:root,
.sw-root {
  --sw-bg: #0a0806;
  --sw-ink: #f3eadb;
  --sw-ink-soft: #c5b79f;
  --sw-accent: #c4a15a;
  --sw-font-display: ui-monospace, "SFMono-Regular", Menlo, Monaco, "PingFang SC", monospace;
  --sw-font-body: ui-monospace, "SFMono-Regular", Menlo, Monaco, "PingFang SC", monospace;
  --museum-brown: #1a1410;
  --aged-brass: #8b6914;
  --label-ivory: #d4c8b8;
  --z-content: 100;
  --z-skip: 200;
}

* {
  box-sizing: border-box;
}

html {
  color-scheme: dark;
  background: #0a0806;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: #0a0806;
  color: #f3eadb;
}

::selection {
  color: #0a0806;
  background: #c4a15a;
}

.skip-link {
  position: fixed;
  z-index: var(--z-skip);
  top: 12px;
  left: 12px;
  padding: 10px 14px;
  color: #0a0806;
  background: #d4c8b8;
  transform: translateY(-160%);
}

.skip-link:focus {
  transform: none;
}

.sw-sky {
  background: #0a0806;
}

.sw-sky__grad {
  background:
    radial-gradient(ellipse at 55% 18%, rgb(196 161 90 / 14%), transparent 42%),
    linear-gradient(180deg, #0a0806 0%, #100c09 52%, #0a0806 100%);
}

.sw-sky__glow {
  opacity: 0.24;
  filter: sepia(1);
}

.sw-topbar {
  color: #f3eadb;
  background: linear-gradient(180deg, rgb(10 8 6 / 90%) 0%, transparent 100%);
}

.sw-brand,
.sw-brand__name {
  color: #f3eadb;
}

.sw-brand__mark {
  width: 30px;
  height: 30px;
  flex: 0 0 30px;
  border: 0;
  border-radius: 50%;
  background: url("assets/ui/chapter-01-mark.svg") center / contain no-repeat;
  box-shadow: none;
}

.sw-nav {
  border: 1px solid rgb(196 161 90 / 34%);
  border-radius: 2px;
  background: rgb(10 8 6 / 78%);
  backdrop-filter: blur(8px);
}

.sw-nav__item {
  color: #c5b79f;
  border-radius: 1px;
}

.sw-nav__item:hover,
.sw-nav__item.is-active {
  color: #0a0806;
  background: #c4a15a;
}

.sw-topcta {
  color: #0a0806;
  border-radius: 1px;
  background: #c4a15a;
}

.sw-topbar__actions {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-left: auto;
}

.sw-audio-toggle {
  position: relative;
  width: 42px;
  height: 42px;
  flex: 0 0 42px;
  display: grid;
  place-items: center;
  padding: 0;
  color: #c4a15a;
  border: 1px solid rgb(196 161 90 / 58%);
  border-radius: 50%;
  background: rgb(10 8 6 / 78%);
  backdrop-filter: blur(8px);
  cursor: pointer;
  transition: border-color 180ms ease, background 180ms ease, box-shadow 180ms ease;
}

.sw-audio-toggle:hover,
.sw-audio-toggle:focus-visible {
  border-color: #d4b46f;
  background: rgb(26 20 16 / 94%);
  box-shadow: 0 0 0 3px rgb(196 161 90 / 14%);
  outline: none;
}

.sw-audio-toggle:disabled {
  cursor: not-allowed;
  opacity: 0.45;
}

.sw-audio-toggle::after {
  content: attr(data-tooltip);
  position: absolute;
  top: calc(100% + 9px);
  right: 0;
  width: max-content;
  max-width: 12rem;
  padding: 6px 9px;
  color: #d4c8b8;
  border: 1px solid rgb(196 161 90 / 34%);
  background: rgb(10 8 6 / 94%);
  font: 500 0.72rem/1.2 var(--sw-font-body);
  opacity: 0;
  pointer-events: none;
  transform: translateY(-3px);
  transition: opacity 160ms ease, transform 160ms ease;
}

.sw-audio-toggle:hover::after,
.sw-audio-toggle:focus-visible::after {
  opacity: 1;
  transform: none;
}

.sw-audio-toggle__icon {
  position: absolute;
  width: 20px;
  height: 20px;
}

.sw-audio-toggle__icon--playing {
  display: none;
}

.sw-audio-toggle.is-playing .sw-audio-toggle__icon--playing {
  display: block;
}

