/* ── The Fifth Dimension — site type & layout overrides ──────────────── */

:root {
  --fd-bg: #F4F1EC;            /* warm paper */
  --fd-paper: #FBFAF7;
  --fd-ink: #15140F;
  --fd-ink-soft: #4A4742;
  --fd-ink-faint: #8A8780;
  --fd-line: #E4DFD3;
  --fd-line-soft: #EEEAE0;
  --fd-rule: #1A1A1A;
  --fd-gold: #A88658;
  --fd-gold-soft: #EFE6D2;
  --fd-navy: #1E2A44;
  --fd-accent: #2F4A3A;        /* deep sage */
  --fd-blue: #2C5A8A;
  --fd-quote-bg: #F0EBDD;

  --fd-serif-display: 'Fraunces', 'Source Serif 4', Georgia, serif;
  --fd-serif-body: 'Source Serif 4', 'Fraunces', Georgia, serif;
  --fd-mono: 'Geist Mono', 'SF Mono', ui-monospace, Menlo, monospace;
  --fd-ui: 'Inter', system-ui, -apple-system, sans-serif;
  --fd-han: 'Noto Serif SC', 'Source Han Serif SC', 'Songti SC', serif;

  --fd-col: 660px;
  --fd-col-wide: 1140px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  background: var(--fd-bg);
  color: var(--fd-ink);
  font-family: var(--fd-serif-body);
  font-size: 18px;
  line-height: 1.62;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

::selection { background: var(--fd-gold-soft); color: var(--fd-ink); }

a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: none; cursor: pointer; padding: 0; }

/* ── Typography primitives ───────────────────────────────────────────── */

.eyebrow {
  font-family: var(--fd-mono);
  font-size: 10.5px;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--fd-ink-faint);
}

.eyebrow-dark { color: var(--fd-ink-soft); }

.display-xl {
  font-family: var(--fd-serif-display);
  font-weight: 360;
  font-variation-settings: "opsz" 144, "SOFT" 30;
  font-size: clamp(56px, 8.5vw, 132px);
  line-height: 0.92;
  letter-spacing: -0.025em;
  color: var(--fd-ink);
}

.display-lg {
  font-family: var(--fd-serif-display);
  font-weight: 400;
  font-variation-settings: "opsz" 144, "SOFT" 30;
  font-size: clamp(40px, 5vw, 72px);
  line-height: 1.02;
  letter-spacing: -0.02em;
  color: var(--fd-ink);
}

.display-md {
  font-family: var(--fd-serif-display);
  font-weight: 420;
  font-variation-settings: "opsz" 96, "SOFT" 40;
  font-size: clamp(32px, 3.5vw, 48px);
  line-height: 1.06;
  letter-spacing: -0.015em;
  color: var(--fd-ink);
}

.display-sm {
  font-family: var(--fd-serif-display);
  font-weight: 460;
  font-variation-settings: "opsz" 60;
  font-size: 28px;
  line-height: 1.14;
  letter-spacing: -0.01em;
  color: var(--fd-ink);
}

.title-italic {
  font-family: var(--fd-serif-display);
  font-style: italic;
  font-weight: 400;
}

.body-lead {
  font-family: var(--fd-serif-body);
  font-weight: 380;
  font-size: 22px;
  line-height: 1.5;
  color: var(--fd-ink-soft);
  letter-spacing: -0.002em;
}

.body-prose {
  font-family: var(--fd-serif-body);
  font-weight: 400;
  font-size: 19px;
  line-height: 1.72;
  color: var(--fd-ink);
}

.body-prose p + p { margin-top: 1.1em; }

.body-prose em { font-style: italic; }
.body-prose strong { font-weight: 600; }

.body-small {
  font-family: var(--fd-serif-body);
  font-size: 15px;
  line-height: 1.55;
  color: var(--fd-ink-soft);
}

.han { font-family: var(--fd-han); font-weight: 500; }

.ui-link {
  font-family: var(--fd-ui);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.01em;
  color: var(--fd-ink);
  transition: color .2s;
}

.ui-link:hover { color: var(--fd-blue); }

.ui-link-mono {
  font-family: var(--fd-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

/* ── Frame & shell ───────────────────────────────────────────────────── */

.shell {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 40;
  background: rgba(244,241,236,0.82);
  backdrop-filter: saturate(1.1) blur(14px);
  -webkit-backdrop-filter: saturate(1.1) blur(14px);
  border-bottom: 1px solid var(--fd-line);
}

.topbar-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 14px 36px;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 24px;
}

.wordmark {
  display: flex;
  align-items: center;
  gap: 10px;
}

.wordmark-dot {
  width: 8px; height: 8px;
  background: var(--fd-blue);
  border-radius: 999px;
}

.wordmark-text {
  font-family: var(--fd-serif-display);
  font-weight: 460;
  font-variation-settings: "opsz" 60;
  font-size: 18px;
  letter-spacing: -0.01em;
}

