title: Max-height, with Calc vh in Safari
body: <p>For Safari the following is not working, can anyone pinpoint in what I'm doing wrong?</p>
  
  <pre><code>max-height: calc(80vh - 140px);
  </code></pre>
  
  <p>All methods are individually supported on Safari. -webkit-calc doesn't help either.</p>
  
  <p>Thanks!</p>