/* ─────────────────────────────────────────────────────────────────
   FENG & YU — a private monograph
   typography:  EB Garamond, set everywhere — like a real photo book
   palette:     warm cream paper, warm ink, single sepia accent
   ───────────────────────────────────────────────────────────────── */

@import url('https://fonts.googleapis.com/css2?family=EB+Garamond:ital,wght@0,400;0,500;0,600;0,700;1,400;1,500;1,600&display=swap');

:root {
  --paper:       #f1ebde;
  --paper-warm:  #ece4d2;
  --paper-deep:  #e4dac3;
  --ink:         #1d1813;
  --ink-soft:    #2a231b;
  --ink-muted:   #6b5e4d;
  --ink-faint:   #a39685;
  --sepia:       #8a4a30;
  --rule:        rgba(29, 24, 19, 0.18);
  --rule-faint:  rgba(29, 24, 19, 0.08);
  --shadow:      0 28px 60px -28px rgba(29, 24, 19, 0.45);

  --serif:  'EB Garamond', 'Sorts Mill Goudy', 'Cardo', Georgia, serif;

  --tracked-wide: 0.42em;
  --tracked-mid:  0.22em;
  --tracked-tight:0.06em;

  --ease: cubic-bezier(0.215, 0.61, 0.355, 1);
  --ease-slow: cubic-bezier(0.16, 1, 0.3, 1);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--serif);
  font-size: 18px;
  line-height: 1.55;
  font-feature-settings: "kern", "liga", "onum" 1;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

body {
  overflow-x: hidden;
  background-image:
    radial-gradient(ellipse at top left,    rgba(255, 246, 224, 0.55), transparent 55%),
    radial-gradient(ellipse at bottom right, rgba(180, 140, 90, 0.10), transparent 60%);
  background-attachment: fixed;
}

/* ── paper grain overlay (subtle, fixed) ─────────────────────────── */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 1;
  opacity: 0.42;
  mix-blend-mode: multiply;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='240' height='240'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/><feColorMatrix values='0 0 0 0 0.11  0 0 0 0 0.09  0 0 0 0 0.07  0 0 0 0.22 0'/></filter><rect width='100%' height='100%' filter='url(%23n)'/></svg>");
}

/* a soft vignette to focus the eye, very faint */
body::after {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 2;
  background: radial-gradient(ellipse at center, transparent 55%, rgba(29, 24, 19, 0.12) 100%);
}

main, .gate { position: relative; z-index: 3; }

/* ════════════════════════════════════════════════════════════════════
   PASSWORD GATE
   ════════════════════════════════════════════════════════════════════ */
.gate {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: grid;
  place-items: center;
  background: var(--paper);
  transition: opacity 1.2s var(--ease-slow), visibility 1.2s var(--ease-slow);
}
.gate.is-open {
  opacity: 0;
  visibility: hidden;
}

.gate-inner {
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3rem;
  max-width: 28rem;
  padding: 2rem;
}

.gate-mark {
  font-size: 0.625rem;
  letter-spacing: var(--tracked-wide);
  text-transform: uppercase;
  color: var(--ink-muted);
  font-weight: 500;
}

.gate-mark::before,
.gate-mark::after {
  content: "·";
  margin: 0 0.6em;
  color: var(--ink-faint);
}

.gate-title {
  font-size: clamp(2.6rem, 6vw, 4.2rem);
  font-weight: 500;
  letter-spacing: var(--tracked-tight);
  line-height: 1;
}

.gate-title .amp {
  font-style: italic;
  font-weight: 400;
  margin: 0 0.18em;
  color: var(--sepia);
}

.gate-rule {
  width: 4rem;
  height: 1px;
  background: var(--ink);
  opacity: 0.4;
}

.gate-sub {
  font-style: italic;
  font-size: 1.05rem;
  color: var(--ink-muted);
}

.gate-form {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  margin-top: 1rem;
}