.wordmark-text .small {
  font-family: var(--fd-mono);
  font-weight: 500;
  font-size: 10px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--fd-ink-faint);
  margin-left: 8px;
}

.nav {
  display: flex;
  align-items: center;
  gap: 28px;
  justify-content: center;
}

.nav .ui-link {
  padding: 4px 2px;
  border-bottom: 1px solid transparent;
  transition: border .2s, color .2s;
}

.nav .ui-link.active {
  border-bottom-color: var(--fd-ink);
}

.topbar-cta {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  gap: 14px;
}

.guide-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 14px 8px 10px;
  border: 1px solid var(--fd-ink);
  border-radius: 999px;
  font-family: var(--fd-ui);
  font-size: 12.5px;
  font-weight: 500;
  letter-spacing: 0.02em;
  background: var(--fd-ink);
  color: var(--fd-paper);
  transition: background .2s, color .2s, transform .2s;
}

.guide-btn:hover { background: transparent; color: var(--fd-ink); transform: translateY(-1px); }

.guide-btn .pulse {
  width: 7px; height: 7px;
  border-radius: 999px;
  background: var(--fd-gold);
  box-shadow: 0 0 0 0 var(--fd-gold);
  animation: pulse 2.4s ease-out infinite;
}

@keyframes pulse {
  0%   { box-shadow: 0 0 0 0 rgba(168,134,88,0.65); }
  70%  { box-shadow: 0 0 0 8px rgba(168,134,88,0); }
  100% { box-shadow: 0 0 0 0 rgba(168,134,88,0); }
}

/* ── Page transitions ────────────────────────────────────────────────── */

.page {
  animation: fadein .55s cubic-bezier(.2,.6,.2,1);
}

@keyframes fadein {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: none; }
}

/* ── Container helpers ───────────────────────────────────────────────── */

.wrap-wide { max-width: var(--fd-col-wide); margin: 0 auto; padding: 0 36px; }
.wrap { max-width: var(--fd-col); margin: 0 auto; padding: 0 28px; }

.rule {
  height: 1px;
  background: var(--fd-line);
  width: 100%;
}

.rule-ink {
  height: 1px;
  background: var(--fd-ink);
  width: 100%;
}

/* ── Hero ────────────────────────────────────────────────────────────── */

.hero {
  position: relative;
  padding: 92px 0 120px;
  overflow: hidden;
}

.hero-grid {
  max-width: var(--fd-col-wide);
  margin: 0 auto;
  padding: 0 36px;
  display: grid;
  grid-template-columns: 1.25fr 1fr;
  gap: 80px;
  align-items: end;
}

.hero-meta {
  display: flex;
  flex-direction: column;
  gap: 24px;
  padding-bottom: 8px;
}

.hero-meta .roman {
  font-family: var(--fd-serif-display);
  font-style: italic;
  font-weight: 380;
  font-size: 22px;
  color: var(--fd-ink-soft);
  letter-spacing: 0.01em;
}

.hero-title-block .han-stamp {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 18px;
}

.hero-title-block .han-stamp .ch {
  font-family: var(--fd-han);
  font-size: 14px;
  font-weight: 500;
  color: var(--fd-ink-soft);
  letter-spacing: 0.06em;
}

.hero-sub {
  margin-top: 26px;
  max-width: 540px;
  font-family: var(--fd-serif-body);
  font-size: 21px;
  line-height: 1.45;
  color: var(--fd-ink-soft);
  font-weight: 380;
  font-style: italic;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 18px;
  margin-top: 42px;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 14px 22px;
  background: var(--fd-ink);
  color: var(--fd-paper);
  border-radius: 2px;
  font-family: var(--fd-ui);
  font-size: 13.5px;
  font-weight: 500;
  letter-spacing: 0.04em;
  transition: background .2s;
}
.btn-primary:hover { background: var(--fd-blue); }
.btn-primary .arrow { font-family: var(--fd-serif-display); font-style: italic; font-size: 18px; }

.btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 13px 4px;
  font-family: var(--fd-ui);
  font-size: 13.5px;
  font-weight: 500;
  letter-spacing: 0.04em;
  border-bottom: 1px solid var(--fd-ink);
  color: var(--fd-ink);
  transition: padding .2s;
}
.btn-ghost:hover { padding-right: 16px; }

/* ── Hero — real book cover image ────────────────────────────────────── */

.cover-real {
  position: relative;
  align-self: end;
  max-width: 440px;
  margin: 0 auto;
  filter: drop-shadow(0 22px 40px rgba(40,20,10,0.18))
          drop-shadow(0 3px 6px rgba(40,20,10,0.10));
  transition: transform .5s cubic-bezier(.2,.7,.2,1);
}
.cover-real:hover { transform: translateY(-4px); }

.cover-real img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 2px;
}

.cover-real-shadow {
  position: absolute;
  inset: -8% -6% -10% -6%;
  background: radial-gradient(circle at 40% 60%, rgba(231,100,55,0.22), transparent 60%),
              radial-gradient(circle at 70% 90%, rgba(60,120,200,0.18), transparent 55%);
  z-index: -1;
  filter: blur(40px);
  pointer-events: none;
}

