Potential issues with "0" values for css vars

[ildar170975]

There are plenty of CSS vars in a code with "0" value w/o a "px" unit:

And many of these values are for a "singular dimension" - i.e. a "height", "font-size" etc, not for a shorthand ("several dimensions").

Some of these values may be used in calc() - and this may cause errors.
Suggest to clean this up. I may try doing this also...