Z-index Properties in CSS

The Z-index property is the stacking order in which the elements are set. Elements that have a higher stacking order are always in front of elements with a lower stacking order.
The property value of this property can have negative values;
Description
This property sets the position of an anchor element along the z-axis, which is defined as the axis that extends vertically to the display area. A positive number is closer to the user and a negative number means farther away from the user.
All browsers support Z-index properties;