/* ── Hero — old constructed cover (fallback) ─────────────────────────── */

.cover {
  position: relative;
  aspect-ratio: 0.72 / 1;
  background: linear-gradient(170deg, #F5EFE0 0%, #EAE2CC 70%, #DDD2B5 100%);
  border: 1px solid var(--fd-line);
  box-shadow:
    0 1px 1px rgba(0,0,0,0.04),
    0 22px 50px -20px rgba(60,46,20,0.35),
    inset 0 0 0 1px rgba(255,255,255,0.4);
  padding: 38px 32px 32px;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  font-family: var(--fd-serif-display);
}

.cover::before {
  content: "";
  position: absolute;
  inset: 18px;
  border: 1px solid rgba(26,26,26,0.18);
  pointer-events: none;
}

.cover-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 24px;
}

.cover-top .han-vert {
  writing-mode: vertical-rl;
  font-family: var(--fd-han);
  font-size: 14px;
  font-weight: 500;
  color: var(--fd-ink-soft);
  letter-spacing: 0.5em;
  white-space: nowrap;
}

.cover-mark {
  font-family: var(--fd-mono);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--fd-ink-soft);
}

.cover-title {
  font-family: var(--fd-serif-display);
  font-style: italic;
  font-weight: 380;
  font-size: clamp(40px, 4.4vw, 72px);
  line-height: 0.96;
  color: var(--fd-ink);
  letter-spacing: -0.02em;
  margin-top: auto;
}

.cover-title em { font-style: normal; font-weight: 500; }

.cover-num {
  font-family: var(--fd-serif-display);
  font-weight: 200;
  font-variation-settings: "opsz" 144;
  font-size: 280px;
  line-height: 1;
  color: rgba(26,26,26,0.07);
  position: absolute;
  right: 8%;
  top: 18%;
  user-select: none;
  pointer-events: none;
}

.cover-foot {
  margin-top: 22px;
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 16px;
}

.cover-foot .author {
  font-family: var(--fd-serif-display);
  font-weight: 460;
  font-size: 18px;
  letter-spacing: 0.01em;
  color: var(--fd-ink);
}

.cover-foot .meta {
  font-family: var(--fd-mono);
  font-size: 9.5px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--fd-ink-soft);
  text-align: right;
}

/* ── Poem strip ──────────────────────────────────────────────────────── */

.poem {
  border-top: 1px solid var(--fd-ink);
  border-bottom: 1px solid var(--fd-line);
  background: var(--fd-paper);
}

.poem-inner {
  max-width: var(--fd-col-wide);
  margin: 0 auto;
  padding: 56px 36px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 36px;
}

.poem-line {
  display: flex;
  flex-direction: column;
  gap: 14px;
  border-left: 1px solid var(--fd-line);
  padding-left: 22px;
}
.poem-line:first-child { border-left: none; padding-left: 0; }

.poem-num {
  font-family: var(--fd-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--fd-ink-faint);
}

.poem-ch {
  font-family: var(--fd-han);
  font-weight: 600;
  font-size: 22px;
  letter-spacing: 0.06em;
  color: var(--fd-ink);
}

.poem-en {
  font-family: var(--fd-serif-display);
  font-style: italic;
  font-weight: 380;
  font-size: 19px;
  line-height: 1.25;
  color: var(--fd-ink-soft);
}

/* ── Section heading ─────────────────────────────────────────────────── */

.section-head {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 48px;
  padding: 80px 0 32px;
  align-items: end;
}

.section-head .lab {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.section-head .lab .num {
  font-family: var(--fd-serif-display);
  font-weight: 300;
  font-variation-settings: "opsz" 144;
  font-size: 60px;
  line-height: 1;
  color: var(--fd-ink);
}

.section-head .title {
  font-family: var(--fd-serif-display);
  font-weight: 420;
  font-size: clamp(34px, 3.6vw, 52px);
  line-height: 1.04;
  letter-spacing: -0.015em;
  color: var(--fd-ink);
}

.section-head .title em { font-style: italic; font-weight: 380; color: var(--fd-ink-soft); }

/* ── Library (TOC) ───────────────────────────────────────────────────── */

.library {
  padding: 0 0 120px;
}

.part-block {
  padding: 56px 0 8px;
}

.part-head {
  max-width: var(--fd-col-wide);
  margin: 0 auto;
  padding: 0 36px;
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 48px;
  align-items: baseline;
  border-top: 1px solid var(--fd-ink);
  padding-top: 32px;
}

.part-head .roman {
  font-family: var(--fd-serif-display);
  font-style: italic;
  font-weight: 380;
  font-size: 42px;
  line-height: 1;
  color: var(--fd-ink);
}

