"not" failing matching #css:
label:not([class=custom-control-label]).required:before
@worldsendless Why not label.required:not(.custom-control-label):before?
@tennoseremel right you were! Just get rid of that `class=` nonsense and it worked
@worldsendless class= means that the attribute must match exactly. You probably wanted ~=, although you don't need that with class specifically.
https://developer.mozilla.org/en-US/docs/Web/CSS/Attribute_selectors
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@tennoseremel ah! so it was just missing because it had other classes, too? That makes sense!
@worldsendless Yeah :)