perplexity / reference fixture

# Answers, not links.

Ask anything. Perplexity reads the sources, cites the passage, and returns a single, grounded answer — no ten-blue-links detour, no auto-play, no autoplaying anything.

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Answer Sources Steps

Q · who first measured the speed of light?

Ole Rømer, in 1676, by timing eclipses of Jupiter's moon Io as Earth moved toward and away from Jupiter — a delay of `~22 min` across the orbit yielded the first finite estimate.

nature.com en.wikipedia.org aps.org arxiv.org

what this fixture exercises

## Quiet by design.

### Cited

Every factual claim is attributed. Source badges sit beneath the answer in `JetBrains Mono`, sentence case, never decorative.

### Grounded

Flat `#0f0f10` canvas with three luminance steps. No gradient hero, no animated blob — the chrome recedes, the answer leads.

### Restrained

Purple `#a855f7` appears once per view: the primary action. Borders before shadows, content before motion.

form components

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