body {
  background-color: #FDF6E3;
  color: #444;
  font-size: 18px;
  line-height: 1.6;
  margin: 40px auto;
  max-width: 650px;
  padding: 0 10px;
}

h1, h2, h3 {
  line-height: 1.2;
  text-align: center;
}

div.body {
  border-top: solid darkgrey 1px;
}

td {
  padding-right: 15px;
  vertical-align: top;
}

.css-serial {
  counter-reset: serial-number;  /* Set the serial number counter to 0 */
}

.css-serial td:first-child:before {
  counter-increment: serial-number;  /* Increment the serial number counter */
  content: counter(serial-number);  /* Display the counter */
}