.sw-audio-toggle.is-playing .sw-audio-toggle__icon--paused {
  display: none;
}

.sw-audio-toggle__ring {
  position: absolute;
  inset: 4px;
  border: 1px solid transparent;
  border-top-color: rgb(212 180 111 / 78%);
  border-radius: 50%;
  opacity: 0;
}

.sw-audio-toggle.is-playing .sw-audio-toggle__ring {
  opacity: 1;
  animation: sw-audio-turn 4.8s linear infinite;
}

.sw-audio-toggle.is-pending .sw-audio-toggle__ring {
  opacity: 0.55;
  animation: sw-audio-breathe 1.8s ease-in-out infinite;
}

.sw-background-audio {
  display: none;
}

@keyframes sw-audio-turn {
  to { transform: rotate(1turn); }
}

@keyframes sw-audio-breathe {
  50% { transform: scale(0.86); opacity: 0.18; }
}

.sw-copylayer::before {
  width: min(64vw, 900px);
  background: linear-gradient(90deg, #0a0806 0%, rgb(10 8 6 / 92%) 37%, rgb(10 8 6 / 54%) 66%, transparent 100%);
}

.sw-copy {
  width: min(47vw, 600px);
}

@media (min-width: 861px) {
  .sw-copy:last-child {
    top: 46%;
  }
}

.sw-copy__num {
  color: #c5b79f;
}

.sw-copy__eyebrow {
  color: #c4a15a;
  text-transform: none;
  letter-spacing: 0.08em;
}

.sw-copy__title {
  max-width: 16ch;
  margin-top: 16px;
  color: #f3eadb;
  font-size: clamp(2.25rem, 4.5vw, 4.8rem);
  font-weight: 650;
  letter-spacing: -0.03em;
  line-height: 1.08;
  text-shadow: 0 2px 8px #0a0806;
  text-wrap: balance;
}

.sw-copy__body {
  max-width: 36ch;
  color: #d4c8b8;
  line-height: 1.75;
  text-shadow: 0 1px 6px #0a0806;
  text-wrap: pretty;
}

.sw-copy__tags li {
  color: #d4c8b8;
  border: 1px solid rgb(196 161 90 / 48%);
  border-radius: 1px;
  background: rgb(26 20 16 / 74%);
}

.sw-btn {
  border-radius: 1px;
}

.sw-btn--primary {
  color: #0a0806;
  background: #c4a15a;
}

.sw-btn--ghost {
  color: #f3eadb;
  border-color: rgb(212 200 184 / 46%);
}

.sw-route::before {
  background: #8b6914;
}

.sw-route__label {
  color: #f3eadb;
  border: 1px solid rgb(196 161 90 / 38%);
  border-radius: 1px;
  background: rgb(10 8 6 / 88%);
}

.sw-hint {
  color: #d4c8b8;
}

.sw-hint i {
  border-color: rgb(196 161 90 / 62%);
}

.heritage-wall {
  position: relative;
  z-index: var(--z-content);
  min-height: 100vh;
  padding: clamp(88px, 11vw, 168px) clamp(20px, 5vw, 80px) 64px;
  overflow: hidden;
  background:
    radial-gradient(circle at 78% 4%, rgb(196 161 90 / 12%), transparent 27%),
    #0a0806;
  font-family: var(--sw-font-body);
}

.heritage-wall::before {
  content: "";
  position: absolute;
  inset: 0 0 auto;
  height: 1px;
  background: #8b6914;
}

.wall-header {
  display: grid;
  grid-template-columns: minmax(190px, 0.32fr) minmax(0, 1fr);
  align-items: start;
  column-gap: clamp(36px, 6vw, 96px);
  row-gap: 24px;
  max-width: 1400px;
  margin: 0 auto clamp(56px, 8vw, 120px);
}

.wall-index {
  grid-row: 1 / span 2;
  margin: 10px 0 0;
  color: #c4a15a;
  font-family: "Songti SC", STSong, SimSun, serif;
  font-size: 1.68rem;
  font-weight: 700;
  letter-spacing: 0.12em;
}

