/* ==================================================================
   THE BOOK OF ETERNITY
   Design system: DARK PAPYRUS RITUALISM
   ------------------------------------------------------------------
   1  Tokens
   2  Reset & base
   3  Typography
   4  Atmosphere
   5  Utilities & controls
   6  Vol. I  — the seal
   7  Navigation & index
   8  Volume scaffolding
   9  Vol. II — creation
   10 Vol. III — hall of gods + record dialog
   11 Vol. IV — the broken king
   12 Vol. V  — the night journey
   13 Vol. VI — the weighing
   14 Vol. VII — signs
   15 Vol. VIII — lineage
   16 Vol. IX — field of reeds
   17 Footer & floating controls
   18 Responsive
   19 Reduced motion
   ================================================================== */

/* -- 1. Tokens ----------------------------------------------------- */

:root {
  /* palette */
  --color-void: #070807;
  --color-obsidian: #0d0f0e;
  --color-charcoal: #171916;
  --color-papyrus-dark: #28251f;
  --color-papyrus: #d7c49b;
  --color-ivory: #eee4c9;
  --color-sandstone: #af9361;
  --color-gold: #b99343;
  --color-gold-light: #d2b66f;
  --color-lapis: #17445f;
  --color-malachite: #285849;
  --color-oxide: #714033;
  --color-muted: #948b78;

  /* semantic */
  --bg: var(--color-obsidian);
  --bg-deep: var(--color-void);
  --ink: var(--color-ivory);
  --ink-body: #cfc4a8;
  --ink-dim: var(--color-muted);
  --rule: rgba(185, 147, 67, 0.28);
  --rule-soft: rgba(215, 196, 155, 0.14);
  --accent: var(--color-gold);
  --chapter-accent: var(--color-gold);

  /* type */
  --font-display: 'Cinzel', 'Cormorant Garamond', 'Noto Serif SC', Georgia, 'Songti SC', serif;
  --font-serif: 'Cormorant Garamond', 'Noto Serif SC', Georgia, 'Songti SC', serif;
  --font-body: 'Manrope', 'Noto Serif SC', -apple-system, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-mono: ui-monospace, 'SFMono-Regular', 'Cascadia Mono', Menlo, monospace;

  --size-display-xl: clamp(2.9rem, 8.5vw, 7.5rem);
  --size-display-lg: clamp(2.2rem, 6vw, 5rem);
  --size-display-md: clamp(1.6rem, 3.6vw, 3rem);
  --size-display-sm: clamp(1.15rem, 2.2vw, 1.7rem);
  --size-lead: clamp(1.02rem, 1.55vw, 1.35rem);
  --size-body: clamp(0.95rem, 1.06vw, 1.06rem);
  --size-caption: clamp(0.68rem, 0.86vw, 0.8rem);
  --size-index: clamp(0.66rem, 0.8vw, 0.76rem);

  --track-display: 0.1em;
  --track-caption: 0.28em;
  --leading-display: 1.05;
  --leading-body: 1.75;

  /* space */
  --space-1: 0.35rem;
  --space-2: 0.7rem;
  --space-3: 1.1rem;
  --space-4: 1.8rem;
  --space-5: 2.8rem;
  --space-6: 4.4rem;
  --space-7: 7rem;
  --space-8: 11rem;

  --gutter: clamp(1.25rem, 5vw, 6rem);
  --measure: 62ch;
  --measure-narrow: 46ch;

  /* motion */
  --ease-ritual: cubic-bezier(0.22, 0.61, 0.24, 1);
  --ease-stone: cubic-bezier(0.16, 0.84, 0.3, 1);
  --dur-1: 240ms;
  --dur-2: 620ms;
  --dur-3: 1200ms;
  --dur-4: 2200ms;

  --nav-h: 4.25rem;
  --z-atmos: 1;
  --z-content: 2;
  --z-nav: 60;
  --z-overlay: 80;
  --z-seal: 100;
}

/* per-volume colour temperature, set by JS on <body data-tone> */
body[data-tone='creation'] { --chapter-accent: var(--color-lapis); }
body[data-tone='gods']     { --chapter-accent: var(--color-gold); }
body[data-tone='myth']     { --chapter-accent: var(--color-oxide); }
body[data-tone='night']    { --chapter-accent: var(--color-lapis); }
body[data-tone='scales']   { --chapter-accent: var(--color-sandstone); }
body[data-tone='signs']    { --chapter-accent: var(--color-gold-light); }
body[data-tone='lineage']  { --chapter-accent: #5b7f96; }
body[data-tone='reeds']    { --chapter-accent: var(--color-malachite); }

/* -- 2. Reset & base ----------------------------------------------- */

*, *::before, *::after { box-sizing: border-box; }

/* class-based layout must never win over the hidden attribute */
[hidden] { display: none !important; }

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

body {
  margin: 0;
  min-height: 100vh;
  background-color: var(--bg);
  background-image:
    radial-gradient(120% 80% at 50% -10%, rgba(23, 68, 95, 0.16), transparent 60%),
    radial-gradient(90% 60% at 50% 110%, rgba(40, 88, 73, 0.12), transparent 60%);
  color: var(--ink-body);
  font-family: var(--font-body);
  font-size: var(--size-body);
  font-weight: 300;
  line-height: var(--leading-body);
  overflow-x: hidden;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

body.is-sealed { overflow: hidden; }
body.is-locked { overflow: hidden; }

img, svg, canvas { display: block; max-width: 100%; }
img { height: auto; }

button { font: inherit; color: inherit; }

a { color: var(--color-gold-light); text-underline-offset: 0.25em; }
a:hover { color: var(--color-ivory); }

:focus-visible {
  outline: 2px solid var(--color-gold-light);
  outline-offset: 3px;
  border-radius: 2px;
}

::selection { background: rgba(185, 147, 67, 0.3); color: var(--color-ivory); }

/* -- 3. Typography -------------------------------------------------- */

.display {
  font-family: var(--font-display);
  font-weight: 400;
  line-height: var(--leading-display);
  letter-spacing: var(--track-display);
  color: var(--ink);
  margin: 0;
  text-wrap: balance;
}
.display--xl { font-size: var(--size-display-xl); letter-spacing: 0.06em; }
.display--lg { font-size: var(--size-display-lg); }
.display--md { font-size: var(--size-display-md); }
.display--sm { font-size: var(--size-display-sm); letter-spacing: 0.16em; text-transform: uppercase; }

.kicker {
  font-family: var(--font-body);
  font-size: var(--size-index);
  letter-spacing: var(--track-caption);
  text-transform: uppercase;
  color: var(--color-gold);
  margin: 0 0 var(--space-3);
}
.kicker::before {
  content: '';
  display: inline-block;
  width: 2.2rem;
  height: 1px;
  margin-right: 0.9rem;
  vertical-align: 0.32em;
  background: currentColor;
  opacity: 0.6;
}

