- Story page Inner side margin: 16px up to a 480px viewport, linear to 60px at 768px, 60px beyond (no width jump)
- Follow the 60px margins: Responsive 1920 row from a 2040px page (was 2000px); property compare 3 columns from 1125px, 2 columns from 787px (was 1080 / 720)
- SW browser tests: drop the removed --sb-page-max-width override, compare thresholds 787 / 1125