:root{
  --sp-1:4px;
  --sp-2:8px;
  --sp-3:12px;
  --sp-4:16px;
  --sp-5:24px;
  --sp-6:32px;
  --sp-7:40px;
  --sp-8:56px;
  --sp-9:72px;
  --sp-10:96px;
  --sp-11:128px;

  --gutter-page:64px;      /* website section inset at desktop */
  --gutter-page-sm:24px;
  --gutter-slide:72px;     /* deck safe margin at 1920 wide */
  --section-y:96px;        /* vertical rhythm between website sections */
  --grid-max:1240px;
  --grid-gap:32px;
}