body {
  color: black;
  background-color: #e8e8e8;
  font-family: verdana, sans, arial, helvetica, sans-serif;
  margin: 2ex
}

.sig {
 font-size: 70%;
 margin: 2ex;
}

pre {
  background-color: #E0E0E0;
  /* font-family: Fixedsys,Courier; */
  padding:3px;
  /* font-size: small;*/
}
/* the main rectangle for sunray*/
.class3 {
  color: black;
  background-color: #FFF;
  border-color: black;
  border-style: solid;
  border-width: 1px;
  padding: 0ex;
  margin-left: 3ex;
  margin-right: 3ex;
  margin-top: 1ex;
}

.class3 div.main {
  padding: 2ex;
}