Stacked Index Menu

An editorial navigation stack turns the active row into an oversized index, contextual description and shifting visual signal without moving neighboring links.

• Product navigation
• Account flows
• Application shells

• Active content expands inside a fixed row grid
• Arrow keys move through the complete link collection
• Preview signal and descriptions never replace link labels
• A component-specific renderer and control contract—not a palette swap of another release
• Semantic controls, visible focus and keyboard navigation ship with the visual system

No animation package or external preview asset is required. Layout is container-scoped and decorative motion is disabled when reduced motion is requested.

Pointer, touch, horizontal trackpad and keyboard states use the same underlying component state.

Native landmarks and controls preserve reading order, visible focus and keyboard access. Motion never carries the only meaning.