Problems validating WP CSS

Hi, I have all these problems validation my site CSS…
How can I fix them? Thanks in advance.

Most of those “errors” are due to the validator not recognising vendor prefixes, and perhaps some of the more advanced selectors like :not. If your CSS is working, forget about the validator.

Thank you so much, ralphm. I have some others question on how I could clean the header code in order for SEO. But I don’t know if I should open a new thread or if i can post them here. Let me know, and as said, thank you for your reply!

Probably best to ask another question that’s specific to that issue. :slight_smile:

Thank you again, ralphm.

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