[markbac]

Summary

Every kind of poster section now has a choice of looks with style=, and colour= colours every one of them:

Kind	Styles, the default first	What colour= paints
A section	bar, line, card, plain	The bar, the heading, the rule or the top edge
{.stats}	strip, tiles, plain	The rules, the tiles or the figures
{.abstract}	box, quote, outline, plain	The fill, the rule, the frame or the text
{.summary}	banner, line, plain	The banner and the rules
{.references}	columns, list	The heading

• How it works: colour= sets one CSS variable, --c, on the part, and every style paints with var(--c, <the theme's colour>). With no colour=, each default looks as it did before.
• Errors: a style its kind doesn't have is an error that lists the styles it does have.
• Checked in Chromium in the default, dark and print themes. That caught one problem, now fixed: an outline abstract's frame fell back to secondary, which is nearly white in the print theme. It falls back to accent now.
• Examples: the release poster's figures are tiles, and the reliability report has a quoted abstract and an underlined summary.
• Docs: the posters chapter has a table of every kind's styles and what colour= paints. The writing guide covers style=, and FR-160 is extended.

Tests

• 1341 passed, 20 skipped, including a test of a style and colour on every kind, and the error for a wrong style.
• The browser tests pass.
• ruff check . passes, and so do both --strict lint runs.
• All four example posters build as one-page PDFs.

---

Generated by Claude Code