body{font-family:Arial,Helvetica,sans-serif;
    margin:20px;
    line-height:1.5;
     background-color: cornflowerblue;

}
header h1{margin:0}
nav{
    margin-top:8px;
  border-bottom: 5px;
  background-color: grey;
  color: darkblue;
  margin-left: 30%;
  margin-right: 30%;
}