`product`
=========

Spec: descriptive guidance, not a checkable rule.
It carries no forbidden and instead pair, and no `jig check` detector applies to it directly.
Section: Interface modes

**For:** authenticated application UI, customer-facing dashboards, settings, onboarding.
**Reader:** returning, task-focused, moderate familiarity, mixed device.
**Tiebreaker:** predictability over novelty. A boring pattern the user already knows beats a better one they must learn.

| Property | This mode selects |
| --- | --- |
| UI text | `--text-body` |
| Long-form text | `--text-prose` · `--leading-prose` |
| Heading ramp | `--text-h3` → `--text-h2` → `--text-h1` |
| Type ratio | 1.200 Minor Third — the mid value of the three |
| Measure | `--measure-prose` |
| Section rhythm | `--spacing-section` |
| Card padding | `--spacing-card` |
| Control height | `--size-control` — the mid value of the three |
| Table row height | `--size-row` |
| Radius | `--radius-control` (sm) · `--radius-surface` (md) |
| Elevation | `--shadow-none`; `--shadow-raised`/`--shadow-overlay` for overlays only (modal, popover, dropdown) |
| Motion | `--duration-base`; state change only, no entrance animation |
| Colour usage | `--color-brand` for primary action. Full semantic set. Status as subtle fill plus text. |
| Imagery | Sparse. Illustration permitted in empty states only. |
| Keyboard | Shortcuts for frequent actions; documented in-app |

Resolved values: `02-tokens.md` — the option sets for type, spacing, radius and shadow, and "Sizes and motion, by mode" for control heights, row heights, durations and measure.

**Mode-specific rules**
- One primary action per view. Everything else is secondary or tertiary.
- Destructive actions are never adjacent to their most common neighbour, and always confirm.
- Every list view handles four states explicitly: loading, empty-never, empty-filtered, error.
- Forms save on explicit action, not on blur, unless the surface is a settings panel — and then say so.
- Navigation position is fixed across the app. Never move the primary nav between sections.