.lead {
  font-family: var(--font-serif);
  font-size: var(--size-lead);
  font-weight: 300;
  line-height: 1.6;
  color: var(--color-papyrus);
  max-width: var(--measure);
  margin: var(--space-4) 0 0;
  text-wrap: pretty;
}

.body { max-width: var(--measure); margin: var(--space-4) 0 0; }
.body--sm { font-size: 0.94em; color: var(--ink-dim); }

.caption {
  font-family: var(--font-body);
  font-size: var(--size-caption);
  letter-spacing: var(--track-caption);
  text-transform: uppercase;
  color: var(--ink-dim);
  margin: 0;
}
.caption--dim { color: rgba(148, 139, 120, 0.6); }
.caption--rule { margin-top: var(--space-4); }
.caption--rule::before {
  content: '';
  display: block;
  width: 3.5rem;
  height: 1px;
  background: var(--rule);
  margin: 0 auto var(--space-3);
}

.pull {
  margin: var(--space-5) 0;
  padding: var(--space-4) 0;
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  font-family: var(--font-serif);
  font-style: italic;
  font-size: clamp(1.1rem, 2.1vw, 1.6rem);
  line-height: 1.5;
  color: var(--color-papyrus);
}
.pull p { margin: 0; }

/* Chinese typography tuning */
html[lang='zh-Hans'] body { line-height: 1.95; }
html[lang='zh-Hans'] .display { letter-spacing: 0.12em; }
html[lang='zh-Hans'] .display--xl { font-size: clamp(2.4rem, 7vw, 6rem); }
html[lang='zh-Hans'] .lead,
html[lang='zh-Hans'] .body { text-align: justify; text-justify: inter-ideograph; }
html[lang='zh-Hans'] .caption { letter-spacing: 0.18em; }

/* -- 4. Atmosphere -------------------------------------------------- */

.dust, .grain, .vignette {
  position: fixed;
  inset: 0;
  z-index: var(--z-atmos);
  pointer-events: none;
}

.grain {
  background-image: url('assets/textures/grain.svg');
  background-size: 200px 200px;
  opacity: 0.05;
  mix-blend-mode: overlay;
}

.vignette {
  background:
    radial-gradient(130% 100% at 50% 50%, transparent 42%, rgba(7, 8, 7, 0.72) 100%);
}

/* -- 5. Utilities & controls --------------------------------------- */

.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: fixed;
  top: 0.6rem;
  left: 50%;
  transform: translate(-50%, -160%);
  z-index: 200;
  padding: 0.7rem 1.4rem;
  background: var(--color-charcoal);
  border: 1px solid var(--rule);
  color: var(--color-ivory);
  font-size: var(--size-caption);
  letter-spacing: var(--track-caption);
  text-transform: uppercase;
  text-decoration: none;
  transition: transform var(--dur-1) var(--ease-stone);
}
.skip-link:focus { transform: translate(-50%, 0); }

.btn {
  --btn-fg: var(--color-papyrus);
  --btn-bd: var(--rule);
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.55em;
  min-height: 44px;
  padding: 0.85rem 1.9rem;
  background: transparent;
  border: 1px solid var(--btn-bd);
  color: var(--btn-fg);
  font-family: var(--font-body);
  font-size: var(--size-caption);
  font-weight: 400;
  letter-spacing: var(--track-caption);
  text-transform: uppercase;
  text-decoration: none;
  cursor: pointer;
  transition: color var(--dur-1) var(--ease-stone),
              border-color var(--dur-1) var(--ease-stone),
              background-color var(--dur-1) var(--ease-stone);
}
.btn::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(120% 140% at 50% 120%, rgba(185, 147, 67, 0.22), transparent 70%);
  opacity: 0;
  transition: opacity var(--dur-2) var(--ease-stone);
  pointer-events: none;
}
.btn:hover { color: var(--color-ivory); border-color: rgba(210, 182, 111, 0.65); }
.btn:hover::after { opacity: 1; }
.btn[disabled] { opacity: 0.45; cursor: default; }
.btn[disabled]:hover::after { opacity: 0; }

.btn--gold { --btn-fg: var(--color-gold-light); --btn-bd: rgba(185, 147, 67, 0.5); }
.btn--ghost { --btn-fg: var(--ink-dim); --btn-bd: rgba(215, 196, 155, 0.18); padding: 0.7rem 1.2rem; }
.btn--seal { padding: 1rem 2.6rem; --btn-fg: var(--color-gold-light); --btn-bd: rgba(185, 147, 67, 0.55); }

.btn--icon {
  min-width: 44px;
  padding: 0;
  border-color: transparent;
  font-size: 1rem;
  letter-spacing: 0;
}
.btn--icon:hover { border-color: var(--rule); }

.dot {
  width: 0.55rem; height: 0.55rem;
  border-radius: 50%;
  display: inline-block;
  border: 1px solid currentColor;
}
.dot--heart { color: var(--color-oxide); background: rgba(113, 64, 51, 0.6); }
.dot--feather { color: var(--color-papyrus); background: rgba(215, 196, 155, 0.5); }
.dot--anubis { color: #4a5a5e; background: rgba(74, 90, 94, 0.6); }
.dot--thoth { color: #5b7f96; background: rgba(91, 127, 150, 0.5); }

/* -- 6. Vol. I — the seal ------------------------------------------ */

.seal {
  position: fixed;
  inset: 0;
  z-index: var(--z-seal);
  display: grid;
  place-items: center;
  padding: var(--gutter);
  background:
    radial-gradient(80% 60% at 50% 42%, rgba(185, 147, 67, 0.09), transparent 62%),
    var(--color-void);
  text-align: center;
  transition: opacity var(--dur-3) var(--ease-ritual), visibility var(--dur-3);
}
.seal[data-state='open'] { opacity: 0; visibility: hidden; pointer-events: none; }

.seal__inner { max-width: 46rem; width: 100%; }

.seal__book {
  position: relative;
  width: min(34rem, 78vw);
  margin: 0 auto var(--space-5);
  filter: drop-shadow(0 2rem 3rem rgba(0, 0, 0, 0.7));
}
.seal__book-img { width: 100%; }

.seal__crack {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}
.seal__crack-line {
  fill: none;
  stroke: var(--color-gold-light);
  stroke-width: 2;
  stroke-linecap: round;
  filter: drop-shadow(0 0 6px rgba(210, 182, 111, 0.8));
  stroke-dasharray: 1 1;
  stroke-dashoffset: 1;
  opacity: 0;
}

