:root{
  --space-1:4px;
  --space-2:8px;
  --space-3:12px;
  --space-4:16px;
  --space-5:24px;
  --space-6:32px;
  --space-7:48px;
  --space-8:64px;
  --space-9:96px;
  --space-10:128px;

  /* deck + page geometry taken from the 1920x1080 source slides */
  --slide-w:1280px;
  --slide-h:720px;
  --slide-margin:56px;
  --block-pad:20px;
  --column-gap:24px;
  --page-max:1200px;
  --band:120px;      /* hero + closing band rhythm */
  --section:88px;    /* vertical rhythm between bands */
  --card-pad:32px;   /* product / feature card padding */
}