:root {
  --bg: #07060c;
  --bg-2: #100e18;
  --paper: #12101a;
  --paper-edge: #1c1828;
  --ink: #f3ead7;
  --ink-soft: #c9bba0;
  --gold: #d4af37;
  --gold-soft: #c9a227;
  --gold-dim: rgba(212, 175, 55, 0.35);
  --line: rgba(212, 175, 55, 0.18);
  --shadow: rgba(0, 0, 0, 0.55);
  --serif: Georgia, "Times New Roman", serif;
  --display: "Cormorant Garamond", Georgia, serif;
  --sans: "Manrope", system-ui, sans-serif;
  --book-ratio: 148 / 210;
  --body-size: 11.25pt;
  --topbar-h: 56px;
  --bottombar-h: 108px;
  --safe-top: env(safe-area-inset-top, 0px);
  --safe-bottom: env(safe-area-inset-bottom, 0px);
  --safe-left: env(safe-area-inset-left, 0px);
  --safe-right: env(safe-area-inset-right, 0px);
}

* { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

html, body {
  margin: 0;
  min-height: 100%;
  height: 100%;
  background: radial-gradient(1200px 700px at 50% -10%, #1a1430 0%, var(--bg) 55%);
  color: var(--ink);
  font-family: var(--sans);
  overflow: hidden;
}

body {
  display: flex;
  flex-direction: column;
  min-height: 100dvh;
  min-height: 100vh;
  padding:
    var(--safe-top)
    var(--safe-right)
    var(--safe-bottom)
    var(--safe-left);
}

.stars {
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    radial-gradient(1px 1px at 10% 20%, rgba(255,255,255,.45), transparent),
    radial-gradient(1px 1px at 80% 30%, rgba(255,255,255,.35), transparent),
    radial-gradient(1.5px 1.5px at 40% 70%, rgba(212,175,55,.35), transparent),
    radial-gradient(1px 1px at 70% 80%, rgba(255,255,255,.25), transparent),
    radial-gradient(1px 1px at 25% 50%, rgba(255,255,255,.3), transparent);
  opacity: .55;
  z-index: 0;
}

.topbar, .bottombar, .stage, .toc-panel { position: relative; z-index: 2; }

.topbar {
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  min-height: var(--topbar-h);
  padding: 8px 12px 6px;
}

.brand {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  min-width: 0;
  flex: 1;
}
.brand-mark {
  font-family: var(--display);
  letter-spacing: .28em;
  font-size: 14px;
  color: var(--gold);
  font-weight: 500;
}
.brand-sub {
  font-size: 10px;
  color: var(--ink-soft);
  letter-spacing: .1em;
  text-transform: uppercase;
  margin-top: 2px;
}

.icon-btn {
  appearance: none;
  border: 1px solid var(--line);
  background: rgba(18,16,26,.65);
  color: var(--gold);
  width: 42px;
  height: 42px;
  border-radius: 999px;
  display: grid;
  place-items: center;
  cursor: pointer;
  transition: border-color .2s, background .2s, transform .15s;
  flex-shrink: 0;
  -webkit-tap-highlight-color: transparent;
}
.icon-btn:hover { border-color: var(--gold); background: rgba(212,175,55,.08); }
.icon-btn:active { transform: scale(.96); }

.stage {
  flex: 1 1 auto;
  min-height: 0;
  display: grid;
  grid-template-columns: 56px 1fr 56px;
  align-items: stretch;
  gap: 4px;
  padding: 0 8px;
}

.nav-arrow {
  appearance: none;
  border: none;
  background: transparent;
  color: var(--gold);
  font-size: 48px;
  line-height: 1;
  cursor: pointer;
  opacity: .55;
  transition: opacity .2s, transform .15s;
  align-self: center;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
}
.nav-arrow:hover { opacity: 1; }
.nav-arrow:disabled { opacity: .15; cursor: default; }

.book {
  min-height: 0;
  height: 100%;
  display: flex;
  align-items: stretch;
  justify-content: center;
  perspective: 1800px;
}

.page-sheet {
  width: min(720px, 100%);
  height: 100%;
  max-height: 100%;
  aspect-ratio: var(--book-ratio);
  max-width: calc((100dvh - var(--topbar-h) - var(--bottombar-h) - 24px) * var(--book-ratio));
  background:
    linear-gradient(180deg, rgba(255,255,255,.03), transparent 30%),
    linear-gradient(135deg, #16131f 0%, #0e0c14 100%);
  border: 1px solid var(--line);
  border-radius: 18px;
  box-shadow:
    0 30px 80px var(--shadow),
    inset 0 0 0 1px rgba(255,255,255,.03),
    inset 8px 0 24px rgba(0,0,0,.25);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transform-origin: center center;
  transition: transform .45s cubic-bezier(.22,.61,.36,1), opacity .35s ease;
}