.seal.is-breaking .seal__book { animation: seal-tremor 900ms var(--ease-ritual); }
@keyframes seal-tremor {
  0%, 100% { transform: translate3d(0, 0, 0); }
  25% { transform: translate3d(-1.5px, 1px, 0); }
  55% { transform: translate3d(1.5px, -1px, 0); }
  80% { transform: translate3d(-1px, 0, 0); }
}

.seal__title { margin: 0; }
.seal__title-line {
  display: block;
  font-family: var(--font-display);
  font-size: clamp(1.9rem, 5.2vw, 4.2rem);
  font-weight: 400;
  letter-spacing: 0.14em;
  line-height: 1.1;
  color: var(--ink);
}
.seal__subtitle {
  font-family: var(--font-serif);
  font-size: var(--size-lead);
  color: var(--color-sandstone);
  margin: var(--space-3) auto 0;
  max-width: 34ch;
}

.seal__actions {
  margin-top: var(--space-5);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  justify-content: center;
}

/* -- 7. Navigation & index ----------------------------------------- */

.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: var(--z-nav);
  background: transparent;
  transition: transform var(--dur-2) var(--ease-stone),
              background-color var(--dur-2) var(--ease-stone),
              backdrop-filter var(--dur-2) var(--ease-stone),
              border-color var(--dur-2) var(--ease-stone);
  border-bottom: 1px solid transparent;
}
.nav.is-solid {
  background: rgba(13, 15, 14, 0.72);
  backdrop-filter: blur(10px) saturate(0.9);
  border-bottom-color: var(--rule-soft);
}
.nav.is-hidden { transform: translateY(-102%); }
body.is-sealed .nav { opacity: 0; pointer-events: none; }

.nav__progress {
  height: 1px;
  background: rgba(215, 196, 155, 0.1);
}
.nav__progress-bar {
  display: block;
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, rgba(185, 147, 67, 0.35), var(--color-gold-light));
  transform-origin: 0 50%;
}

.nav__row {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: var(--space-3);
  min-height: var(--nav-h);
  padding: 0 var(--gutter);
}

.nav__brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  font-family: var(--font-display);
  font-size: var(--size-caption);
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--color-papyrus);
  text-decoration: none;
  justify-self: start;
}
.nav__brand-mark {
  width: 0.5rem; height: 0.5rem;
  border: 1px solid var(--color-gold);
  transform: rotate(45deg);
}
.nav__brand:hover { color: var(--color-ivory); }

.nav__current {
  justify-self: center;
  margin: 0;
  display: flex;
  align-items: baseline;
  gap: 0.6rem;
  font-size: var(--size-index);
  letter-spacing: var(--track-caption);
  text-transform: uppercase;
  color: var(--ink-dim);
  white-space: nowrap;
}
.nav__current-num { color: var(--color-gold); }
.nav__current-name { color: var(--color-papyrus); }

.nav__tools {
  justify-self: end;
  display: flex;
  align-items: center;
  gap: var(--space-1);
}
.nav__btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5em;
  min-height: 44px;
  padding: 0 0.85rem;
  background: none;
  border: 1px solid transparent;
  font-size: var(--size-index);
  letter-spacing: var(--track-caption);
  text-transform: uppercase;
  color: var(--ink-dim);
  cursor: pointer;
  transition: color var(--dur-1) var(--ease-stone), border-color var(--dur-1) var(--ease-stone);
}
.nav__btn:hover { color: var(--color-ivory); border-color: var(--rule-soft); }

.nav__lang { opacity: 0.4; transition: opacity var(--dur-1); }
.nav__lang-sep { opacity: 0.25; margin: 0 0.2em; }
html[lang='en'] .nav__lang[data-lang-en],
html[lang='zh-Hans'] .nav__lang[data-lang-zh] { opacity: 1; color: var(--color-gold-light); }

.nav__sound-icon { display: inline-flex; align-items: flex-end; gap: 2px; height: 0.75rem; }
.nav__sound-icon i {
  width: 2px; height: 30%;
  background: currentColor;
  opacity: 0.5;
}
.nav__sound-icon i:nth-child(2) { height: 60%; }
.nav__sound-icon i:nth-child(3) { height: 40%; }
#sound-toggle[aria-pressed='true'] { color: var(--color-gold-light); }
#sound-toggle[aria-pressed='true'] .nav__sound-icon i { opacity: 1; animation: sound-bob 2.4s ease-in-out infinite; }
#sound-toggle[aria-pressed='true'] .nav__sound-icon i:nth-child(2) { animation-delay: 0.4s; }
#sound-toggle[aria-pressed='true'] .nav__sound-icon i:nth-child(3) { animation-delay: 0.8s; }
@keyframes sound-bob { 0%, 100% { transform: scaleY(1); } 50% { transform: scaleY(1.7); } }

/* index overlay */
.index {
  position: fixed;
  inset: 0;
  z-index: var(--z-overlay);
  background: rgba(7, 8, 7, 0.94);
  backdrop-filter: blur(6px);
  opacity: 0;
  transition: opacity var(--dur-2) var(--ease-stone);
}
.index.is-open { opacity: 1; }

.index__bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  opacity: 0;
  filter: saturate(0.6) brightness(0.5);
  transition: opacity var(--dur-3) var(--ease-ritual);
}
.index__bg.is-visible { opacity: 0.3; }

.index__inner {
  position: relative;
  height: 100%;
  display: flex;
  flex-direction: column;
  padding: var(--gutter);
  overflow-y: auto;
  overscroll-behavior: contain;
}
.index__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--rule-soft);
}
.index__title {
  font-family: var(--font-body);
  font-size: var(--size-caption);
  font-weight: 400;
  letter-spacing: var(--track-caption);
  text-transform: uppercase;
  color: var(--ink-dim);
  margin: 0;
}

.index__list {
  list-style: none;
  margin: auto 0;
  padding: var(--space-5) 0;
  counter-reset: vol;
}
.index__item { border-bottom: 1px solid rgba(215, 196, 155, 0.07); }
.index__link {
  display: flex;
  align-items: baseline;
  gap: clamp(0.8rem, 3vw, 2.5rem);
  padding: clamp(0.6rem, 1.6vw, 1.1rem) 0;
  text-decoration: none;
  color: var(--color-muted);
  transition: color var(--dur-1) var(--ease-stone), padding-left var(--dur-2) var(--ease-stone);
}
.index__link:hover, .index__link:focus-visible { color: var(--ink); padding-left: 0.9rem; }
.index__num {
  font-family: var(--font-display);
  font-size: var(--size-index);
  letter-spacing: 0.2em;
  color: var(--color-gold);
  min-width: 3.2em;
}
.index__name {
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 4.4vw, 3.1rem);
  letter-spacing: 0.06em;
  line-height: 1.15;
}
.index__link[aria-current='true'] { color: var(--color-gold-light); }
.index__link[aria-current='true'] .index__num::after {
  content: '·';
  margin-left: 0.4em;
}