.part-head .roman .small {
  display: block;
  font-family: var(--fd-mono);
  font-style: normal;
  font-weight: 500;
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--fd-ink-faint);
  margin-bottom: 10px;
}

.part-head .body { display: flex; flex-direction: column; gap: 14px; }

.part-head .title {
  font-family: var(--fd-serif-display);
  font-weight: 430;
  font-size: clamp(32px, 3vw, 44px);
  line-height: 1.04;
  letter-spacing: -0.015em;
  color: var(--fd-ink);
}

.part-head .han {
  font-family: var(--fd-han);
  font-weight: 500;
  font-size: 18px;
  color: var(--fd-ink-soft);
  letter-spacing: 0.08em;
}

.part-head .desc {
  max-width: 620px;
  font-family: var(--fd-serif-body);
  font-style: italic;
  font-size: 18px;
  line-height: 1.5;
  color: var(--fd-ink-soft);
  margin-top: 4px;
}

.chapters {
  max-width: var(--fd-col-wide);
  margin: 0 auto;
  padding: 16px 36px 0;
}

.chapter-row {
  display: grid;
  grid-template-columns: 200px 1fr auto;
  gap: 48px;
  align-items: baseline;
  padding: 22px 0;
  border-bottom: 1px solid var(--fd-line);
  cursor: pointer;
  transition: background .25s, padding .25s;
  position: relative;
}

.chapter-row::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(168,134,88,0.06), transparent 60%);
  opacity: 0;
  transition: opacity .25s;
  pointer-events: none;
}
.chapter-row:hover::before { opacity: 1; }
.chapter-row:hover .chapter-title { color: var(--fd-blue); }
.chapter-row:hover .read-arrow { transform: translateX(6px); }

.chapter-num {
  font-family: var(--fd-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--fd-ink-faint);
  text-transform: uppercase;
}

.chapter-mid { display: flex; flex-direction: column; gap: 8px; }

.chapter-title {
  font-family: var(--fd-serif-display);
  font-weight: 460;
  font-size: 26px;
  line-height: 1.1;
  letter-spacing: -0.01em;
  color: var(--fd-ink);
  transition: color .2s;
}

.chapter-title em {
  font-family: var(--fd-han);
  font-style: normal;
  font-weight: 500;
  font-size: 18px;
  color: var(--fd-ink-soft);
  margin-left: 10px;
  vertical-align: 1px;
}

.chapter-summary {
  font-family: var(--fd-serif-body);
  font-size: 16px;
  line-height: 1.5;
  color: var(--fd-ink-soft);
  max-width: 580px;
  font-style: italic;
  font-weight: 380;
}

.read-arrow {
  font-family: var(--fd-serif-display);
  font-style: italic;
  font-size: 22px;
  color: var(--fd-ink);
  transition: transform .25s;
  align-self: center;
}

/* ── Reader ──────────────────────────────────────────────────────────── */

.reader {
  padding: 60px 0 140px;
  background: var(--fd-paper);
}

.reader-meta {
  max-width: var(--fd-col);
  margin: 0 auto;
  padding: 0 28px 12px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}

.reader-meta .crumbs {
  font-family: var(--fd-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--fd-ink-faint);
}

.reader-meta .back {
  font-family: var(--fd-ui);
  font-size: 13px;
  color: var(--fd-ink-soft);
}

.reader-meta .back:hover { color: var(--fd-blue); }

.reader-title-wrap {
  max-width: var(--fd-col);
  margin: 0 auto;
  padding: 24px 28px 0;
}

.reader-num {
  font-family: var(--fd-serif-display);
  font-weight: 200;
  font-variation-settings: "opsz" 144;
  font-size: 110px;
  line-height: 1;
  color: var(--fd-ink);
  margin-bottom: 14px;
}

.reader-title {
  font-family: var(--fd-serif-display);
  font-weight: 430;
  font-size: clamp(40px, 4.6vw, 64px);
  line-height: 1.02;
  letter-spacing: -0.02em;
  color: var(--fd-ink);
}

.reader-title em {
  font-family: var(--fd-han);
  font-style: normal;
  font-weight: 500;
  font-size: 0.42em;
  color: var(--fd-ink-soft);
  display: block;
  margin-top: 14px;
  letter-spacing: 0.1em;
}

.reader-bridge {
  font-family: var(--fd-serif-body);
  font-style: italic;
  font-size: 18px;
  color: var(--fd-ink-soft);
  margin-top: 22px;
  max-width: 540px;
  font-weight: 380;
  border-left: 2px solid var(--fd-gold);
  padding-left: 16px;
}

.reader-body {
  max-width: var(--fd-col);
  margin: 56px auto 0;
  padding: 0 28px;
}

.reader-body .drop > :first-letter {
  font-family: var(--fd-serif-display);
  font-weight: 400;
  font-size: 4.4em;
  line-height: 0.86;
  float: left;
  padding: 6px 12px 0 0;
  color: var(--fd-ink);
}

