Cookie banner WCAG 2.2 compliance

[mjbp]

https://www.w3.org/WAI/WCAG22/Understanding/focus-not-obscured-minimum.html.

At a high level - a focusable element should not be obscured by a fixed element.

"Ways of passing include making the banner modal so the user has to dismiss the banner before navigating through the page, or using scroll padding so the banner does not overlap other content."

Recommend adding scroll-margin-bottom style to focusable elements when the banner is active.