#unsupported {
  border: 1px solid yellow;
  color: black;
  background-color: #FFFFAD;
  padding: 2em;
  margin: 1em;
  display: inline-block;
}

#game {
  background-color: white;
  padding-left: 0;
  padding-right: 0;
  margin-left: auto;
  margin-right: auto;
  display: block;
}

@media screen and (min-width: 0px) {
  #game {
    width: 480px;
    height: 360px;
  }
}

@media screen and (min-width: 800px) {
  #game {
    width: 640px;
    height: 480px;
  }
}

@media screen and (min-width: 1200px) {
  #game {
    width: 800px;
    height: 600px;
  }
}

@media screen and (min-width: 1600px) {
  #game {
    width: 1024px;
    height: 768px;
  }
}