css/preview-stack.css

#preview-stacked-cards {
  --cards: 3;
  --cardTopPadding: 3rem;
  --cardMargin: 1rem;
}

#preview-stacked-cards {
  list-style: none;
  padding-left: 0;
  display: grid;
  grid-template-columns: 1fr;
  grid-template-rows: repeat(var(--cards), 1fr);
  gap: var(--cardMargin);
}

#preview-stacked-cards > div:nth-child(1) {
  --index: 0;
}
#preview-stacked-cards > div:nth-child(2) {
  --index: 1;
}
#preview-stacked-cards > div:nth-child(3) {
  --index: 2;
}

#preview-stacked-cards > div {
  position: sticky;
  top: 0;
  padding-top: calc(var(--index) * var(--cardTopPadding));
}

@media screen and (max-width: 1024px) {
  #preview-stacked-cards {
    --cardTopPadding: 3rem;
    --cardMargin: 1rem;
  }
}