.gate-input {
  width: 14rem;
  background: transparent;
  border: none;
  border-bottom: 1px solid var(--ink);
  text-align: center;
  font-family: var(--serif);
  font-size: 1.1rem;
  font-style: italic;
  color: var(--ink);
  padding: 0.6rem 0.5rem;
  outline: none;
  letter-spacing: 0.18em;
  transition: border-color 0.4s var(--ease);
}
.gate-input::placeholder {
  color: var(--ink-faint);
  font-style: italic;
  letter-spacing: 0.18em;
}
.gate-input:focus { border-color: var(--sepia); }

.gate-hint {
  font-size: 0.625rem;
  letter-spacing: var(--tracked-mid);
  text-transform: uppercase;
  color: var(--ink-faint);
  min-height: 1em;
  transition: color 0.3s var(--ease);
}
.gate-hint.is-error { color: var(--sepia); }

/* ════════════════════════════════════════════════════════════════════
   PERSISTENT MARGINALIA — folio number, top mark
   ════════════════════════════════════════════════════════════════════ */
.folio {
  position: fixed;
  z-index: 50;
  font-size: 0.625rem;
  letter-spacing: var(--tracked-mid);
  text-transform: uppercase;
  color: var(--ink-muted);
  pointer-events: none;
  mix-blend-mode: multiply;
}
.folio--top-left  { top: 1.4rem; left: 1.6rem; }
.folio--top-right { top: 1.4rem; right: 1.6rem; }
.folio--bot-left  { bottom: 1.4rem; left: 1.6rem; }
.folio--bot-right { bottom: 1.4rem; right: 1.6rem; }
.folio em { font-style: italic; color: var(--ink-faint); }

.folio.is-hidden { opacity: 0; transition: opacity 0.4s var(--ease); }
body.is-locked .folio { opacity: 0; }

/* progress fill inside the bottom folio */
.folio-progress {
  display: inline-block;
  vertical-align: middle;
  width: 4.5rem;
  height: 1px;
  background: var(--rule);
  margin: 0 0.6em;
  position: relative;
  overflow: hidden;
}
.folio-progress::after {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--ink);
  transform: scaleX(var(--p, 0));
  transform-origin: left center;
  transition: transform 0.2s linear;
}

/* ════════════════════════════════════════════════════════════════════
   COVER
   ════════════════════════════════════════════════════════════════════ */
.cover {
  min-height: 100vh;
  display: grid;
  place-items: center;
  text-align: center;
  padding: 6rem 2rem;
  position: relative;
}

.cover-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2.6rem;
}

.cover-pretitle {
  font-size: 0.625rem;
  letter-spacing: var(--tracked-wide);
  text-transform: uppercase;
  color: var(--ink-muted);
}
.cover-pretitle span {
  display: inline-block;
  padding: 0 0.8em;
}
.cover-pretitle .bar {
  display: inline-block;
  width: 2.4rem;
  height: 1px;
  background: var(--ink-muted);
  vertical-align: middle;
}

.cover-title {
  font-size: clamp(4rem, 13vw, 11rem);
  font-weight: 500;
  line-height: 0.95;
  letter-spacing: -0.012em;
  color: var(--ink);
}
.cover-title .amp {
  font-style: italic;
  font-weight: 400;
  color: var(--sepia);
  margin: 0 0.12em;
  font-feature-settings: "salt" 1;
}

.cover-tagline {
  font-style: italic;
  font-size: clamp(1.05rem, 1.6vw, 1.35rem);
  color: var(--ink-soft);
  font-weight: 400;
  letter-spacing: 0.01em;
}

.cover-meta {
  display: flex;
  gap: 1.4rem;
  align-items: center;
  font-size: 0.625rem;
  letter-spacing: var(--tracked-wide);
  text-transform: uppercase;
  color: var(--ink-muted);
}
.cover-meta .dot { color: var(--ink-faint); }

