/* ==========================================================================
   Book pages — the long-form translation reading experience
   Same paper/ink/vermillion palette and Fraunces/Petrona pairing as the
   home page, essays, and conversations. Loaded only for `layout: book`
   pages, which skip Tufte CSS entirely, so plain element selectors here
   own the page.
   ========================================================================== */

body {
  --color-paper: #f6f1e6;
  --color-paper-deep: #efe8d9;
  --color-ink: #211d16;
  --color-light-ink: rgba(33, 29, 22, 0.72);
  --color-accent: #99502e;
  --color-hairline: rgba(33, 29, 22, 0.18);
  --font-body: 'Petrona', Georgia, serif;
  --font-display: 'Fraunces', Georgia, serif;

  margin: 0;
  padding: 0;
  font-family: var(--font-body);
  background-color: var(--color-paper);
  background-image: radial-gradient(90rem 50rem at 50% -12rem, rgba(255, 253, 244, 0.9) 0%, rgba(255, 253, 244, 0) 65%);
  color: var(--color-ink);
  line-height: 1.6;
  position: relative;
}

@media (prefers-color-scheme: dark) {
  body {
    --color-paper: #191611;
    --color-paper-deep: #14110d;
    --color-ink: #ece5d6;
    --color-light-ink: rgba(236, 229, 214, 0.72);
    --color-accent: #cf8d5f;
    --color-hairline: rgba(236, 229, 214, 0.2);
    background-image: radial-gradient(90rem 50rem at 50% -12rem, rgba(46, 40, 30, 0.85) 0%, rgba(46, 40, 30, 0) 65%);
  }

  nav.site-nav a.site-nav-home {
    color: #a89f91;
  }

  nav.site-nav a.site-nav-home:hover,
  nav.site-nav a.site-nav-home:focus {
    color: #f0ebe0;
  }
}

/* Paper grain, matching the rest of the site */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  opacity: 0.4;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='240' height='240'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3C/filter%3E%3Crect width='240' height='240' filter='url(%23n)' opacity='0.3'/%3E%3C/svg%3E");
}

.book-page {
  position: relative;
  z-index: 1;
  max-width: 42rem;
  margin: 0 auto;
  padding: 6rem 1.5rem 4rem;
}

/* --------------------------------------------------------------------------
   Header
   -------------------------------------------------------------------------- */

.book-header {
  text-align: center;
  margin-bottom: 4.5rem;
}

.book-title {
  margin: 0 0 1.4rem;
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(2.1rem, 5.5vw, 3.1rem);
  line-height: 1.18;
  text-wrap: balance;
}

.book-deck {
  margin: 0 auto 2.2rem;
  max-width: 32em;
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 300;
  font-size: 1.2rem;
  line-height: 1.6;
  color: var(--color-light-ink);
  text-wrap: balance;
}

.book-byline {
  display: flex;
  align-items: center;
  gap: 1.2rem;
  max-width: 26rem;
  margin: 0 auto;
}

.book-byline .rule {
  flex: 1;
  height: 1px;
  background: var(--color-hairline);
}

.book-byline .name {
  font-size: 0.85rem;
  letter-spacing: 0.06em;
  color: var(--color-accent);
}

/* --------------------------------------------------------------------------
   Introduction — matches the foreword box on essay and conversation pages
   -------------------------------------------------------------------------- */

.book-page .foreword {
  background-color: var(--color-paper-deep);
  border: 1px solid var(--color-hairline);
  border-radius: 3px;
  padding: 2rem 2.2rem;
  margin-bottom: 3.6rem;
}

.book-page .foreword-label {
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-light-ink);
  margin-bottom: 1.2rem;
}

.book-page .foreword p {
  font-size: 1rem;
  line-height: 1.7;
  margin: 0 0 1.1rem;
  color: var(--color-ink);
}

