Header
The application header is a fixed-position bar at the top of every screen for the most critical app information and controls. Along with the left side navigation, the header should provide a consistent look and feel cross-product.
Header basics
App headers must have an id #app-header
and have two main flex-aligned groups: the logo and product name in an <aside>
element and a variable-width section for controls in a <main>
element.
Within the <main>
element there are two additional sections that are also flex-aligned and justified with space-between: a .page
section for app or site controls, and a .user
section for user-level links, icons, and buttons.