.cover-scroll {
  position: absolute;
  bottom: 3rem;
  left: 50%;
  transform: translateX(-50%);
  font-size: 0.6rem;
  letter-spacing: var(--tracked-wide);
  text-transform: uppercase;
  color: var(--ink-muted);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.8rem;
  animation: drift 3.2s ease-in-out infinite;
}
.cover-scroll .stem {
  width: 1px;
  height: 3rem;
  background: linear-gradient(to bottom, transparent, var(--ink-muted));
}

@keyframes drift {
  0%, 100% { transform: translate(-50%, 0); }
  50%      { transform: translate(-50%, 8px); }
}

/* ════════════════════════════════════════════════════════════════════
   CHAPTER DIVIDER (title card)
   ════════════════════════════════════════════════════════════════════ */
.divider {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 6rem 2rem;
  text-align: center;
  position: relative;
}

.divider-frame {
  position: relative;
  padding: 5rem 4rem;
  max-width: 36rem;
}

.divider-frame::before,
.divider-frame::after {
  content: "";
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  width: 5rem;
  height: 1px;
  background: var(--ink);
  opacity: 0.5;
}
.divider-frame::before { top: 0; }
.divider-frame::after  { bottom: 0; }

.divider-roman {
  font-size: 0.7rem;
  letter-spacing: var(--tracked-wide);
  text-transform: uppercase;
  color: var(--ink-muted);
  margin-bottom: 2.4rem;
}
.divider-roman .ch {
  font-style: italic;
  letter-spacing: 0;
  text-transform: lowercase;
  font-size: 0.78rem;
  color: var(--ink-faint);
}

.divider-city {
  font-size: clamp(3.2rem, 8.5vw, 7rem);
  font-weight: 500;
  line-height: 1;
  letter-spacing: -0.005em;
  margin-bottom: 1.6rem;
}

.divider-year {
  font-size: 0.625rem;
  letter-spacing: var(--tracked-wide);
  text-transform: uppercase;
  color: var(--ink-muted);
  margin-bottom: 2.4rem;
}
.divider-year .num {
  font-style: italic;
  font-size: 0.95rem;
  letter-spacing: 0.06em;
  color: var(--sepia);
  margin: 0 0.5em;
  vertical-align: baseline;
}

.divider-poetic {
  font-style: italic;
  font-size: clamp(1.1rem, 1.6vw, 1.35rem);
  color: var(--ink-soft);
  font-weight: 400;
  max-width: 22rem;
  margin: 0 auto;
  line-height: 1.5;
}

/* ════════════════════════════════════════════════════════════════════
   CHAPTER HERO (full-bleed)
   ════════════════════════════════════════════════════════════════════ */
.hero {
  position: relative;
  width: 100%;
  height: 100vh;
  min-height: 600px;
  overflow: hidden;
  background: var(--ink);
}

.hero-img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  will-change: transform;
}

.hero-tint {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(to bottom, rgba(29, 24, 19, 0.18) 0%, transparent 25%, transparent 70%, rgba(29, 24, 19, 0.55) 100%);
  pointer-events: none;
}

.hero-stamp {
  position: absolute;
  bottom: 2.4rem;
  left: 2.4rem;
  right: 2.4rem;
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  color: var(--paper);
  font-size: 0.625rem;
  letter-spacing: var(--tracked-wide);
  text-transform: uppercase;
  z-index: 2;
}
.hero-stamp .lhs em,
.hero-stamp .rhs em {
  font-style: italic;
  color: rgba(241, 235, 222, 0.7);
  letter-spacing: 0.04em;
  text-transform: none;
  font-size: 0.78rem;
}

/* ════════════════════════════════════════════════════════════════════
   CHAPTER BODY — meta strip and photo grid
   ════════════════════════════════════════════════════════════════════ */
.chapter-body {
  padding: 7rem clamp(1.4rem, 4vw, 5rem) 9rem;
  max-width: 100rem;
  margin: 0 auto;
}

