:root{
  /* Shadows are soft, neutral and low-contrast — never colored, never harsh. */
  --shadow-none:none;
  --shadow-xs:0 1px 2px rgba(26,26,26,.04);
  --shadow-sm:0 1px 3px rgba(26,26,26,.05),0 1px 1px rgba(26,26,26,.03);
  --shadow-md:0 4px 12px rgba(26,26,26,.06),0 1px 2px rgba(26,26,26,.04);
  --shadow-lg:0 12px 32px rgba(26,26,26,.08),0 2px 6px rgba(26,26,26,.04);
  --shadow-tile:0 6px 18px rgba(26,26,26,.07),0 1px 2px rgba(26,26,26,.05);
  --shadow-float:0 24px 60px rgba(26,26,26,.12);
  --ring-focus:0 0 0 3px rgba(26,26,26,.12);
  --inset-hairline:inset 0 0 0 1px var(--black-10);
}