title: CSS - div height calculation without "calc"
body: <p>In my website, I am using two divs that should have their <code>height</code> like <a href="http://i.imgur.com/gtR8atO.png" rel="nofollow">in this picture</a>.</p>
  
  <p>So, there is a <code>div</code> with <code>height:90px;</code> that is aligned to the bottom of the window, now what can I do if I want the 2nd div (red) to "fill" the rest of the window? Red <code>div</code> should have the <code>height</code> of the window minus the <code>height</code> of the blue <code>div</code> but something like <code>calc(100vh - 90px)</code> wouldn't work, right?</p>
  
  <p>Thanks!</p>