[01. Elements for layout]
[1-2 Header and footer]
:
The header element is used to contain the site's logo or menu, and the footer element is used to contain information such as the creator's information or copyright.
The header element does not need to be at the top. It may be unrelated whether it is located at the top of the site, in the middle, or between section elements. The footer element is the same, but is mostly placed at the bottom.
