A Nicer Accordion in Markdown?

[philiprhoades]

People,

I want to produce a nicer-looking, collapsible accordion in MD that can produce HTML looking like this:

A Nicer MD Accordion

where the headings in grey have their text and subheadings underneath collapsed - maybe the sub-headings need to be in a smaller point size too . .

Is it possible to extend MD to do this somehow?

Thanks,
Phil.