:root{
--shadow-sm:0 1px 2px rgba(27,35,32,0.06);
--shadow-md:0 8px 24px rgba(27,35,32,0.08);
--shadow-lg:0 20px 48px rgba(27,35,32,0.12);
--shadow-focus:0 0 0 3px rgba(107,122,42,0.35);
}