/* -- 8. Volume scaffolding ------------------------------------------ */

#content { position: relative; z-index: var(--z-content); }

.vol {
  position: relative;
  padding: var(--space-8) 0;
}
.vol--title {
  min-height: 100svh;
  display: grid;
  place-items: center;
  text-align: center;
}

.vol__frame {
  position: relative;
  width: min(100% - (var(--gutter) * 2), 82rem);
  margin-inline: auto;
}
.vol__frame--center { text-align: center; }
.vol__frame--center .lead,
.vol__frame--center .body { margin-inline: auto; }
html[lang='zh-Hans'] .vol__frame--center .lead,
html[lang='zh-Hans'] .vol__frame--center .body { text-align: center; }
.vol__frame--center .kicker { display: inline-block; }

/* stone-cut reveal used across the site */
.reveal { opacity: 0; }

/* -- 9. Vol. II — creation ------------------------------------------ */

.vol--creation {
  overflow: hidden;
  background: linear-gradient(180deg, var(--color-void) 0%, #090d11 55%, #0a1219 100%);
}
.creation__water {
  position: absolute;
  left: 0; right: 0; bottom: 0;
  width: 100%;
  height: 46vh;
  opacity: 0.55;
}
.creation__stars {
  position: absolute;
  inset: 0;
  background-repeat: no-repeat;
  opacity: 0;
}
.creation__sun {
  position: absolute;
  left: 50%;
  top: 46%;
  width: clamp(9rem, 22vw, 20rem);
  aspect-ratio: 1;
  translate: -50% -50%;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(210, 182, 111, 0.5) 0%, rgba(185, 147, 67, 0.15) 45%, transparent 70%);
  opacity: 0;
  filter: blur(2px);
}

.creation__intro { position: relative; padding-bottom: var(--space-6); }

.creation__stages {
  position: relative;
  list-style: none;
  margin: 0 auto;
  padding: 0;
  width: min(100% - (var(--gutter) * 2), 62rem);
  display: grid;
  gap: var(--space-8);
}
.creation__stage { position: relative; max-width: var(--measure-narrow); }
.creation__stage:nth-child(even) { margin-left: auto; text-align: right; }
.creation__stage:nth-child(even) .creation__rule { margin-left: auto; }
.creation__stage:nth-child(3) { margin-inline: auto; text-align: center; }
.creation__stage:nth-child(3) .creation__rule { margin-inline: auto; }

.creation__name {
  font-family: var(--font-display);
  font-size: clamp(1.4rem, 3.4vw, 2.6rem);
  letter-spacing: 0.22em;
  color: var(--ink);
  margin: 0;
}
.creation__role {
  font-size: var(--size-caption);
  letter-spacing: var(--track-caption);
  text-transform: uppercase;
  color: var(--color-gold);
  margin: var(--space-2) 0 0;
}
.creation__rule {
  width: 3rem; height: 1px;
  background: var(--rule);
  margin: var(--space-3) 0;
}
.creation__text { margin: 0; color: var(--ink-body); }

/* -- 10. Vol. III — hall of gods ------------------------------------ */

.vol--gods { overflow: hidden; }

.colonnade {
  position: absolute;
  inset: 0;
  overflow: hidden;
  opacity: 0.5;
}
.colonnade__pillar {
  position: absolute;
  top: 0; bottom: 0;
  width: clamp(2.5rem, 6vw, 6rem);
  background: linear-gradient(90deg,
    rgba(40, 37, 31, 0) 0%,
    rgba(40, 37, 31, 0.85) 22%,
    rgba(64, 58, 47, 0.55) 50%,
    rgba(40, 37, 31, 0.85) 78%,
    rgba(40, 37, 31, 0) 100%);
}
.colonnade__pillar:nth-child(1) { left: 2%; }
.colonnade__pillar:nth-child(2) { left: 16%; }
.colonnade__pillar:nth-child(3) { right: 16%; }
.colonnade__pillar:nth-child(4) { right: 2%; }
.colonnade__floor {
  position: absolute;
  left: 0; right: 0; bottom: 0;
  height: 30vh;
  background: linear-gradient(180deg, transparent, rgba(7, 8, 7, 0.9));
}

.gods__intro { margin-bottom: var(--space-7); }

.gods {
  display: grid;
  gap: var(--space-8);
  width: min(100% - (var(--gutter) * 2), 84rem);
  margin-inline: auto;
}

.god {
  --god-accent: var(--color-gold);
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 5fr) minmax(0, 6fr);
  gap: clamp(1.5rem, 4vw, 4.5rem);
  align-items: center;
}
.god:nth-child(even) { grid-template-columns: minmax(0, 6fr) minmax(0, 5fr); }
.god:nth-child(even) .god__plate { order: 2; }
.god:nth-child(even) .god__text { order: 1; text-align: right; }
.god:nth-child(even) .god__text .god__meta { justify-content: flex-end; }
.god:nth-child(even) .god__text .god__rule { margin-left: auto; }
.god:nth-child(even) .god__text .lead { margin-left: auto; }

.god__plate {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--rule-soft);
  background: var(--color-obsidian);
}
.god__plate::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(120% 90% at 50% 40%, transparent 40%, rgba(7, 8, 7, 0.6) 100%);
  pointer-events: none;
}
.god__img { width: 100%; }

.god__index {
  position: absolute;
  top: 0; left: 0;
  padding: 0.6rem 0.9rem;
  font-family: var(--font-display);
  font-size: var(--size-index);
  letter-spacing: 0.3em;
  color: var(--color-gold);
  background: rgba(7, 8, 7, 0.6);
  border-right: 1px solid var(--rule-soft);
  border-bottom: 1px solid var(--rule-soft);
  z-index: 1;
}

.god__text { position: relative; }
.god__name {
  font-family: var(--font-display);
  font-size: clamp(2rem, 5.2vw, 4.2rem);
  font-weight: 400;
  letter-spacing: 0.08em;
  line-height: 1;
  color: var(--ink);
  margin: 0;
}
.god__name-zh {
  display: block;
  font-family: var(--font-serif);
  font-size: 0.36em;
  letter-spacing: 0.5em;
  color: var(--color-sandstone);
  margin-top: 0.6em;
}
.god__title {
  font-size: var(--size-caption);
  letter-spacing: var(--track-caption);
  text-transform: uppercase;
  color: var(--god-accent);
  margin: var(--space-3) 0 0;
}
.god__rule { width: 4rem; height: 1px; background: var(--rule); margin: var(--space-4) 0; }
.god__desc { font-family: var(--font-serif); font-size: var(--size-lead); color: var(--color-papyrus); margin: 0; max-width: 38ch; }

