:root{
/* On dark, elevation is a surface step, not a shadow. Shadows are for light. */
--shadow-none:none;
--shadow-card:0 1px 2px rgba(0,0,0,.24);
--shadow-lift:0 8px 24px rgba(0,0,0,.32);
--shadow-modal:0 24px 64px rgba(0,0,0,.5);
--ring-selected:inset 0 0 0 1px var(--blue-500);
--ring-focus:0 0 0 3px rgba(47,111,237,.4);
}

[data-theme="light"]{
--shadow-card:0 1px 3px rgba(10,10,10,.08);
--shadow-lift:0 10px 30px rgba(10,10,10,.10);
--shadow-modal:0 30px 70px rgba(10,10,10,.18);
}