Not optional. Cover at least: - [ ] skip link to the results - [ ] `role="status"` + `aria-live="polite"` on the result count - [ ] visible focus rings everywhere - [ ] every input has a label or `aria-label` - [ ] star rating is a radio group - [ ] `prefers-reduced-motion` respected - [ ] `axe-core` clean on the search page **Acceptance:** the whole search → detail → review journey is operable with the keyboard alone.