Isn't it
<!doctype html> ?
quote:
Understanding how margin and padding are applied/combined helps, and that when you're setting "width" you're controlling the width of the content of that element (not of the element itself).
code:
* {
-moz-box-sizing: border-box;
box-sizing: border-box;
}
Often makes life easier. Obviously can be applied more specifically if needed.
This thing is an example of where border-box can really simplify the HTML.
EDITED: 28 Jun 2012 10:10 by CAER