@toniabkscorsese
When working with HEADER and BODY, or FOOTER you should always pay attention on following things…
- blue-body-area should not cross the orange-header-area.
- using strips may solve some responsivibility-problems.
- menus can be created by using multistate-boxes inside header and footer (for example)
- also the usage of expanding and collapsing the header and footer elements can help.