:root{
/* cool, navy-tinted shadows — never pure black, kept low-elevation */
--shadow-sm:0 1px 2px rgba(20,32,45,0.08);
--shadow-md:0 4px 12px rgba(20,32,45,0.10);
--shadow-lg:0 12px 32px rgba(20,32,45,0.14);
--shadow-focus:0 0 0 3px rgba(62,110,142,0.35);
}