.god__meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2) var(--space-4);
  margin: var(--space-4) 0 0;
  padding: 0;
  list-style: none;
}
.god__meta div { display: flex; flex-direction: column; gap: 0.15rem; }
.god__meta dt {
  font-size: var(--size-index);
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: rgba(148, 139, 120, 0.7);
}
.god__meta dd { margin: 0; font-size: 0.92em; color: var(--color-papyrus); }

.god__cta { margin-top: var(--space-5); }

/* record dialog */
.record {
  position: fixed;
  inset: 0;
  z-index: var(--z-overlay);
  display: grid;
  place-items: center;
  padding: clamp(0.75rem, 3vw, 3rem);
}
.record__scrim {
  position: absolute;
  inset: 0;
  background: rgba(7, 8, 7, 0.88);
  backdrop-filter: blur(4px);
  opacity: 0;
  transition: opacity var(--dur-2) var(--ease-stone);
}
.record.is-open .record__scrim { opacity: 1; }

.record__panel {
  position: relative;
  width: min(100%, 68rem);
  max-height: min(92svh, 60rem);
  overflow-y: auto;
  overscroll-behavior: contain;
  background:
    linear-gradient(180deg, rgba(23, 25, 22, 0.98), rgba(13, 15, 14, 0.99));
  border: 1px solid var(--rule);
  opacity: 0;
  transform: translateY(1.5rem);
  transition: opacity var(--dur-2) var(--ease-ritual), transform var(--dur-2) var(--ease-ritual);
}
.record.is-open .record__panel { opacity: 1; transform: none; }

.record__close {
  position: absolute;
  top: 0.75rem; right: 0.75rem;
  z-index: 3;
  background: rgba(7, 8, 7, 0.6);
}

.record__body { padding: clamp(1.5rem, 4vw, 3.5rem); }

.record__head {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.35fr);
  gap: clamp(1.25rem, 4vw, 3rem);
  align-items: start;
}
.record__figure {
  margin: 0;
  border: 1px solid var(--rule-soft);
  background: var(--color-void);
}
.record__cat {
  display: flex;
  justify-content: space-between;
  gap: var(--space-2);
  font-size: var(--size-index);
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--color-gold);
  padding-bottom: var(--space-3);
  border-bottom: 1px solid var(--rule-soft);
  margin-bottom: var(--space-4);
}
.record__name {
  font-family: var(--font-display);
  font-size: clamp(1.9rem, 4.6vw, 3.4rem);
  letter-spacing: 0.08em;
  line-height: 1;
  color: var(--ink);
  margin: 0;
}
.record__name span {
  display: block;
  font-family: var(--font-serif);
  font-size: 0.38em;
  letter-spacing: 0.42em;
  color: var(--color-sandstone);
  margin-top: 0.55em;
}
.record__title {
  font-size: var(--size-caption);
  letter-spacing: var(--track-caption);
  text-transform: uppercase;
  color: var(--record-accent, var(--color-gold));
  margin: var(--space-3) 0 0;
}
.record__quote {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: clamp(1.05rem, 1.9vw, 1.4rem);
  color: var(--color-papyrus);
  border-left: 1px solid var(--rule);
  padding-left: var(--space-3);
  margin: var(--space-4) 0 0;
}
.record__prose { margin-top: var(--space-5); }
.record__prose p { margin: 0 0 var(--space-3); }

.record__grid {
  margin: var(--space-5) 0 0;
  padding-top: var(--space-4);
  border-top: 1px solid var(--rule-soft);
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(13rem, 1fr));
  gap: var(--space-4);
}
.record__grid div { min-width: 0; }
.record__grid dt {
  font-size: var(--size-index);
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: rgba(148, 139, 120, 0.75);
  margin-bottom: 0.35rem;
}
.record__grid dd { margin: 0; color: var(--color-papyrus); font-size: 0.95em; }

.tags { display: flex; flex-wrap: wrap; gap: 0.4rem; list-style: none; margin: 0; padding: 0; }
.tags li {
  border: 1px solid var(--rule-soft);
  padding: 0.2rem 0.6rem;
  font-size: var(--size-index);
  letter-spacing: 0.12em;
  color: var(--color-papyrus);
}

.record__nav {
  position: sticky;
  bottom: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  padding: var(--space-3) clamp(1.5rem, 4vw, 3.5rem);
  background: rgba(13, 15, 14, 0.96);
  border-top: 1px solid var(--rule-soft);
}

/* -- 11. Vol. IV — the broken king ---------------------------------- */

.vol--myth { overflow: hidden; }
.myth__intro { margin-bottom: var(--space-7); }

.leaves {
  list-style: none;
  margin: 0 auto;
  padding: 0;
  width: min(100% - (var(--gutter) * 2), 78rem);
  display: grid;
  gap: var(--space-6);
}

.leaf {
  position: relative;
  padding: clamp(1.6rem, 4vw, 3.2rem);
  width: min(100%, 40rem);
  background:
    linear-gradient(180deg, rgba(40, 37, 31, 0.92), rgba(23, 25, 22, 0.92));
  background-image: url('assets/textures/papyrus.svg');
  background-size: 380px;
  background-blend-mode: overlay;
  border: 1px solid rgba(215, 196, 155, 0.1);
  color: var(--ink-body);
  /* torn edge */
  clip-path: polygon(
    0% 2%, 3% 0%, 24% 1.5%, 48% 0.4%, 71% 2%, 92% 0.6%, 100% 2.4%,
    98.6% 26%, 100% 51%, 98.8% 74%, 100% 97%, 93% 100%, 68% 98.4%,
    43% 100%, 19% 98.2%, 2% 100%, 0.8% 76%, 0% 50%, 1.2% 25%);
}
.leaf:nth-child(even) { margin-left: auto; }
.leaf:nth-child(3n) { margin-inline: auto; }

.leaf__num {
  font-family: var(--font-display);
  font-size: var(--size-index);
  letter-spacing: 0.34em;
  text-transform: uppercase;
  color: var(--color-oxide);
  margin: 0 0 var(--space-2);
}
.leaf__title {
  font-family: var(--font-display);
  font-size: clamp(1.3rem, 3.2vw, 2.2rem);
  letter-spacing: 0.14em;
  color: var(--ink);
  margin: 0 0 var(--space-3);
}
.leaf__text { margin: 0; }

/* the wound + the golden suture */
.leaf::before {
  content: '';
  position: absolute;
  top: 12%; bottom: 12%;
  left: -1px;
  width: 2px;
  background: linear-gradient(180deg, transparent, rgba(113, 64, 51, 0.9), transparent);
}
.leaf__suture {
  position: absolute;
  top: 0; bottom: 0;
  left: clamp(0.7rem, 2vw, 1.4rem);
  width: 12px;
  opacity: 0;
}
.leaf__suture path { fill: none; stroke: var(--color-gold); stroke-width: 1.2; }

