let boxtext fit under headers

Headers for subsubsection use 'runin' format. This is good because sentences can start without repeating the topic:

Dogs

Dogs are...

...instead the topic is the start of the sentence, which feels more natural when writing or reading.

Unfortunately the boxtext used a tcolorbox environment, which can't fit there, so areas cannot begin with descriptions. This seemed fine, as the background to an area happened first, and the present condition happens after:

Kitchen In the past, this kitchen worked.

Because of the event, it does not work.

[ You see a dilapidated kitchen ]

I now realize this has continuously prompted bad writing habits. Area descriptions must begin, and any background goes later, or in a footnote:

Kitchen [ This dilapidated kitchen has grease from ceiling to gutter. ]