body, td {
  font-family: arial, sans-serif;
  font-size: 12px;
}

h1 {
  font-size: 18px;
}
h2 {
  font-size: 16px;
}
h3 {
  font-size: 14px;
}

#product_total {
  font-size: 18px;
  font-weight: bold;
}

.dotline {border-top:1px dotted #ddd;margin:10px 0 10px 0;}