How to measure/determine the quality of the CSS code?

How to measure/determine the quality of the CSS code?

Silvestar Bistrović - Feb 2 '21 -

- Dev Community

I hope we have CSS enthusiasts here.
I wonder how you would answer the following question:
How to measure/determine the quality of the CSS code?

These are my favorites:

File size
File structure (for Sass or similar)
Usage of inline CSS code
Number of !importants
Usage of modern features (Variables, Grid, Flexbox, etc.)

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