2. Alternative Methods for Z-index and Fixed Positioning Issues
   Understanding the Problem:When you apply both position: fixed; and a z-index to an element in CSS, you might encounter unexpected behavior
3. Understanding Z-Index in HTML and CSS: Stacking Elements Like a Pro
   In CSS, the z-index property controls the stacking order of positioned elements (elements that have their position property set to something other than static). Elements with higher z-index values appear on top of elements with lower values