.pull {
  margin: 56px -40px;
  padding: 28px 40px;
  background: var(--fd-paper);
  border-top: 1px solid var(--fd-ink);
  border-bottom: 1px solid var(--fd-ink);
  font-family: var(--fd-serif-display);
  font-style: italic;
  font-weight: 380;
  font-size: clamp(24px, 2.4vw, 32px);
  line-height: 1.2;
  color: var(--fd-ink);
  letter-spacing: -0.01em;
}

.pull .cite {
  display: block;
  margin-top: 14px;
  font-family: var(--fd-mono);
  font-style: normal;
  font-weight: 500;
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--fd-ink-faint);
}

.pull .han {
  display: block;
  margin-top: 10px;
  font-family: var(--fd-han);
  font-style: normal;
  font-weight: 400;
  font-size: 0.55em;
  line-height: 1.5;
  color: var(--fd-ink-soft);
}

.reader-body h3 {
  font-family: var(--fd-serif-display);
  font-weight: 460;
  font-size: 26px;
  line-height: 1.15;
  letter-spacing: -0.01em;
  color: var(--fd-ink);
  margin: 56px 0 18px;
}

.reader-body h3 .num {
  font-family: var(--fd-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.18em;
  color: var(--fd-ink-faint);
  display: block;
  margin-bottom: 6px;
  text-transform: uppercase;
}

.reader-footer {
  max-width: var(--fd-col);
  margin: 100px auto 0;
  padding: 0 28px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  border-top: 1px solid var(--fd-line);
  padding-top: 32px;
}

.reader-nav {
  display: flex;
  flex-direction: column;
  gap: 6px;
  cursor: pointer;
  text-decoration: none;
  color: inherit;
}
.reader-nav.next { text-align: right; }

.reader-nav .lab {
  font-family: var(--fd-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--fd-ink-faint);
}
.reader-nav .ttl {
  font-family: var(--fd-serif-display);
  font-weight: 460;
  font-size: 22px;
  letter-spacing: -0.01em;
  color: var(--fd-ink);
  transition: color .2s;
}
.reader-nav:hover .ttl { color: var(--fd-blue); }

/* ── Wiki ────────────────────────────────────────────────────────────── */

.wiki {
  padding: 0 0 140px;
}

.wiki-hero {
  background: var(--fd-paper);
  border-bottom: 1px solid var(--fd-line);
  padding: 64px 0 56px;
}

.wiki-hero .inner {
  max-width: var(--fd-col-wide);
  margin: 0 auto;
  padding: 0 36px;
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 60px;
  align-items: end;
}

.wiki-search {
  display: flex;
  align-items: center;
  gap: 12px;
  border: 1px solid var(--fd-ink);
  padding: 14px 18px;
  background: var(--fd-bg);
  margin-top: 22px;
}

.wiki-search input {
  flex: 1;
  border: none;
  outline: none;
  background: transparent;
  font-family: var(--fd-serif-body);
  font-size: 17px;
  color: var(--fd-ink);
}
.wiki-search input::placeholder { color: var(--fd-ink-faint); font-style: italic; }
.wiki-search .icon { font-family: var(--fd-mono); font-size: 14px; color: var(--fd-ink-faint); }

.wiki-grid {
  max-width: var(--fd-col-wide);
  margin: 0 auto;
  padding: 56px 36px 0;
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 56px;
}

.wiki-side {
  position: sticky;
  top: 90px;
  align-self: start;
}

.wiki-side h4 {
  font-family: var(--fd-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--fd-ink-faint);
  margin: 0 0 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--fd-line);
}

.wiki-side ul { list-style: none; padding: 0; margin: 0 0 28px; display: flex; flex-direction: column; gap: 6px; }

.wiki-side li button {
  text-align: left;
  font-family: var(--fd-serif-body);
  font-size: 16px;
  color: var(--fd-ink-soft);
  padding: 4px 0;
  transition: color .15s;
}
.wiki-side li button.active,
.wiki-side li button:hover { color: var(--fd-ink); }

.wiki-side li button.active::before {
  content: "·  ";
  color: var(--fd-gold);
  font-weight: 700;
}

.wiki-list {
  display: flex;
  flex-direction: column;
}

.wiki-entry-row {
  padding: 22px 0;
  border-bottom: 1px solid var(--fd-line);
  cursor: pointer;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 24px;
  align-items: baseline;
}
.wiki-entry-row:first-child { border-top: 1px solid var(--fd-ink); }
.wiki-entry-row:hover .entry-title { color: var(--fd-blue); }

.entry-cat {
  font-family: var(--fd-mono);
  font-size: 10.5px;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--fd-ink-faint);
  margin-bottom: 8px;
}

.entry-title {
  font-family: var(--fd-serif-display);
  font-weight: 460;
  font-size: 24px;
  line-height: 1.16;
  letter-spacing: -0.01em;
  color: var(--fd-ink);
  transition: color .2s;
}

.entry-title .han {
  font-family: var(--fd-han);
  font-weight: 500;
  font-size: 0.72em;
  margin-left: 8px;
  color: var(--fd-ink-soft);
}

