Defines the floating property. Floating elements create a new flow inside an existing flow.
The properties left and top are equivalent, as as right and bottom. All properties in the specification can be
reduced to either left or right in the computation phase.
Floating images cannot leave their containing block vertically or horizontally. If negative margins are given, they
may be shifted outside the content area, but vertical margins will increase the 'empty-space' between the blocks
instead of messing up the previous element.