Page structure
Every page is the same three landmarks — a header, a main
and a footer — with the document's outline living inside
main.
The shell
One header, one main, one
footer, as direct children of body. That gives you the
banner, main and contentinfo landmarks for free.
<body>
<header> … site navigation … </header>
<main> … the page itself … </main>
<footer> … site footer … </footer>
</body>
The header
The header holds navigation. The brand is a
link, not a heading; each bar is a nav with an
aria-label, a title, and a ul of links. Stack more
nav bars for deeper levels — see
Navigation.
Main & headings
Inside main, a single h1 names the
page — not the site, which is the brand. Sections open with a bare heading, one
level deeper each time you nest (h1 → h2 →
h3). There is no header element inside a section, and
layout containers never use the landmark tags either.
<main>
<h1>Page title</h1>
<section>
<h2>A section</h2>
<section>
<h3>A subsection</h3>
</section>
</section>
</main>