h1, h2 { 
 text-align: center; 
}

body { 
  padding: 1%;
  color: #000000;
  background-color: #ffffff;
  background-image: none;
}

.main-title {  
  text-align: center;
  float: none;
}

em { 
  font-weight: bolder;
 }

a, p, li, h1, h2, h3, pre { 
 }

a:visited { 
  text-decoration: line-through; /* Blog-like :-) */
 }

a:active { 
  font-size: 100%;  
 }

code { 
  font-size: 130%;
 }