style-part-01..08 were arbitrary 6,000-line cuts, so the names said nothing
and a reader had no way to guess which file held a rule.
The original stylesheet turns out to be roughly area-grouped already, so
cutting where the content changes rather than every 6,000 lines produces
boundaries worth naming. Classifying every top-level rule by selector prefix
and smoothing over a 40-rule window gives 17 stable runs: agent-chat, compare,
memory, documents, admin-settings, skills, gallery, cookbook, tasks,
image-editor, email, notes, calendar, research.
The numeric prefix stays because load order is load-bearing, and it also
disambiguates the areas that appear twice: the original interleaves, and
merging non-adjacent blocks of the same area would reorder the cascade.
The names describe where a file sits, not a claim that it holds every rule for
that area or only rules for it. The header in each file says so, because that
is the misreading this naming invites.
Reconstruction was checked against lab's style.css before rewriting: identical
after whitespace normalisation, all 47,528 lines accounted for. The computed
style baseline still reproduces exactly.
