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

h1 {
margin-left: -8%;
}

h2, h3, h4, h5, h6 {
margin-left: -4%;
}

h3 {
color: #FF0000;
}

a:link {
  color: #000080;
}

a:visited {
  color: #000080;
}

a:active {
  color: #FF0000;
}

a:hover {
  color: #FF0000;
}

div.highlight {
  background: #FFFF00;
  padding: 0.5em;
  border: none;
}