main.book {
  max-width: 820px;
  margin: 0 auto;
  padding: 120px 24px 80px;
  line-height: 1.6;
}

.book-title {
  text-align: center;
  margin-bottom: 40px;
}

.book-title .logo {
  width: 80px;
  height: 80px;
}

.book-title p {
  color: var(--color-info);
}

nav.chapters {
  border: 1px solid var(--color-border);
  border-radius: 6px;
  background-color: var(--color-window);
  padding: 8px 24px 16px;
  margin-bottom: 60px;
}

nav.chapters h2 {
  font-size: 16px;
  text-transform: uppercase;
  letter-spacing: 1px;
}

nav.chapters ol {
  list-style: none;
  padding: 0;
  margin: 0;
  columns: 2;
}

nav.chapters li {
  padding: 2px 0;
}

article.chapter {
  border-top: 1px solid var(--color-border);
  padding-top: 20px;
  margin-bottom: 60px;
}

article.chapter h1,
article.chapter h2,
article.chapter h3 {
  scroll-margin-top: 80px;
}

article.chapter code-example {
  margin: 16px 0;
}

article.chapter p code,
article.chapter li code,
article.chapter td code {
  font-family: var(--font-monospace);
  font-size: 0.9em;
}

article.chapter table {
  margin: 16px 0;
}

@media (max-width: 768px) {
  nav.chapters ol {
    columns: 1;
  }
}