:root {
  --ink: #0b0b0d;
  --ink-soft: #141416;
  --paper: #e9e3d8;
  --paper-dim: #b9b0a2;
  --vermilion: #d13b28;
  --vermilion-dark: #711d18;
  --gold: #b79a5b;
  --line: rgba(233, 227, 216, 0.18);
  --serif: "Yu Mincho", "Hiragino Mincho ProN", "Noto Serif JP", Georgia, serif;
  --sans: "Helvetica Neue", "Hiragino Kaku Gothic ProN", "Yu Gothic", Arial, sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  background: var(--ink);
}

body {
  margin: 0;
  color: var(--paper);
  background:
    radial-gradient(circle at 80% 10%, rgba(116, 25, 20, 0.14), transparent 30rem),
    var(--ink);
  font-family: var(--sans);
  line-height: 1.7;
  overflow-x: hidden;
}

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

a {
  color: inherit;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

.grain {
  position: fixed;
  inset: -50%;
  z-index: 50;
  pointer-events: none;
  opacity: 0.055;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 180 180' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.95' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.72'/%3E%3C/svg%3E");
  animation: grain 0.18s steps(2) infinite;
}

@keyframes grain {
  0% { transform: translate3d(0, 0, 0); }
  25% { transform: translate3d(2%, -3%, 0); }
  50% { transform: translate3d(-3%, 2%, 0); }
  75% { transform: translate3d(3%, 3%, 0); }
  100% { transform: translate3d(-2%, -2%, 0); }
}

.cursor-aura {
  position: fixed;
  width: 26rem;
  height: 26rem;
  z-index: 0;
  pointer-events: none;
  border-radius: 50%;
  opacity: 0;
  transform: translate(-50%, -50%);
  background: radial-gradient(circle, rgba(209, 59, 40, 0.08), rgba(209, 59, 40, 0) 68%);
  transition: opacity 0.5s ease;
}

.scroll-meter {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  z-index: 100;
  background: rgba(255, 255, 255, 0.04);
}

.scroll-meter span {
  display: block;
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, var(--vermilion), var(--gold));
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 30;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 5.6rem;
  padding: 0.8rem clamp(1.2rem, 4vw, 4.5rem);
  border-bottom: 1px solid transparent;
  transition: background 0.4s ease, border-color 0.4s ease, min-height 0.4s ease;
}

.site-header.scrolled {
  min-height: 4.5rem;
  background: rgba(11, 11, 13, 0.86);
  border-color: var(--line);
  backdrop-filter: blur(18px);
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  text-decoration: none;
}

.brand-seal,
.footer-seal {
  display: grid;
  place-items: center;
  width: 2.5rem;
  aspect-ratio: 1;
  color: #f3e9d9;
  background: var(--vermilion);
  border: 1px solid rgba(255, 255, 255, 0.28);
  font-family: var(--serif);
  font-size: 1.45rem;
  line-height: 1;
  box-shadow: inset 0 0 0 3px rgba(90, 10, 8, 0.25);
}

.brand-copy {
  display: grid;
  line-height: 1.05;
}

.brand-copy strong {
  font-family: var(--serif);
  font-size: 0.95rem;
  letter-spacing: 0.2em;
}

.brand-copy small {
  margin-top: 0.35rem;
  color: var(--paper-dim);
  font-size: 0.52rem;
  letter-spacing: 0.28em;
}

.site-header nav {
  display: flex;
  gap: clamp(1.5rem, 4vw, 4rem);
}

.site-header nav a {
  position: relative;
  color: var(--paper-dim);
  font-family: var(--serif);
  font-size: 0.78rem;
  letter-spacing: 0.16em;
  text-decoration: none;
}

.site-header nav a::after {
  position: absolute;
  right: 0;
  bottom: -0.65rem;
  left: 0;
  height: 1px;
  content: "";
  background: var(--vermilion);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 0.35s ease;
}

.site-header nav a:hover::after {
  transform: scaleX(1);
  transform-origin: left;
}

.site-header nav a[aria-current="page"] {
  color: var(--paper);
}

.site-header nav a[aria-current="page"]::after {
  transform: scaleX(1);
}

.language-switcher {
  display: inline-flex;
  align-items: center;
  gap: 0.2rem;
  padding: 0.22rem;
  border: 1px solid rgba(233, 227, 216, 0.14);
  border-radius: 999px;
  background: rgba(9, 9, 11, 0.42);
  backdrop-filter: blur(12px);
}

.language-switcher button {
  min-width: 3.2rem;
  padding: 0.42rem 0.65rem;
  color: var(--paper-dim);
  border: 0;
  border-radius: 999px;
  background: transparent;
  font-size: 0.5rem;
  letter-spacing: 0.08em;
  cursor: pointer;
  transition: color 0.25s ease, background 0.25s ease;
}

.language-switcher button:hover,
.language-switcher button.active {
  color: var(--paper);
  background: rgba(209, 59, 40, 0.42);
}

.language-switcher.floating {
  position: fixed;
  top: 1rem;
  right: 1rem;
  z-index: 20;
}

.header-mark {
  color: var(--gold);
  font-family: var(--serif);
  font-size: 0.68rem;
  letter-spacing: 0.18em;
  text-decoration: none;
}

.sound-toggle {
  display: flex;
  align-items: center;
  gap: 3px;
  color: var(--paper-dim);
  border: 0;
  background: transparent;
  cursor: pointer;
}

.sound-toggle span {
  width: 1px;
  height: 0.7rem;
  background: currentColor;
  transition: height 0.25s ease;
}

.sound-toggle span:nth-child(2) {
  height: 1.05rem;
}

.sound-toggle[aria-pressed="true"] span {
  animation: soundbar 0.8s ease-in-out infinite alternate;
}