.page-sheet.turning-next { animation: turnNext .45s ease; }
.page-sheet.turning-prev { animation: turnPrev .45s ease; }

@keyframes turnNext {
  0% { transform: rotateY(0) scale(1); opacity: 1; }
  45% { transform: rotateY(-8deg) scale(.99); opacity: .9; }
  100% { transform: rotateY(0) scale(1); opacity: 1; }
}
@keyframes turnPrev {
  0% { transform: rotateY(0) scale(1); opacity: 1; }
  45% { transform: rotateY(8deg) scale(.99); opacity: .9; }
  100% { transform: rotateY(0) scale(1); opacity: 1; }
}

.page-content {
  flex: 1 1 auto;
  min-height: 0;
  overflow-x: hidden;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  overscroll-behavior: contain;
  padding: 28px 32px 14px;
  scrollbar-width: thin;
  scrollbar-color: var(--gold-dim) transparent;
  font-size: var(--body-size);
  line-height: 1.62;
  text-rendering: optimizeLegibility;
  font-feature-settings: "kern" 1, "liga" 1;
  hyphens: auto;
  hyphenate-limit-chars: 6 3 3;
}

.page-foot {
  flex: 0 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  padding: 8px 16px 10px;
  border-top: 1px solid var(--line);
  color: var(--ink-soft);
  font-size: 10px;
  letter-spacing: .06em;
  text-transform: uppercase;
}
#page-title {
  flex: 1;
  min-width: 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
#page-num {
  flex-shrink: 0;
  text-align: right;
}
#page-num .print-num {
  color: var(--gold);
  font-weight: 500;
}

.loading {
  height: 100%;
  display: grid;
  place-items: center;
  color: var(--ink-soft);
  font-family: var(--serif);
  font-size: 22px;
}

/* Typography inside pages */
.page-content h1, .page-content h2, .page-content h3 {
  font-family: var(--display);
  font-weight: 500;
  color: var(--gold);
  letter-spacing: .04em;
  margin: 0 0 14px;
  overflow-wrap: anywhere;
  word-break: break-word;
}
.page-content h1 { font-size: clamp(28px, 7vw, 54px); text-align: center; }
.page-content h2 { font-size: clamp(22px, 5vw, 34px); line-height: 1.25; }
.page-content h3 { font-size: clamp(18px, 4vw, 20px); color: var(--ink); }
.page-content h3.cont span { color: var(--ink-soft); font-weight: 400; font-size: .8em; }
.page-content h4 {
  font-family: var(--display);
  color: var(--gold-soft);
  font-weight: 500;
  letter-spacing: .06em;
  font-size: 13px;
  text-transform: uppercase;
  margin: 18px 0 8px;
}
.page-content p {
  font-family: var(--serif);
  font-size: 1em;
  line-height: 1.62;
  color: var(--ink);
  margin: 0 0 0.65em;
  overflow-wrap: anywhere;
  word-break: normal;
  text-align: left;
}
.page-content .lead {
  color: var(--ink-soft);
  font-size: clamp(17px, 4.4vw, 22px);
  font-style: italic;
}
.page-content .gold { color: var(--gold); }
.page-content .eyebrow, .page-content .chapter-label {
  font-family: var(--sans);
  font-size: 10px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--gold-soft);
  margin-bottom: 8px;
}
.page-content .bullet {
  padding-left: 12px;
  border-left: 1px solid var(--gold-dim);
  color: var(--ink-soft);
}
.page-content .q {
  color: var(--gold);
  font-style: italic;
  padding-left: 10px;
  border-left: 2px solid var(--gold-dim);
}
.page-content blockquote {
  margin: 18px 0;
  padding: 6px 0 6px 14px;
  border-left: 2px solid var(--gold);
  font-family: var(--serif);
  font-size: clamp(19px, 4.8vw, 28px);
  line-height: 1.4;
  font-style: italic;
  color: var(--ink);
}
.page-content .sign {
  text-align: right;
  color: var(--gold);
  font-family: var(--display);
  letter-spacing: .06em;
}
.page-content .stats {
  display: grid;
  gap: 8px;
  margin: 20px 0;
  text-align: center;
  font-family: var(--sans);
  font-size: 11px;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--ink-soft);
}
.page-content .footer-line {
  text-align: center;
  letter-spacing: .12em;
  text-transform: uppercase;
  font-size: 11px;
  color: var(--gold);
  margin-top: 20px;
}

/* Cover / image pages */
.page-cover, .page-image {
  min-height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.page-cover img, .page-image img {
  width: 100%;
  max-width: 100%;
  height: auto;
  max-height: min(68vh, 620px);
  object-fit: contain;
  border-radius: 8px;
  display: block;
  margin: 0 auto;
  box-shadow: 0 12px 40px rgba(0,0,0,.35);
}
.page-cover .cover-caption, .page-image .img-caption {
  margin-top: 10px;
  text-align: center;
  font-family: var(--sans);
  font-size: 11px;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--ink-soft);
}