.meta-strip {
  display: flex;
  gap: 2.4rem;
  align-items: baseline;
  justify-content: space-between;
  padding-bottom: 3rem;
  margin-bottom: 4rem;
  border-bottom: 1px solid var(--rule);
  flex-wrap: wrap;
}
.meta-strip .left  { display: flex; gap: 1.6rem; align-items: baseline; font-size: 0.65rem; letter-spacing: var(--tracked-wide); text-transform: uppercase; color: var(--ink-muted); }
.meta-strip .left .frames { color: var(--ink); font-style: italic; letter-spacing: 0.04em; text-transform: none; font-size: 0.85rem; }
.meta-strip .right { font-style: italic; color: var(--ink-soft); font-size: 1rem; }

/* MASONRY-ISH GRID via CSS columns for cinematic varied flow */
.grid {
  column-count: 3;
  column-gap: 1.2rem;
}
@media (max-width: 900px) { .grid { column-count: 2; } }
@media (max-width: 540px) { .grid { column-count: 1; } }

.grid figure {
  break-inside: avoid;
  margin: 0 0 1.2rem;
  position: relative;
  overflow: hidden;
  cursor: zoom-in;
  background: var(--paper-deep);
}

.grid img {
  display: block;
  width: 100%;
  height: auto;
  transition: transform 1.6s var(--ease-slow), filter 0.6s var(--ease);
  filter: saturate(0.94) contrast(0.98);
}
.grid figure:hover img { transform: scale(1.025); filter: saturate(1.04) contrast(1.02); }

/* hairline frame on hover */
.grid figure::after {
  content: "";
  position: absolute;
  inset: 0;
  border: 1px solid rgba(241, 235, 222, 0);
  pointer-events: none;
  transition: border-color 0.4s var(--ease);
}
.grid figure:hover::after { border-color: rgba(241, 235, 222, 0.35); }

/* "more" toggle for very large chapters */
.grid-extra {
  display: none;
}
.grid-extra.is-open { display: contents; }
.grid-extra.is-open + .grid-toggle { display: none; }

.grid-toggle-wrap {
  text-align: center;
  margin-top: 3rem;
}
.grid-toggle {
  display: inline-block;
  background: transparent;
  border: none;
  border-top: 1px solid var(--ink);
  border-bottom: 1px solid var(--ink);
  padding: 1.1rem 2.4rem;
  font-family: var(--serif);
  font-size: 0.7rem;
  letter-spacing: var(--tracked-wide);
  text-transform: uppercase;
  color: var(--ink);
  text-decoration: none;
  cursor: pointer;
  transition: background 0.5s var(--ease), color 0.5s var(--ease), letter-spacing 0.5s var(--ease);
}
.grid-toggle::after {
  content: "→";
  display: inline-block;
  margin-left: 0.9em;
  font-style: italic;
  letter-spacing: 0;
  transition: transform 0.5s var(--ease);
}
.grid-toggle:hover { background: var(--ink); color: var(--paper); letter-spacing: calc(var(--tracked-wide) + 0.02em); }
.grid-toggle:hover::after { transform: translateX(4px); }

/* ════════════════════════════════════════════════════════════════════
   VIDEO REEL
   ════════════════════════════════════════════════════════════════════ */
.reel-section {
  margin-top: 6rem;
  padding-top: 4rem;
  border-top: 1px solid var(--rule);
}
.reel-label {
  font-size: 0.625rem;
  letter-spacing: var(--tracked-wide);
  text-transform: uppercase;
  color: var(--ink-muted);
  margin-bottom: 2rem;
  display: flex;
  align-items: center;
  gap: 1rem;
}
.reel-label::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--rule);
}

.reel {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(28rem, 100%), 1fr));
  gap: 1.4rem;
}
.reel video {
  width: 100%;
  height: auto;
  display: block;
  background: var(--ink);
  filter: saturate(0.95) contrast(0.98);
}

