Just fixed a bunch of little accessibility issues and the Kitten web site now conforms to WCAG 2.1 AA.
I also added a feature to Kitten whereby it automatically adds tabindex='0' to code blocks so they can be focused and thus scrolled by people using assistive technologies.
(It was also my first time trying out the axe accessibility tools – available as a browser extension – and that really helped: https://www.deque.com/axe/)