News story unit — the core feed component. Photos are gray placeholders until real photography is supplied.

```jsx
<ArticleCard variant="hero" kicker="Game recap" title="Coastal survives in overtime" dek="Three fourth-quarter stops…" author="Dana Whitfield" time="2h ago" />
<ArticleCard variant="compact" kicker="Recruiting" title="4-star LB commits" author="Marcus Bell" time="4h ago" />
```

Also exports PhotoPlaceholder and Byline helpers.