Fine tune the meaning of origin
background-origin

Use this property to fine tune the precise meaning of "origin" as used with the other background properties.
Property values
The origin
of a background-image is its (0,0) point; that is, its top-left corner. This point may be one of these keyword values:
border-box | The origin is the position of the element's top-left border area |
padding-box | The origin is the position of the element's top-left padding area |
content-box | The origin is the position of the element's top-left content area |
Examples
background-origin: content-box;