.wall-header h1 {
  display: flex;
  flex-direction: column;
  max-width: none;
  margin: 0;
  color: #f3eadb;
  font-family: "Kaiti SC", STKaiti, "Songti SC", STSong, serif;
  font-size: clamp(2.7rem, 5vw, 5.4rem);
  font-weight: 600;
  letter-spacing: 0.04em;
  line-height: 1.18;
}

.wall-header h1 span:last-child {
  margin-left: 1.1em;
}

.wall-intro {
  max-width: 64ch;
  margin: 24px 0 0;
  color: #d4c8b8;
  font-size: clamp(1rem, 1.25vw, 1.16rem);
  line-height: 1.9;
  text-wrap: pretty;
}

.archive-list {
  max-width: 1400px;
  margin: 0 auto;
}

.archive-entry {
  display: grid;
  grid-template-columns: minmax(240px, 0.62fr) minmax(0, 1.38fr);
  align-items: center;
  gap: clamp(40px, 7vw, 112px);
  padding: clamp(48px, 7vw, 104px) 0;
  border-top: 1px solid #8b6914;
}

.archive-entry:nth-child(even) {
  grid-template-columns: minmax(0, 1.38fr) minmax(240px, 0.62fr);
}

.archive-entry:nth-child(even) .archive-media {
  order: 2;
}

.archive-media {
  width: min(100%, 440px);
  margin: 0;
  justify-self: start;
}

.archive-entry:nth-child(even) .archive-media {
  justify-self: end;
}

.archive-media--wide {
  width: min(100%, 500px);
}

.archive-media img {
  display: block;
  width: 100%;
  max-height: 780px;
  height: auto;
  object-fit: contain;
  background: #1a1410;
}

.archive-media figcaption {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  margin-top: 14px;
  color: #aa9a84;
  font-size: 0.8rem;
  line-height: 1.6;
}

.archive-type {
  margin: 0 0 18px;
  color: #c4a15a;
  font-size: 0.82rem;
  letter-spacing: 0.12em;
}

.archive-copy h2 {
  margin: 0;
  color: #f3eadb;
  font-family: "Songti SC", STSong, SimSun, serif;
  font-size: clamp(2rem, 3.4vw, 3.9rem);
  font-weight: 700;
  letter-spacing: 0.015em;
  line-height: 1.18;
  text-wrap: balance;
}

.archive-description {
  max-width: 42em;
  margin: 28px 0 0;
  color: #d4c8b8;
  font-size: clamp(1rem, 1.25vw, 1.18rem);
  line-height: 1.95;
  text-align: justify;
  text-justify: inter-ideograph;
}

.archive-meta {
  margin: 32px 0 0;
  border-top: 1px solid rgb(139 105 20 / 65%);
}

.archive-meta div {
  display: grid;
  grid-template-columns: 4.5rem minmax(0, 1fr);
  gap: 18px;
  padding: 11px 0;
  border-bottom: 1px solid rgb(139 105 20 / 32%);
}

.archive-meta dt,
.archive-meta dd {
  margin: 0;
  font-size: 0.86rem;
  line-height: 1.65;
}

.archive-meta dt {
  color: #aa9a84;
}

.archive-meta dd {
  color: #d4c8b8;
}

.archive-meta a {
  color: #c4a15a;
  text-underline-offset: 4px;
}

.wall-footer {
  display: flex;
  justify-content: space-between;
  gap: 28px;
  max-width: 1500px;
  margin: clamp(72px, 11vw, 160px) auto 0;
  padding-top: 22px;
  border-top: 1px solid #8b6914;
  color: #c5b79f;
  font-size: 0.82rem;
  line-height: 1.7;
}

.wall-footer p {
  max-width: 70ch;
  margin: 0;
}

.wall-footer a {
  flex: 0 0 auto;
  color: #c4a15a;
  text-underline-offset: 5px;
}

.noscript {
  position: fixed;
  z-index: var(--z-content);
  inset: auto 16px 16px;
  margin: 0;
  padding: 12px;
  color: #0a0806;
  background: #d4c8b8;
}

@media (max-width: 860px) {
  .sw-topbar {
    padding-right: 54px;
  }

  .sw-brand {
    position: absolute;
    top: 14px;
    left: max(6px, env(safe-area-inset-left));
  }

  .sw-topcta {
    display: none;
  }

  .sw-topbar__actions {
    position: absolute;
    top: 14px;
    right: max(6px, env(safe-area-inset-right));
    gap: 0;
    margin-left: 0;
  }

