body { 
  font-family: Arial, Verdana, Helvetica, sans-serif;
  font-size: 62.5%;
}
footer, header {
  background-color: papayawhip;
  border: 1px solid black;
  padding: 2%;
  text-align:center;
  font-size: 2.0em;
} 
article {
  font-family: Georgia, Times, serif;
  font-size: 1.8em;
 }
.p-75 { line-height: 75%; }
.p-100 { line-height: 100%; }
.p-150 { line-height: 150%; }