:root {
  color-scheme: light;
  --paper: #eee8dc;
  --paper-deep: #e1dacd;
  --ink: #141715;
  --muted: #74746b;
  --line: rgba(25, 29, 26, .18);
  --gold: #c69c65;
  --teal: #85b5a4;
  --coral: #d98d6d;
  --room-accent: var(--gold);
  --serif: Georgia, 'Times New Roman', 'Noto Serif TC', serif;
  --sans: -apple-system, BlinkMacSystemFont, 'PingFang TC', 'Noto Sans TC', sans-serif;
  --mono: 'SFMono-Regular', Consolas, 'Liberation Mono', monospace;
  font-family: var(--sans);
  background: var(--paper);
  color: var(--ink);
  font-synthesis: none;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { min-width: 320px; background: var(--paper); }
body { margin: 0; min-width: 320px; min-height: 100svh; background: var(--paper); }
button, input { font: inherit; }
button { color: inherit; }
button:focus-visible, a:focus-visible, input:focus-visible { outline: 2px solid #80623c; outline-offset: 3px; }
button:disabled { cursor: not-allowed; opacity: .46; }
.museum-shell { min-height: 100svh; display: flex; flex-direction: column; padding: 0 30px; overflow: hidden; }
.masthead { height: 78px; flex: 0 0 78px; display: grid; grid-template-columns: 1fr 1fr 1fr; align-items: center; border-bottom: 1px solid var(--line); }
.wordmark { display: inline-flex; width: fit-content; align-items: center; gap: 10px; color: var(--ink); text-decoration: none; }
.wordmark__mark { width: 31px; height: 31px; border: 1px solid var(--ink); border-radius: 50%; display: grid; place-items: center; font: italic 22px/1 var(--serif); }
.wordmark__text { font: 9px/1.1 var(--mono); letter-spacing: .12em; }
.wordmark__text i { display: inline-block; margin-top: 4px; font: italic 13px/1 var(--serif); letter-spacing: .01em; }
.masthead__center { display: flex; flex-direction: column; align-items: center; gap: 5px; font-size: 11px; letter-spacing: .12em; }
.eyebrow, .edition, .mono, .rail-caption, .rail-foot__label, .stage-topline, .stage-title__kicker, .stage-hint, .stage-coordinates, .range-ends, .instrument-panel__bottom, .dialog-foot { font: 9px/1.4 var(--mono); letter-spacing: .11em; }
.eyebrow { color: var(--muted); }
.masthead__right { justify-self: end; display: flex; align-items: center; gap: 20px; }
.experimental-link { display: inline-flex; align-items: center; min-height: 44px; color: var(--muted); font: 8px/1.4 var(--mono); letter-spacing: .08em; text-decoration: none; white-space: nowrap; }
.experimental-link:hover { color: var(--ink); text-decoration: underline; text-underline-offset: 3px; }
.edition { color: var(--muted); }
.icon-button { width: 34px; height: 34px; display: inline-grid; place-items: center; border: 1px solid var(--line); background: transparent; border-radius: 50%; cursor: pointer; font: 16px/1 var(--serif); transition: background .2s, color .2s, border-color .2s; }
.icon-button:hover { background: var(--ink); color: var(--paper); border-color: var(--ink); }

.exhibition { min-height: 0; flex: 1 1 auto; display: grid; grid-template-columns: 68px minmax(0, 1fr) 294px; grid-template-rows: minmax(0, 1fr) 59px; column-gap: 16px; }
.room-rail { grid-column: 1; grid-row: 1; display: flex; flex-direction: column; justify-content: center; align-items: center; min-height: 0; border-right: 1px solid var(--line); }
.rail-caption { writing-mode: vertical-rl; margin-bottom: 21px; color: var(--muted); transform: rotate(180deg); }
.rail-caption span { color: var(--ink); }
.room-rail__items { display: flex; flex-direction: column; gap: 7px; }
.room-nav-button { width: 34px; height: 34px; border-radius: 50%; border: 1px solid transparent; background: none; color: var(--muted); cursor: pointer; font: 10px/1 var(--mono); transition: color .25s, border .25s, transform .25s, background .25s; }
.room-nav-button:hover { color: var(--ink); transform: scale(1.08); }
.room-nav-button.is-active { border-color: var(--room-accent); background: color-mix(in srgb, var(--room-accent) 18%, transparent); color: var(--ink); }
.room-nav-button.is-discovered::after { content: '·'; color: var(--room-accent); padding-left: 2px; }
