I need to display a banner on top of the page, pushing all other elements down.
All the elements including the fixed/sticky header, top-0 elements etc. should be pushed down and the banner should be sticky.
But i need to add the banner to third party websites, I can’t predict the HTML structure of their webpage. Like there can be banners fixed on their sites already, but we should not overirde their CSS, but just push all the elements down and show ours on top of everything.