.sound-toggle[aria-pressed="true"] span:nth-child(2) {
  animation-delay: -0.25s;
}

.sound-toggle[aria-pressed="true"] span:nth-child(3) {
  animation-delay: -0.5s;
}

@keyframes soundbar {
  from { height: 0.35rem; }
  to { height: 1.15rem; }
}

.sound-toggle em {
  margin-left: 0.45rem;
  font-size: 0.52rem;
  font-style: normal;
  letter-spacing: 0.22em;
}

.hero {
  position: relative;
  display: grid;
  place-items: center;
  min-height: 100svh;
  overflow: hidden;
  isolation: isolate;
  background:
    linear-gradient(180deg, rgba(11, 11, 13, 0.15), rgba(11, 11, 13, 0.05) 55%, var(--ink)),
    radial-gradient(circle at 50% 42%, #292326 0, #111114 42%, #09090b 72%);
}

#ink-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0.68;
}

.sun-disc {
  position: absolute;
  top: 18%;
  left: 50%;
  width: min(34vw, 32rem);
  aspect-ratio: 1;
  border-radius: 50%;
  background:
    radial-gradient(circle at 38% 35%, rgba(255, 206, 150, 0.35), transparent 22%),
    linear-gradient(145deg, #c74a37, #8f251e 70%);
  box-shadow:
    0 0 8rem rgba(173, 41, 29, 0.2),
    inset 0 0 3rem rgba(69, 7, 6, 0.28);
  transform: translateX(-50%);
  filter: saturate(0.9);
}

.sun-disc::before,
.sun-disc::after {
  position: absolute;
  border-radius: 50%;
  content: "";
  border: 1px solid rgba(226, 189, 127, 0.22);
}

.sun-disc::before {
  inset: -1.8rem;
}

.sun-disc::after {
  inset: -4rem;
  border-color: rgba(226, 189, 127, 0.08);
}

.mountains {
  position: absolute;
  right: -5%;
  bottom: 2%;
  left: -5%;
  height: 40%;
  transform-origin: 50% 100%;
  clip-path: polygon(0 88%, 9% 70%, 18% 76%, 29% 38%, 35% 58%, 43% 49%, 54% 71%, 64% 26%, 70% 50%, 79% 64%, 88% 43%, 100% 69%, 100% 100%, 0 100%);
}

.mountain-back {
  opacity: 0.55;
  background: #1a1a1d;
  filter: blur(1px);
}

.mountain-front {
  bottom: -8%;
  height: 38%;
  opacity: 0.9;
  background: #09090b;
  clip-path: polygon(0 68%, 12% 48%, 20% 61%, 31% 51%, 39% 71%, 51% 43%, 61% 62%, 72% 50%, 81% 67%, 91% 43%, 100% 56%, 100% 100%, 0 100%);
}

.torii {
  position: absolute;
  right: 11%;
  bottom: 7%;
  width: 10rem;
  height: 14rem;
  opacity: 0.7;
  filter: drop-shadow(0 1rem 1rem rgba(0, 0, 0, 0.45));
}

.torii span {
  position: absolute;
  display: block;
  background: #1a1515;
}

.torii-cap {
  top: 0;
  left: -10%;
  width: 120%;
  height: 0.75rem;
  border-radius: 70% 70% 10% 10%;
  transform: perspective(8rem) rotateX(-18deg);
}

.torii-beam {
  top: 1.4rem;
  left: 0;
  width: 100%;
  height: 1.1rem;
}

.torii-post {
  top: 1.4rem;
  width: 0.9rem;
  height: 12.5rem;
}

.torii-post.left {
  left: 18%;
  transform: skewX(-2deg);
}

.torii-post.right {
  right: 18%;
  transform: skewX(2deg);
}

.hero-copy {
  position: relative;
  z-index: 4;
  margin-top: -2rem;
  text-align: center;
}

.eyebrow,
.kicker {
  margin: 0 0 1.3rem;
  color: var(--gold);
  font-size: 0.62rem;
  font-weight: 600;
  letter-spacing: 0.42em;
}

.hero h1 {
  display: flex;
  justify-content: center;
  gap: clamp(0.1rem, 1.4vw, 1.5rem);
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(4.8rem, 13vw, 10.5rem);
  font-weight: 500;
  line-height: 0.95;
  letter-spacing: 0.02em;
  text-shadow: 0 0.05em 0.25em rgba(0, 0, 0, 0.55);
}

.hero h1 span {
  display: inline-block;
  animation: title-float 7s ease-in-out infinite;
}

.hero h1 span:nth-child(2) { animation-delay: -1.5s; }
.hero h1 span:nth-child(3) { animation-delay: -3s; }
.hero h1 span:nth-child(4) { animation-delay: -4.5s; }

@keyframes title-float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-0.08em); }
}

.hero-romaji {
  margin: 1.25rem 0 0;
  color: var(--paper-dim);
  font-size: 0.72rem;
  letter-spacing: 0.8em;
  text-indent: 0.8em;
}

.hero-intro {
  margin: 2.5rem 0 0;
  font-family: var(--serif);
  font-size: clamp(1rem, 2vw, 1.25rem);
  letter-spacing: 0.15em;
}

.hero-intro span {
  color: var(--paper-dim);
  font-family: var(--sans);
  font-size: 0.62rem;
  letter-spacing: 0.3em;
}

.scroll-cue {
  position: absolute;
  bottom: 2.5rem;
  left: 50%;
  z-index: 5;
  display: grid;
  justify-items: center;
  gap: 0.8rem;
  color: var(--paper-dim);
  font-size: 0.5rem;
  letter-spacing: 0.3em;
  text-decoration: none;
  transform: translateX(-50%);
}

