html, body {
  height: 100%;
  margin: 0;
  background: #fff;
  color: #000;
  font-family: "Times New Roman", Times, serif;
}

body {
  display: flex;
  align-items: center;
  justify-content: center;
}

main {
  text-align: center;
}

h1 {
  margin: 0;
  font-size: 28pt;
  font-weight: 400;
  line-height: 1.2;
}

h1 a,
h1 a:link,
h1 a:visited,
h1 a:hover,
h1 a:active {
  color: #551a8b;
  text-decoration: underline;
}

.referral {
  margin: 8px 0 0;
  font-size: 12pt;
  color: #999;
}

.mail,
.mail:link,
.mail:visited {
  color: #999;
  text-decoration: underline;
  margin-left: 0.75em;
}

@media (prefers-color-scheme: dark) {
  html, body {
    background: #000;
    color: #fff;
  }
  h1 a,
  h1 a:link,
  h1 a:visited,
  h1 a:hover,
  h1 a:active {
    color: #a672d8;
  }
  .referral,
  .mail,
  .mail:link,
  .mail:visited {
    color: #888;
  }
}