Sort CSS validator warnings by importance

Sorts CSS validator errors and warnings into fix now, fix later and ignore, with a reason for each and a safe fix.

Task: Sort the CSS validator messages below into fix now, fix later and ignore. Context: The stylesheet belongs to [site or project] and targets [browsers or devices]. It uses [framework or none], and I want to avoid changing how the page looks. Rules: - Put a message under fix now only when it can change rendering, break a rule in a browser I target, or hide a typo in a property. - Treat vendor prefixes, newer properties and framework output as likely ignore, and say which tool or setting confirms it. - Give a fix of at most 2 lines for every fix now item, and say how to see that nothing moved on the page. - Do not state browser support as fact. Say "check a current support table" where it matters. Result: Three lists headed fix now, fix later and ignore, each item with the line, the reason in one sentence and, for the first list, the fix. Material: [paste the CSS validator messages here]

Updated