#book_switch {
  margin-top: 25px;
}
#book_switch a {
  text-decoration: none;
  margin-right: 15px;
  margin-bottom: 15px;
}

#book_header a {
  font-weight: revert;
}
#book_header img {
  float: left;
  margin-right: 10px;
}

.gpugems_page {
  word-wrap: break-word;
}
.gpugems_page .col-md-4 {
  margin-top: 5em;
}
.gpugems_page .col-md-4 li.active a {
  font-weight: bold;
}
.gpugems_page pre {
  display: block;
  padding: 11.5px;
  margin: 0 0 12px;
  font-size: 15px;
  line-height: 1.5;
  word-break: break-all;
  word-wrap: break-word;
  color: #595959;
  background-color: #f5f5f5;
  border: 1px solid #ccc;
  border-radius: 0px;
  white-space: pre-wrap;
  white-space: -moz-pre-wrap;
  white-space: -o-pre-wrap;
}
.gpugems_page blockquote {
  padding: 10px 20px;
  margin: 0 0 20px;
  font-size: 17.5px;
  border-left: 5px solid #eee;
}
.gpugems_page #book_header {
  border-bottom: 1px solid #ccc;
  padding-bottom: 3em;
  margin-bottom: 1em;
}
.gpugems_page h1.docChapterTitle {
  margin-bottom: 12px;
}