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Z-Index

Z-Index is a CSS property that controls the stacking order of elements on a webpage. When elements overlap, the one with a higher z-index value appears in front. It’s essential in creating clean, functional web layouts.

Z-Index plays a crucial role in modern interfaces with overlays, menus, or sticky headers. For instance, dropdown menus must appear above background content to work correctly. Mismanaged z-index values can cause hidden buttons or unreadable layers, frustrating users.

Developers often use structured CSS rules to manage stacking systematically. Though technical, z-index directly impacts UX by controlling how users perceive layered content. Proper use ensures clarity, smooth navigation, and functional interactions without visual clashes or usability issues.

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