/* PDF link */
.pdf-row {
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid var(--rule);
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
}
.pdf-row a {
  font-style: italic;
  color: var(--sepia);
  text-decoration: none;
  font-size: 1.05rem;
  border-bottom: 1px solid currentColor;
  align-self: flex-start;
  padding-bottom: 1px;
  transition: opacity 0.3s var(--ease);
}
.pdf-row a:hover { opacity: 0.7; }
.pdf-row .label {
  font-size: 0.625rem;
  letter-spacing: var(--tracked-wide);
  text-transform: uppercase;
  color: var(--ink-muted);
}

/* ════════════════════════════════════════════════════════════════════
   END CARD / COLOPHON
   ════════════════════════════════════════════════════════════════════ */
.end {
  min-height: 90vh;
  display: grid;
  place-items: center;
  text-align: center;
  padding: 6rem 2rem;
}
.end-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2.4rem;
  max-width: 30rem;
}
.end-mark {
  font-size: 0.625rem;
  letter-spacing: var(--tracked-wide);
  text-transform: uppercase;
  color: var(--ink-muted);
}
.end-title {
  font-size: clamp(2rem, 5vw, 3.6rem);
  font-style: italic;
  font-weight: 400;
  color: var(--ink);
  line-height: 1.1;
}
.end-rule { width: 4rem; height: 1px; background: var(--ink); opacity: 0.4; }
.end-sub  { font-style: italic; color: var(--ink-soft); font-size: 1.05rem; max-width: 22rem; }
.end-colophon {
  margin-top: 3rem;
  font-size: 0.6rem;
  letter-spacing: var(--tracked-mid);
  text-transform: uppercase;
  color: var(--ink-faint);
  line-height: 2;
}

/* ════════════════════════════════════════════════════════════════════
   LIGHTBOX
   ════════════════════════════════════════════════════════════════════ */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 200;
  background: rgba(15, 12, 9, 0.94);
  display: grid;
  place-items: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.5s var(--ease), visibility 0.5s var(--ease);
}
.lightbox.is-open { opacity: 1; visibility: visible; }

.lightbox img {
  max-width: 92vw;
  max-height: 88vh;
  display: block;
  cursor: zoom-out;
  filter: saturate(0.96) contrast(0.99);
  transition: transform 0.6s var(--ease);
}

.lightbox-close,
.lightbox-prev,
.lightbox-next {
  position: absolute;
  background: transparent;
  border: none;
  color: var(--paper);
  font-family: var(--serif);
  font-size: 0.7rem;
  letter-spacing: var(--tracked-wide);
  text-transform: uppercase;
  cursor: pointer;
  padding: 1rem;
  opacity: 0.6;
  transition: opacity 0.3s var(--ease);
}
.lightbox-close:hover,
.lightbox-prev:hover,
.lightbox-next:hover { opacity: 1; }
.lightbox-close { top: 1rem; right: 1rem; }
.lightbox-prev  { left: 1rem;  top: 50%; transform: translateY(-50%); }
.lightbox-next  { right: 1rem; top: 50%; transform: translateY(-50%); }

.lightbox-caption {
  position: absolute;
  bottom: 1.4rem;
  left: 0; right: 0;
  text-align: center;
  color: rgba(241, 235, 222, 0.6);
  font-size: 0.625rem;
  letter-spacing: var(--tracked-mid);
  text-transform: uppercase;
}
.lightbox-caption em { font-style: italic; letter-spacing: 0.04em; text-transform: none; }

/* ════════════════════════════════════════════════════════════════════
   REVEAL ANIMATIONS
   ════════════════════════════════════════════════════════════════════ */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 1.4s var(--ease-slow), transform 1.4s var(--ease-slow);
}
.reveal.is-in {
  opacity: 1;
  transform: translateY(0);
}

