Oracle: Shell canvas (dock/header glass, panels); Guideline §5 materials + §6 icon recipe
Fixed, dim radial glows in brand blue — never animated. Full strength on auth/launcher/empty states; canvas-dim behind module content. Text never sits directly on Canvas.
ALL content surfaces are opaque surface + 1px border, radius 12 (16 for tiles/dialogs). No blur, no transparency; dark elevation = lighter surface + border.
Transient chrome only: dock, module header, palette, scrims, toasts, mobile tab bar. Max 3 composited at once; menus/popovers are opaque (Round 7). prefers-reduced-transparency drops all but palette + scrim to opaque Panel.
Identity color, vertical gradient lighter at top (color-mix toward white), white Lucide glyph, inner top highlight, radius ≈26.5% of size. Below 32px only the glyph compensates (~56% → 70% of tile).