ndation to use relative measurements in CSS layouts helps to ensure that authors do not set column widths in such a way that makes it impossible for users to view content with line lengths of 80 characters or less. </p>
   </section><section class="examples"><h2>Examples</h2>
      <section class="example">
         <section class="description"><h2>Description</h2>
            <p>In this example the div width is set in ems in the stylesheet.</p>
            <div class="note">
               <p>The CSS prope