.scroll-cue i {
  position: relative;
  width: 1px;
  height: 2.5rem;
  overflow: hidden;
  background: rgba(255, 255, 255, 0.18);
}

.scroll-cue i::after {
  position: absolute;
  top: -100%;
  left: 0;
  width: 100%;
  height: 100%;
  content: "";
  background: var(--gold);
  animation: scroll-line 2s ease-in-out infinite;
}

@keyframes scroll-line {
  0% { transform: translateY(0); }
  100% { transform: translateY(200%); }
}

.hero-index {
  position: absolute;
  bottom: 3.2rem;
  left: 3.5rem;
  display: flex;
  gap: 0.8rem;
  color: rgba(233, 227, 216, 0.48);
  font-family: var(--serif);
  font-size: 0.58rem;
  letter-spacing: 0.2em;
  writing-mode: vertical-rl;
}

.section-shell {
  width: min(1180px, calc(100% - 3rem));
  margin: 0 auto;
}

.chronicle {
  padding-top: clamp(7rem, 13vw, 12rem);
  padding-bottom: clamp(7rem, 13vw, 12rem);
}

.section-heading {
  max-width: 48rem;
  margin-bottom: clamp(5rem, 9vw, 9rem);
}

.section-heading h2,
.chamber-intro h2,
.epilogue h2 {
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(2rem, 5vw, 4.6rem);
  font-weight: 500;
  line-height: 1.25;
  letter-spacing: 0.06em;
}

.section-heading > p:last-child,
.chamber-intro > p:last-child {
  max-width: 39rem;
  margin: 1.5rem 0 0;
  color: var(--paper-dim);
  font-family: Georgia, serif;
  font-size: 0.92rem;
}

.timeline {
  position: relative;
}

.timeline-line {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  width: 1px;
  background: rgba(233, 227, 216, 0.1);
}

.timeline-line span {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 0;
  background: linear-gradient(var(--vermilion), var(--gold));
}

.era-card {
  position: relative;
  display: grid;
  grid-template-columns: 0.35fr 1fr 1fr;
  align-items: center;
  min-height: 28rem;
  margin-bottom: 5rem;
}

.era-card.reverse {
  grid-template-columns: 1fr 1fr 0.35fr;
}

.era-card.reverse .era-year {
  grid-column: 3;
  grid-row: 1;
  text-align: left;
}

.era-card.reverse .era-visual {
  grid-column: 2;
  grid-row: 1;
}

.era-card.reverse .era-copy {
  grid-column: 1;
  grid-row: 1;
  padding-right: 4rem;
  padding-left: 0;
  text-align: right;
}

.era-year {
  color: var(--gold);
  font-family: Georgia, serif;
  font-size: 0.64rem;
  line-height: 1.5;
  letter-spacing: 0.18em;
  text-align: right;
}

.era-visual {
  position: relative;
  justify-self: center;
  width: min(23vw, 17rem);
  aspect-ratio: 1;
  transition: transform 0.7s cubic-bezier(0.2, 0.75, 0.2, 1);
}

.era-card:hover .era-visual {
  transform: rotate(4deg) scale(1.04);
}

.era-visual::before {
  position: absolute;
  inset: 10%;
  border: 1px solid rgba(183, 154, 91, 0.24);
  border-radius: 50%;
  content: "";
}

.era-visual::after {
  position: absolute;
  inset: 0;
  border: 1px solid rgba(233, 227, 216, 0.09);
  border-radius: 50%;
  content: "";
  animation: slow-spin 22s linear infinite;
}

@keyframes slow-spin {
  to { transform: rotate(360deg); }
}

.jomon-mark span {
  position: absolute;
  inset: 20%;
  border: 0.8rem double var(--vermilion-dark);
  border-radius: 43% 57% 44% 56%;
  transform: rotate(35deg);
}

.jomon-mark span:nth-child(2) {
  inset: 31%;
  border-width: 0.25rem;
  transform: rotate(95deg);
}

.jomon-mark span:nth-child(3) {
  inset: 43%;
  border-width: 0.4rem;
  background: var(--vermilion);
  transform: rotate(145deg);
}

.heian-mark span {
  position: absolute;
  border-radius: 50%;
}

.heian-mark span:first-child {
  inset: 19%;
  background: var(--gold);
  box-shadow: 0 0 3rem rgba(183, 154, 91, 0.22);
}

.heian-mark span:nth-child(2) {
  inset: 12% 12% 26% 28%;
  background: var(--ink);
}

.heian-mark span:nth-child(3) {
  right: 14%;
  bottom: 18%;
  width: 33%;
  height: 1px;
  border-radius: 0;
  background: var(--vermilion);
  transform: rotate(-35deg);
  box-shadow: 0 -0.7rem 0 rgba(209, 59, 40, 0.7), 0 0.7rem 0 rgba(209, 59, 40, 0.4);
}

.sengoku-mark span:first-child {
  position: absolute;
  top: 17%;
  left: 48%;
  width: 0.35rem;
  height: 66%;
  border-radius: 100%;
  background: linear-gradient(var(--paper), var(--gold));
  transform: rotate(42deg);
  box-shadow: 0 0 1rem rgba(233, 227, 216, 0.15);
}

.sengoku-mark span:nth-child(2) {
  position: absolute;
  top: 57%;
  left: 28%;
  width: 45%;
  height: 0.3rem;
  background: var(--vermilion);
  transform: rotate(42deg);
}

.sengoku-mark span:nth-child(3) {
  position: absolute;
  top: 18%;
  right: 22%;
  width: 0.45rem;
  height: 24%;
  border-radius: 100%;
  background: var(--paper);
  transform: rotate(42deg);
}

