Here\'s a suitable title for your article, formatted as a question: **How to Keep a `::before` Pseudo-Element Behind Its Parent Element When Applying `z-index`?**

Z-Index with pseudo-element ::before

A developer sought help to resolve an issue with z-index positioning and the ::before pseudo-element. Your goal was to keep the pseudo-element behind the parent element while applying a z-index to the parent element.

The ::before pseudo-element is placed inside the header element. The CSS specification states that these pseudo-elements interact like real elements inserted within their associated element.

By setting the z-index for the header element, a new stacking context is created. As a result, the created pseudo-element cannot be floated behind the header element because it would be forced out of that stacking context.

To resolve the issue, it is suggested to place an additional element in front of the header element. This way the overlay succeeds by default.

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