/* This CSS is to simulate how a 4:3 aspect ratio looks. */


html {
  background: gray;
  height:100%;
  
  display:flex;
  justify-content:center;
  align-content:center;
}

main {
  width: 1024px;
  height: 768px;
  
  background-color: white;
  border: 7px outset lightgray;
  
  padding:10px; 
}