Utility classes for commonly used absolute-positioned elements.
.absolute-spread to create an element with
position: absolute that spreads across the width of the parent element, is positioned in the uppermost left corner and has an automatic
.absolute-fill to create an element with
position: absolute that spreads across the width and height of the parent element, and has
z-index: -1 to position it behind the parent element. Useful for placing content behind other content.