.rail-foot { margin-top: 22px; display: flex; flex-direction: column; align-items: center; gap: 5px; color: var(--muted); }
.rail-foot > span:first-child { font: 10px var(--mono); color: var(--ink); writing-mode: vertical-rl; transform: rotate(180deg); }
.rail-foot__line { width: 1px; height: 32px; background: var(--line); }
.rail-foot__label { writing-mode: vertical-rl; transform: rotate(180deg); font-size: 7px; }

.stage { --stage-ink: #ede5d6; --stage-muted: rgba(237,229,214,.68); --stage-bg: #202723; --room-poster: url('./assets/museum-hero.png'); grid-column: 2; grid-row: 1; min-width: 0; min-height: 0; position: relative; overflow: hidden; isolation: isolate; color: var(--stage-ink); background: var(--stage-bg); }
.stage::before { content: ''; position: absolute; inset: 0; z-index: -2; background: linear-gradient(90deg, rgba(18,22,20,.76) 0%, rgba(18,22,20,.35) 44%, rgba(18,22,20,.09) 100%), var(--room-poster) center 54% / cover no-repeat; opacity: 1; transition: opacity 1.4s cubic-bezier(.2,.7,.2,1); }
.stage::after { content: ''; position: absolute; inset: 0; z-index: -1; background: linear-gradient(0deg, rgba(14,17,16,.27), transparent 35%); pointer-events: none; }
.stage.is-entered::before { opacity: .06; }
.stage.is-entered::after { background: linear-gradient(90deg, rgba(14,17,16,.5), rgba(14,17,16,.08) 65%, transparent); }
#artCanvas { position: absolute; inset: 0; width: 100%; height: 100%; display: block; z-index: -1; opacity: .7; mix-blend-mode: screen; transition: opacity 1.2s ease; }
.stage.is-entered #artCanvas { opacity: 1; mix-blend-mode: normal; }
.stage-grain { position: absolute; inset: 0; pointer-events: none; opacity: .12; 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='.88' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.22'/%3E%3C/svg%3E"); z-index: 0; mix-blend-mode: soft-light; }
.stage-topline { position: absolute; z-index: 2; inset: 20px 23px auto; display: flex; justify-content: space-between; color: var(--stage-muted); }
.live-mark { display: inline-flex; align-items: center; gap: 8px; }
.live-mark i { width: 6px; height: 6px; border-radius: 50%; background: var(--room-accent); display: inline-block; box-shadow: 0 0 12px var(--room-accent); animation: breathe 2.6s ease-in-out infinite; }
.stage-title { position: absolute; z-index: 1; left: clamp(24px, 5vw, 72px); top: 50%; width: min(47%, 520px); transform: translateY(-48%); transition: opacity .8s, transform .8s; }
.stage-title__kicker { margin: 0 0 22px; color: var(--stage-muted); font-size: 8px; }
.stage-title h1 { margin: 0; font: 400 clamp(51px, 6.3vw, 98px)/.79 var(--serif); letter-spacing: -.055em; }
.stage-title h1 em { font-weight: 400; }
.stage-title__zh { margin: 20px 0 0; font-size: 14px; letter-spacing: .25em; }
.stage-title__poem { margin: 21px 0 27px; color: var(--stage-muted); font: 15px/1.8 var(--serif); letter-spacing: .06em; }
.enter-button { display: inline-flex; justify-content: space-between; align-items: center; gap: 43px; min-width: 152px; height: 42px; padding: 0 13px; border: 1px solid rgba(238,232,220,.62); background: transparent; color: var(--stage-ink); cursor: pointer; font-size: 12px; letter-spacing: .08em; transition: background .3s, color .3s, border-color .3s; }
.enter-button:hover { background: var(--paper); border-color: var(--paper); color: var(--ink); }
.stage.is-entered .enter-button { opacity: .52; }
.stage.is-entered .enter-button:hover { opacity: 1; }
.stage.is-entered .stage-title { top: 72px; left: clamp(25px, 3.6vw, 54px); width: min(34%, 300px); transform: none; }
.stage.is-entered .stage-title__kicker { margin-bottom: 9px; font-size: 7px; }
.stage.is-entered .stage-title h1 { font-size: clamp(25px, 2.4vw, 35px); line-height: .91; letter-spacing: -.045em; }
.stage.is-entered .stage-title__zh { margin-top: 9px; font-size: 12px; letter-spacing: .18em; }
.stage.is-entered .stage-title__poem { margin: 8px 0 0; font-size: 12px; line-height: 1.6; }
.stage.is-entered .enter-button { display: none; }
