Accessibility
Access is the work.
A house that names neurodivergent-first design as a program of inquiry does not get to treat accessibility as a compliance exercise. An accessibility failure here is a positioning failure.
Standard
sigmaclava.com targets WCAG 2.2 Level AA. In
practice that means semantic landmarks and headings, a skip link
that moves focus, one h1 per page, visible keyboard
focus on every interactive element, labelled form fields, and text
alternatives for every meaningful image and drawing.
Contrast is measured rather than assumed. Where text sits over a plate, we sample the brightest pixel behind it and check against that, not against the average: body copy over the page headers measures at least 6:1, and headlines at least 9:1.
Motion and sensory load
There are three pieces of motion on this site, and all three stop
under prefers-reduced-motion: the summation mark
typesets once on load, the field of points behind the front-page
hero drifts at about two per cent over four minutes, and each
section fades up two hundred milliseconds as it is first reached.
Nothing autoplays, nothing parallaxes, and nothing flashes.
Sections are readable without JavaScript. The fade is applied by script and removed for printing, so nothing can be left invisible by a reveal that never fired.
Drawings and imagery
Every plate carries a description of what it shows, and every drawn
figure carries a <title> and a longer
<desc> stating its content in words, including
the relationships the drawing encodes rather than merely its
subject. The
caption under each one says what it means. A person who never sees
any of the imagery loses nothing from the argument.
Imagery on this site is generated procedurally from a script rather than photographed or bought, and none of it depicts people, faces, or places. Plates behind page headers are grounds, held well below the text they sit under, and are marked as decorative so they are not announced twice.
Known limitations
Wide diagrams scroll on narrow screens. The
research cycle, the governance intersection, the programs field and
the lineage are drawn at a width where their labels stay legible.
Below about 900 pixels they scroll horizontally inside their
own frame rather than shrinking into illegibility. Each scrolling
region is keyboard-focusable and named, and the surrounding prose
and the <desc> carry the same information for
anyone who would rather not scroll.
The lineage diagram has small labels. Its captions are set below the size we would choose for body text. The same information is in the prose beneath it.
We review the site against WCAG 2.2 AA with each significant change, and this page is updated when a limitation is added or removed.
Feedback
If any part of this site is difficult for you to use, that is information we genuinely want. It is the same kind of data the Neurodivergent-First Design program treats as primary. Write to us through the correspondence form; accessibility correspondence is read with priority.