.edo-mark span:first-child,
.edo-mark span:nth-child(2),
.edo-mark span:nth-child(3) {
  position: absolute;
  right: 12%;
  left: 12%;
  height: 16%;
  border: 0.25rem solid var(--vermilion);
  border-top: 0;
  border-radius: 0 0 50% 50%;
}

.edo-mark span:first-child { top: 27%; }
.edo-mark span:nth-child(2) { top: 43%; transform: scaleX(0.78); }
.edo-mark span:nth-child(3) { top: 59%; transform: scaleX(0.54); }

.meiji-mark span:first-child {
  position: absolute;
  inset: 28%;
  border-radius: 50%;
  background: var(--vermilion);
  box-shadow: 0 0 3rem rgba(209, 59, 40, 0.32);
}

.meiji-mark span:nth-child(2),
.meiji-mark span:nth-child(3) {
  position: absolute;
  top: 49.5%;
  left: 7%;
  width: 86%;
  height: 1px;
  background: var(--gold);
}

.meiji-mark span:nth-child(3) {
  transform: rotate(90deg);
}

.era-copy {
  padding-left: 4rem;
}

.era-number {
  margin: 0 0 0.6rem;
  color: var(--vermilion);
  font-size: 0.66rem;
  letter-spacing: 0.25em;
}

.era-copy h3 {
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(2.2rem, 5vw, 4.6rem);
  font-weight: 500;
  line-height: 1;
}

.era-copy h3 small {
  display: block;
  margin-top: 0.8rem;
  color: var(--paper-dim);
  font-family: var(--sans);
  font-size: 0.58rem;
  font-weight: 500;
  letter-spacing: 0.48em;
}

.era-copy > p:not(.era-number) {
  max-width: 27rem;
  margin: 1.8rem 0;
  color: var(--paper-dim);
  font-family: var(--serif);
  font-size: 0.9rem;
}

.reverse .era-copy > p:not(.era-number) {
  margin-left: auto;
}

.era-tag {
  color: var(--gold);
  font-size: 0.54rem;
  letter-spacing: 0.24em;
}

.era-chamber {
  position: relative;
  min-height: 100svh;
  padding: clamp(7rem, 12vw, 11rem) 0;
  overflow: hidden;
  background:
    linear-gradient(100deg, rgba(77, 14, 12, 0.34), transparent 34%),
    #101012;
}

.chamber-backdrop {
  position: absolute;
  top: 50%;
  right: -10rem;
  width: min(70vw, 58rem);
  aspect-ratio: 1;
  border-radius: 50%;
  transform: translateY(-50%);
}

.ring {
  position: absolute;
  border: 1px solid rgba(183, 154, 91, 0.12);
  border-radius: 50%;
}

.ring-one { inset: 5%; animation: reverse-spin 38s linear infinite; }
.ring-two { inset: 18%; animation: slow-spin 25s linear infinite; }
.ring-three { inset: 33%; animation: reverse-spin 17s linear infinite; }

.ring::before,
.ring::after {
  position: absolute;
  top: 50%;
  width: 0.45rem;
  aspect-ratio: 1;
  border-radius: 50%;
  content: "";
  background: var(--vermilion);
  box-shadow: 0 0 1rem var(--vermilion);
}

.ring::before { left: -0.22rem; }
.ring::after { right: -0.22rem; }

@keyframes reverse-spin {
  to { transform: rotate(-360deg); }
}

.chamber-layout {
  position: relative;
  z-index: 2;
}

.chamber-intro {
  max-width: 46rem;
}

.era-selector {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  margin: 5rem 0 2.5rem;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.era-selector button {
  position: relative;
  min-height: 6.5rem;
  color: var(--paper-dim);
  border: 0;
  border-right: 1px solid var(--line);
  background: transparent;
  cursor: pointer;
  transition: color 0.35s ease, background 0.35s ease;
}

.era-selector button:last-child {
  border-right: 0;
}

.era-selector button::after {
  position: absolute;
  right: 0;
  bottom: -1px;
  left: 0;
  height: 2px;
  content: "";
  background: var(--vermilion);
  transform: scaleX(0);
  transition: transform 0.4s ease;
}

.era-selector button:hover,
.era-selector button[aria-selected="true"] {
  color: var(--paper);
  background: rgba(255, 255, 255, 0.025);
}

.era-selector button[aria-selected="true"]::after {
  transform: scaleX(1);
}

.era-selector b {
  display: block;
  font-family: var(--serif);
  font-size: 1.4rem;
  font-weight: 500;
}

.era-selector span {
  font-size: 0.48rem;
  letter-spacing: 0.3em;
}

.era-stage {
  position: relative;
  display: grid;
  grid-template-columns: 0.7fr 1.5fr;
  align-items: center;
  min-height: 25rem;
  padding: clamp(2rem, 5vw, 5rem);
  border: 1px solid var(--line);
  background: rgba(8, 8, 10, 0.62);
  box-shadow: 0 2rem 7rem rgba(0, 0, 0, 0.2);
  backdrop-filter: blur(8px);
}

.stage-glyph {
  position: relative;
  display: grid;
  place-items: center;
  width: min(18rem, 80%);
  aspect-ratio: 1;
}

.stage-glyph::before,
.stage-glyph::after,
.glyph-ring {
  position: absolute;
  border-radius: 50%;
  content: "";
}

.stage-glyph::before {
  inset: 12%;
  border: 1px solid rgba(183, 154, 91, 0.35);
}

.stage-glyph::after {
  inset: 23%;
  background: var(--vermilion-dark);
  box-shadow: 0 0 4rem rgba(209, 59, 40, 0.18);
}

.glyph-ring {
  inset: 0;
  border: 1px dashed rgba(233, 227, 216, 0.14);
  animation: slow-spin 18s linear infinite;
}