.djed {
  position: relative;
  margin: var(--space-8) auto 0;
  text-align: center;
  color: var(--color-gold);
}
.djed__svg {
  width: clamp(4.5rem, 10vw, 8rem);
  height: auto;
  margin: 0 auto var(--space-5);
}
.djed__p { stroke-dasharray: 1 1; stroke-dashoffset: 1; }
.myth__closing { color: var(--ink); }

/* -- 12. Vol. V — the night journey --------------------------------- */

.vol--night {
  background: linear-gradient(180deg, #070807, #060a0e 40%, #070807);
  padding-bottom: 0;
}
.night__pin {
  position: relative;
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  overflow: hidden;
}
.night__intro { padding-block: var(--space-6); }
.night__hint { margin-top: var(--space-4); color: var(--color-gold); }

.night__track {
  position: relative;
  padding-block: var(--space-5) var(--space-7);
}
.night__hours {
  display: flex;
  align-items: stretch;
  gap: clamp(1.5rem, 4vw, 4rem);
  list-style: none;
  margin: 0;
  padding-inline: var(--gutter);
  will-change: transform;
}
.night__hour {
  flex: 0 0 min(22rem, 74vw);
  border-left: 1px solid var(--rule-soft);
  padding-left: var(--space-3);
}
.night__hour-num {
  font-family: var(--font-display);
  font-size: var(--size-index);
  letter-spacing: 0.3em;
  color: var(--color-gold);
  margin: 0 0 var(--space-2);
}
.night__hour-title {
  font-family: var(--font-display);
  font-size: clamp(1.15rem, 2.4vw, 1.75rem);
  letter-spacing: 0.1em;
  color: var(--ink);
  margin: 0 0 var(--space-3);
}
.night__hour-text { margin: 0; font-size: 0.95em; }
.night__hour--peril { border-left-color: rgba(113, 64, 51, 0.7); }
.night__hour--peril .night__hour-num { color: var(--color-oxide); }

.night__barque {
  position: absolute;
  left: 50%;
  bottom: 0;
  width: clamp(11rem, 22vw, 19rem);
  translate: -50% 0;
  opacity: 0.9;
  filter: drop-shadow(0 0 2rem rgba(185, 147, 67, 0.25));
  pointer-events: none;
}
.night__serpent {
  position: absolute;
  left: 0; bottom: 12%;
  width: 180%;
  max-width: none;
  opacity: 0;
  pointer-events: none;
}

/* -- 13. Vol. VI — the weighing ------------------------------------- */

.vol--scales {
  background: linear-gradient(180deg, #070807, #0c0d0b 50%, #070807);
}
.scales__intro { margin-bottom: var(--space-6); }

.scales {
  margin: 0 auto;
  width: min(100% - (var(--gutter) * 2), 62rem);
}
.scales__svg { width: 100%; height: auto; }
.scales__svg g { fill: none; stroke-linecap: round; stroke-linejoin: round; }
.scales__hall { stroke: rgba(215, 196, 155, 0.1); stroke-width: 1.5; }
.scales__figures { stroke: rgba(148, 139, 120, 0.4); stroke-width: 2; }
.scales__osiris { fill: rgba(40, 88, 73, 0.35); stroke: rgba(185, 147, 67, 0.5); }
.scales__ammit { stroke: rgba(113, 64, 51, 0.55); }
.scales__rig { stroke: var(--color-gold); stroke-width: 2.4; }
.scales__anubis { stroke: rgba(148, 139, 120, 0.75); stroke-width: 2.2; }
.scales__beam { transform-origin: 450px 120px; }
.scales__heart path { fill: rgba(113, 64, 51, 0.55); stroke: var(--color-oxide); }
.scales__feather { stroke: var(--color-papyrus); stroke-width: 2; }

.scales__legend {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2) var(--space-4);
  justify-content: center;
  margin-top: var(--space-4);
}
.scales__legend-item {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: var(--size-index);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-dim);
}

.scales__panel {
  text-align: center;
  margin-top: var(--space-6);
  padding-inline: var(--gutter);
}
.scales__result {
  min-height: 5.5rem;
  margin: var(--space-5) auto 0;
  max-width: 44ch;
}
.scales__verdict {
  font-family: var(--font-display);
  font-size: clamp(1.15rem, 2.6vw, 1.9rem);
  letter-spacing: 0.08em;
  color: var(--color-gold-light);
  margin: 0;
}
.scales__gloss { margin: var(--space-3) 0 0; color: var(--ink-dim); font-size: 0.95em; }
.scales__note { margin-top: var(--space-5); opacity: 0.6; max-width: 52ch; margin-inline: auto; }

body.is-weighing { --dust-quiet: 1; }

/* -- 14. Vol. VII — signs ------------------------------------------- */

.signs {
  list-style: none;
  margin: var(--space-7) auto 0;
  padding: 0;
  width: min(100% - (var(--gutter) * 2), 84rem);
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(17rem, 100%), 1fr));
  gap: 1px;
  background: var(--rule-soft);
  border: 1px solid var(--rule-soft);
}

.sign {
  position: relative;
  background: var(--color-obsidian);
  transition: background-color var(--dur-2) var(--ease-stone);
}
.sign.is-open { background: #101312; }

.sign__btn {
  display: block;
  width: 100%;
  padding: clamp(1.4rem, 3vw, 2.4rem);
  background: none;
  border: 0;
  text-align: left;
  cursor: pointer;
}
.sign__glow {
  position: absolute;
  top: 18%; left: 50%;
  width: 62%;
  aspect-ratio: 1;
  translate: -50% 0;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(185, 147, 67, 0.16), transparent 68%);
  opacity: 0;
  transition: opacity var(--dur-2) var(--ease-stone);
  pointer-events: none;
}
.sign:hover .sign__glow,
.sign.is-open .sign__glow { opacity: 1; }

.sign__art {
  position: relative;
  width: clamp(5rem, 9vw, 7rem);
  margin: 0 auto var(--space-4);
  transition: transform 700ms var(--ease-stone);
}
.sign__art svg { width: 100%; height: auto; overflow: visible; }
.sign__art [data-draw] {
  fill: none;
  stroke: var(--color-gold);
  stroke-width: 3.2;
  stroke-linecap: round;
  stroke-linejoin: round;
  transition: stroke var(--dur-2) var(--ease-stone);
}
.sign:hover .sign__art [data-draw],
.sign.is-open .sign__art [data-draw] { stroke: var(--color-gold-light); }