.book-page .foreword p:last-child {
  margin-bottom: 0;
}

.book-page .foreword em {
  color: var(--color-light-ink);
}

.book-page .foreword a {
  color: var(--color-ink);
  text-decoration: underline;
  text-decoration-color: var(--color-hairline);
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;
}

.book-page .foreword a:hover,
.book-page .foreword a:focus {
  color: var(--color-accent);
  text-decoration-color: var(--color-accent);
}

/* --------------------------------------------------------------------------
   Contents — nine chapter cards on a hairline grid, engraved-table style
   -------------------------------------------------------------------------- */

.book-contents {
  margin: 0 0 4.5rem;
}

.book-contents-label {
  display: flex;
  align-items: center;
  gap: 1.2rem;
  max-width: 26rem;
  margin: 0 auto 2rem;
}

.book-contents-label .rule {
  flex: 1;
  height: 1px;
  background: var(--color-hairline);
}

.book-contents-label .text {
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-light-ink);
}

.contents-grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--color-hairline);
  border: 1px solid var(--color-hairline);
  border-radius: 3px;
  overflow: hidden;
}

.contents-chapter {
  background: var(--color-paper);
  padding: 1.4rem 1.3rem 1.5rem;
}

.contents-chapter-link {
  display: block;
  text-decoration: none;
}

.contents-kicker {
  display: block;
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 0.35rem;
}

.contents-passion {
  display: block;
  font-family: var(--font-display);
  font-weight: 400;
  font-size: 1.5rem;
  line-height: 1.15;
  color: var(--color-ink);
}

.contents-chapter-link:hover .contents-passion,
.contents-chapter-link:focus .contents-passion {
  color: var(--color-accent);
}

.contents-subtypes {
  list-style: none;
  margin: 1rem 0 0;
  padding: 0.9rem 0 0;
  border-top: 1px solid var(--color-hairline);
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
}

.contents-subtypes a {
  display: block;
  text-decoration: none;
  font-size: 0.88rem;
  line-height: 1.45;
  color: var(--color-light-ink);
}

.contents-instinct {
  display: block;
  font-size: 0.62rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-light-ink);
  opacity: 0.75;
}

.contents-epithet {
  font-style: italic;
  color: var(--color-ink);
}

.contents-subtypes a:hover .contents-epithet,
.contents-subtypes a:focus .contents-epithet {
  color: var(--color-accent);
}

/* --------------------------------------------------------------------------
   Body copy
   -------------------------------------------------------------------------- */

.book-body p {
  margin: 0 0 1.45em;
  font-size: 1.08rem;
  line-height: 1.8;
}

.book-body a {
  color: var(--color-accent);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

.book-body ul,
.book-body ol {
  margin: 0 0 1.45em;
  padding-left: 1.4em;
}

.book-body li {
  margin-bottom: 0.5em;
  font-size: 1.08rem;
  line-height: 1.8;
}

.book-body li::marker {
  color: var(--color-accent);
}

.book-body blockquote {
  margin: 2rem 0;
  padding: 0 0 0 1.4rem;
  border-left: 2px solid var(--color-hairline);
  color: var(--color-light-ink);
  font-style: italic;
}

/* Section breaks: a plain `---` in the markdown becomes an ornament */
.book-body hr {
  border: none;
  margin: 3.2rem 0;
  text-align: center;
}

.book-body hr::after {
  content: "\2756";
  font-size: 0.75rem;
  color: var(--color-accent);
}

/* --------------------------------------------------------------------------
   Chapter openers — "Type One" kicker over the passion in display type
   -------------------------------------------------------------------------- */

.book-body .chapter-heading {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
  margin: 5.5rem 0 2.4rem;
  text-align: center;
  font-weight: 400;
  scroll-margin-top: 2rem;
}

.book-body .chapter-heading::before {
  content: "\2756";
  font-size: 0.8rem;
  color: var(--color-accent);
  margin-bottom: 0.5rem;
}

.chapter-kicker {
  font-family: var(--font-body);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--color-accent);
}

