Inclusion
Accessibility Statement
We aim to make this educational resource usable by as many people as possible, on any device and with assistive technology.
Our commitments
- Text and background colours are chosen for strong contrast in both light and dark themes.
- All interactive elements are reachable and operable by keyboard, with visible focus outlines.
- A skip link allows keyboard users to jump straight to the main content.
- Pages use semantic HTML — one H1, ordered headings, real lists, tables with header cells.
- Every meaningful image carries descriptive alternative text.
- Motion is subtle and respects the operating system's reduced-motion preference.
- Layouts reflow to small screens without horizontal scrolling or clipped text.
- Font sizes are set in relative units and respond to browser zoom and text scaling.
Theme choice
A light and dark theme are both provided, and the preference is remembered on your device. Colour is never the only means of conveying information.
Known limitations
Some data tables are dense and may require horizontal scrolling on very small screens. We are continuing to improve the presentation of tabular content and welcome reports of any barrier encountered.
Standards
We work toward the Web Content Accessibility Guidelines (WCAG) 2.1 Level AA as a practical target. Accessibility is treated as an ongoing process rather than a one-time certification, and we do not claim formal third-party conformance testing.
Feedback
If any part of this site is difficult to use, we want to know. Accessibility reports are handled through the same correction process described in our editorial policy.