body {
  padding: 0 5em;
}
h1 {
  background-color: #505050;
  color: white;
  padding: 2em;
}
h2 {
  padding-left: 0.3em;
  color: #505050;
  border-bottom: 1px solid #505050;
}
h3 {
  padding-left: 0.3em;
  border-left: 0.5em solid #a0a0a0;
}
.strong01 {
  padding: 1em 0 1em 1em;
  background-color: red;
  font-size: 2em;
  text-decoration: underline;
  color: white;
}
.strong02 {
  font-size: 1.5em;
  font-weight: bold;
  color: red;
}
.strong03 {
  text-decoration: underline;
}
.highlight-block {
  padding: 1em 0 1em 1em;
  background-color: #a0a0a0;
  color: white;
}
.footnote-area {
  padding: 1em 0 1em 1em;  
}
.footer-highlight-block {
  padding: 1em 0;
  background-color: #f1f1f1;
}
.footer {
  text-align: center;
}