.reveal-stagger > * {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 1.0s var(--ease-slow), transform 1.0s var(--ease-slow);
}
.reveal-stagger.is-in > * {
  opacity: 1;
  transform: translateY(0);
}
.reveal-stagger.is-in > *:nth-child(1) { transition-delay: 0.05s; }
.reveal-stagger.is-in > *:nth-child(2) { transition-delay: 0.20s; }
.reveal-stagger.is-in > *:nth-child(3) { transition-delay: 0.35s; }
.reveal-stagger.is-in > *:nth-child(4) { transition-delay: 0.50s; }
.reveal-stagger.is-in > *:nth-child(5) { transition-delay: 0.65s; }
.reveal-stagger.is-in > *:nth-child(6) { transition-delay: 0.80s; }
.reveal-stagger.is-in > *:nth-child(7) { transition-delay: 0.95s; }

/* on-load cover reveal */
body.is-revealed .cover-pretitle { animation: rise 1.4s var(--ease-slow) 0.2s both; }
body.is-revealed .cover-title    { animation: rise 1.6s var(--ease-slow) 0.5s both; }
body.is-revealed .cover-tagline  { animation: rise 1.4s var(--ease-slow) 0.95s both; }
body.is-revealed .cover-meta     { animation: rise 1.2s var(--ease-slow) 1.30s both; }
body.is-revealed .cover-scroll   { animation: rise 1.0s var(--ease-slow) 1.80s both; }

@keyframes rise {
  from { opacity: 0; transform: translateY(18px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* body locked when gate is up */
body.is-locked { overflow: hidden; height: 100vh; }
body.is-locked main, body.is-locked .folio { visibility: hidden; }

/* ════════════════════════════════════════════════════════════════════
   CHAPTER DETAIL PAGE
   ════════════════════════════════════════════════════════════════════ */
.folio-link {
  pointer-events: auto;
  text-decoration: none;
  transition: color 0.3s var(--ease);
}
.folio-link:hover { color: var(--ink); }
.folio-link em {
  font-style: italic;
  margin-right: 0.4em;
  color: var(--sepia);
}

.section-label {
  font-size: 0.625rem;
  letter-spacing: var(--tracked-wide);
  text-transform: uppercase;
  color: var(--ink-muted);
  margin: 4rem 0 2rem;
  padding-top: 2rem;
  border-top: 1px solid var(--rule);
  display: flex;
  align-items: center;
  gap: 1.4rem;
}
.section-label::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--rule);
}
/* first label has no top border */
.chapter-body > .section-label:first-of-type { border-top: 0; padding-top: 0; }

/* ── CUSTOM SLOT (letters, chat logs, notes) ────────────────────── */
.custom-slot:empty { display: none; }
.custom-slot > * + * { margin-top: 5rem; }

/* LETTER ───────────────────────────────────────────────────────── */
.letter {
  max-width: 36rem;
  margin: 6rem auto;
  padding: 5rem clamp(1.4rem, 4vw, 4rem);
  background:
    linear-gradient(180deg, rgba(252, 248, 235, 0.95), rgba(248, 242, 224, 0.95));
  position: relative;
  box-shadow: var(--shadow);
  border: 1px solid rgba(31, 26, 20, 0.12);
}
/* a single pin/seal mark in the top-right */
.letter::before {
  content: "·";
  position: absolute;
  top: 1.4rem;
  right: 1.6rem;
  font-size: 1.4rem;
  color: var(--sepia);
}

