This is the one I've used the most and I want to try others, so I need to save this one someplace.

```css
@import url(https://fonts.googleapis.com/css?family=Bitter);
@import url(https://fonts.googleapis.com/css?family=Ubuntu+Mono);

body.calibre-viewer-paginated { 
  font-family: "Bitter", "Ubuntu Mono" !important;
  font-size: 100%;
  text-indent: 2em !important;
  line-height: 150% !important;
  padding: 10px;
  word-wrap: break-word;
 }

p, p.footnote { 
  font-family: "Bitter", "Ubuntu Mono" !important;
  font-size: 100%;
  word-wrap: break-word;
 }

strong, emi, i {
  color: #ffffcc;
}

h1, h2, h3, h4, h5, h6 {
  font-family: "Bitter", serif;
  font-weight: 600;
  line-height: 150% !important;
  text-align: left;
  color: #ffcc00;
}

span {display: inline;}

img {max-width: 100%;}

hr {border: 2px solid; border-radius: 2px;}
```