.stage-hint { position: absolute; z-index: 2; right: 25px; bottom: 22px; display: flex; align-items: center; gap: 9px; color: var(--stage-muted); cursor: pointer; border: 0; background: none; font-size: 8px; }
.stage-hint__ring { width: 11px; height: 11px; border: 1px solid var(--room-accent); border-radius: 50%; position: relative; }
.stage-hint__ring::after { content: ''; position: absolute; inset: 3px; border-radius: 50%; background: var(--room-accent); }
.stage-coordinates { position: absolute; z-index: 2; left: 23px; bottom: 22px; display: flex; gap: 17px; color: var(--stage-muted); font-size: 8px; }
.stage:focus-visible { outline: 1px solid var(--room-accent); outline-offset: -1px; }
.exhibition-exit { display: none; position: absolute; z-index: 8; top: 18px; right: 18px; }
.is-exhibition-mode .exhibition-exit { display: inline-grid; }

.instrument-panel { grid-column: 3; grid-row: 1; min-width: 0; display: flex; flex-direction: column; padding: 5px 0 0 6px; }
.instrument-panel__top { display: flex; align-items: center; justify-content: space-between; padding: 2px 2px 19px 0; border-bottom: 1px solid var(--line); }
.fullscreen-button { width: 29px; height: 29px; font-size: 19px; }
.instrument-panel__group { padding: 17px 0 16px; border-bottom: 1px solid var(--line); }
.group-heading { display: flex; align-items: baseline; justify-content: space-between; margin-bottom: 12px; font-size: 14px; letter-spacing: .08em; }
.group-heading .mono { color: var(--muted); font-size: 8px; }
.sound-switch { width: 100%; display: grid; grid-template-columns: 28px 1fr auto; gap: 9px; align-items: center; text-align: left; padding: 0; border: 0; background: transparent; cursor: pointer; }
.sound-switch__glyph { width: 26px; height: 26px; border: 1px solid var(--line); border-radius: 50%; display: grid; place-items: center; font: 15px/1 var(--serif); color: var(--muted); transition: .3s; }
.sound-switch__copy { display: flex; flex-direction: column; gap: 3px; }
.sound-switch__copy strong { font-size: 14px; font-weight: 500; }
.sound-switch__copy small { color: var(--muted); font-size: 10px; }
.switch-track { width: 29px; height: 16px; border: 1px solid var(--line); border-radius: 10px; position: relative; transition: .3s; }
.switch-track i { position: absolute; width: 10px; height: 10px; left: 2px; top: 2px; border-radius: 50%; background: var(--muted); transition: .3s; }
.sound-switch[aria-pressed="true"] .switch-track { border-color: var(--room-accent); background: color-mix(in srgb, var(--room-accent) 35%, transparent); }
.sound-switch[aria-pressed="true"] .switch-track i { left: 14px; background: var(--ink); }
.sound-switch[aria-pressed="true"] .sound-switch__glyph { color: var(--ink); border-color: var(--room-accent); background: color-mix(in srgb, var(--room-accent) 25%, transparent); }
.sound-note { margin: 12px 0 8px 36px; color: var(--muted); font: 12px/1.6 var(--serif); }
.level-meter { height: 2px; margin-left: 36px; background: rgba(20,23,21,.12); overflow: hidden; }
.level-meter span { display: block; width: 0; height: 100%; background: var(--room-accent); transition: width .1s linear; }
.sound-export-mobile { display: none; width: 100%; align-items: center; justify-content: space-between; min-height: 44px; margin-top: 10px; padding: 0 0 0 36px; border: 0; border-bottom: 1px solid var(--line); background: transparent; color: var(--ink); cursor: pointer; text-align: left; font-size: 13px; }
.sound-export-mobile span:first-child { color: var(--room-accent); font-family: var(--serif); font-size: 15px; }
.sound-export-mobile span:last-child { color: var(--muted); }
.range-control { appearance: none; width: 100%; height: 15px; background: transparent; cursor: pointer; display: block; }
.range-control::-webkit-slider-runnable-track { height: 1px; background: linear-gradient(to right, var(--room-accent) var(--range-progress, 48%), rgba(20,23,21,.24) var(--range-progress, 48%)); }
.range-control::-moz-range-track { height: 1px; background: rgba(20,23,21,.24); }
