/* Xyncema Vault — big plates, caption typography. Pure white ground, one ultramarine accent, square
   corners, and captions set like wall labels under every image. */

[data-theme="museum"] body { background: var(--bg); color: var(--text); font-family: var(--font-body); }
.mu-wrap { width: min(100% - 2.5rem, 80rem); margin-inline: auto; }
.mu-narrow { max-width: 40rem; }
.mu-muted { color: var(--muted); }
.mu-h1, .mu-h2, .mu-h3 { font-family: var(--font-heading); font-weight: 400; line-height: 1; margin: 0; letter-spacing: -0.01em; }
.mu-h1 { font-size: clamp(3rem, 1.6rem + 6vw, 7rem); line-height: 0.92; }
.mu-h2 { font-size: clamp(2rem, 1.3rem + 2.8vw, 3.5rem); line-height: 0.98; }
.mu-h3 { font-size: clamp(1.45rem, 1.2rem + 0.9vw, 1.9rem); line-height: 1.05; }
.mu-h4 { font: 600 0.95rem/1.35 var(--font-body); margin: 0; }
.mu-label { font: 600 0.75rem/1.35 var(--font-body); letter-spacing: 0.1em; text-transform: uppercase; margin: 0 0 1rem; }
.mu-lead { font-size: clamp(1.02rem, 0.98rem + 0.3vw, 1.18rem); line-height: 1.65; color: var(--muted); }
.mu-cap { font-size: 0.8125rem; line-height: 1.5; color: var(--muted); margin: 0.6rem 0 0; display: flex; gap: 0.6rem; }
.mu-cap b { color: var(--text); font-weight: 600; }
.mu-plate img { width: 100%; display: block; object-fit: cover; }

/* ---------- Header ---------- */
.mu-notice { border-bottom: 1px solid var(--border); font-size: 0.8125rem; line-height: 1.45; padding: 0.55rem 0; color: var(--muted); }
.mu-notice p { margin: 0; }
.mu-header { position: sticky; top: 0; z-index: 30; background: var(--bg); border-bottom: 1px solid var(--text); }
.mu-header__row { display: flex; align-items: center; gap: 1.25rem; min-height: 4.25rem; }
.mu-logo { display: grid; gap: 0.1rem; text-decoration: none; color: var(--text); margin-right: auto; }
.mu-logo span { font-family: var(--font-heading); font-size: 1.75rem; line-height: 1; }
.mu-logo small { font: 600 0.6875rem/1 var(--font-body); letter-spacing: 0.14em; text-transform: uppercase; color: var(--muted); }
.mu-nav { display: flex; gap: 1.5rem; }
.mu-nav a { color: var(--text); text-decoration: none; font-size: 0.9375rem; padding: 0.3rem 0; border-bottom: 1px solid transparent; }
.mu-nav a:hover { border-bottom-color: var(--text); }
.mu-nav a[aria-current="page"] { color: var(--primary-ink); border-bottom-color: var(--primary); }
.mu-toggle { display: none; background: none; border: 1px solid var(--text); width: 2.75rem; height: 2.75rem; padding: 0.6rem; color: var(--text); cursor: pointer; }
.mu-toggle svg { width: 100%; height: 100%; }
.mu-mobile { display: none; flex-direction: column; padding-bottom: 1rem; }
.mu-mobile a { padding: 0.8rem 0; border-top: 1px solid var(--border); color: var(--text); text-decoration: none; }
.mu-mobile[data-open] { display: flex; }
@media (max-width: 880px) { .mu-nav, .mu-header .mu-btn { display: none; } .mu-toggle { display: block; } }

/* ---------- Buttons ---------- */
.mu-btn { display: inline-flex; align-items: center; justify-content: center; gap: 0.55rem; min-height: 3rem; padding: 0 1.4rem; border: 1px solid var(--primary); background: var(--primary); color: var(--on-primary); font: 600 0.9375rem/1 var(--font-body); text-decoration: none; cursor: pointer; }
.mu-btn:hover { background: #00227A; border-color: #00227A; }
.mu-btn--line { background: transparent; color: var(--text); border-color: var(--text); }
.mu-btn--line:hover { background: var(--text); color: var(--bg); border-color: var(--text); }
.mu-btn svg { width: 1.05rem; height: 1.05rem; }
.mu-link { color: var(--primary-ink); font-weight: 600; text-decoration: underline; text-underline-offset: 3px; }

