Symptom: Arbitrary value with spaces breaks

Root cause#

Spaces terminate the class token.

The fix#

Replace spaces with underscores: grid-cols-[1fr_2fr].

Verify#

  • Hard-refresh (the CSS cache is the #1 false negative)
  • Run nakshora doctor and re-build with --stats
  • Search the docs for the exact class — spelling is unforgiving

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