How to Eliminate Unexpected Margins Above a Header in HTML and CSS?

Eliminating Unwanted Margins Around Headers

In an attempt to minimize unwanted space above a header, an HTML and CSS snippet has been introduced:

Despite setting the margins of the

and

elements to zero, a non-zero margin still appears. This enigmatic space arises from margin collapsing.

Understanding Margin Collapsing

Margin collapsing occurs when certain elements with adjacent margins collapse into a single margin. This is commonly observed with elements within block-level containers. In this instance, the

and

elements are both block-level elements.

Solution: Applying Margin to Specific Header Element

To eliminate the unwanted margin, apply a margin of zero to the specific header element that is causing the issue. In this case, it is the

element within the header.

By setting the margin-top property of the

element to zero, the margin collapse is broken and the unwanted space above the header is eliminated.

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