Vertical text in ePub/CSS: not there yet
Languages aren’t just written right-to-left or left-to-right, of course. They can also be written top-to-bottom, as in Chinese. How can you indicate that a block of text should be rendered vertically rather than horizontally?
In ePub, you can’t.
I was surprised to discover that the subset of CSS supported by ePub only includes the rtl or ltr [...]