h1 {color:firebrick;}

div{
  color: firebrick;
  font-size: 2.1em;
  border: solid 2px dodgerblue;
  background-color: dodgerblue;
  text-align: center;
   text-decoration-style: wavy;
}

#birthday{
  background-color: darkred;
  font-size: 1em;
  color: white;
  padding: 1.1em;
  margin-bottom: 2.1em;
}


#birthday{
  font-weight: bolder;
}