what is z index in css and it's use?
The `z-index` property in CSS controls the stacking order of positioned elements along the z-axis (depth) within a document. It determines which elements appear in front of or behind others when they overlap in a layout. Elements with a higher `z-index` value appear in front of elements with lower values.
This property is particularly useful when dealing with layered elements, such as positioned elements or elements with relative or absolute positioning. By adjusting the `z-index` values, you can control the visual hierarchy, ensuring specific elements are positioned above or below others on the screen.
1. #CSSZIndex
2. #WebDesignLayers
3. #FrontEndDevelopment
4. #CSSPositioning
5. #VisualHierarchy