The CSS I use for formatting my fiction writing.

book.css

/* CC0 1.0 License (https://creativecommons.org/publicdomain/zero/1.0) */

body {
  margin: auto;
  padding-right: 1em;
  padding-left: 1em;
  max-width: 44em; 
  color: black;
  font-family: Verdana, sans-serif;
  font-size: 100%;
  line-height: 140%;
  color: #333; 
}

h1, h2, h3, h4, h5 { font-family: verdana;
                   font-weight: bold;
                   border-bottom: 1px solid black;
                   color: #704040; }
h1 {
      font-size: 130%;
}

h2 {
      font-size: 110%;
}

h3 {
      font-size: 95%;
}

h4 {
      font-size: 90%;
      font-style: italic;
}

h5 {
      font-size: 90%;
      font-style: italic;
}

h1.title {
      font-size: 200%;
      font-weight: bold;
      padding-top: 0.2em;
      padding-bottom: 0.5em;
      text-align: center;
      border: none;
}

footer {
      padding-top: 1em;
      font-size: 90%;
      color: black;
      text-align: center;
      }