body {
  margin: 40px auto;
  max-width: 650px;
  line-height: 1.6;
  font-size: 18px;
  color: #444;
  padding: 0 10px;
}

h1, h2, h3 {
  line-height: 1.2;
}

@media (prefers-color-scheme: dark) {
    body {
        color:#c9d1d9;
        background: #0d1117
    }

    a:link {
        color: #58a6ff
    }

    a:visited {
        color: #8e96f0
    }
}