.letter-date {
  font-size: 0.625rem;
  letter-spacing: var(--tracked-wide);
  text-transform: uppercase;
  color: var(--ink-muted);
  margin-bottom: 0.6rem;
}
.letter-place {
  font-size: 0.625rem;
  letter-spacing: var(--tracked-wide);
  text-transform: uppercase;
  color: var(--ink-faint);
  margin-bottom: 3rem;
}
.letter-salutation {
  font-size: 1.4rem;
  font-style: italic;
  color: var(--ink);
  margin-bottom: 2rem;
}
.letter-body {
  font-size: 1.05rem;
  line-height: 1.85;
  color: var(--ink-soft);
}
.letter-body p { margin: 0 0 1.4em; }
.letter-body p:last-child { margin-bottom: 0; }
.letter-body em { color: var(--sepia); }
.letter-sign {
  margin-top: 3rem;
  font-style: italic;
  font-size: 1.25rem;
  color: var(--ink);
}
.letter-sign .by {
  display: block;
  font-size: 0.625rem;
  letter-spacing: var(--tracked-wide);
  text-transform: uppercase;
  font-style: normal;
  color: var(--ink-faint);
  margin-top: 0.6rem;
}

/* CHAT LOG ─────────────────────────────────────────────────────── */
.chat-log {
  max-width: 42rem;
  margin: 4rem auto;
  padding: 0;
  font-feature-settings: "kern", "liga";
}
.chat-log-head {
  font-size: 0.625rem;
  letter-spacing: var(--tracked-wide);
  text-transform: uppercase;
  color: var(--ink-muted);
  margin-bottom: 2.4rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--rule);
  display: flex;
  justify-content: space-between;
  align-items: baseline;
}
.chat-log-head em {
  font-style: italic;
  font-size: 0.85rem;
  letter-spacing: 0.04em;
  text-transform: none;
  color: var(--ink-soft);
}

.chat-log .msg {
  display: grid;
  grid-template-columns: 1.6rem 1fr 4rem;
  gap: 1rem;
  align-items: baseline;
  padding: 0.65rem 0;
  border-bottom: 1px solid var(--rule-faint);
}
.chat-log .msg:last-child { border-bottom: 0; }
.chat-log .who {
  font-size: 0.65rem;
  letter-spacing: var(--tracked-mid);
  text-transform: uppercase;
  color: var(--sepia);
  font-weight: 600;
}
.chat-log .what {
  font-size: 1rem;
  color: var(--ink);
  line-height: 1.55;
}
.chat-log .what em { color: var(--ink-muted); }
.chat-log .when {
  font-size: 0.6rem;
  letter-spacing: var(--tracked-tight);
  color: var(--ink-faint);
  font-variant-numeric: tabular-nums;
  text-align: right;
}
/* date separator between sets of messages */
.chat-log .day {
  text-align: center;
  font-size: 0.6rem;
  letter-spacing: var(--tracked-wide);
  text-transform: uppercase;
  color: var(--ink-faint);
  padding: 1.6rem 0 0.6rem;
  display: flex;
  align-items: center;
  gap: 1.2rem;
}
.chat-log .day::before,
.chat-log .day::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--rule-faint);
}

/* NOTE (free-form text block) ───────────────────────────────────── */
.note {
  max-width: 36rem;
  margin: 4rem auto;
  font-size: 1.05rem;
  line-height: 1.75;
  color: var(--ink-soft);
  font-style: italic;
}
.note p { margin: 0 0 1.2em; }
.note .by {
  display: block;
  font-size: 0.625rem;
  letter-spacing: var(--tracked-wide);
  text-transform: uppercase;
  font-style: normal;
  color: var(--ink-faint);
  margin-top: 1.6rem;
}

/* MAP ──────────────────────────────────────────────────────────── */
.map-wrap {
  margin: 2rem 0 1rem;
}
.map {
  width: 100%;
  height: clamp(360px, 56vh, 620px);
  background: var(--paper-deep);
  border: 1px solid var(--rule);
  box-shadow: 0 18px 36px -20px rgba(29, 24, 19, 0.25);
}
/* override Google's default UI typography inside the map */
.map .gm-style {
  font-family: var(--serif) !important;
}
.map .gm-style-iw, .map .gm-style-iw-c {
  font-family: var(--serif) !important;
  background: var(--paper-warm) !important;
  border-radius: 0 !important;
  box-shadow: 0 18px 36px -20px rgba(29, 24, 19, 0.5) !important;
  padding: 0 !important;
}
.map .gm-style-iw-d { overflow: hidden !important; padding: 0 !important; }
.map .gm-style-iw-tc::after { background: var(--paper-warm) !important; }
.map .gm-ui-hover-effect { display: none !important; } /* hide default close 'x' */