.range-control::-moz-range-progress { height: 1px; background: var(--room-accent); }
.range-control::-webkit-slider-thumb { appearance: none; width: 9px; height: 9px; margin-top: -4px; border-radius: 50%; background: var(--paper); border: 1px solid var(--ink); box-shadow: 0 0 0 3px var(--paper); }
.range-control::-moz-range-thumb { width: 8px; height: 8px; border-radius: 50%; background: var(--paper); border: 1px solid var(--ink); box-shadow: 0 0 0 3px var(--paper); }
.range-control--teal { --room-accent: var(--teal); }
.range-ends { display: flex; justify-content: space-between; margin-top: 1px; color: var(--muted); font-size: 7px; }
.instrument-panel__group--variation { padding-bottom: 18px; }
.seed-row { display: flex; align-items: center; gap: 11px; }
.seed-orbit { width: 31px; height: 31px; border: 1px solid color-mix(in srgb, var(--room-accent) 72%, transparent); color: var(--room-accent); border-radius: 50%; display: grid; place-items: center; font: 18px var(--serif); }
.seed-copy { flex: 1; display: flex; flex-direction: column; gap: 3px; font-size: 12px; }
.seed-copy strong { font-weight: 500; }
.seed-copy b { font: 10px var(--mono); color: var(--room-accent); }
.seed-copy small { color: var(--muted); font-size: 9px; }
.round-button { flex: 0 0 28px; width: 28px; height: 28px; display: grid; place-items: center; border: 1px solid var(--line); border-radius: 50%; background: transparent; cursor: pointer; font-size: 17px; transition: transform .4s, background .2s; }
.round-button:hover { transform: rotate(90deg); background: var(--paper-deep); }
.instrument-panel__actions { display: flex; flex-direction: column; padding-top: 5px; }
.text-action { min-height: 42px; display: grid; grid-template-columns: 22px 1fr auto; align-items: center; gap: 4px; border: 0; border-bottom: 1px solid var(--line); padding: 0; background: transparent; cursor: pointer; text-align: left; font-size: 14px; }
.text-action > span:first-child { color: var(--muted); font-family: var(--serif); font-size: 14px; }
.text-action:hover { color: #785a35; }
kbd { padding: 2px 4px; border: 1px solid var(--line); border-radius: 2px; color: var(--muted); background: rgba(255,255,255,.12); font: 8px var(--mono); }
.action-arrow { font-size: 13px !important; }
.instrument-panel__bottom { margin-top: auto; padding: 12px 0 8px; display: flex; justify-content: space-between; color: var(--muted); font-size: 7px; }

.exhibition-footer { grid-column: 1 / -1; grid-row: 2; display: flex; align-items: center; justify-content: space-between; border-top: 1px solid var(--line); }
.step-button, .footer-tool { border: 0; background: transparent; cursor: pointer; padding: 8px 0; font-size: 13px; letter-spacing: .06em; }
.step-button { display: inline-flex; align-items: center; gap: 9px; color: var(--muted); }
.step-button:hover { color: var(--ink); }
.footer-center { display: flex; align-items: center; gap: 13px; color: var(--muted); font: 9px var(--mono); letter-spacing: .11em; }
.footer-center__quote { color: var(--ink); font: italic 13px var(--serif); letter-spacing: .03em; }
.footer-center__divider { width: 26px; height: 1px; background: var(--line); }
.footer-actions { display: flex; align-items: center; gap: 20px; }
.footer-tool { color: var(--muted); font-size: 13px; }
.footer-tool:hover { color: var(--ink); }
.footer-tool span { margin-right: 5px; color: var(--room-accent); }

.toast { position: fixed; z-index: 100; bottom: 24px; left: 50%; max-width: min(90vw, 480px); transform: translate(-50%, 18px); padding: 11px 17px; background: var(--ink); color: var(--paper); font-size: 12px; line-height: 1.5; opacity: 0; pointer-events: none; transition: opacity .25s, transform .25s; }
.toast.is-visible { opacity: 1; transform: translate(-50%, 0); }

.museum-dialog { width: min(760px, calc(100vw - 32px)); max-height: min(86svh, 780px); padding: 31px 34px 19px; color: var(--ink); background: var(--paper); border: 1px solid rgba(20,23,21,.32); box-shadow: 0 20px 90px rgba(0,0,0,.24); }
