title: Is there a way to put relationships/contraints into CSS?
body: <p>In every design tool or art principle I've heard of, relationships are a central theme.  By relationships I mean the thing you can do in Adobe Illustrator to specify that the height of one shape is equal to half the height of another.  You cannot express this information in CSS.  CSS hard-codes all values.  Using a language like <a href="http://lesscss.org/" rel="nofollow noreferrer">LESS</a> that allows variables and arithmetic you can get closer to relationships but it's still a CSS variant.</p>
  
  <p>This inability in my mind is the biggest problem with CSS.  CSS is supposed to be a language that describes the visual component of a Web page but it ignores relationships and contraints, ideas that are at the core of art.</p>
  
  <p>How possible is it to imagine a new Web design language that can express relationships and contraints that can be implemented in JavaScript using the current CSS properties?</p>