.map-pop {
  width: 200px;
  cursor: zoom-in;
  background: var(--paper-warm);
}
.map-pop img {
  display: block;
  width: 100%;
  height: auto;
  filter: saturate(0.94) contrast(0.98);
}
.map-pop .meta {
  padding: 0.6rem 0.8rem 0.7rem;
  font-size: 0.6rem;
  letter-spacing: var(--tracked-mid);
  text-transform: uppercase;
  color: var(--ink-muted);
  border-top: 1px solid var(--rule);
}

.map-meta {
  margin-top: 1rem;
  font-size: 0.625rem;
  letter-spacing: var(--tracked-wide);
  text-transform: uppercase;
  color: var(--ink-muted);
}
.map-meta em {
  font-style: italic;
  letter-spacing: 0.04em;
  text-transform: none;
  font-size: 0.85rem;
  color: var(--ink-soft);
}
.map-meta .sep { color: var(--ink-faint); margin: 0 0.4em; }

.map-hint {
  margin: 1rem 0 0;
  font-style: italic;
  font-size: 0.95rem;
  color: var(--ink-muted);
}
.map-hint em { color: var(--sepia); font-style: italic; }

/* CHAPTER PREV / NEXT NAV ──────────────────────────────────────── */
.chapter-nav {
  margin-top: 6rem;
  padding-top: 4rem;
  border-top: 1px solid var(--rule);
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 2rem;
  align-items: stretch;
}
.chapter-nav-link {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  text-decoration: none;
  color: var(--ink);
  padding: 1.5rem 1rem;
  transition: background 0.4s var(--ease), color 0.4s var(--ease);
}
.chapter-nav-link.prev  { text-align: left; }
.chapter-nav-link.home  { text-align: center; }
.chapter-nav-link.next  { text-align: right; }
.chapter-nav-link.is-empty { background: transparent; cursor: default; }
.chapter-nav-link .dir {
  font-size: 0.625rem;
  letter-spacing: var(--tracked-wide);
  text-transform: uppercase;
  color: var(--ink-muted);
}
.chapter-nav-link .ttl {
  font-size: 1.8rem;
  font-weight: 500;
  line-height: 1;
  margin: 0.4rem 0;
}
.chapter-nav-link .yr {
  font-size: 0.7rem;
  letter-spacing: var(--tracked-wide);
  text-transform: uppercase;
  color: var(--ink-faint);
  font-style: italic;
}
.chapter-nav-link:hover { color: var(--sepia); }

@media (max-width: 720px) {
  .chapter-nav { grid-template-columns: 1fr; gap: 2rem; }
  .chapter-nav-link.prev,
  .chapter-nav-link.next,
  .chapter-nav-link.home { text-align: center; }
  .letter { padding: 3rem 1.4rem; margin: 3rem auto; }
}

/* 404 fallback inside chapter root */
.not-found {
  min-height: 80vh;
  display: grid;
  place-items: center;
  text-align: center;
  gap: 2rem;
  padding: 4rem 2rem;
}

/* selection */
::selection { background: var(--sepia); color: var(--paper); }

/* responsive trims */
@media (max-width: 640px) {
  .chapter-body { padding: 4.5rem 1.2rem 6rem; }
  .hero-stamp { left: 1.2rem; right: 1.2rem; bottom: 1.2rem; }
  .meta-strip { gap: 1rem; }
  .folio--top-right, .folio--top-left { top: 0.9rem; }
  .folio--top-right { right: 1rem; }
  .folio--top-left  { left: 1rem; }
  .folio--bot-right, .folio--bot-left { bottom: 0.9rem; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}