.museum-dialog::backdrop { background: rgba(16,19,17,.62); backdrop-filter: blur(4px); }
.dialog-head { display: flex; align-items: flex-start; justify-content: space-between; padding-bottom: 20px; border-bottom: 1px solid var(--line); }
.dialog-head .eyebrow { margin: 0 0 9px; }
.dialog-head h2 { margin: 0; font: 400 clamp(25px, 4vw, 38px)/1.05 var(--serif); letter-spacing: -.04em; }
.dialog-head h2 em { color: #817966; font-size: .76em; }
.dialog-close { font-size: 23px; flex: 0 0 auto; }
.dialog-intro { margin: 21px 0 23px; color: #605f57; font: 14px/1.7 var(--serif); }
.dialog-foot { margin-top: 20px; padding-top: 14px; border-top: 1px solid var(--line); display: flex; justify-content: space-between; color: var(--muted); font-size: 8px; }
.atlas-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1px; border: 1px solid var(--line); background: var(--line); }
.atlas-card { min-height: 0; display: flex; flex-direction: column; justify-content: flex-start; text-align: left; padding: 11px; border: 0; background: var(--paper); cursor: pointer; position: relative; overflow: hidden; transition: background .25s; }
.atlas-card::before { content: ''; position: absolute; inset: auto 0 0; height: 3px; background: var(--card-accent); transform: scaleX(0); transform-origin: left; transition: transform .3s; }
.atlas-card:hover { background: #e5ded1; }
.atlas-card:hover::before { transform: scaleX(1); }
.atlas-card.is-current { background: #e6ddcd; }
.atlas-card__image { display: block; width: 100%; height: clamp(76px, 11vw, 116px); object-fit: cover; margin-bottom: 10px; filter: saturate(.77); }
.atlas-card__number { display: flex; justify-content: space-between; color: var(--muted); font: 8px var(--mono); letter-spacing: .08em; }
.atlas-card__stamp { color: var(--card-accent); }
.atlas-card strong { display: block; margin-top: 8px; font: 21px var(--serif); font-weight: 400; }
.atlas-card small { margin-top: 4px; color: var(--muted); font-size: 9px; letter-spacing: .12em; }
.atlas-card__poem { max-width: 96%; margin-top: 10px; color: #65635c; font: 10px/1.5 var(--serif); }
.atlas-card__action { margin-top: 8px; color: #716650; font: 8px/1.4 var(--mono); letter-spacing: .06em; }
.journal-list { max-height: min(52svh, 450px); overflow: auto; border-top: 1px solid var(--line); }
.journal-entry { display: grid; grid-template-columns: 48px 1fr; gap: 14px; padding: 16px 2px; border-bottom: 1px solid var(--line); }
.journal-entry__number { color: var(--room-accent); font: 11px var(--mono); }
.journal-entry h3 { margin: 0 0 4px; font: 20px var(--serif); font-weight: 400; }
.journal-entry p { margin: 0; color: #68675f; font: 13px/1.6 var(--serif); }
.journal-entry small { display: block; margin-top: 7px; color: var(--muted); font: 8px var(--mono); letter-spacing: .08em; }
.journal-empty { min-height: 155px; display: grid; place-items: center; color: var(--muted); text-align: center; font: italic 18px/1.6 var(--serif); }
.help-dialog { width: min(600px, calc(100vw - 32px)); }
.help-copy p { font: 15px/1.9 var(--serif); color: #4d4e48; }
.help-copy .help-keys { display: flex; flex-direction: column; gap: 9px; margin-top: 25px; color: var(--muted); font: 10px/1.6 var(--mono); }
.help-keys kbd { display: inline-block; min-width: 22px; margin-right: 4px; text-align: center; }
.finale-dialog { width: min(620px, calc(100vw - 32px)); text-align: center; }
.finale-dialog .dialog-head { text-align: left; }
.finale-dialog .dialog-head > div { margin-inline: auto; text-align: center; }
.finale-dialog .dialog-close { position: absolute; right: 20px; top: 20px; }
.finale-art { position: relative; height: 185px; margin: 18px auto 8px; overflow: hidden; background: radial-gradient(ellipse at center, #c4a474 0 2%, transparent 3%), radial-gradient(ellipse at center, rgba(198,156,101,.18), transparent 60%); }
.finale-art span { position: absolute; left: 50%; top: 50%; width: 135px; height: 135px; border: 1px solid rgba(130,100,58,.54); border-radius: 50%; transform: translate(-50%,-50%) rotate(-25deg) scaleX(.56); animation: finale-turn 17s linear infinite; }
