a:link    { color:green; }
a:visited { color:cyan;   }
a:hover   { background-color:yellow; }
a:active  { color:red; }

.center {
  margin:auto;
  text-align:center;
}

p {
  display:block;
  margin-bottom:1em;
  margin-left:5px;
  margin-right:5px;
  margin-top:1em;
}

.hbasic {
  margin-bottom:10px;
  margin-top:10px;
  text-align:center;
}

.left     {
  display:block;
  margin-bottom:1em;
  margin-top:1em;
  margin-left:5px;
  margin-right:5px;
  text-align:left;
}