style.css

body, td {
    font-family: sans-serif;
    background-color: white;
    font-size: 13px; /* Default 13px; was set to 20px for presentation with a beamer*/
  }

body {
  /* max-width: 1200px; */
  margin: auto;
  padding: 1em;
  line-height: 1.538em; /* 1.538 = 20/13, results from default line-height 20px with default font-size 13px */
}

p {
  padding-top: .5em;
}

tt, code, pre {
  font-family: 'DejaVu Sans Mono', 'Droid Sans Mono', 'Lucida Console', Consolas, Monaco, monospace;
}

/* 
Font size units 'em' are proportions of base font size, i.e. body font size or, if body font size has not
been set, browser default. See: https://css-tricks.com/css-font-size/
That means the 'h_' scale with the body font-size set above.
*/
h1 {
  font-size:2.2em;
  line-height:1.2em;
}

h2 {
  font-size:1.8em;
}

h3 {
  font-size:1.4em;
}

h4 {
  font-size:1.0em;
}

h5 {
  font-size:0.9em;
}

h6 {
  font-size:0.8em;
}

a:visited {
  color: rgb(50%, 0%, 50%);
}

/* outcommented by christoph to show large images/plots in their original size
pre, img {
  max-width: 100%;
} */
pre {
  overflow-x: auto;
}
pre code {
  /* display: block; padding: 0.5em; */
  display: block; padding: 0;
  /* to get scroll bar */
  /* from https://stackoverflow.com/questions/36845178/width-of-r-code-chunk-output-in-rmarkdown-files-knitr-ed-to-html */
  word-wrap: normal;
  white-space: pre;
}

code {
  font-size: 92%;
  /* border: 1px solid #ccc; */
  border: 0 solid;
}

code[class] {
  background-color: #E8E8E8;
}

table, td, th {
  border: none;
  padding-left: 10px;
}
}

blockquote {
  color:#666666;
    margin:0;
  padding-left: 1em;
  border-left: 0.5em #EEE solid;
}

hr {
  height: 0px;
  border-bottom: none;
  border-top-width: thin;
  border-top-style: dotted;
  border-top-color: #999999;
}

/* formatting for automatically created table of contents */
/* btw, only java-script type of comments work in CSS style specifications */
.table-of-contents {
  float: left;
  width: 20%;
  background: #eee;
  font-size: 1em; /* 'line-height' seems to not have an effect here. */
  padding: 1em 2em;
  margin: 0 0 0em 0em;
  position: fixed;
  right: 0; /* ensures that table of contents is to the right! :-). Actually, with "right: 0" the table is to the left ;-) */
}
.table-of-contents ul {
  padding: 0;
  list-style-type: none;
}
.table-of-contents li {
  margin: 0 0 0.25em 0;
}
.table-of-contents a {
  text-decoration: none;
}
.table-of-contents a:hover,
.table-of-contents a:active {
  text-decoration: underline;
}

@media print {
  * {
    background: transparent !important;
    color: black !important;
    filter:none !important;
    -ms-filter: none !important;
  }
  
  body {
    font-size:12pt;
    max-width:100%;
  }
  
  a, a:visited {
    text-decoration: underline;
  }
  
  hr {
    visibility: hidden;
    page-break-before: always;
  }
  
  pre, blockquote {
    padding-right: 1em;
    page-break-inside: avoid;
  }
  
  tr, img {
    page-break-inside: avoid;
  }
  
  img {
    max-width: 100% !important;
  }
  
  @page :left {
    margin: 15mm 20mm 15mm 10mm;
  }
  
  @page :right {
    margin: 15mm 10mm 15mm 20mm;
  }
  
  p, h2, h3 {
    orphans: 3; widows: 3;
  }
  
  h2, h3 {
    page-break-after: avoid;
  }
}