.sign__cat {
  font-family: var(--font-mono);
  font-size: var(--size-index);
  letter-spacing: 0.16em;
  color: rgba(148, 139, 120, 0.65);
  margin: 0 0 var(--space-2);
  text-align: center;
}
.sign__name {
  font-family: var(--font-display);
  font-size: clamp(1.05rem, 1.9vw, 1.35rem);
  letter-spacing: 0.14em;
  color: var(--ink);
  margin: 0;
  text-align: center;
}
.sign__name span {
  display: block;
  font-family: var(--font-serif);
  font-size: 0.78em;
  letter-spacing: 0.3em;
  color: var(--color-sandstone);
  margin-top: 0.35em;
}
.sign__meaning {
  text-align: center;
  font-size: var(--size-index);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-gold);
  margin: var(--space-3) 0 0;
}

.sign__record {
  padding: 0 clamp(1.4rem, 3vw, 2.4rem);
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows var(--dur-2) var(--ease-ritual);
}
.sign.is-open .sign__record { grid-template-rows: 1fr; }
.sign__record > div { overflow: hidden; }
.sign__record dl { margin: 0 0 var(--space-3); }
.sign__record dt {
  font-size: var(--size-index);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: rgba(148, 139, 120, 0.7);
  margin-top: var(--space-2);
}
.sign__record dd { margin: 0.2rem 0 0; color: var(--color-papyrus); font-size: 0.92em; }
.sign__text { margin: 0; padding-bottom: clamp(1.4rem, 3vw, 2.4rem); font-size: 0.94em; }

.signs__hint { text-align: center; margin-top: var(--space-4); }

/* -- 15. Vol. VIII — lineage ---------------------------------------- */

.vol--lineage { background: linear-gradient(180deg, #070807, #080b10 50%, #070807); }

.lineage {
  width: min(100% - (var(--gutter) * 2), 84rem);
  margin: var(--space-7) auto 0;
  display: grid;
  grid-template-columns: minmax(0, 1.9fr) minmax(0, 1fr);
  gap: clamp(1.5rem, 4vw, 3.5rem);
  align-items: start;
}

.lineage__map {
  position: relative;
  aspect-ratio: 4 / 3.4;
  border: 1px solid var(--rule-soft);
  background:
    radial-gradient(80% 70% at 50% 40%, rgba(23, 68, 95, 0.16), transparent 70%),
    var(--color-void);
}
.lineage__svg { position: absolute; inset: 0; width: 100%; height: 100%; }
.lineage__edge {
  stroke: rgba(215, 196, 155, 0.16);
  stroke-width: 0.16;
  fill: none;
  vector-effect: non-scaling-stroke;
  transition: stroke var(--dur-2) var(--ease-stone), opacity var(--dur-2) var(--ease-stone);
}
.lineage__edge--union { stroke-dasharray: 1.2 1.2; }
.lineage__edge.is-lit { stroke: var(--color-gold); opacity: 1; }
.lineage__map.has-selection .lineage__edge { opacity: 0.22; }
.lineage__map.has-selection .lineage__edge.is-lit { opacity: 1; }

.lineage__nodes { position: absolute; inset: 0; list-style: none; margin: 0; padding: 0; }
.lineage__node { position: absolute; translate: -50% -50%; }

.star {
  display: grid;
  justify-items: center;
  gap: 0.45rem;
  padding: 0.5rem 0.6rem;
  background: none;
  border: 1px solid transparent;
  cursor: pointer;
  color: var(--ink-dim);
  transition: color var(--dur-1) var(--ease-stone), opacity var(--dur-2) var(--ease-stone);
}
.star__dot {
  position: relative;
  width: 0.5rem; height: 0.5rem;
  border-radius: 50%;
  background: var(--color-papyrus);
  box-shadow: 0 0 0.6rem rgba(215, 196, 155, 0.5);
  transition: background-color var(--dur-1), box-shadow var(--dur-2), transform var(--dur-2) var(--ease-stone);
}
.star[data-mag='3'] .star__dot { width: 0.7rem; height: 0.7rem; }
.star__label {
  font-family: var(--font-display);
  font-size: var(--size-index);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  white-space: nowrap;
}
.star:hover, .star:focus-visible { color: var(--ink); }
.star:hover .star__dot { transform: scale(1.3); }
.star[aria-pressed='true'] { color: var(--color-gold-light); }
.star[aria-pressed='true'] .star__dot {
  background: var(--color-gold-light);
  box-shadow: 0 0 1.4rem rgba(210, 182, 111, 0.9);
  transform: scale(1.4);
}
.lineage__map.has-selection .star:not([aria-pressed='true']):not(.is-related) { opacity: 0.3; }
.star.is-related { color: var(--color-papyrus); }

.lineage__aside {
  border: 1px solid var(--rule-soft);
  padding: clamp(1.2rem, 3vw, 2rem);
  background: rgba(13, 15, 14, 0.7);
  min-height: 16rem;
}
.lineage__aside .caption { color: var(--color-gold); }
.lineage__name {
  font-family: var(--font-display);
  font-size: clamp(1.4rem, 2.6vw, 2rem);
  letter-spacing: 0.1em;
  color: var(--ink);
  margin: var(--space-2) 0 0;
}
.lineage__name span {
  display: block;
  font-family: var(--font-serif);
  font-size: 0.6em;
  letter-spacing: 0.35em;
  color: var(--color-sandstone);
  margin-top: 0.4em;
}
.lineage__aside dl { margin: var(--space-4) 0 0; }
.lineage__aside dt {
  font-size: var(--size-index);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: rgba(148, 139, 120, 0.7);
  margin-top: var(--space-3);
}
.lineage__aside dd { margin: 0.2rem 0 0; color: var(--color-papyrus); font-size: 0.93em; }
.lineage__aside .btn { margin-top: var(--space-4); }

.lineage__hint { text-align: center; margin-top: var(--space-4); }

/* mobile generation list, hidden on desktop */
.lineage__gens { display: none; }

/* -- 16. Vol. IX — field of reeds ----------------------------------- */

.vol--reeds {
  position: relative;
  overflow: hidden;
  background: linear-gradient(180deg, #070807 0%, #12140f 40%, #1b1c14 100%);
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.reeds__sky {
  position: absolute;
  inset: 0;
  background: radial-gradient(80% 55% at 50% 78%, rgba(210, 182, 111, 0.22), transparent 65%);
  opacity: 0;
}
.reeds__art {
  position: absolute;
  left: 0; right: 0; bottom: 0;
  width: 100%;
  opacity: 0.55;
}
.reeds__text { position: relative; padding-block: var(--space-6); }
.reeds__end { margin-top: var(--space-5); color: var(--color-gold-light); }
.reeds__actions {
  margin-top: var(--space-5);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  justify-content: center;
}

