.chapter-subtitle {
  margin-block-end: 1.5em;
  font-size: 1.08em;
  color: var(--icons);
}

.chapter-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4em 1.25em;
  margin-block: 1.5em 3em;
  padding-block: 0.75em;
  border-block: 1px solid var(--table-border-color);
  color: var(--icons);
  font-size: 0.8em;
}

.chapter-meta span:not(:last-child) {
  padding-inline-end: 1.25em;
  border-inline-end: 1px solid var(--table-border-color);
}

.content main { text-wrap: pretty; }

.book-hero {
  margin: 0 0 2.75rem;
  padding: 3.4rem 3rem 3rem;
  border: 1px solid var(--table-border-color);
  border-top: 0.4rem solid #bb4d00;
  background:
    linear-gradient(135deg, rgba(187, 77, 0, 0.09), transparent 42%),
    var(--quote-bg);
}

.book-hero h1 {
  margin: 0.1em 0 0;
  border: 0;
  font-size: clamp(3rem, 8vw, 5.8rem);
  line-height: 0.95;
  letter-spacing: -0.055em;
}

.book-kicker {
  margin: 0;
  color: #bb4d00;
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.16em;
}

.book-deck {
  max-width: 30em;
  margin: 1.25rem 0 2.5rem;
  font-size: 1.3rem;
  line-height: 1.35;
}

.book-thesis {
  max-width: 37em;
  margin: 0;
  padding-top: 1.25rem;
  border-top: 1px solid var(--table-border-color);
  font-family: Georgia, "Times New Roman", serif;
  font-size: 1.12rem;
  font-style: italic;
}

.book-byline {
  margin: 1.5rem 0 0;
  color: var(--icons);
  font-size: 0.85rem;
}

.front-matter-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.5rem;
  margin: 2.5rem 0;
}

.front-matter-grid > div {
  padding: 0.25rem 1.25rem 0.35rem;
  border-left: 3px solid #bb4d00;
}

.front-matter-grid h3 { margin-top: 0; }

.front-cta {
  margin: 3rem 0 1rem;
  padding: 1.5rem 1.75rem;
  border: 1px solid var(--table-border-color);
  background: var(--quote-bg);
}

.front-cta h3 { margin-top: 0; }

@media only screen and (min-width: 801px) {
  .nav-wide-wrapper,
  #mdbook-sidebar-toggle-anchor:checked ~ .page-wrapper .nav-wide-wrapper { display: block; }
  .nav-wrapper,
  #mdbook-sidebar-toggle-anchor:checked ~ .page-wrapper .nav-wrapper { display: none; }
  .nav-chapters {
    top: var(--menu-bar-height);
    bottom: 0;
    min-width: 90px;
    height: auto;
    border-radius: 0;
  }
}

@media (max-width: 700px) {
  .chapter-meta span { border-inline-end: 0 !important; }
  .book-hero { padding: 2.25rem 1.5rem 2rem; }
  .front-matter-grid { grid-template-columns: 1fr; }
}