  .sw-audio-toggle {
    width: 38px;
    height: 38px;
    flex-basis: 38px;
  }

  .sw-audio-toggle::after {
    display: none;
  }

  .sw-copylayer::before {
    width: 100%;
    height: 66%;
    background: linear-gradient(0deg, #0a0806 6%, rgb(10 8 6 / 90%) 45%, transparent 100%);
  }

  .sw-copy {
    right: 48px;
    bottom: calc(clamp(52px, 10dvh, 94px) + env(safe-area-inset-bottom));
  }

  .sw-copy__eyebrow {
    margin-top: 10px;
  }

  .sw-copy__title {
    max-width: 14ch;
    font-size: 2.25rem;
  }

  .sw-copy__body {
    max-width: 34ch;
    margin-top: 12px;
    font-size: clamp(0.88rem, 3.3vw, 1.04rem);
    line-height: 1.62;
  }

  .sw-copy__tags {
    margin-top: 14px;
  }

  .sw-copy__tags li {
    padding: 5px 9px;
    font-size: 0.72rem;
  }

  .sw-copy__cta {
    margin-top: 16px;
  }

  .sw-btn {
    padding: 11px 15px;
    font-size: 0.82rem;
  }

  .wall-header {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .wall-index {
    grid-row: auto;
    font-size: 1.68rem;
  }

  .wall-header h1 {
    max-width: none;
    font-size: clamp(2.6rem, 9vw, 3.5rem);
  }

  .archive-entry,
  .archive-entry:nth-child(even) {
    grid-template-columns: minmax(150px, 0.72fr) minmax(0, 1.28fr);
    gap: clamp(24px, 5vw, 40px);
    padding: 52px 0;
  }

  .archive-entry:nth-child(even) .archive-media {
    order: 2;
  }

  .archive-media,
  .archive-media--wide {
    width: min(100%, 220px);
  }

  .archive-entry:nth-child(odd) .archive-media {
    justify-self: start;
  }

  .archive-entry:nth-child(even) .archive-media {
    justify-self: end;
  }

  .archive-media img {
    max-height: none;
  }

  .archive-description {
    margin-top: 20px;
    font-size: 1rem;
    line-height: 1.85;
    text-align: left;
  }

  .archive-meta {
    margin-top: 24px;
  }

  .archive-meta div {
    grid-template-columns: 3.75rem minmax(0, 1fr);
    gap: 12px;
  }

  .wall-footer {
    flex-direction: column;
  }
}

@media (prefers-reduced-motion: reduce) {
  .sw-audio-toggle__ring {
    animation: none !important;
  }
}

@media (max-width: 560px) {
  /* Keep the exhibit visible on narrow screens: reduce wrapping and compact
     the full copy stack without changing the desktop presentation. */
  .sw-copy {
    width: min(60vw, 250px);
    right: 44px;
    bottom: calc(clamp(34px, 7dvh, 58px) + env(safe-area-inset-bottom));
  }

  .sw-copy__num,
  .sw-copy__eyebrow {
    font-size: 0.72rem;
  }

  .sw-copy__eyebrow {
    margin-top: 6px;
  }

  .sw-copy__title {
    max-width: 15ch;
    margin-top: 9px;
    font-size: clamp(1.72rem, 7.4vw, 1.95rem);
    line-height: 1.1;
  }

  .sw-copy__body {
    max-width: 30ch;
    margin-top: 8px;
    font-size: 0.78rem;
    line-height: 1.5;
  }

  .sw-copy__tags {
    gap: 6px;
    margin-top: 8px;
  }

  .sw-copy__tags li {
    padding: 3px 7px;
    font-size: 0.64rem;
  }

  .sw-copy__cta {
    gap: 7px;
    margin-top: 9px;
  }

  .sw-btn {
    padding: 7px 9px;
    font-size: 0.68rem;
  }

  .wall-header h1 {
    font-size: clamp(2.25rem, 10vw, 3rem);
  }

  .archive-entry,
  .archive-entry:nth-child(even) {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .archive-entry:nth-child(even) .archive-media {
    order: 0;
  }

  .archive-media,
  .archive-media--wide {
    width: min(72%, 320px);
  }

  .archive-entry:nth-child(odd) .archive-media {
    justify-self: start;
  }

  .archive-entry:nth-child(even) .archive-media {
    justify-self: end;
  }
}

@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;
  }
}