.closing-book {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 3;
}
.closing-book__leaf {
  position: absolute;
  top: 0; bottom: 0;
  width: 50%;
  background: linear-gradient(90deg, rgba(13, 15, 14, 0.98), rgba(23, 25, 22, 0.9));
  transform: scaleX(0);
}
.closing-book__leaf--l { left: 0; transform-origin: left center; }
.closing-book__leaf--r { right: 0; transform-origin: right center; }

/* -- 17. Footer & floating controls --------------------------------- */

.colophon {
  width: min(100% - (var(--gutter) * 2), 62rem);
  margin: 0 auto;
  padding: var(--space-6) 0 var(--space-7);
  border-top: 1px solid var(--rule-soft);
  text-align: center;
  display: grid;
  gap: var(--space-2);
  text-transform: none;
  letter-spacing: 0.04em;
}
.colophon .caption { text-transform: none; letter-spacing: 0.03em; line-height: 1.7; }

.to-top {
  position: fixed;
  right: clamp(0.9rem, 2vw, 2rem);
  bottom: clamp(0.9rem, 2vw, 2rem);
  z-index: 50;
  width: 44px; height: 44px;
  display: grid;
  place-items: center;
  background: rgba(13, 15, 14, 0.8);
  border: 1px solid var(--rule);
  color: var(--color-gold-light);
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(0.5rem);
  transition: opacity var(--dur-2) var(--ease-stone),
              transform var(--dur-2) var(--ease-stone),
              visibility var(--dur-2) linear;
}
.to-top.is-visible { opacity: 1; visibility: visible; transform: none; }

.noscript {
  position: relative;
  z-index: 5;
  width: min(100% - 2rem, 46rem);
  margin: 8rem auto;
  padding: 1.5rem;
  border: 1px solid var(--rule);
  color: var(--color-papyrus);
}

.boot-warning {
  position: fixed;
  inset: auto 0 0 0;
  z-index: 300;
  padding: 1.25rem var(--gutter);
  background: var(--color-charcoal);
  border-top: 1px solid var(--rule);
  color: var(--color-papyrus);
  font-size: 0.9rem;
}
.boot-warning p { margin: 0 0 0.4rem; }
.boot-warning code { font-family: var(--font-mono); color: var(--color-gold-light); }
body.boot-failed .seal { display: none; }
body.boot-failed { overflow: auto; }

/* -- 18. Responsive -------------------------------------------------- */

@media (max-width: 1100px) {
  .lineage { grid-template-columns: 1fr; }
  .lineage__map { aspect-ratio: 4 / 4.2; }
  .record__head { grid-template-columns: 1fr; }
  .record__figure { max-width: 22rem; }
}

@media (max-width: 860px) {
  :root { --space-7: 5rem; --space-8: 6.5rem; --nav-h: 3.6rem; }

  .nav__row { grid-template-columns: 1fr auto; row-gap: 0; }
  .nav__current { display: none; }

  .god,
  .god:nth-child(even) { grid-template-columns: 1fr; gap: var(--space-4); }
  .god:nth-child(even) .god__plate { order: 0; }
  .god:nth-child(even) .god__text { order: 0; text-align: left; }
  .god:nth-child(even) .god__text .god__rule,
  .god:nth-child(even) .god__text .lead { margin-left: 0; }
  .god__plate { max-width: 26rem; }

  .creation__stage,
  .creation__stage:nth-child(even),
  .creation__stage:nth-child(3) { margin: 0; text-align: left; max-width: none; }
  .creation__stage:nth-child(even) .creation__rule,
  .creation__stage:nth-child(3) .creation__rule { margin-inline: 0; }
  .creation__stages { gap: var(--space-6); }

  .leaf,
  .leaf:nth-child(even),
  .leaf:nth-child(3n) { width: 100%; margin: 0; }

  /* the horizontal journey becomes a vertical read */
  .night__pin { min-height: 0; display: block; overflow: visible; }
  .night__track { padding-block: var(--space-5); }
  .night__hours {
    display: grid;
    gap: var(--space-5);
    transform: none !important;
    padding-inline: 0;
  }
  .night__hour { flex: none; }
  .night__barque {
    position: relative;
    left: auto; bottom: auto;
    translate: none;
    margin: var(--space-5) auto 0;
    width: min(15rem, 60vw);
  }
  .night__serpent { display: none; }

  .index__link:hover, .index__link:focus-visible { padding-left: 0; }
}

@media (max-width: 640px) {
  .signs { grid-template-columns: 1fr; }

  .record__panel { max-height: 94svh; }
  .record__nav { padding-inline: 1.25rem; }
  .record__nav .btn { flex: 1 1 auto; padding-inline: 0.6rem; }
  .record__count { display: none; }

  .lineage__map { display: none; }
  .lineage__gens { display: block; }
  .lineage__gen { border-top: 1px solid var(--rule-soft); }
  .lineage__gen summary {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: var(--space-3);
    padding: 0.95rem 0.25rem;
    min-height: 44px;
    cursor: pointer;
    font-size: var(--size-caption);
    letter-spacing: var(--track-caption);
    text-transform: uppercase;
    color: var(--color-papyrus);
  }
  .lineage__gen summary::-webkit-details-marker { display: none; }
  .lineage__gen summary::after { content: '+'; color: var(--color-gold); }
  .lineage__gen[open] summary::after { content: '–'; }
  .lineage__gen ul { list-style: none; margin: 0 0 var(--space-3); padding: 0 0 0 var(--space-3); border-left: 1px solid var(--rule-soft); }
  .lineage__gen li { padding: 0.15rem 0; }
  .lineage__gen .star { justify-items: start; grid-auto-flow: column; justify-content: start; min-height: 44px; }

  .scales__legend { gap: var(--space-2); }
  .colophon { padding-bottom: var(--space-6); }
}

@media (max-width: 400px) {
  .nav__btn { padding-inline: 0.55rem; }
  .btn { padding-inline: 1.2rem; }
}

@media (hover: none) {
  .btn:hover::after { opacity: 0; }
}

/* -- 19. Reduced motion ---------------------------------------------- */

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  .dust { display: none; }
  .grain { opacity: 0.03; }

  .reveal { opacity: 1 !important; transform: none !important; }
  .creation__stars, .creation__sun, .reeds__sky { opacity: 1; }
  .leaf__suture { opacity: 1; }
  .night__hours { transform: none !important; }
  .closing-book__leaf { display: none; }
  .seal__crack-line { display: none; }
}

/* honour the JS-level toggle as well (body[data-motion='reduced']) */
body[data-motion='reduced'] .dust { display: none; }
body[data-motion='reduced'] .reveal { opacity: 1 !important; transform: none !important; }
