body
{
  background-color: lightblue
}

h1
{
  color: darkred;
}

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

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