blockquote {
  font-style: italic;
  margin-left: 2em;
  margin-right: 2em;
}
h1, h2, h3, h4, .center {
  text-align: center;
}
sup {
  line-height: 0;
}
.left {
  text-align: left;
}
.right {
  text-align: right;
}