:root{
  /* Hairline borders carry most of the separation; shadows are used sparingly. */
  --border-width:1px;
  --border-width-thick:2px;
  --rule-accent-width:3px;   /* the blue rule under section headings */

  --shadow-none:none;
  --shadow-xs:0 1px 2px rgba(17,19,21,.06);
  --shadow-sm:0 1px 3px rgba(17,19,21,.08),0 1px 2px rgba(17,19,21,.04);
  --shadow-md:0 4px 12px rgba(17,19,21,.10);
  --shadow-lg:0 12px 32px rgba(17,19,21,.14);
  --shadow-focus:0 0 0 3px var(--deca-blue-tint-32);

  /* Protection gradient for type over conference photography */
  --scrim-bottom:linear-gradient(180deg,rgba(0,0,0,0) 0%,rgba(0,0,0,.72) 100%);
  --scrim-left:linear-gradient(90deg,rgba(0,53,98,.88) 0%,rgba(0,53,98,0) 70%);
}