h1 {
  text-align: center;
}
p {
  text-align: center;
  margin: 0;
}
#panel {
  width: 100%;
  border-top: 1px solid #000;
  border-left: 1px solid #000;
  border-right: 1px solid #000;
  text-align: center;
  max-width: 420px;
  margin: 0 auto;
}
.linebreak {
  display: inline-block;
  text-decoration: none;
  padding: 6px 10px;
  margin: 2px 0;
  cursor: pointer;
  font-size: 16px;
  color: #fff;
  background: #4F5591;
}
.linebreak:after {
  content: "\f14a";
  font-family: FontAwesome;
  font-size: 14px;
  vertical-align: middle;
}
.linebreak.active:after {
  content: "\f0c8";
  font-family: FontAwesome;
  font-size: 14px;
  vertical-align: middle;
}
.linebreak:hover {
  text-decoration: none;
  background: #949494;
}
.prettyprint {
  font-size: 16px;
  width: 400px;
  max-height: 400px;
  border: 1px solid #000;
  display: block;
  padding: 10px;
  margin: 0 auto;
  overflow-x: hidden;
  overflow-y: auto;
  white-space: pre-wrap;
  word-break: break-all;
}
.prettyprint.active {
  overflow-x: auto;
  white-space: pre;
  word-break: normal;
}