body 
{
  background-color: mediumseagreen
}

h1
{
  color:darkgreen;
}

#result
{background-color:white;
  text-align: center;
}


#container
{
  position:fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background-color: lightgreen;
  border-radius: 5%;
  padding: 20px;
}