Carries state — every hue maps to a sensor reading, not a brand preference.
Carries priority — brightness ranks information instead of decorating it.
Carries surface — refractive glass, so one pill lens serves many roles without hiding what sits under it.
Carries position — blur and opacity place a level in the stack.
Token names are derived, not assigned. The family comes from the HSL hue and the step from the HSL lightness, so --lum-blue-52 states its own value and two designers naming the same swatch independently arrive at the same token. Core and applied light are one family read at two levels — the applied set is the core color seen through refractive glass at 34%, not a second palette — which is why ΔL is the only number separating them.
Carried forward: the same eighteen swatches, the same six glass values, and the same five-step scale — Color, Light, Material, and Depth read side by side as one reference.
Extended across: one five-step opacity ladder and one refraction gradient set how much of what sits underneath a surface is allowed to show. Brightness ranks the read, not label size.
Built out: four glass surfaces share one blur radius and one shadow logic, so a pill reads as the same material on a dashboard, a kiosk, or a vehicle door. Only tint and opacity change from one surface to the next.
Constraint: every material in the system sits at the same 22px blur radius today, so depth reads as one plane rather than a stack. A second radius would need to exist before position could rank one surface above another.
