pre.programlisting {
  background-color: #FFFF99 ;
  border: 1px solid #006600 ;
  width: auto;
  /* float for shrink-to-fit */
  float: left;
  clear: both;
}

body {
  padding: 0 2em;
}

p {
 max-width: 800px;
 clear: both;
}
