Shadows

Soft, warm shadows with a brown tint — the same warmth as the rest of the palette, so elevation reads as a friendly surface lifting toward you, not a cold gray smudge. (Metal rising off glass is the proposed system's story — official surfaces are flat and solid; they just lift.) A ladder from --shadow-hairline (flat ring) up to --shadow-xl (modals, dialogs); --shadow-inset for the recessed/sunken case.