Tier 2Android: tokens only. This is a stock Material 3 element, coloured by a darkColorScheme built from the token graph. It is not a build instruction.primary → --yellow-solid · surface → --app-bg · outline → --border · error → --red-solid
Navigation barNavigationBarstock · do not build
80dp tall. The selected destination gets a 56x32dp pill at 26% primary behind its glyph. Label weight and the indicator geometry are Material’s.
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Four destinationspill indicator on the selected item only
height80dp
indicator56x32dp pill, 26% --yellow-solid
selected glyph--yellow-solid
selected label--text
unselected--text-secondary
labellabelMedium, 12sp medium
glyphsPhosphor regular; fill when selected
wide windowsNavigationRail from 600dp; a modal drawer behind a Menu button when labels don’t fit
Do not. Float this bar or give it a glass material. That is the iOS 26 pattern; on Android the bar is opaque surfaceContainer and sits on the edge.
Contract: platforms/android/DESIGN.md