The comment claimed the boxes were generated from ROW_COL. They weren't —
still w-32/w-16/w-48 by hand — so a comment promised a link that didn't
exist, which is worse than not claiming it. The boxes take the numbers
directly now (inline, since Tailwind can't read a runtime value), and the
thresholds add up in plain arithmetic rather than an IIFE whose result
depended on key order.