/* ---------- Sections ---------- */
.mu-section { padding-block: clamp(3.25rem, 2rem + 4.5vw, 6rem); }
.mu-section + .mu-section { border-top: 1px solid var(--border); }
.mu-section--dark { background: var(--surface-2); color: var(--on-surface-2); }
.mu-section--dark .mu-muted, .mu-section--dark .mu-lead { color: var(--on-surface-2); opacity: 0.78; }
.mu-section--grey { background: var(--surface); }
.mu-head { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 1rem clamp(2rem, 4vw, 4rem); align-items: end; margin-bottom: clamp(2rem, 3vw, 3rem); }
.mu-head .mu-lead { margin: 0; }
@media (max-width: 820px) { .mu-head { grid-template-columns: minmax(0, 1fr); } }

/* ---------- Hero ---------- */
.mu-hero { padding-block: clamp(2rem, 1.5rem + 2.5vw, 3.5rem) 0; }
.mu-hero__title { display: grid; grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr); gap: 1.5rem clamp(2rem, 4vw, 4rem); align-items: end; margin-bottom: clamp(1.75rem, 3vw, 2.75rem); }
.mu-hero__copy { margin: 0; line-height: 1.7; color: var(--muted); }
.mu-hero__actions { display: flex; flex-wrap: wrap; gap: 0.7rem; margin-top: 1.25rem; }
.mu-hero .mu-plate img { height: min(62vh, 620px); }
@media (max-width: 820px) { .mu-hero__title { grid-template-columns: minmax(0, 1fr); } .mu-hero .mu-plate img { height: min(52vh, 420px); } }

/* ---------- Exhibition list ---------- */
.mu-exs { display: grid; gap: clamp(2.5rem, 4vw, 4rem); }
.mu-ex { display: grid; grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr); gap: clamp(1.5rem, 3vw, 3rem); align-items: end; }
.mu-ex:nth-child(even) { grid-template-columns: minmax(0, 1fr) minmax(0, 1.4fr); }
.mu-ex:nth-child(even) .mu-plate { order: 2; }
.mu-ex .mu-plate img { aspect-ratio: 3 / 2; }
.mu-ex .mu-plate--tall img { aspect-ratio: 4 / 5; max-height: 34rem; }
.mu-ex__body { display: grid; gap: 0.9rem; padding-bottom: 0.5rem; }
.mu-ex__body h3 a { color: inherit; text-decoration: none; }
.mu-ex__body h3 a:hover { color: var(--primary-ink); }
.mu-ex__body p { margin: 0; line-height: 1.7; color: var(--muted); }
.mu-when { display: inline-flex; gap: 0.5rem; align-items: center; font: 600 0.8125rem/1 var(--font-body); }
.mu-when i { width: 0.55rem; height: 0.55rem; border-radius: 50%; background: var(--primary); display: inline-block; }
.mu-when--upcoming i { background: transparent; border: 1.5px solid var(--primary); }
.mu-when--permanent i { background: var(--text); }
@media (max-width: 820px) { .mu-ex, .mu-ex:nth-child(even) { grid-template-columns: minmax(0, 1fr); } .mu-ex:nth-child(even) .mu-plate { order: 0; } }

