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Two pages, one shell — a small page head, .content, and a sticky TOC rail with a last-updated date, all from _legal_page().
Both legal pages share exactly one helper, _legal_page() — crumbs, a title, a lead, and .content underneath. Nothing legal-specific exists in the CSS, because nothing needed to.
One shell, two bodies
The same prose element every post and doc page on the site uses — a legal page is not a special case.
.content
A TOC rail and a date
A legal page nobody can navigate is the same as a legal page nobody reads. Both pages get a sticky .col-rail with the section list and a visible last-updated date — the two things that make a wall of prose usable, and both already existed for collection posts.
.col-rail.col-rail-sticky + .list-group-flush — the same rail a course lesson uses for its curriculum