Accessibility
What's been checked, and what hasn't.
The target is WCAG 2.1 AA.
What's actually been checked
Every colour pair in both themes measures at least 5.2:1 against a 4.5:1 requirement. All text is sized in rem and stays readable with the browser font size doubled, without clipping or sideways scrolling. The site's own disclosure elements use the browser's native <details> control, so keyboard and screen-reader behaviour is native rather than reimplemented.
Known gaps
Stated rather than hidden: there has been no screen-reader pass with an actual screen reader, and no keyboard walkthrough of the publish and reading forms. If something here is unusable for you, that is a defect and worth reporting — Contact.