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No.203 · FAQ· New

Colour Register FAQ

Every question keeps its own colour: a small register becomes the open answer surface, so the FAQ reads like a carefully filed set.

The prompt

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The design brief behind this component — reuse it to regenerate, remix, or explain it.

Build a colour-indexed accordion on pale paper. Each stable-ID question owns one of five preset treatments: mint, lilac, blue, peach or butter. Closed, the row has a small vertical colour register beside a mono number, a medium-weight Geist question and a plus icon. Open, that same colour fills the entire row and answer surface, the register shortens and the plus becomes a minus. One answer may be open; activating it again closes all. Reveal content using a 0fr to 1fr grid transition over 320ms, without measuring content height. Accept arbitrary React-node answers, including links and long paragraphs. Link each heading button to its answer region with unique per-instance IDs; closed regions must be inert, aria-hidden and visually hidden. Arrow Up/Down and Home/End move among question buttons; Enter/Space activate normally. On a phone reduce padding while preserving number, wrapped question and icon alignment. Reduced motion changes all states immediately. Identity colour never substitutes for expanded state or a visible focus ring. Implementation requirements: Use React and TypeScript. Keep the component self-contained, with uniquely scoped CSS and no animation libraries. Include required imports, styles and font setup in the result. Interaction: Open one answer or close all. Arrow Up/Down and Home/End move focus without changing the open answer. Motion: 320ms grid-row expansion, colour fill and plus rotation; reduced motion is immediate. Accessibility: Semantic headings and native links/buttons, visible focus, decorative geometry hidden from assistive technology. Independent instances; honour reduced motion. Responsive behavior: Fluid layout and wrapping text at 320px through desktop. Page compositions stack intentionally on narrow screens; recovery links remain visible. Touch: Normal taps activate all actions. Pointer-only decoration is optional and fixed on touch. Preserve keyboard access, visible focus and reduced-motion behavior. Keep fictional demo data and simulated service calls in a separate usage example; expose callbacks for real actions and recover from rejected requests. Keep usage-example links inside the demo: use local buttons or prevent navigation. Demonstration links must not navigate to Vitrine routes or open other pages; preserve real URL support in the reusable component itself. Verify the result at narrow and wide viewport sizes, with keyboard input and reduced motion enabled.

Notes

Interaction
Open one answer or close all. Arrow Up/Down and Home/End move focus without changing the open answer.
Motion
320ms grid-row expansion, colour fill and plus rotation; reduced motion is immediate.
Accessibility
Semantic headings and native links/buttons, visible focus, decorative geometry hidden from assistive technology. Independent instances; honour reduced motion.
Responsive
Fluid layout and wrapping text at 320px through desktop. Page compositions stack intentionally on narrow screens; recovery links remain visible.
On touch
Normal taps activate all actions. Pointer-only decoration is optional and fixed on touch.

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