guessing of a weak password.
They went after quite a few politicians on both sides of the aisle and journalist's, the Podesta camp just happened to be the ones who fell for it.
Am I missing something or is there not a single link to the study in this article? Didn't see it anywhere on mobile.
After the title there isn't really any info about dietary fats but instead will read about how basically all this study may have found is that those doing "low fat diets" might end up eating really crappy carbs. I can't find the link to the study though so maybe they found something else..
I don't think people eating crappy carbs and drinking soda could really be considered "dieters" they seem more like "unhealthy eaters who happen to be eating low fat".
From the article:
"Those doing so tended to eat far too much stodgy food like bread, pasta and rice, the experts said, while missing out on vital nutrients.
Participants eating the highest levels of carbohydrates – particularly refined sugars found in fizzy drinks and processed meals – faced a 28 per cent higher risk of early death."
Also their suggestion goes on to say a good balance is 35% of calories from fat which I would say is still fairly 'low-fat' of a diet IMO but I guess that's pretty subjective and I'm not a dietician.
Fun epub file trick: rename the file .zip, unzip -a yourbook.zip (double click unzip doesn't work on osx for me for some reason) and check out the html, css, images and xml of your book.
[1] https://en.wikipedia.org/wiki/EPUB [2] https://www.w3.org/TR/2005/WD-xhtml2-20050527/elements.html