.entry-blurb {
  font-family: var(--fd-serif-body);
  font-size: 16px;
  line-height: 1.5;
  color: var(--fd-ink-soft);
  font-style: italic;
  margin-top: 6px;
  max-width: 600px;
}

.entry-arrow {
  font-family: var(--fd-serif-display);
  font-style: italic;
  font-size: 22px;
  color: var(--fd-ink-soft);
}

/* ── Wiki entry detail ───────────────────────────────────────────────── */

.wiki-detail {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: 60px;
  max-width: var(--fd-col-wide);
  margin: 0 auto;
  padding: 56px 36px 0;
}

.wiki-article { min-width: 0; }

.wiki-article h1 {
  font-family: var(--fd-serif-display);
  font-weight: 430;
  font-size: clamp(36px, 4vw, 56px);
  line-height: 1.04;
  letter-spacing: -0.02em;
  color: var(--fd-ink);
  margin: 8px 0 4px;
}

.wiki-article .ch-title {
  font-family: var(--fd-han);
  font-weight: 500;
  font-size: 24px;
  color: var(--fd-ink-soft);
  letter-spacing: 0.08em;
  margin-bottom: 28px;
}

.wiki-article h2 {
  font-family: var(--fd-serif-display);
  font-weight: 460;
  font-size: 24px;
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--fd-ink);
  margin: 48px 0 16px;
  padding-top: 24px;
  border-top: 1px solid var(--fd-line);
}

.wiki-article p {
  font-family: var(--fd-serif-body);
  font-size: 18px;
  line-height: 1.7;
  color: var(--fd-ink);
  margin: 0 0 16px;
}

.wiki-mapping {
  margin: 16px 0 24px;
  border: 1px solid var(--fd-line);
  background: var(--fd-paper);
}

.wiki-mapping .row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  border-bottom: 1px solid var(--fd-line);
}
.wiki-mapping .row:last-child { border-bottom: none; }
.wiki-mapping .cell { padding: 14px 18px; font-family: var(--fd-serif-body); font-size: 15.5px; color: var(--fd-ink); line-height: 1.45; }
.wiki-mapping .cell.l { border-right: 1px solid var(--fd-line); background: var(--fd-bg); font-style: italic; color: var(--fd-ink-soft); }
.wiki-mapping .head .cell {
  font-family: var(--fd-mono); font-size: 10.5px; letter-spacing: 0.18em;
  text-transform: uppercase; color: var(--fd-ink-faint); padding: 10px 18px;
  background: transparent; font-style: normal;
}

.wiki-quote {
  margin: 16px 0;
  padding: 16px 0 16px 20px;
  border-left: 2px solid var(--fd-gold);
  font-family: var(--fd-serif-display);
  font-style: italic;
  font-weight: 380;
  font-size: 22px;
  line-height: 1.4;
  color: var(--fd-ink);
}
.wiki-quote .han {
  display: block;
  margin-top: 10px;
  font-family: var(--fd-han);
  font-style: normal;
  font-weight: 400;
  font-size: 0.62em;
  line-height: 1.55;
  color: var(--fd-ink-soft);
}

.wiki-aside {
  align-self: start;
  position: sticky;
  top: 90px;
  border-top: 1px solid var(--fd-ink);
  padding-top: 16px;
  font-family: var(--fd-ui);
  font-size: 13px;
  color: var(--fd-ink-soft);
}

.wiki-aside .row { padding: 10px 0; border-bottom: 1px dashed var(--fd-line); display: grid; grid-template-columns: 90px 1fr; gap: 12px; }
.wiki-aside .row:last-child { border-bottom: none; }
.wiki-aside .lab { font-family: var(--fd-mono); font-size: 10.5px; letter-spacing: 0.18em; text-transform: uppercase; color: var(--fd-ink-faint); padding-top: 3px; }
.wiki-aside .val { color: var(--fd-ink); font-family: var(--fd-serif-body); font-size: 15px; line-height: 1.4; }
.wiki-aside .val a { border-bottom: 1px solid var(--fd-line); }
.wiki-aside .val a:hover { color: var(--fd-blue); border-bottom-color: var(--fd-blue); }

/* ── Letter ──────────────────────────────────────────────────────────── */

.letter {
  background: var(--fd-paper);
  padding: 64px 0 140px;
  background-image:
    radial-gradient(circle at 20% 10%, rgba(168,134,88,0.05), transparent 40%),
    radial-gradient(circle at 80% 80%, rgba(44,90,138,0.04), transparent 40%);
}

.letter-head {
  max-width: var(--fd-col);
  margin: 0 auto;
  padding: 0 28px;
  text-align: center;
}

.letter-head .top {
  font-family: var(--fd-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--fd-ink-faint);
}