.stage-glyph strong {
  position: relative;
  z-index: 2;
  font-family: var(--serif);
  font-size: clamp(4rem, 9vw, 7.5rem);
  font-weight: 500;
  line-height: 1;
}

.stage-content {
  max-width: 38rem;
}

.stage-content.changing {
  animation: content-change 0.55s ease both;
}

@keyframes content-change {
  0% { opacity: 0; transform: translateY(1rem); }
  100% { opacity: 1; transform: translateY(0); }
}

.stage-period {
  margin: 0 0 1rem;
  color: var(--gold);
  font-size: 0.58rem;
  letter-spacing: 0.28em;
}

.stage-content h3 {
  margin: 0;
  font-family: Georgia, serif;
  font-size: clamp(1.8rem, 4vw, 3.5rem);
  font-weight: 400;
  line-height: 1.2;
}

.stage-content > p:not(.stage-period) {
  margin: 1.5rem 0 2rem;
  color: var(--paper-dim);
  font-family: Georgia, serif;
  font-size: 0.92rem;
}

.stage-facts {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--line);
}

.stage-facts span {
  color: var(--paper-dim);
  font-family: Georgia, serif;
  font-size: 0.72rem;
}

.stage-facts b {
  display: block;
  margin-bottom: 0.35rem;
  color: var(--vermilion);
  font-family: var(--sans);
  font-size: 0.48rem;
  letter-spacing: 0.18em;
}

.stage-counter {
  position: absolute;
  right: 1.5rem;
  bottom: 1.2rem;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--paper-dim);
  font-size: 0.55rem;
  letter-spacing: 0.2em;
}

.stage-counter i {
  width: 2rem;
  height: 1px;
  background: var(--line);
}

.archive {
  padding-top: clamp(7rem, 12vw, 11rem);
  padding-bottom: clamp(7rem, 12vw, 11rem);
}

.artifact-grid {
  display: grid;
  grid-template-columns: 1.3fr 0.85fr;
  grid-auto-rows: minmax(22rem, auto);
  gap: 1rem;
}

.artifact {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  min-height: 25rem;
  padding: clamp(1.5rem, 4vw, 3rem);
  overflow: hidden;
  border: 1px solid var(--line);
  background: #111113;
  transition: transform 0.5s cubic-bezier(0.2, 0.75, 0.2, 1), border-color 0.5s ease;
}

.artifact:hover {
  z-index: 2;
  border-color: rgba(183, 154, 91, 0.46);
  transform: translateY(-0.5rem);
}

.artifact-wide {
  grid-row: span 2;
}

.artifact-art {
  position: absolute;
  inset: 0;
  opacity: 0.74;
  transition: transform 0.8s cubic-bezier(0.2, 0.75, 0.2, 1);
}

.artifact:hover .artifact-art {
  transform: scale(1.05);
}

.wave-art {
  background:
    radial-gradient(circle at 20% 20%, rgba(183, 154, 91, 0.12), transparent 24%),
    linear-gradient(160deg, #17232a, #0d1013 65%);
}

.wave-art span {
  position: absolute;
  width: 65%;
  aspect-ratio: 1;
  border: clamp(0.45rem, 1vw, 0.9rem) solid rgba(192, 211, 214, 0.65);
  border-left-color: transparent;
  border-bottom-color: transparent;
  border-radius: 50%;
  transform: rotate(-36deg);
}

.wave-art span:first-child { right: -18%; bottom: 10%; }
.wave-art span:nth-child(2) { right: 5%; bottom: 22%; transform: rotate(-36deg) scale(0.72); }
.wave-art span:nth-child(3) { right: 27%; bottom: 27%; transform: rotate(-36deg) scale(0.48); }
.wave-art span:nth-child(4) { right: 40%; bottom: 37%; transform: rotate(-36deg) scale(0.3); }

.moon-art {
  background: linear-gradient(145deg, #16141c, #0e0e10);
}

.moon-art span {
  position: absolute;
  top: 10%;
  right: 9%;
  width: 74%;
  aspect-ratio: 1;
  border-radius: 50%;
  background: #c2aa73;
  box-shadow: 0 0 5rem rgba(183, 154, 91, 0.16);
}

.moon-art span::after {
  position: absolute;
  inset: -6% -6% 16% 18%;
  border-radius: 50%;
  content: "";
  background: #15131a;
}

.blade-art {
  background:
    radial-gradient(circle at 70% 30%, rgba(132, 18, 16, 0.32), transparent 40%),
    #111113;
}

.blade-art span {
  position: absolute;
  top: -20%;
  left: 52%;
  width: 0.65rem;
  height: 140%;
  border-radius: 50% 50% 20% 20%;
  background: linear-gradient(90deg, #777, #f2eadb 52%, #777);
  box-shadow: 0 0 2rem rgba(255, 255, 255, 0.15);
  transform: rotate(43deg);
}

.blade-art span::after {
  position: absolute;
  right: -1.7rem;
  bottom: 18%;
  width: 4rem;
  height: 0.45rem;
  border-radius: 50%;
  content: "";
  background: var(--vermilion);
}

.artifact-code,
.artifact h3,
.artifact > p:last-child {
  position: relative;
  z-index: 2;
}

.artifact-code {
  margin: 0 0 0.6rem;
  color: var(--gold);
  font-size: 0.5rem;
  letter-spacing: 0.25em;
}

.artifact h3 {
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(2rem, 5vw, 4rem);
  font-weight: 500;
  line-height: 1;
}

.artifact h3 small {
  font-family: var(--sans);
  font-size: 0.55rem;
  letter-spacing: 0.32em;
}

