Note 2: Content opened by the user may obscure the component receiving focus. If the user can reveal the focused component without advancing the keyboard focus, the component with focus is not considered hidden due to author-created content. Understanding 2.4.11 Show Hide techniques and failures for 2.4.11 Sufficient Advisory Failures Sufficient Techniques for Success Criterion 2.4.11 Note: Other techniques may also be sufficient if they meet the success criterion. See Understanding Techniques. C43: Using CSS scroll-padding to un-
   obscure content Failures for Success Criterion 2.4.11 F110: Failure of Success Criterion 2.4.12 Focus Not Obscured (Minimum) due to a sticky footer or header completely hiding focused elements Back to top 2.4.12 Focus Not Obscured (Enhanced) Level AAA (Added in 2.2) When a user interface component receives keyboard focus, no part of the component is hidden by author-created content.