a:link {
  color: black;
}
a:visited {
  color: grey;
}
a:hover {
  color: red;
}
a:active {
  color: red;
}
div {
  text-align: justify;
}
.center {
  display: block;
  margin-left: auto;
  margin-right: auto;
  width: 550px;
}
:root > * {
  --md-footer-bg-color: #4a5ed4;
}
.md-typeset a:not(.md-icon) {
  &[href^="//"]::after,
  &[href^="http://"]::after,
  &[href^="https://"]::after {
      content: "↗";
      font-size: smaller;
      margin-left: .2em;
      vertical-align: top;
  }
}