I’ve been reading halfway through the manual and so far I haven’t found instructions specific about this so I’m asking here.
As you can see on the screenshot the styling of furigana さくぶん is totally off.
Each mora “syllable” is very spaced out from each other, and too large that cannot match with the spacing of their respective Kanji below.
I want to have さくon top of 作, and ぶん on top of 文.
I’m not knowledgeable of HTML and CSS but if I can learn just enough to be able to get a handle of this without installing addons it’d be truly awesome.
The important thing is to make sure there isn’t any hidden html code there. Although, there is a space character between 作文 and the opening square bracket in your posted block. Is it the case for the original field as well, or was it something accidentally added during pasting?
Also, what is the version of the app you are using? (it’s displayed by opening Help → About Anki)