:root{
--space-1:4px;--space-2:8px;--space-3:12px;--space-4:16px;--space-5:20px;--space-6:24px;--space-8:32px;--space-10:40px;--space-12:48px;

/* Touch — generous, because the operator is standing and moving */
--touch-min:48px;--touch-large:56px;

/* Shell */
--header-height:64px;--sidebar-width:236px;--sidebar-width-collapsed:72px;--drawer-width:280px;

/* Board density */
--grid-gap-sm:8px;--grid-gap-md:16px;--grid-gap-lg:20px;--grid-gap-xl:24px;
--card-min-h-xs:112px;--card-min-h-sm:154px;--card-min-h-md:204px;--card-min-h-lg:236px;--card-min-h-xl:272px;
}