feat(style): improve mixin

[gregberge]

No description provided.

[codecov]

Codecov Report

Merging #225 (722b7fa) into main (1c35ef6) will not change coverage.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##             main     #225   +/-   ##
=======================================
  Coverage   91.97%   91.97%           
=======================================
  Files          58       58           
  Lines        1059     1059           
  Branches      192      192           
=======================================
  Hits          974      974           
  Misses         84       84           
  Partials        1        1           

Impacted Files	Coverage Δ
packages/system/src/style.ts	99.37% <100.00%> (ø)
packages/system/src/styles/backgrounds.ts	89.47% <100.00%> (ø)

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