title: Why Does Absolute Positioning Within Container Require Container to be Relative
body: <p>It doesn't make sense to me.</p>
  
  <p>If I want a div to be left:20px;top:20px from the container edge, I should be able to do something like position:absolute-within-parent;. Defining the positioning of a child should not require modification of the parent.</p>
  
  <p>At least it seems more modular and decoupling that way. And as a programmer I've been taught to obsess with that.</p>