Accessibility Statement
Last updated: 2026-04-17
Our commitment
Signals & Systems is committed to WCAG 2.1 AA as a target, not a boast. This page describes what is actually true today, what's still in flight, and how to tell me when something gets in your way.
What's in place today
- Skip-to-content link that appears as the first focusable element on every page.
- Semantic landmarks (
<header>,<nav>,<main>,<footer>) and heading hierarchy. - Keyboard navigation for the primary nav and mobile menu, with ESC + outside-click to close.
- Consent dialog uses
role="dialog"with a focus trap and ESC-to-decline. - Charts expose an SR-only data table and an aria-label derived from the chart description or title.
- Wiring schematics expose
<title>/<desc>viaaria-labelledbyand can carry a textual connection list. - Visible focus indicators on interactive controls; the one
focus:outline-noneoffender has been replaced with afocus-visiblering.
What's in place today (continued)
- Dark mode with a toggle in the primary nav, persisted in
localStorage. Respectsprefers-color-schemeon first visit and setsdata-themebefore paint to avoid flash.
Known gaps
- Automated a11y scans (pa11y-ci + Lighthouse) are not yet blocking in CI — they're being stood up as advisory-first so we fix the backlog before enforcing.
- Alt-text coverage on inline images in articles is inconsistent; it's being audited.
- Dark mode contrast has been implemented but not yet re-audited with axe/Pa11y against every component state — the advisory a11y workflow will catch regressions as the dark palette settles.
- Chart components accept a
descriptionprop but don't currently enforce it — some older charts rely on title-only labelling.
How to report a barrier
If something on this site gets in your way, please tell me. The fastest path is a GitHub issue using the a11y report template — it captures the page, the assistive technology, and what you expected.
File an accessibility report on GitHub · or email contact@jellwrites.com.
Keyboard navigation reference
The site is fully operable without a pointing device. These are the shortcuts you'll use most often.
Navigation shortcuts
Screen reader shortcuts
Note: Screen reader shortcuts vary by software (NVDA, JAWS, VoiceOver). Consult your screen reader's documentation for the full key map.