---
category: Foundations
---

The seam. Panels in this pack are flat and separated by 1px lines rather than
shadows, so the rule is the same hairline the panels wear: `hairline` for
divisions inside one surface, `strong` (`--hairline-strong`) where two regions of
the console genuinely part company. A rule is never decoration — if it is not
separating two things a reader would otherwise merge, the answer was spacing.

```tsx
<Card title="Sequence 04" meta="ARMED">
  <p>Three stages staged, one held.</p>
  <Rule />
  <p>Held stage: cryo top-off, awaiting operator.</p>
</Card>
```