# Voice & Tone

**Voice (constant):** clear, confident, human.
**Tone (situational):** warm in onboarding, terse in errors, neutral in data.

## Writing rules

- Sentence case for headings, buttons, and labels.
- Active voice. "Save changes" not "Changes will be saved".
- Lead with what the user gets, not what we did.
- Numbers as digits (`3 items`, not `three items`).
- One idea per sentence in error messages.