margin-outside
Syntax
margin-outside:
auto | length | percent
Default
auto
Inherited
No
Comments
The margin-outside property overrides the value of the margin-left property if the element is on a left-facing page and overrides the value of the margin-right property if the element is on a right-facing page. The result is a horizontal margin on the side of the element that is on the "outside" of the two-page spread.