I would like to request a little more distinction in the syntax highlighting for css variables.

Describe the bug
When a timed theme switch is delayed due to high GPU usage, the old monitoring module logged this incident.
The new module has been rewritten more efficiently and does not yet implement this behavior.

Expected behavior
The new GPU monitoring module logs the GPU usage once after the threshold has been surpassed with a message similar to the old module, e.g

I use the MacOS system,but I don't know how to do it,could you give me a user's guide？