Focus in hidden content
Someone using a keyboard and a screen reader, or an AI agent, reaches controls that aren't announced.
When we count it as met
When the same pages are measured again, no hidden area contains controls that receive focus.
How to check it yourself
You can confirm it by tabbing through the page with the accessibility inspector open: focus lands on an element the inspector marks as hidden.
Measure it on your site
UXMachine measures it in a real browser, on desktop and mobile, together with the other checks.