2.4.12 Focus Not Obscured (Enhanced)
Conformance level: AAA
Criterion released in WCAG version: 2.2
TL;DR: Ensure focused elements are fully visible—not partially covered. Design overlays and sticky UI so focus always stays completely in view.
Official description of the success criterion
When a user interface component receives keyboard focus, no part of the component is hidden by author-created content.
What to do?
Ensure that when an item gets keyboard focus, it is fully visible.
Why is it important?
People who can't use a mouse need to see what has keyboard focus.