In FTU there is one situation (in the Privacy panel, see Bug 812956) where I need to nest a H2-like header just after a section. The problem is that this section is a nested section, which means that the header is the first-child of this section and gets a H1-like style. In the mean time, I'm hacking this by inserting a display-none element before, but i'd rather have this bug fixed. A proper fix would be to have a proper styling depending on the nesting depth of section/article. That would also allow us to use <h1> instead of <h2> but that's really not so important.

Ismael & Arnau, can you guys investigate this one?

Julien, you may not use a section for that kind of container so. The BB have a closed structure by definition, to avoid having to declare extra "unnecessary" classnames and for exposing to the developer a defined mark-up to use. I don't think there is plan right now to change that. Sorry for any inconvenience! Thx!

(In reply to Ismael from comment #2) I'll not change the whole structure of the First-Run-Experience now ;) I'm quite ok that the structure of FRE is maybe not correct and that we don't want to change BB at this time. This bug is more for the after-v1 world.

I think this bug is fair, I´ll propose a new structure for headers although we´ve had this discussion before! Whenever you have a subheader in your app, if it´s not at the same level than the main header, you will need to copy the styles manually to your app's css. Basically now won't work if you have a fixed header, and you need a container for the content including subheaders, and needs to be scrollable.