body {
  margin:0;
  padding:20px 10px;
  background:#efefef;
}

#a {
#  font-weight : bold;
#}
a:link,visited {
text-decoration: none;
}
a:hover {
text-decoration: underline;
}

.main {
  width:640px;
  text-align:left;
  background:#fff;
#  margin:15px 0 0;
  padding:20px;
  color:#000;
  line-height:1.35em;
}
.callout {
  width:480px;
  text-align:left;
  background:#ffa;
  padding:10px;
}
.intro {
  font-size:1.2em;
  text-align: justify;
  text-justify: inter-word;
}