The element is removed from the normal document flow, and no space is created
for the element in the page layout. It is positioned relative to its closest
positioned ancestor, if any; otherwise, it is placed relative to the initial
containing block. Its final position is determined by the values of top, right,
bottom, and left.
.element {
position: absolute;
left: 0px;
top: 0px;
right: 0px;
bottom: 0px;
}