body {
  text-rendering: optimizeLegibility;
}

.book .book-summary {
  font-size: 14px;
}

.book .book-body .page-wrapper .page-inner {
  max-width: 900px;
}

.book .book-body .page-wrapper .page-inner section.normal img {
  display: block;
  margin: 1.5rem auto;
  max-width: 100%;
  height: auto;
}

.book .book-body .page-wrapper .page-inner section.normal h1,
.book .book-body .page-wrapper .page-inner section.normal h2 {
  letter-spacing: 0.01em;
}