.artifact > p:last-child {
  max-width: 30rem;
  margin: 1rem 0 0;
  color: rgba(233, 227, 216, 0.68);
  font-family: Georgia, serif;
  font-size: 0.8rem;
}

.epilogue {
  position: relative;
  display: grid;
  place-items: center;
  min-height: 85svh;
  overflow: hidden;
  text-align: center;
  background:
    linear-gradient(0deg, rgba(11, 11, 13, 0.95), transparent 55%),
    #161316;
}

.epilogue-sun {
  position: absolute;
  bottom: -45%;
  left: 50%;
  width: min(75vw, 65rem);
  aspect-ratio: 1;
  border-radius: 50%;
  background: linear-gradient(150deg, #b83c2d, #6c1815);
  box-shadow: 0 0 10rem rgba(209, 59, 40, 0.24);
  transform: translateX(-50%);
}

.epilogue-copy {
  position: relative;
  z-index: 2;
}

.epilogue h2 span {
  color: var(--paper-dim);
  font-family: Georgia, serif;
  font-size: 0.72em;
  font-style: italic;
}

.epilogue-copy > p:not(.kicker) {
  margin: 1.5rem 0 2.5rem;
  color: var(--paper-dim);
  font-family: Georgia, serif;
}

.epilogue a {
  display: inline-flex;
  align-items: center;
  gap: 1rem;
  padding-bottom: 0.55rem;
  border-bottom: 1px solid var(--gold);
  font-size: 0.58rem;
  letter-spacing: 0.26em;
  text-decoration: none;
}

.epilogue a i {
  color: var(--vermilion);
  font-size: 1rem;
  font-style: normal;
  transition: transform 0.3s ease;
}

.epilogue a:hover i {
  transform: translateY(-0.35rem);
}

footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 11rem;
  padding: 2rem clamp(1.5rem, 5vw, 5rem);
  border-top: 1px solid var(--line);
  color: var(--paper-dim);
  background: #09090b;
}

footer > div {
  display: flex;
  align-items: center;
  gap: 1rem;
}

footer p {
  margin: 0;
  font-size: 0.52rem;
  letter-spacing: 0.18em;
}

footer strong {
  color: var(--paper);
  font-family: var(--serif);
  font-size: 0.82rem;
  letter-spacing: 0.15em;
}

footer small {
  font-family: Georgia, serif;
  letter-spacing: 0.05em;
}

.subpage {
  background:
    radial-gradient(circle at 78% 12%, rgba(116, 25, 20, 0.2), transparent 29rem),
    var(--ink);
}

.page-hero {
  position: relative;
  display: grid;
  place-items: center;
  min-height: 72svh;
  padding: 9rem 1.5rem 5rem;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
  text-align: center;
  isolation: isolate;
}

.page-hero::before {
  position: absolute;
  inset: 0;
  z-index: -2;
  content: "";
  background:
    linear-gradient(180deg, rgba(11, 11, 13, 0.18), var(--ink)),
    repeating-linear-gradient(90deg, transparent 0 11.9%, rgba(233, 227, 216, 0.025) 12%);
}

.page-title {
  position: relative;
  z-index: 2;
  max-width: 68rem;
}

.page-title h1 {
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(3.2rem, 8vw, 6.7rem);
  font-weight: 500;
  line-height: 1.05;
  letter-spacing: 0.04em;
}

.page-title > p:last-child {
  max-width: 43rem;
  margin: 1.8rem auto 0;
  color: var(--paper-dim);
  font-family: Georgia, serif;
  font-size: 0.92rem;
}

.page-kanji {
  position: absolute;
  right: 4vw;
  bottom: -0.26em;
  margin: 0;
  color: rgba(209, 59, 40, 0.12);
  font-family: var(--serif);
  font-size: clamp(15rem, 35vw, 34rem);
  line-height: 1;
  user-select: none;
}

.page-orbit {
  position: absolute;
  top: 50%;
  left: 50%;
  width: min(52vw, 34rem);
  aspect-ratio: 1;
  border: 1px solid rgba(183, 154, 91, 0.13);
  border-radius: 50%;
  transform: translate(-50%, -50%);
  animation: slow-spin 32s linear infinite;
}

.page-orbit::before,
.page-orbit span {
  position: absolute;
  border: 1px solid rgba(183, 154, 91, 0.11);
  border-radius: 50%;
  content: "";
}

.page-orbit::before { inset: 18%; }
.page-orbit span:first-child { inset: -10%; border-style: dashed; }
.page-orbit span:last-child {
  top: 48%;
  left: -0.25rem;
  width: 0.5rem;
  aspect-ratio: 1;
  border: 0;
  background: var(--vermilion);
  box-shadow: 0 0 1rem var(--vermilion);
}

.editorial {
  padding-top: clamp(6rem, 11vw, 10rem);
  padding-bottom: clamp(6rem, 11vw, 10rem);
}

.editorial-lead {
  display: grid;
  grid-template-columns: 0.5fr 1.5fr;
  column-gap: clamp(2rem, 7vw, 8rem);
}

.editorial-lead .section-index {
  grid-row: span 3;
}

.section-index {
  margin: 0 0 1rem;
  color: var(--gold);
  font-size: 0.55rem;
  letter-spacing: 0.28em;
}

.editorial h2,
.chronicle-end h2 {
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(2.2rem, 5vw, 4.5rem);
  font-weight: 500;
  line-height: 1.2;
}

.editorial article > p:not(.section-index),
.chapter-copy > p:not(.section-index) {
  color: var(--paper-dim);
  font-family: Georgia, serif;
}

.editorial .lead-copy {
  margin-top: 2rem;
  color: var(--paper) !important;
  font-family: var(--serif) !important;
  font-size: clamp(1.1rem, 2vw, 1.4rem);
  line-height: 2;
}