.finale-art span:nth-child(2) { width: 175px; height: 105px; transform: translate(-50%,-50%) rotate(40deg) scaleY(.62); animation-direction: reverse; animation-duration: 23s; }
.finale-art span:nth-child(3) { width: 225px; height: 60px; transform: translate(-50%,-50%) rotate(-12deg); animation-duration: 31s; }
.finale-note { margin: 18px 0 30px; font: 17px/2 var(--serif); letter-spacing: .03em; }
.finale-note i { color: #847254; }
.finale-cta { display: inline-flex; align-items: center; justify-content: space-between; gap: 20px; min-height: 49px; margin: -6px auto 0; padding: 0 15px; border: 1px solid var(--ink); background: var(--ink); color: var(--paper); text-decoration: none; font-size: 15px; letter-spacing: .06em; transition: background .2s,color .2s; }
.finale-cta:hover { background: transparent; color: var(--ink); }
.finale-cta-note { margin: 10px auto 24px; color: var(--muted); font: 12px/1.6 var(--serif); }

.souvenir-dialog { width: min(900px, calc(100vw - 32px)); max-height: min(88svh, 820px); overflow-y: auto; padding: 29px 30px 18px; }
.souvenir-grid { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 15px; }
.souvenir-card { min-width: 0; display: flex; flex-direction: column; padding: 14px; border: 1px solid var(--line); background: rgba(255,255,255,.15); }
.souvenir-cover { height: 215px; position: relative; overflow: hidden; background: #19221e; color: var(--paper); }
.souvenir-cover::after { content: ''; position: absolute; inset: 0; background: linear-gradient(0deg, rgba(12,16,14,.84), rgba(12,16,14,.04) 76%); }
.souvenir-cover img { width: 100%; height: 100%; display: block; object-fit: cover; filter: saturate(.62); }
.souvenir-cover > span, .souvenir-cover > small { position: absolute; z-index: 1; left: 15px; }
.souvenir-cover > span { bottom: 36px; font: italic 24px/.92 var(--serif); letter-spacing: -.035em; }
.souvenir-cover > small { bottom: 13px; color: rgba(238,232,220,.76); font: 8px var(--mono); letter-spacing: .12em; }
.ep-cover { height: 215px; position: relative; overflow: hidden; background: #14201d; color: var(--paper); }
.ep-cover::after { content: ''; position: absolute; inset: 0; background: linear-gradient(0deg, rgba(9,16,14,.86), rgba(9,16,14,.04) 78%); }
.ep-cover img { width: 100%; height: 100%; display: block; object-fit: cover; filter: saturate(.62); }
.ep-cover > span, .ep-cover > small { position: absolute; z-index: 1; left: 15px; }
.ep-cover > span { bottom: 35px; font: italic 24px/.93 var(--serif); letter-spacing: .04em; }
.ep-cover > small { bottom: 13px; color: rgba(238,232,220,.76); font: 8px var(--mono); letter-spacing: .09em; }
.souvenir-card__copy { display: flex; flex: 1; flex-direction: column; align-items: flex-start; padding: 15px 2px 1px; }
.souvenir-card__copy .eyebrow { margin: 0 0 8px; font-size: 8px; }
.souvenir-card__copy h3 { margin: 0; font: 25px/1.1 var(--serif); font-weight: 400; }
.souvenir-card__copy p:not(.eyebrow) { margin: 9px 0 16px; color: #66645d; font: 13px/1.7 var(--serif); }
.souvenir-action { width: 100%; min-height: 46px; display: flex; align-items: center; justify-content: space-between; gap: 10px; margin-top: auto; padding: 0 13px; border: 1px solid var(--ink); background: var(--ink); color: var(--paper); text-decoration: none; font-size: 14px; letter-spacing: .04em; transition: background .2s,color .2s; }
.souvenir-action:hover { background: var(--gold); color: var(--ink); }
.souvenir-action span { font-size: 17px; }
.souvenir-card__copy--film { padding-top: 0; }
.souvenir-video { display: block; width: 100%; aspect-ratio: 16 / 9; height: auto; margin-top: 9px; background: #121715; object-fit: contain; }
.souvenir-action--secondary { margin-top: 11px; background: transparent; color: var(--ink); }
.souvenir-action--secondary:hover { background: var(--paper-deep); }
.souvenir-public-package { display: inline-flex; align-items: center; gap: 8px; min-height: 44px; margin-top: 10px; color: var(--muted); font-size: 12px; text-underline-offset: 4px; }
