Articles on Smashing Magazine | For Web Designers And Developers Follow Advanced Tree Counting: Mathematical Layouts With sibling-index() And sibling-count() Meet sibling-index() and sibling-count(). Staggered cascade effect in one line of CSS without :nth-child() rules or JS workarounds. Works for 5 items or 5,000. https://smashingmagazine.com/2026/05/mathematical-layouts-sibling-index-sibling-count/ smashingmagazine.com
sibling-index()andsibling-count(). Staggered cascade effect in one line of CSS without:nth-child()rules or JS workarounds. Works for 5 items or 5,000.