/* ---------- Booking ---------- */
.mu-book { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 21rem); gap: clamp(1.5rem, 3vw, 2.5rem); align-items: start; }
.mu-form { display: grid; gap: 2rem; }
.mu-step { border: 0; margin: 0; padding: 0; }
.mu-step > legend { font: 600 0.75rem/1 var(--font-body); letter-spacing: 0.12em; text-transform: uppercase; padding: 0; margin-bottom: 0.9rem; }
.mu-modes { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0.6rem; }
.mu-modes label { display: grid; gap: 0.2rem; padding: 0.95rem 1rem; border: 1px solid var(--border); cursor: pointer; background: var(--bg); }
.mu-modes label:hover { border-color: var(--text); }
.mu-modes input { position: absolute; opacity: 0; width: 0; height: 0; }
.mu-modes b { font-family: var(--font-heading); font-weight: 400; font-size: 1.35rem; line-height: 1.1; }
.mu-modes span { font-size: 0.875rem; color: var(--muted); line-height: 1.5; }
.mu-modes label:has(input:checked) { border-color: var(--primary); box-shadow: inset 0 0 0 1px var(--primary); }
.mu-modes label:has(input:focus-visible) { outline: 2px solid var(--focus); outline-offset: 2px; }
.mu-days { display: grid; grid-template-columns: repeat(auto-fill, minmax(4.3rem, 1fr)); gap: 0.4rem; }
.mu-day { display: grid; gap: 0.1rem; justify-items: center; padding: 0.55rem 0.3rem; border: 1px solid var(--border); background: var(--bg); color: var(--text); cursor: pointer; font: inherit; }
.mu-day small { font-size: 0.6875rem; color: var(--muted); text-transform: uppercase; letter-spacing: 0.06em; }
.mu-day b { font-family: var(--font-heading); font-weight: 400; font-size: 1.45rem; line-height: 1; }
.mu-day:hover:not(:disabled) { border-color: var(--text); }
.mu-day[aria-pressed="true"] { background: var(--primary); border-color: var(--primary); color: var(--on-primary); }
.mu-day[aria-pressed="true"] small { color: var(--on-primary); opacity: 0.85; }
.mu-day:disabled { cursor: not-allowed; color: #A3A39F; background: var(--surface); }
.mu-day:disabled b { text-decoration: line-through; }
.mu-slots { display: grid; grid-template-columns: repeat(auto-fill, minmax(6.6rem, 1fr)); gap: 0.4rem; }
.mu-slot { display: grid; gap: 0.2rem; padding: 0.6rem 0.5rem; border: 1px solid var(--border); background: var(--bg); color: var(--text); cursor: pointer; font: inherit; text-align: left; }
.mu-slot b { font: 600 1rem/1 var(--font-body); font-variant-numeric: tabular-nums; }
.mu-slot small { font-size: 0.75rem; color: var(--muted); }
.mu-slot em { font-style: normal; font-size: 0.6875rem; font-weight: 600; letter-spacing: 0.06em; text-transform: uppercase; color: var(--primary-ink); }
.mu-slot:hover:not(:disabled) { border-color: var(--text); }
.mu-slot[aria-pressed="true"] { background: var(--primary); border-color: var(--primary); color: var(--on-primary); }
.mu-slot[aria-pressed="true"] small, .mu-slot[aria-pressed="true"] em { color: var(--on-primary); }
.mu-slot:disabled { cursor: not-allowed; color: #A3A39F; background: var(--surface); }
.mu-slot:disabled b { text-decoration: line-through; }
.mu-tix { display: grid; }
.mu-tix__row { display: grid; grid-template-columns: minmax(0, 1fr) auto auto; gap: 1rem; align-items: center; padding: 0.8rem 0; border-top: 1px solid var(--border); }
.mu-tix__row:last-child { border-bottom: 1px solid var(--border); }
.mu-tix__row b { display: block; font-weight: 600; }
.mu-tix__row small { color: var(--muted); font-size: 0.8125rem; }
.mu-tix__price { font-variant-numeric: tabular-nums; font-size: 0.9375rem; min-width: 5.5rem; text-align: right; }
.mu-stepper { display: inline-grid; grid-template-columns: 2.5rem 2.3rem 2.5rem; align-items: center; border: 1px solid var(--text); }
.mu-stepper button { height: 2.5rem; border: 0; background: none; cursor: pointer; color: var(--text); display: grid; place-items: center; }
.mu-stepper button:hover:not(:disabled) { background: var(--surface); }
.mu-stepper button:disabled { opacity: 0.3; cursor: not-allowed; }
.mu-stepper button svg { width: 1rem; height: 1rem; }
.mu-stepper output { text-align: center; font-weight: 600; font-variant-numeric: tabular-nums; }
.mu-msg { margin: 0.8rem 0 0; font-size: 0.9125rem; line-height: 1.55; padding: 0.7rem 0.85rem; background: var(--surface); border-left: 2px solid var(--primary); }
.mu-msg--warn { border-left-color: var(--danger); }
.mu-fields { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1rem; }
.mu-summary { position: sticky; top: 5.5rem; border: 1px solid var(--text); padding: 1.35rem; display: grid; gap: 1rem; background: var(--bg); }
.mu-summary h3 { font-family: var(--font-heading); font-weight: 400; font-size: 1.6rem; margin: 0; line-height: 1; }
.mu-sum { list-style: none; margin: 0; padding: 0; display: grid; }
.mu-sum li { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 1rem; padding: 0.55rem 0; border-bottom: 1px solid var(--border); font-size: 0.9125rem; }
.mu-sum .mu-v { font-variant-numeric: tabular-nums; text-align: right; }
.mu-total { display: grid; grid-template-columns: minmax(0, 1fr) auto; align-items: baseline; gap: 1rem; }
.mu-total b { font: 600 0.75rem/1 var(--font-body); letter-spacing: 0.1em; text-transform: uppercase; }
.mu-total span { font-family: var(--font-heading); font-size: 2rem; line-height: 1; font-variant-numeric: tabular-nums; }
.mu-ticket { border: 1px solid var(--text); padding: clamp(1.25rem, 3vw, 2rem); display: grid; gap: 1rem; background: var(--bg); position: relative; }
.mu-ticket::before, .mu-ticket::after { content: ""; position: absolute; top: 50%; width: 1.4rem; height: 1.4rem; border-radius: 50%; background: var(--bg); border: 1px solid var(--text); transform: translateY(-50%); }
.mu-ticket::before { left: -0.75rem; clip-path: inset(0 0 0 50%); }
.mu-ticket::after { right: -0.75rem; clip-path: inset(0 50% 0 0); }
.mu-ok { display: grid; grid-template-columns: auto 1fr; gap: 0.6rem; align-items: start; font-weight: 600; margin: 0; }
.mu-ok svg { width: 1.2rem; height: 1.2rem; color: var(--primary-ink); margin-top: 0.1rem; }
@media (max-width: 980px) { .mu-book { grid-template-columns: minmax(0, 1fr); } .mu-summary { position: static; } }
@media (max-width: 600px) { .mu-modes, .mu-fields { grid-template-columns: minmax(0, 1fr); } .mu-tix__row { grid-template-columns: minmax(0, 1fr) auto; } .mu-tix__price { grid-column: 1; grid-row: 2; text-align: left; } .mu-tix__row .mu-stepper { grid-row: 1 / span 2; grid-column: 2; } }

