Individual skill
subgrid
Use when reviewing card grid layouts with misaligned content areas, or any nested grid where child items need to align with sibling cards' corresponding sections without JavaScript intervention.
skills/subgrid/SKILL.md
Source commit e8d14d049010e2ce25afcd5e8609dfcbbe63e47e
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- Observed behavior
- Instructions only
- Last checked
- Nov 9, 2026
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- Repository last updated
- Oct 31, 2026
- License
- MIT
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- frontend Repository topic
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- reference Repository topic
- web-development Repository topic
- html Repository topic
- css Repository topic
- javascript Repository topic
- writing Derived category
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SKILL.mdcore · 2,172 bytesreferences/rule.mddoc · 7,239 bytes
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# Use CSS subgrid to align nested grid items to parent tracks
Card grids are one of the most common UI patterns, but aligning content across cards — matching title heights, content areas, and footers — has historically required JavaScript height measurement or CSS hacks. Subgrid solves this at the layout engine level: nested items participate directly in the parent grid's tracks, so alignment is automatic, performant, and CSS-only.
## Quick Reference
- subgrid lets a nested grid inherit its parent grid tracks instead of creating new ones
- Solves misaligned card titles, content, and footers across rows of cards
- No JavaScript height matching needed — the browser handles track alignment
- Universal support: Safari 16+, Chrome/Edge 117+, Firefox 71+
## Check
Look for card grid layouts in this CSS where card content areas (titles, body text, footers) might not align across cards of different content lengths. These are candidates for subgrid.