body { 
  padding: 1%;
  color: #000000;
  background-color: #00FFFF;
  background-image: none;
}

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

em { 
  font-weight: bolder;
 }

h2 { 
    text-align: center;    
}

a:visited { 
 /* text-decoration: line-through;  Blog-like :-) but many people do not like */
 }

code { 
  font-size: 130%;
 }

#headline { 
   margin-left: 2%;
   font-size: 140%;
   font-weight: bolder;
}

table {
    border-collapse: collapse; 
    border: 0.1em solid; 
}

table tr td { 
    border: 0.1em solid; 
    padding: 0.25em;
}