title: Change div size to scale when window resized
body: <p>Basically, I have a div that contains my entire website. it has a height of <code>625px</code> and a width of <code>1250px</code>. Is there any way to resize this while keeping the scale when the browser window is resized or its used on a mobile/tablet? I know someones gonna say use <code>%</code> instead of <code>px</code> but I have a very controlled UI.</p>
  
  <p>Also is there anyway to bring up a pop up when the websites used in a certain browser?</p>
  
  <p>Thanks</p>