:man_facepalming: ```css input.hf_invalid, input:user-invalid ``` will never match in browsers, because it will be ignored due to the second unknown selector. Same problem as with `::-moz-selection, ::selection`. Solution: Double the whole declaration.
🤦♂️
will never match in browsers, because it will be ignored due to the second unknown selector. Same problem as with
::-moz-selection, ::selection.Solution: Double the whole declaration.