.page-title-block {
  min-height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: center;
  text-align: center;
  padding: 12px 4px;
}

.toc {
  list-style: none;
  padding: 0;
  margin: 8px 0 0;
}
.toc li {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto auto;
  align-items: baseline;
  gap: 0;
  padding: 10px 0;
  border-bottom: 1px solid var(--line);
  cursor: pointer;
  font-family: var(--serif);
  font-size: 17px;
  color: var(--ink);
  transition: color .15s;
  -webkit-tap-highlight-color: transparent;
}
.toc-leader {
  display: block;
  min-width: 16px;
  margin: 0 10px;
  border-bottom: 1px dotted rgba(212, 175, 55, .35);
  transform: translateY(-.35em);
  align-self: end;
}
.toc-page {
  font-family: var(--sans);
  font-size: 15px;
  font-weight: 600;
  color: var(--gold);
  letter-spacing: .02em;
  min-width: 2.5ch;
  text-align: right;
  flex-shrink: 0;
}
.toc li:hover { color: var(--gold); }
.toc li:hover .toc-page { color: #e8c84a; }
.toc li.sub {
  padding-left: 14px;
  font-size: 15px;
  color: var(--ink-soft);
}
.toc li span:first-child {
  min-width: 0;
  overflow-wrap: anywhere;
}
.page-content.page-toc {
  padding: 22px 26px 16px;
}
.page-content.page-toc h2 {
  font-family: var(--display);
  color: var(--gold);
  text-align: center;
  margin: 0 0 16px;
  letter-spacing: .12em;
  font-weight: 500;
}
.toc-cells-title,
.toc-note {
  font-family: var(--sans);
  color: var(--ink-soft);
}
.toc-cells-title {
  margin: 24px 0 8px;
  font-size: 12px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--gold-soft);
}
.toc-note {
  margin-top: 20px;
  font-size: 12px;
  text-align: center;
}
.toc-cells li {
  font-size: 15px;
}
.toc-manuscript .toc-part {
  list-style: none;
  margin-top: 12px;
  font-family: var(--sans);
  font-size: 11px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--gold-soft);
  border-bottom: none;
  cursor: default;
  display: list-item;
}
.toc-manuscript .toc-part-title {
  list-style: none;
  font-family: var(--display);
  font-size: 20px;
  color: var(--gold);
  margin: 4px 0 10px;
  border-bottom: 1px solid var(--line);
  cursor: default;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto auto;
}
.toc-manuscript .toc-dash,
.toc-manuscript .toc-section {
  font-style: italic;
  color: var(--ink-soft);
}
.toc-manuscript .toc-item,
.toc-manuscript .toc-dash,
.toc-manuscript .toc-section {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 8px;
}

/* Side TOC panel */
.toc-panel {
  position: fixed;
  top: 0;
  left: 0;
  width: min(360px, 100vw);
  height: 100dvh;
  height: 100vh;
  background: rgba(10, 8, 16, .98);
  border-right: 1px solid var(--line);
  transform: translateX(-105%);
  transition: transform .3s ease;
  z-index: 20;
  display: flex;
  flex-direction: column;
  backdrop-filter: blur(10px);
  padding-top: var(--safe-top);
  padding-bottom: var(--safe-bottom);
}
.toc-panel.open { transform: translateX(0); }
.toc-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 14px 10px;
  border-bottom: 1px solid var(--line);
}
.toc-head h2 {
  margin: 0;
  font-family: var(--display);
  font-size: 15px;
  letter-spacing: .14em;
  color: var(--gold);
  font-weight: 500;
}
.toc-nav {
  overflow: auto;
  -webkit-overflow-scrolling: touch;
  padding: 8px 8px 24px;
}
.toc-nav button {
  width: 100%;
  text-align: left;
  appearance: none;
  border: none;
  background: transparent;
  color: var(--ink);
  font-family: var(--serif);
  font-size: 17px;
  padding: 12px 12px;
  border-radius: 10px;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 10px;
  align-items: baseline;
}
.toc-btn-page {
  font-family: var(--sans);
  font-size: 14px;
  font-weight: 600;
  color: var(--gold);
  letter-spacing: .02em;
  min-width: 2.5ch;
  text-align: right;
}
.toc-nav button .toc-btn-page:empty::after {
  content: "—";
  opacity: .4;
}
.toc-section-label {
  padding: 16px 12px 6px;
  font-family: var(--sans);
  font-size: 11px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--gold-soft);
}
.toc-nav button:hover, .toc-nav button.active {
  background: rgba(212,175,55,.08);
  color: var(--gold);
}
.toc-nav button.sub { padding-left: 24px; font-size: 15px; color: var(--ink-soft); }
.toc-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.45);
  opacity: 0;
  pointer-events: none;
  transition: opacity .25s;
  z-index: 15;
}
.toc-backdrop.show { opacity: 1; pointer-events: auto; }

