layout.css (3209 LOC) → 29 per-section files in src/styles/layout/ +
an index.css that imports them in original cascade order.
Same mechanic as theme.css + components.css splits: top-level sections
detected by single-dash or 3+ dash header decoration. Concatenating in
@import order reproduces the original byte stream (+1 trailing newline,
cosmetic).
Generated via /tmp/split-layout-css.mjs.
Frank Stellmacher