.letter-head .ttl {
  font-family: var(--fd-serif-display);
  font-style: italic;
  font-weight: 380;
  font-size: clamp(40px, 5vw, 64px);
  line-height: 1.05;
  letter-spacing: -0.015em;
  color: var(--fd-ink);
  margin-top: 18px;
}

.letter-head .han {
  font-family: var(--fd-han);
  font-weight: 500;
  font-size: 20px;
  color: var(--fd-ink-soft);
  margin-top: 16px;
  letter-spacing: 0.08em;
}

.letter-body {
  max-width: 640px;
  margin: 0 auto;
  padding: 0 28px;
}

.letter-section {
  margin-top: 64px;
}

.letter-section .stamp {
  display: inline-block;
  font-family: var(--fd-mono);
  font-size: 10.5px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--fd-ink-faint);
  padding: 6px 10px;
  border: 1px solid var(--fd-line);
  margin-bottom: 22px;
}

.letter-section h3 {
  font-family: var(--fd-serif-display);
  font-style: italic;
  font-weight: 400;
  font-size: 32px;
  line-height: 1.12;
  letter-spacing: -0.015em;
  color: var(--fd-ink);
  margin: 0 0 22px;
}

.letter-section p {
  font-family: var(--fd-serif-body);
  font-size: 19px;
  line-height: 1.75;
  color: var(--fd-ink);
  margin: 0 0 1.1em;
}

.letter-section blockquote {
  margin: 24px 0;
  padding: 0 22px;
  border-left: 2px solid var(--fd-gold);
  font-family: var(--fd-serif-body);
  font-style: italic;
  font-size: 18px;
  line-height: 1.6;
  color: var(--fd-ink-soft);
}

.letter-section .signoff {
  text-align: right;
  font-family: var(--fd-serif-display);
  font-style: italic;
  font-size: 22px;
  color: var(--fd-ink-soft);
  margin-top: 32px;
}

/* ── Guide chat panel ────────────────────────────────────────────────── */

.guide-overlay {
  position: fixed;
  inset: 0;
  background: rgba(20,18,12,0.32);
  backdrop-filter: blur(3px);
  z-index: 90;
  opacity: 0;
  pointer-events: none;
  transition: opacity .35s;
}
.guide-overlay.open { opacity: 1; pointer-events: auto; }

.guide-panel {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  width: min(460px, 92vw);
  background: var(--fd-paper);
  border-left: 1px solid var(--fd-ink);
  z-index: 100;
  display: flex;
  flex-direction: column;
  transform: translateX(105%);
  transition: transform .42s cubic-bezier(.2,.7,.2,1);
  box-shadow: -32px 0 60px -30px rgba(40,30,10,0.35);
}
.guide-panel.open { transform: none; }

.guide-head {
  padding: 24px 26px 18px;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  border-bottom: 1px solid var(--fd-line);
}

.guide-title {
  display: flex; flex-direction: column; gap: 6px;
}
.guide-title .top {
  font-family: var(--fd-mono);
  font-size: 10px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--fd-ink-faint);
}
.guide-title .name {
  font-family: var(--fd-serif-display);
  font-style: italic;
  font-weight: 400;
  font-size: 26px;
  line-height: 1.1;
  letter-spacing: -0.01em;
}

.guide-close {
  font-family: var(--fd-serif-display);
  font-size: 22px;
  color: var(--fd-ink-soft);
  padding: 4px 8px;
  transition: color .2s;
}
.guide-close:hover { color: var(--fd-ink); }

.guide-scroll {
  flex: 1;
  overflow-y: auto;
  padding: 22px 26px 12px;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.guide-msg {
  font-family: var(--fd-serif-body);
  font-size: 16.5px;
  line-height: 1.55;
  color: var(--fd-ink);
}
.guide-msg.user {
  align-self: flex-end;
  max-width: 86%;
  background: var(--fd-ink);
  color: var(--fd-paper);
  padding: 12px 16px;
  border-radius: 16px 16px 4px 16px;
  font-size: 15px;
  line-height: 1.45;
  font-family: var(--fd-ui);
}
.guide-msg.bot {
  font-style: normal;
}
.guide-msg.bot .who {
  font-family: var(--fd-mono);
  font-size: 10px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--fd-ink-faint);
  margin-bottom: 6px;
}
.guide-msg.bot p { margin: 0 0 0.8em; }
.guide-msg.bot p:last-child { margin: 0; }

.guide-typing {
  display: inline-flex;
  align-items: center;
  gap: 4px;
}
.guide-typing span {
  width: 5px; height: 5px; border-radius: 99px; background: var(--fd-ink-faint);
  animation: bounce 1.2s infinite ease-in-out;
}
.guide-typing span:nth-child(2) { animation-delay: 0.15s; }
.guide-typing span:nth-child(3) { animation-delay: 0.3s; }
@keyframes bounce {
  0%, 80%, 100% { transform: translateY(0); opacity: 0.4; }
  40% { transform: translateY(-4px); opacity: 1; }
}