.principle-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  margin-top: clamp(5rem, 10vw, 10rem);
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.principle {
  position: relative;
  min-height: 24rem;
  padding: 2.5rem;
  overflow: hidden;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.principle > span {
  position: absolute;
  right: -0.12em;
  bottom: -0.25em;
  color: rgba(209, 59, 40, 0.13);
  font-family: var(--serif);
  font-size: 13rem;
  line-height: 1;
}

.principle h3 {
  margin: 6rem 0 1rem;
  font-family: Georgia, serif;
  font-size: 1.65rem;
  font-weight: 400;
}

.principle > p:last-child {
  position: relative;
  max-width: 15rem;
  color: var(--paper-dim);
  font-family: Georgia, serif;
  font-size: 0.82rem;
}

.quote-field {
  display: grid;
  place-items: center;
  min-height: 70svh;
  padding: 6rem 1.5rem;
  background:
    radial-gradient(circle at 50% 50%, rgba(209, 59, 40, 0.23), transparent 27rem),
    #101012;
}

.quote-field blockquote {
  margin: 0;
  text-align: center;
}

.quote-field blockquote > p {
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(2rem, 5vw, 4.5rem);
  line-height: 1.5;
}

.quote-field blockquote footer {
  display: block;
  min-height: 0;
  margin-top: 2.5rem;
  padding: 0;
  border: 0;
  color: var(--gold);
  background: transparent;
  font-size: 0.52rem;
  letter-spacing: 0.28em;
}

.editorial-closing {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 4rem;
}

.editorial-closing article {
  max-width: 45rem;
}

.text-link {
  display: inline-flex;
  flex: 0 0 auto;
  align-items: center;
  gap: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--gold);
  color: var(--paper);
  font-family: var(--serif);
  font-size: 0.72rem;
  letter-spacing: 0.15em;
  text-decoration: none;
}

.text-link i {
  color: var(--vermilion);
  font-style: normal;
  transition: transform 0.3s ease;
}

.text-link:hover i {
  transform: translateX(0.35rem);
}

.chronicle-hero::before {
  background:
    linear-gradient(180deg, rgba(11, 11, 13, 0.15), var(--ink)),
    repeating-radial-gradient(circle at 50% 110%, transparent 0 4rem, rgba(183, 154, 91, 0.04) 4.05rem 4.1rem);
}

.chapter-list {
  padding-top: clamp(5rem, 10vw, 9rem);
  padding-bottom: clamp(5rem, 10vw, 9rem);
}

.chapter {
  position: relative;
  display: grid;
  grid-template-columns: 0.38fr 1.3fr 0.5fr;
  gap: clamp(2rem, 6vw, 7rem);
  align-items: center;
  min-height: 31rem;
  border-top: 1px solid var(--line);
}

.chapter:last-child {
  border-bottom: 1px solid var(--line);
}

.chapter-meta {
  align-self: start;
  padding-top: 2rem;
}

.chapter-meta span {
  display: block;
  color: var(--vermilion);
  font-family: Georgia, serif;
  font-size: 2.5rem;
}

.chapter-meta time {
  color: var(--paper-dim);
  font-size: 0.55rem;
  letter-spacing: 0.2em;
}

.chapter-copy h2 {
  margin: 0;
  font-family: Georgia, serif;
  font-size: clamp(2rem, 4vw, 3.8rem);
  font-weight: 400;
  line-height: 1.18;
}

.chapter-copy > p:last-child {
  max-width: 38rem;
  margin-top: 1.5rem;
}

.chapter-symbol {
  position: relative;
  justify-self: center;
  width: min(16rem, 100%);
  aspect-ratio: 1;
  border: 1px solid rgba(183, 154, 91, 0.16);
  border-radius: 50%;
}

.chapter-symbol::before {
  position: absolute;
  inset: 14%;
  border: 1px dashed rgba(233, 227, 216, 0.1);
  border-radius: 50%;
  content: "";
  animation: slow-spin 20s linear infinite;
}

.symbol-cord span {
  position: absolute;
  inset: 28%;
  border: 0.6rem double var(--vermilion);
  border-radius: 41% 59%;
  transform: rotate(32deg);
}

.symbol-moon span {
  position: absolute;
  inset: 24%;
  border-radius: 50%;
  background: var(--gold);
}

.symbol-moon span::after {
  position: absolute;
  inset: -8% -8% 15% 22%;
  border-radius: 50%;
  content: "";
  background: var(--ink);
}

.symbol-blade span {
  position: absolute;
  top: 15%;
  left: 49%;
  width: 0.3rem;
  height: 70%;
  border-radius: 100%;
  background: linear-gradient(var(--paper), var(--gold));
  transform: rotate(42deg);
}

.symbol-wave span {
  position: absolute;
  right: 14%;
  bottom: 20%;
  width: 62%;
  aspect-ratio: 1;
  border: 0.6rem solid #9fb5b6;
  border-bottom-color: transparent;
  border-left-color: transparent;
  border-radius: 50%;
  transform: rotate(-38deg);
}

.symbol-sun span {
  position: absolute;
  inset: 27%;
  border-radius: 50%;
  background: var(--vermilion);
  box-shadow: 0 0 2rem rgba(209, 59, 40, 0.32);
}

.chronicle-end {
  display: grid;
  place-items: center;
  min-height: 72svh;
  padding: 5rem 1.5rem;
  text-align: center;
  background:
    radial-gradient(circle at 50% 70%, rgba(130, 28, 22, 0.35), transparent 28rem),
    #101012;
}

.chronicle-end .text-link {
  margin-top: 2.5rem;
}

.error-page {
  min-height: 100svh;
  overflow: hidden;
  background: var(--ink);
}

