body {
  margin: 1cm;
}

h1,h2,h3,p,td {
    font-family: Arial, Helvetica, sans-serif; 
}

td {
  vertical-align: top;
  padding: 2px; 
  background-color: lightgray;
  
}

#st {
  text-align: right;
  background-color: white;
}

#textbox {
   max-width: 640px;
   min-width: 400px;
   width: expression(document.body.clientWidth > 640? "640px": "auto" );
}

#ctrimg {
   text-align: center;
   font-style: italic; 
   margin: 0px auto;
   padding: 1em;
}