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Advanced Tree Counting: Mathematical Layouts With `sibling-index()` And `sibling-count()`

Curated by John Arts

•Published November 4, 2026•Source: Smashing Magazine Creative & Design Articles

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smashingmagazine.com

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Global / Online

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<![CDATA[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.]]>

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