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No.369 · Sections· New

Annotated Plate

A figure explained the way a field guide does it: numbered notes beside the plate. Point at a note and everything but its part dims, the part is outlined, and a leader line runs from the note to it.

The prompt

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Written for the variant you picked above: Paper

Build a "how it's made" section: a figure plate with numbered notes beside it, to explain one picture of a product (a screenshot, an SVG diagram) part by part. Layout: a <figure>. Container-query layout at 46rem: notes on the left (0.8fr), plate on the right (1.2fr), 56px gap; below it, the notes stack under the plate. Notes are an ordered list of full-width buttons under hairlines: a mono number ("01"), a serif term (20px) and a muted sentence (14px). The plate is a rounded 10px frame with a 1px ring, holding the figure at a fixed aspect ratio. A mono caption sits under it: "Fig. 2" in capitals, then the caption. Parts are boxes [x, y, w, h] in the figure's own coordinate space (for example 640 by 420). Each box has a small numbered marker (20px dot) at its top-left corner, always visible. Interaction: hover (mouse only), focus or click on a note makes its part active. Click pins it (aria-pressed, Escape unpins). Active state: a veil the colour of the page, 70% opaque, covers the plate with a cut-out where the part is, so the rest of the picture recedes; a 1.5px accent outline marks the box; the cut-out and outline slide to the new box in 320ms cubic-bezier(.2,.8,.2,1) (animate a 1 by 1 rect with transform translate and scale, in an SVG whose viewBox is the figure's coordinate space). The note's number and its marker turn accent. The leader line: an absolutely positioned SVG over the whole figure. Measure the note's right edge and the marker's centre with getBoundingClientRect and draw a path from the note, horizontally into the gutter, then straight to the marker, drawing itself with stroke-dashoffset in 320ms. Recompute on resize with a ResizeObserver. When the layout is stacked, skip the leader; the numbers carry it. A role=status line announces the active part. Paper and Night themes. Selected variant — Paper (paper): Palette for this theme (Paper): --ap-accent #2f6bff; --ap-bg #f6f5f1; --ap-dim rgb(246 245 241 / 0.72); --ap-ink #1b1a17; --ap-line rgb(27 26 23 / 0.13); --ap-muted #6b6861; --ap-plate #ffffff. Treat these as the root colour tokens, one value per role, and name them to suit your code. Select it with the theme option set to "paper". Keep every dimension, spacing value, state and motion from the brief unchanged, and keep text at 4.5:1 contrast or better on these surfaces. This selection takes precedence over references to other themes or options in the general brief. Implement this selected appearance; do not add a variant picker or alternative appearances unless requested. 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: Hover or tab through the notes to see each part picked out; click a note to pin it and Escape to release. Motion: Veil fades in 200ms; cut-out and outline slide 320ms; the leader line draws in 320ms. Accessibility: Notes are real buttons in an ordered list; focus activates a note and click pins it with aria-pressed. The figure keeps its own accessible name and a status line announces the highlighted part. The veil and leader are aria-hidden. Reduced motion removes the slide and the draw. Responsive behavior: Two columns above 46rem of container width; below it the notes stack under the plate and only the numbered markers point at parts. Touch: Tap a note to pin its part; tap again to release. Hover is never required. 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
Hover or tab through the notes to see each part picked out; click a note to pin it and Escape to release.
Motion
Veil fades in 200ms; cut-out and outline slide 320ms; the leader line draws in 320ms.
Accessibility
Notes are real buttons in an ordered list; focus activates a note and click pins it with aria-pressed. The figure keeps its own accessible name and a status line announces the highlighted part. The veil and leader are aria-hidden. Reduced motion removes the slide and the draw.
Responsive
Two columns above 46rem of container width; below it the notes stack under the plate and only the numbered markers point at parts.
On touch
Tap a note to pin its part; tap again to release. Hover is never required.

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