The Cascade Is a Series of Elimination Gates: Follow origin, importance, @layer order, specificity, and source order through a real CSS conflict to see why most cascade disputes are decided long before specificity matters.
Thursday's piece described the order the browser resolves conflicting CSS in: origin and importance first, then layer order, then specificity, then source order, with inheritance underneath all of it. Describing an order is one thing. Watching it actually run, on a real conflict, is another. This is that.
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The Setup
One button. Six declarations, all fighting over the same property, spanning every stage of the resolution sequence:
/* UA stylesheet — browser default */
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