Accessibility

WCAG 2.2 at level AA. That is the standard the site is built and reviewed against.

These are checked, not aspirational:

• Every control reachable by keyboard, with a focus ring you can see. The previous build removed focus outlines in eight places and put nothing back.
• Tap targets at 44 pixels or larger throughout. The previous build shipped 32-pixel hotspots.
• Real labels on every form field, tied to the input. Placeholder text is a hint, never a label, because it disappears the moment you start typing.
• Errors announced, not only coloured. Each message is tied to its field, and the outcome of sending the form is read out.
• Text on the orange buttons is near-black rather than white. White on that orange measures 3.21:1 and fails AA; near-black measures 6.55:1 and passes.
• Animation respects your reduced-motion setting, and the scroll-driven teardown has a still alternative rather than a frozen one.
• Every simulation states its outcome in text as well as showing it, so the physics survives without the picture.

Stated plainly, because a statement listing only successes is not a statement.

• No independent accessibility audit has been done. Everything above is our own testing.
• The scroll-driven scenes on the home page are checked against reduced-motion, but have not been tested with a screen reader end to end.
• Some simulations describe their state in text but do not yet announce every change as you drag them.
• Long lesson pages do not have a table of contents, which makes them slower to move around with a screen reader than they should be.

If something here stopped you reading it, we want to know, and we would rather hear it bluntly. Tell us what you were using and what happened, and we will fix it or tell you honestly when we can.

This page is rewritten whenever the list above changes. The date at the top is when that last happened.