Product requirements
- Persistent labels and programmatically associated field errors
- Keyboard access to input, calculate, reset, and result controls
- Result announcements that do not unexpectedly move focus
- Text equivalents for charts and meaning not conveyed by color alone
- Responsive layouts that remain usable at 200% zoom
- Reduced-motion support and visible focus indicators
Accessibility defects that prevent completion of a calculation are release blockers. Affected tools remain outside the public release set until the blocking interaction can be completed with the supported keyboard and assistive-technology paths.