Replace the fixed 100rem two-column breakpoint with 'columns: 30rem' so
CSS fits as many >=30rem columns as the article's width allows, and let
long (.multicol) articles grow past the 78rem cap (4:1 share against the
gutters, keeping them symmetric for the .wide breakout math). Also treat
mid-article h1s as full-width column separators like h2s.
LeoVasanko
d03ee7fa8f