.bottombar {
  flex: 0 0 auto;
  padding: 4px 12px 8px;
}

.mobile-nav {
  display: none;
}

#scrubber {
  width: 100%;
  accent-color: var(--gold);
  height: 20px;
  margin: 0;
}

.bottom-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
  margin-top: 4px;
  font-size: 11px;
  color: var(--ink-soft);
  letter-spacing: .04em;
}
#page-title-bottom {
  flex: 1;
  min-width: 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.hint { opacity: .7; white-space: nowrap; }

/* Desktop bottom layout */
@media (min-width: 721px) {
  .bottombar {
    padding: 6px 18px 14px;
  }
  .mobile-nav {
    display: block;
  }
  .mobile-nav-btn {
    display: none;
  }
  .mobile-nav-center {
    width: 100%;
  }
  #progress-label {
    display: inline-block;
    margin-bottom: 4px;
    color: var(--ink-soft);
  }
  #page-title-bottom {
    display: none;
  }
  .bottom-meta .hint {
    display: inline;
  }
}

/* Mobile layout */
@media (max-width: 720px) {
  :root {
    --topbar-h: 88px;
    --bottombar-h: 132px;
    --body-size: 10.75pt;
  }

  .brand-mark {
    letter-spacing: .18em;
    font-size: 13px;
  }

  #btn-fs {
    display: none;
  }

  .stage {
    grid-template-columns: 1fr;
    padding: 0 10px 6px;
    gap: 0;
  }

  .nav-arrow {
    display: none;
  }

  .page-sheet {
    width: 100%;
    border-radius: 14px;
    max-width: 100%;
    aspect-ratio: auto;
    height: 100%;
  }

  .page-content {
    padding: 16px 18px 10px;
  }

  .page-foot {
    padding: 6px 12px 8px;
    font-size: 9px;
  }

  .bottombar {
    padding: 6px 10px 4px;
    border-top: 1px solid var(--line);
    background: rgba(7, 6, 12, .92);
  }

  .mobile-nav {
    display: grid;
    grid-template-columns: 52px 1fr 52px;
    align-items: center;
    gap: 8px;
  }

  .mobile-nav-btn {
    appearance: none;
    border: 1px solid var(--line);
    background: rgba(18,16,26,.85);
    color: var(--gold);
    width: 52px;
    height: 52px;
    border-radius: 14px;
    font-size: 32px;
    line-height: 1;
    display: grid;
    place-items: center;
    cursor: pointer;
    -webkit-tap-highlight-color: transparent;
  }
  .mobile-nav-btn:active {
    transform: scale(.96);
    background: rgba(212,175,55,.1);
  }
  .mobile-nav-btn:disabled {
    opacity: .25;
    cursor: default;
  }

  .mobile-nav-center {
    display: flex;
    flex-direction: column;
    gap: 2px;
    min-width: 0;
  }

  #progress-label {
    text-align: center;
    font-size: 12px;
    color: var(--gold);
    letter-spacing: .08em;
  }

  .bottom-meta {
    margin-top: 6px;
    font-size: 10px;
  }

  .hint {
    display: none;
  }

  .page-cover img, .page-image img {
    max-height: min(58dvh, 58vh, 520px);
  }

  .toc-panel {
    width: 100vw;
    max-width: 100%;
  }

  .page-sheet.turning-next,
  .page-sheet.turning-prev {
    animation: none;
  }
}

@media (max-width: 380px) {
  .brand-sub { display: none; }
  .page-content { padding: 14px 12px 10px; }
  .mobile-nav-btn { width: 46px; height: 46px; font-size: 28px; }
  .mobile-nav { grid-template-columns: 46px 1fr 46px; }
}

@media print {
  body {
    background: #fff;
    color: #111;
    padding: 0;
  }
  .stars, .topbar, .bottombar, .nav-arrow, .mobile-nav, .toc-panel, .toc-backdrop {
    display: none !important;
  }
  .stage {
    display: block;
    height: auto;
    padding: 0;
  }
  .page-sheet {
    width: 148mm;
    min-height: 210mm;
    max-height: none;
    aspect-ratio: auto;
    border: none;
    border-radius: 0;
    box-shadow: none;
    page-break-after: always;
    break-after: page;
    background: #fff;
  }
  .page-content {
    color: #111;
    padding: 18mm 16mm 12mm;
    overflow: visible;
  }
  .page-content h1, .page-content h2, .page-content h3, .page-content h4,
  .page-content .gold, .page-content .q, .toc-page {
    color: #333;
  }
  .page-foot {
    color: #666;
    border-color: #ccc;
  }
}