.guide-suggest {
  display: flex; flex-direction: column; gap: 8px;
  margin: 8px 0 0;
}
.guide-suggest .lab {
  font-family: var(--fd-mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--fd-ink-faint);
  margin-bottom: 4px;
}
.guide-suggest button {
  text-align: left;
  border: 1px solid var(--fd-line);
  padding: 10px 14px;
  font-family: var(--fd-serif-body);
  font-style: italic;
  font-size: 15px;
  color: var(--fd-ink);
  background: var(--fd-bg);
  transition: border-color .2s, background .2s;
}
.guide-suggest button:hover { border-color: var(--fd-ink); background: var(--fd-paper); }

.guide-input {
  border-top: 1px solid var(--fd-line);
  padding: 16px 18px 18px;
  display: flex;
  gap: 10px;
  align-items: flex-end;
}
.guide-input textarea {
  flex: 1;
  border: none;
  outline: none;
  resize: none;
  background: transparent;
  font-family: var(--fd-serif-body);
  font-size: 16px;
  line-height: 1.4;
  color: var(--fd-ink);
  padding: 8px 6px;
  min-height: 32px;
  max-height: 140px;
}
.guide-input textarea::placeholder { color: var(--fd-ink-faint); font-style: italic; }
.guide-send {
  width: 36px; height: 36px;
  background: var(--fd-ink);
  color: var(--fd-paper);
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--fd-serif-display);
  font-style: italic;
  font-size: 20px;
  transition: background .2s, transform .2s;
}
.guide-send:hover { background: var(--fd-blue); }
.guide-send:disabled { background: var(--fd-ink-faint); cursor: not-allowed; }

/* ── Excerpts strip ──────────────────────────────────────────────────── */

.excerpts {
  padding: 80px 0 100px;
  border-top: 1px solid var(--fd-line);
}

.excerpts-grid {
  max-width: var(--fd-col-wide);
  margin: 0 auto;
  padding: 0 36px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 56px;
}

.excerpt {
  display: flex; flex-direction: column; gap: 14px;
}
.excerpt .qmark {
  font-family: var(--fd-serif-display);
  font-style: italic;
  font-size: 60px;
  line-height: 0.5;
  color: var(--fd-gold);
}
.excerpt p {
  font-family: var(--fd-serif-display);
  font-style: italic;
  font-weight: 380;
  font-size: 22px;
  line-height: 1.32;
  letter-spacing: -0.005em;
  color: var(--fd-ink);
}
.excerpt .cite {
  font-family: var(--fd-mono);
  font-size: 10.5px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--fd-ink-faint);
}
.excerpt .han {
  font-family: var(--fd-han);
  font-weight: 400;
  font-size: 15.5px;
  color: var(--fd-ink-soft);
  font-style: normal;
  margin-top: 4px;
  line-height: 1.6;
}

/* ── Footer ──────────────────────────────────────────────────────────── */

.foot {
  padding: 48px 0 64px;
  border-top: 1px solid var(--fd-line);
  background: var(--fd-bg);
}

.foot-inner {
  max-width: var(--fd-col-wide);
  margin: 0 auto;
  padding: 0 36px;
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 48px;
  align-items: start;
}

.foot .col { display: flex; flex-direction: column; gap: 8px; }
.foot h5 { font-family: var(--fd-mono); font-size: 10.5px; font-weight: 500; letter-spacing: 0.18em; text-transform: uppercase; color: var(--fd-ink-faint); margin: 0 0 12px; }
.foot button { font-family: var(--fd-serif-body); font-size: 16px; color: var(--fd-ink); text-align: left; padding: 2px 0; transition: color .2s; }
.foot button:hover { color: var(--fd-blue); }
.foot p { font-family: var(--fd-serif-body); font-size: 15px; color: var(--fd-ink-soft); font-style: italic; line-height: 1.5; }
.foot .colophon {
  font-family: var(--fd-mono);
  font-size: 10.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--fd-ink-faint);
  margin-top: 32px;
  padding-top: 20px;
  border-top: 1px solid var(--fd-line);
}

/* ── Responsive ──────────────────────────────────────────────────────── */

@media (max-width: 980px) {
  .topbar-inner { grid-template-columns: 1fr auto; }
  .nav { display: none; }
  .hero-grid { grid-template-columns: 1fr; gap: 48px; }
  .cover { max-width: 360px; }
  .poem-inner { grid-template-columns: repeat(2, 1fr); gap: 24px; }
  .poem-line { border-left: none !important; padding-left: 0; }
  .part-head { grid-template-columns: 1fr; gap: 16px; }
  .chapter-row { grid-template-columns: 80px 1fr auto; gap: 18px; }
  .wiki-grid { grid-template-columns: 1fr; gap: 32px; }
  .wiki-side { position: static; }
  .wiki-detail { grid-template-columns: 1fr; gap: 32px; }
  .wiki-aside { position: static; }
  .excerpts-grid { grid-template-columns: 1fr; gap: 32px; }
  .foot-inner { grid-template-columns: 1fr; }
}