body {
  max-width: 650px;
  margin: 40px auto;
  padding: 0 10px;
  font: 18px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";
  color: #444
}

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
  }
}