style.css

body {
  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;
  padding-left: 5%;
}

h1 {
  color: #c9d1d9;
}

p {
  color: white;
}

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

  a:link {
    color: #58a6ff;
  }

  a:visited {
    color: #8e96f0;
  }
}