Accessibility: Tracking issue for related improvements

Describe the bug

The WAVE accessibility evaluation tool reports several accessibility issues
on https://json-schema.org/, which impact screen reader and keyboard users.

Steps To Reproduce

1. Go to https://wave.webaim.org/extension/
2. Put site url: https://json-schema.org/ in the input box
3. generate the report.
4. OR simply visit this url: https://wave.webaim.org/report#/https://json-schema.org/

Expected Behavior

Content should meet WCAG 2.1 AA requirements.

Screenshots

Actual behavior:
WAVE reports multiple errors and contrast failures.

Evidence:

• WAVE report summary score: 5.4 / 10
• Screenshots or exported WAVE report attached

Device Information [optional]

- OS: Mac OS Tahoe 26.2
- Browser: Zen (Firefox)
- version: 147.0

Are you working on this issue?

Yes

Do you think this work might require an [Architectural Decision Record (ADR)]? (significant or noteworthy)

No