.error-stage {
  position: relative;
  display: grid;
  place-items: center;
  align-content: center;
  min-height: 100svh;
  padding: 2rem;
  overflow: hidden;
  text-align: center;
}

.error-code {
  color: var(--gold);
  font-size: 0.62rem;
  letter-spacing: 0.35em;
}

.error-stage h1 {
  margin: 1rem 0;
  font-family: var(--serif);
  font-size: clamp(3rem, 9vw, 7rem);
  font-weight: 500;
}

.error-stage > p:not(.error-code) {
  color: var(--paper-dim);
  font-family: Georgia, serif;
}

.error-stage .text-link {
  margin-top: 2rem;
}

.error-rings {
  position: absolute;
  z-index: -1;
  width: min(80vw, 52rem);
  aspect-ratio: 1;
  border: 1px solid rgba(183, 154, 91, 0.1);
  border-radius: 50%;
  animation: slow-spin 35s linear infinite;
}

.error-rings::before,
.error-rings span {
  position: absolute;
  border: 1px solid rgba(183, 154, 91, 0.1);
  border-radius: 50%;
  content: "";
}

.error-rings::before { inset: 15%; }
.error-rings span:first-child { inset: 30%; }
.error-rings span:nth-child(2) { inset: 45%; background: rgba(209, 59, 40, 0.35); }
.error-rings span:nth-child(3) { inset: -10%; border-style: dashed; }

.reveal {
  opacity: 0;
  transform: translateY(2rem);
  transition: opacity 0.85s ease, transform 0.85s cubic-bezier(0.2, 0.75, 0.2, 1);
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 900px) {
  .site-header nav {
    display: none;
  }

  .hero-index,
  .torii {
    display: none;
  }

  .sun-disc {
    width: min(70vw, 28rem);
  }

  .era-card,
  .era-card.reverse {
    grid-template-columns: 0.2fr 0.8fr 1.1fr;
  }

  .era-card.reverse {
    grid-template-columns: 1.1fr 0.8fr 0.2fr;
  }

  .era-card.reverse .era-copy {
    padding-right: 2rem;
  }

  .era-copy {
    padding-left: 2rem;
  }

  .era-stage {
    grid-template-columns: 0.75fr 1.25fr;
  }

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

  .artifact-wide {
    grid-column: span 2;
    grid-row: auto;
  }

  .chapter {
    grid-template-columns: 0.25fr 1.25fr;
  }

  .chapter-symbol {
    display: none;
  }
}

@media (min-width: 681px) {
  .page-title h1 {
    white-space: nowrap;
  }
}

@media (max-width: 680px) {
  .site-header {
    min-height: 4.6rem;
    padding-inline: 1rem;
  }

  .sound-toggle em,
  .brand-copy small {
    display: none;
  }

  .language-switcher {
    gap: 0.05rem;
    padding: 0.16rem;
  }

  .language-switcher button {
    min-width: auto;
    padding: 0.35rem 0.42rem;
    font-size: 0.45rem;
    letter-spacing: 0;
  }

  .header-mark {
    display: none;
  }

  .hero h1 {
    font-size: clamp(4rem, 22vw, 7rem);
  }

  .hero-romaji {
    letter-spacing: 0.5em;
    text-indent: 0.5em;
  }

  .hero-intro {
    margin-top: 1.8rem;
  }

  .section-shell {
    width: min(100% - 2rem, 1180px);
  }

  .section-heading {
    margin-bottom: 4.5rem;
  }

  .timeline-line {
    left: 1rem;
  }

  .era-card,
  .era-card.reverse {
    grid-template-columns: 2rem 1fr;
    min-height: auto;
    margin-bottom: 7rem;
  }

  .era-card .era-year,
  .era-card.reverse .era-year {
    grid-column: 1;
    grid-row: 1;
    align-self: start;
    text-align: left;
    writing-mode: vertical-rl;
  }

  .era-card .era-visual,
  .era-card.reverse .era-visual {
    grid-column: 2;
    grid-row: 1;
    width: min(67vw, 18rem);
    margin-bottom: 2rem;
  }

  .era-card .era-copy,
  .era-card.reverse .era-copy {
    grid-column: 2;
    grid-row: 2;
    padding: 0;
    text-align: left;
  }

  .reverse .era-copy > p:not(.era-number) {
    margin-left: 0;
  }

  .era-selector {
    grid-template-columns: repeat(5, minmax(4.5rem, 1fr));
    margin-top: 3.5rem;
    overflow-x: auto;
    scrollbar-width: none;
    -ms-overflow-style: none;
  }

  .era-selector::-webkit-scrollbar {
    display: none;
  }

  .era-selector button {
    min-height: 5.5rem;
  }

  .era-selector b {
    font-size: 1.1rem;
  }

  .era-stage {
    grid-template-columns: 1fr;
    padding: 2rem 1.4rem 4rem;
  }

  .stage-glyph {
    width: 12rem;
    margin: 0 auto 2rem;
  }

  .stage-facts {
    grid-template-columns: 1fr;
  }

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

  .artifact-wide {
    grid-column: auto;
  }

  footer {
    align-items: flex-start;
    flex-direction: column;
    justify-content: center;
    gap: 2rem;
  }

  .page-hero {
    min-height: 68svh;
  }

  .page-orbit {
    width: 90vw;
  }

  .editorial-lead {
    display: block;
  }

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

  .principle {
    min-height: 19rem;
  }

  .editorial-closing {
    align-items: flex-start;
    flex-direction: column;
  }

  .chapter {
    grid-template-columns: 1fr;
    gap: 1.4rem;
    min-height: 28rem;
    padding: 3rem 0;
  }

  .chapter-meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: 0;
  }
}

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

  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}