> Even worse, when you click to an anchor section on a sticky-header page, the title of the section is hidden by the sticky header.
This, especially. If the browser were somehow informed about the header in a semantic way, it could avoid this.
This, especially. If the browser were somehow informed about the header in a semantic way, it could avoid this.
Better if the browser knew about the header and could position the linked anchor accordingly. In the absence of any facility to do that, just ditch the header.
* {margin:2em}