body {
color: black; 
background: white;
margin-left: 10%;
margin-right: 10%;
}

h1 {
  align: center;
}

a:link {
  color: #000080;
}

a:visited {
  color: #000080;
}

a:active {
  color: #FF0000;
}

a:hover {
  color: #FF0000;
}