The eye separates an object from its background, and interfaces use that separation to signal layers.
UI foundation · Gestalt principles
Tag
modals
Entries tagged modals, drawn from across the library. Tags cut through the section structure, which is where most of the useful connections are.
3 entries across 3 sections
Type
Category
Level
3 entries
Blocks everything else, which is why it should be reserved for things that genuinely cannot wait.
Component · Overlays
Deliberately moving focus when the interface changes, so keyboard and screen reader users are not stranded.
Accessibility · Operable