body {background-color:lightseagreen;}
h1 {color:violet; font-family:helvetica;}

#result {
  background-color: white;
}

#container {
  position: fixed;
  top: 50%;
  left: 50%;
  transform:translate(-50%, -55%);
  background-color:purple;
  border-radius: 4%;
  padding: 20px;
}