body, html {
  padding: 0px;
  margin: 0px;
  font-family: verdana;
}

em {
  font-weight: bold;
  font-style: normal;
}

@media (max-width: 640px) {

#main {
  font-size: 12pt;
  margin: 1em 1.5em 1em 1.5em;
  max-width: 95%;
}

img {
   max-width: 95%;
}

ul.toc-list li {
  padding: 0.3em;
}

.article-link .article-date {
  font-size: 10pt;
}

}

@media (min-width: 640px) {

#main {
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
  font-size: 12pt;
}

ul.toc-list li {
  padding: 0.2em;
}

.article-link .article-date {
  font-size: 10pt;
}

}

#main {
  margin-bottom: 5em;
  line-height: 180%;
}

#main .bookcover {
  display: block;
  text-align: center;
  margin: 1pt;
}

#main .bookcover img {
  border-style: solid;
  border-color: #ccc;
}

#main pre {
  padding: 1em;
  line-height: initial;
  background-color: #eee;
  border-style: dashed;
  border-width: 1px;
  font-family: 'Source Code Pro', monospace;
  overflow: auto;
}

#nav, #footer {
  box-sizing: border-box;
  color: #ccc;
  padding: 1em;
  width: 100%;
  background-color: #333;
  text-align: center;
  font-size: 10pt;
  font-family: monospace;
}

#nav {
  margin: 0px 0px 2em 0px;
}

#footer {
  min-height: 1em;
}

#nav a:link,
#nav a:visited,
#footer a:link,
#footer a:visited {
  color: #ccc;
  text-decoration: none;
}


#main .article-date {
  font-family: 'Vollkorn', serif;
  color: #888;
  font-size: 14pt;
}

ul.toc-list {
  margin: 0px;
  padding-left: 0px;
  list-style-type: none;
  line-height: initial;
}

.article-date a {
  color: inherit;
  text-decoration: none;
}

.article-link {
  font-size: 12pt;
}

.article-link .article-date {
  display: block;
}