In-page
Location inside one long page — sections, not routes.
Mobile tab bar
Fixed bottom tab bar — Bar at the large height, SafeArea on the bottom, typographic selection.
Page control
Where you are in a paginated set.
Tabs
Peers at the same level — switch the view, keep the page.
Top bar
The product frame, in its variants — brand with actions, menu with brand, and the full bar with breadcrumbs, search and the user avatar.
Responsive
The full top bar in a resizable frame — drag the handle and watch it adapt to its container, not the viewport.