.souvenir-public-package span { color: var(--ink); font-size: 16px; }
.souvenir-credit-note { margin: 2px 0 0; font-size: 10px; }
@media (max-width: 900px) and (min-width: 701px) {
  .souvenir-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
}

.is-exhibition-mode { position: fixed; z-index: 200; inset: 0; min-height: 100svh; padding: 0; background: #0f1411; }
.is-exhibition-mode .exhibition { grid-template-columns: 0 minmax(0,1fr) 0; grid-template-rows: minmax(0,1fr) 0; gap: 0; }
.is-exhibition-mode .masthead, .is-exhibition-mode .room-rail, .is-exhibition-mode .instrument-panel, .is-exhibition-mode .exhibition-footer { visibility: hidden; opacity: 0; pointer-events: none; }
.is-exhibition-mode .stage { grid-column: 2; grid-row: 1; }
.is-exhibition-mode .stage-title { left: clamp(28px, 8vw, 140px); }
.is-exhibition-mode .exhibition-exit { display: inline-grid; }
.is-exhibition-mode .stage-hint { opacity: .8; }

@keyframes breathe { 0%,100% { opacity: .55; transform: scale(.85); } 50% { opacity: 1; transform: scale(1.15); } }
@keyframes finale-turn { to { rotate: 360deg; } }

@media (min-width: 1600px) {
  .museum-shell { padding-inline: 42px; }
  .exhibition { grid-template-columns: 76px minmax(0,1fr) 330px; column-gap: 22px; }
  .instrument-panel { padding-left: 12px; }
  .stage-title h1 { font-size: clamp(88px, 6.2vw, 128px); }
}
@media (max-height: 780px) and (min-width: 701px) {
  .masthead { height: 62px; flex-basis: 62px; }
  .exhibition { grid-template-rows: minmax(0,1fr) 48px; }
  .instrument-panel__group { padding-block: 11px; }
  .instrument-panel__group--variation { padding-bottom: 12px; }
  .text-action { min-height: 32px; }
  .stage-title__kicker { margin-bottom: 14px; }
  .stage-title h1 { font-size: clamp(53px,6vw,82px); }
  .stage-title__poem { margin: 15px 0 19px; }
}
@media (max-width: 1100px) and (min-width: 701px) {
  .museum-shell { padding-inline: 17px; }
  .exhibition { grid-template-columns: 54px minmax(0,1fr) 260px; column-gap: 11px; }
  .stage-title { left: clamp(22px,4vw,44px); width: min(55%,460px); }
  .stage-title h1 { font-size: clamp(54px,6.2vw,78px); }
  .stage-title__poem { font-size: 13px; }
  .footer-center { gap: 8px; font-size: 8px; }
  .footer-center__quote { display: none; }
  .footer-actions { gap: 13px; }
}
@media (max-width: 700px) {
  .museum-shell { min-height: 100svh; padding: 0 12px; overflow: visible; }
  .masthead { height: 60px; flex: 0 0 60px; grid-template-columns: 1fr auto; }
  .masthead__center { display: none; }
  .masthead__right { gap: 10px; }
  .edition { font-size: 8px; }
  .wordmark__mark { width: 27px; height: 27px; font-size: 18px; }
  .wordmark__text { font-size: 8px; }
  .wordmark__text i { font-size: 11px; }
  .exhibition { flex: 0 0 auto; min-height: initial; display: grid; grid-template-columns: 1fr; grid-template-rows: minmax(425px, 57svh) 48px auto auto; gap: 0; }
  .stage { grid-column: 1; grid-row: 1; min-height: 425px; }
  .stage::before { background-position: 62% center; }
  #artCanvas { opacity: .52; }
  .stage.is-entered #artCanvas { opacity: .96; }
  .stage-topline { inset: 14px 13px auto; font-size: 8px; }
  .stage-title { left: 22px; top: 47%; transform: translateY(-38%); width: min(78%,390px); }
  .stage.is-entered .stage-title { top: 61px; left: 19px; width: min(69%,290px); }
  .stage-title__kicker { font-size: 7px; margin-bottom: 18px; }
  .stage-title h1 { font-size: clamp(58px, 16vw, 82px); }
  .stage-title__zh { font-size: 12px; margin-top: 16px; }
  .stage-title__poem { margin: 14px 0 19px; font-size: 13px; }
  .enter-button { min-width: 135px; height: 39px; }
  .stage-hint { right: 12px; bottom: 13px; font-size: 6px; gap: 6px; }
  .stage-coordinates { left: 13px; bottom: 13px; font-size: 7px; gap: 9px; }
  .room-rail { grid-column: 1; grid-row: 2; flex-direction: row; justify-content: center; border-right: 0; border-bottom: 1px solid var(--line); gap: 13px; }
  .rail-caption { writing-mode: initial; transform: none; margin: 0; font-size: 7px; }
