Long articles now span from the left gutter (which holds the overlaying
sidebar) to the right viewport edge instead of reserving a symmetric
right gutter. The .wide breakout is re-anchored accordingly: left margin
is the gutter share (20vw of the 1fr+4fr grid, 1/5 of the post-editor
width while editing) plus main's padding; the <=102rem sidebar case keeps
its constant -13.25rem margin.
LeoVasanko
3cefdec56e