a:link, a:visited {
  color: #005386;
}

ul a {
  text-decoration: none;
}

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

img {
  max-width:100%;
  display: block;
  margin: 0 auto;
}

@media (prefers-color-scheme: dark) {
  body {
    color: #ffffff;
    background: #212121;
    margin:40px auto;
    max-width:650px;
    line-height:1.6;
    font-size:18px;
    padding:0 10px
  }

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

  a:link, a:visited {
    color: #58a6ff;
  }
  
  ul a {
    text-decoration: none;
  }

  ul a:visited {
    text-decoration: none;
    color: #8e96f0;
  }
}