.chapter-passion {
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 2.7rem);
  line-height: 1.1;
}

/* Chapters open with a drop cap, like the essays */
.book-body .chapter-heading + p::first-letter {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: 3.6em;
  float: left;
  line-height: 0.8;
  padding: 0.08em 0.12em 0 0;
  color: var(--color-accent);
}

/* --------------------------------------------------------------------------
   Subtype openers — "The Social One" kicker over the epithet
   -------------------------------------------------------------------------- */

.book-body .subtype-heading {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  margin: 4rem 0 1.8rem;
  text-align: center;
  font-weight: 400;
  scroll-margin-top: 2rem;
}

.subtype-kicker {
  font-family: var(--font-body);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-light-ink);
}

.subtype-passion {
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 300;
  font-size: 1.7rem;
  line-height: 1.2;
}

/* --------------------------------------------------------------------------
   Section labels — bold-only lead lines within a testimony
   -------------------------------------------------------------------------- */

.book-body .book-label {
  margin: 2.4em 0 0.9em;
}

.book-body .book-label strong {
  font-family: var(--font-body);
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-accent);
}

.book-body .book-label + .book-label {
  margin-top: 0;
}

/* --------------------------------------------------------------------------
   Colophon
   -------------------------------------------------------------------------- */

.book-colophon {
  margin-top: 5rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.book-ornament {
  display: flex;
  align-items: center;
  gap: 1rem;
  width: min(100%, 16rem);
  margin-bottom: 1.4rem;
  color: var(--color-accent);
}

.book-ornament .rule {
  flex: 1;
  height: 1px;
  background: var(--color-hairline);
}

.book-ornament .mark {
  font-size: 0.7rem;
  line-height: 1;
}

.book-contributors {
  margin: 0 0 1.2rem;
  max-width: 34em;
  font-size: 0.85rem;
  font-style: italic;
  line-height: 1.7;
  color: var(--color-light-ink);
}

.book-colophon > p:last-child {
  margin: 0;
  font-size: 0.85rem;
  letter-spacing: 0.05em;
  color: var(--color-light-ink);
}

/* --------------------------------------------------------------------------
   Waypoint — floating current-chapter marker with a way back to contents
   -------------------------------------------------------------------------- */

.book-waypoint {
  position: fixed;
  left: 50%;
  bottom: 1.1rem;
  transform: translateX(-50%) translateY(0.4rem);
  z-index: 20;
  display: flex;
  align-items: center;
  gap: 0.7rem;
  padding: 0.55rem 1.1rem;
  background-color: var(--color-paper-deep);
  border: 1px solid var(--color-hairline);
  border-radius: 999px;
  box-shadow: 0 6px 24px rgba(33, 29, 22, 0.12);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.35s ease, transform 0.35s ease, visibility 0.35s;
  white-space: nowrap;
}

.book-waypoint.visible {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

.book-waypoint a {
  text-decoration: none;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.book-waypoint .waypoint-contents {
  color: var(--color-light-ink);
}

.book-waypoint .waypoint-contents:hover,
.book-waypoint .waypoint-contents:focus {
  color: var(--color-accent);
}

.book-waypoint .waypoint-chapter {
  color: var(--color-accent);
}

.book-waypoint .waypoint-sep {
  font-size: 0.5rem;
  color: var(--color-accent);
  opacity: 0.7;
}

@media (prefers-reduced-motion: reduce) {
  .book-waypoint {
    transition: none;
  }
}

/* --------------------------------------------------------------------------
   Small screens
   -------------------------------------------------------------------------- */

@media (max-width: 700px) {
  .book-page {
    padding-top: 5rem;
  }

  .book-header {
    margin-bottom: 3.2rem;
  }

  .contents-grid {
    grid-template-columns: 1fr;
  }

  .book-page .foreword {
    padding: 1.4rem 1.3rem;
  }

  .book-body p,
  .book-body li {
    font-size: 1.02rem;
  }
}