  .room-rail__items { flex-direction: row; gap: 2px; }
  .room-nav-button { width: 31px; height: 31px; font-size: 9px; }
  .rail-foot { flex-direction: row; gap: 4px; margin: 0; }
  .rail-foot > span:first-child { writing-mode: initial; transform: none; font-size: 8px; }
  .rail-foot__line { width: 15px; height: 1px; }
  .rail-foot__label { display: none; }
  .instrument-panel { grid-column: 1; grid-row: 3; padding: 0 2px; display: grid; grid-template-columns: 1fr 1fr; column-gap: 17px; }
  .instrument-panel__top { grid-column: 1/-1; padding: 13px 0 9px; }
  .instrument-panel__group { padding: 15px 0 13px; }
  .instrument-panel__group--sound, .instrument-panel__group--variation { grid-column: 1/-1; }
  .instrument-panel__group--sound { padding-top: 13px; }
  .sound-export-mobile { display: flex; }
  .instrument-panel__group--variation { padding-bottom: 13px; }
  .instrument-panel__actions { grid-column: 1/-1; padding-top: 0; }
  .instrument-panel__bottom { grid-column: 1/-1; margin-top: 0; padding: 12px 0; }
  .exhibition-footer { grid-column: 1; grid-row: 4; min-height: 58px; border-top: 1px solid var(--line); gap: 10px; }
  .footer-center { display: none; }
  .footer-actions { margin-left: auto; gap: 12px; }
  .step-button { font-size: 10px; gap: 5px; }
  .step-button span { display: none; }
  .footer-tool { font-size: 11px; }
  .footer-tool:nth-child(2) { display: none; }
  .museum-dialog { padding: 22px 17px 14px; }
  .dialog-head h2 { font-size: 27px; }
  .dialog-intro { font-size: 12px; margin: 15px 0; }
  .atlas-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .atlas-card { min-height: 0; padding: 8px; }
  .atlas-card__image { height: 86px; margin-bottom: 8px; }
  .atlas-card strong { font-size: 19px; }
  .atlas-card__poem { font-size: 9px; }
  .atlas-card__action { font-size: 7px; }
  .journal-list { max-height: 50svh; }
  .souvenir-dialog { width: calc(100vw - 24px); max-height: calc(100svh - 24px); padding: 20px 14px 12px; }
  .souvenir-grid { grid-template-columns: 1fr; gap: 11px; }
  .souvenir-card { padding: 10px; }
  .souvenir-card--catalogue { display: grid; grid-template-columns: minmax(90px,.76fr) minmax(0,1.24fr); align-items: stretch; gap: 12px; }
  .souvenir-cover { height: 168px; }
  .souvenir-cover > span { left: 9px; bottom: 31px; font-size: 18px; }
  .souvenir-cover > small { left: 9px; bottom: 9px; font-size: 6px; }
  .souvenir-card__copy { padding: 3px 0 0; }
  .souvenir-card__copy .eyebrow { margin-bottom: 7px; font-size: 7px; }
  .souvenir-card__copy h3 { font-size: 20px; }
  .souvenir-card__copy p:not(.eyebrow) { margin: 7px 0 10px; font-size: 12px; line-height: 1.5; }
  .souvenir-action { min-height: 44px; padding-inline: 9px; font-size: 12px; }
  .souvenir-card--film { display: flex; }
  .souvenir-card__copy--film { padding-top: 2px; }
  .souvenir-card--film .souvenir-card__copy p:not(.eyebrow) { margin-bottom: 5px; }
  .souvenir-video { margin-top: 6px; }
  .souvenir-card--ep { display: grid; grid-template-columns: minmax(90px,.76fr) minmax(0,1.24fr); align-items: stretch; gap: 12px; }
  .ep-cover { height: 168px; }
  .ep-cover > span { left: 9px; bottom: 31px; font-size: 17px; }
  .ep-cover > small { left: 9px; bottom: 9px; font-size: 6px; }
  .souvenir-dialog .dialog-foot { margin-top: 12px; }
  .finale-cta { min-height: 46px; font-size: 14px; }
  .finale-cta-note { margin-bottom: 18px; font-size: 11px; }
  .dialog-foot { font-size: 7px; }
  .is-exhibition-mode { overflow: hidden; }
  .is-exhibition-mode .exhibition { grid-template-columns: 0 minmax(0,1fr) 0; grid-template-rows: minmax(0,1fr) 0; }
  .is-exhibition-mode .stage-title { left: 28px; width: 75%; }
}
@media (max-width: 380px) {
  .museum-shell { padding-inline: 9px; }
  .exhibition { grid-template-rows: minmax(405px, 55svh) 44px auto auto; }
  .stage { min-height: 405px; }
  .rail-caption { display: none; }
  .room-nav-button { width: 29px; height: 29px; }
  .stage-title h1 { font-size: 58px; }
  .footer-actions { gap: 9px; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
}