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content@Ibelick

Use Tabular Numbers for Data

MUST

MUST: Use tabular-nums (font-variant-numeric: tabular-nums) for numerical data in tables, counters, and prices. Numbers align in columns without jumping.

Always use tabular-nums for numbers in tables and data displays for proper alignment

Bad

Good

Why it matters

From the Typography constraints in ibelick's baseline-ui skill (the Tailwind `tabular-nums` utility maps to font-variant-numeric: tabular-nums). Proportional figures have varying widths, so columns of numbers misalign and counters jitter as they tick. Tabular figures share one advance width, so data tables, prices, and numeric lists line up.

References

Built by Gleb Stroganov, design engineer at Evil Martians.

The rules come from other people's skills and guidelines — Vercel, Rauno Freiberg, @Ibelick, impeccable, Emil Kowalski, Tailwind, RAMS — each one credited on the Sources page. The work here is extraction and wiring: every rule is pulled into one corpus, given a good and a bad example you can operate, a MUST/SHOULD/NEVER rule an agent can paste, and a link back to where it came from.