title {
  font-size: 25px;
  background-color: gray;
  color: green;

}
  body {
    font-family: Segoe UI, Ariel, Helvetica, sans-serif;
    font-size: 20px;
  }

  #main {
    background-color: gray;
    border: solid; 
    border-color: black;
  }

  #header1 {
    text-align: center;
  }