.page-inner {
  max-width: 980px;
}
.book-summary ul.summary li a {
  white-space: normal;
  line-height: 1.5;
}
.markdown-section h1,
.markdown-section h2,
.markdown-section h3 {
  font-weight: 600;
}
.markdown-section blockquote {
  border-left: 4px solid #2f6fed;
  background: #f7f9ff;
  padding: 10px 14px;
}