CSS Box Model

This test checks the browser conformance regarding the CSS box model.

• A width/height of 100% means the width/height of the offset parent (including its border and padding, excluding its margin).
• The width/height specification defines the dimension of the element contents (excluding its border and margin). In other words, the border is drawn around the content area of the specified size.
• The position (top: 0px; left: 0px) is at the top left corner of the offset parent within (excluding) it's border. At that position starts the margin of the positioned element.