/* ---------- Visit / access / honesty ---------- */
.mu-visit { display: grid; grid-template-columns: minmax(0, 20rem) minmax(0, 1fr); gap: clamp(2rem, 4vw, 4rem); align-items: start; }
.mu-visit .mu-plate img { aspect-ratio: 4 / 5; }
.mu-facts { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0 2rem; margin: 0; }
.mu-facts div { padding: 1rem 0; border-top: 1px solid var(--border); display: grid; gap: 0.3rem; }
.mu-facts dt { font: 600 0.75rem/1 var(--font-body); letter-spacing: 0.1em; text-transform: uppercase; }
.mu-facts dd { margin: 0; line-height: 1.6; color: var(--muted); }
.mu-access { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: clamp(2rem, 4vw, 4rem); align-items: start; }
.mu-access ul, .mu-honesty ul { list-style: none; margin: 0; padding: 0; display: grid; }
.mu-access li { padding: 0.85rem 0; border-top: 1px solid var(--border); line-height: 1.6; display: grid; grid-template-columns: auto 1fr; gap: 0.7rem; }
.mu-access li::before { content: "—"; color: var(--primary-ink); }
.mu-honesty li { padding: 0.9rem 0; border-top: 1px solid rgba(255,255,255,0.22); line-height: 1.6; display: grid; grid-template-columns: auto 1fr; gap: 0.7rem; }
.mu-honesty li::before { content: "×"; color: var(--primary-on-dark); }
@media (max-width: 860px) { .mu-visit, .mu-access, .mu-facts { grid-template-columns: minmax(0, 1fr); } .mu-visit .mu-plate { max-width: 20rem; } }

/* ---------- Collection ---------- */
.mu-pagehead { padding-block: clamp(2.5rem, 2rem + 3vw, 4.5rem) clamp(1.5rem, 2vw, 2rem); }
.mu-chips { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-top: 1.75rem; }
.mu-chip { min-height: 2.6rem; padding: 0 1rem; border: 1px solid var(--text); background: var(--bg); font: 500 0.9rem/1 var(--font-body); color: var(--text); cursor: pointer; }
.mu-chip[aria-pressed="true"] { background: var(--text); color: var(--bg); }

/* ---------- Detail ---------- */
.mu-dhead { padding-block: clamp(2rem, 1.5rem + 2.5vw, 3.5rem) clamp(1.5rem, 2vw, 2rem); }
.mu-crumb { font-size: 0.875rem; color: var(--muted); margin: 0 0 1.25rem; }
.mu-crumb a { color: var(--muted); }
.mu-dhead__grid { display: grid; grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr); gap: 1.25rem clamp(2rem, 4vw, 4rem); align-items: end; }
.mu-dplate img { aspect-ratio: 21 / 9; }
.mu-dplate--tall img { aspect-ratio: 16 / 9; object-position: 50% 40%; }
.mu-cols { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 20rem); gap: clamp(2rem, 4vw, 4rem); align-items: start; }
.mu-prose p { font-size: 1.05rem; line-height: 1.8; margin: 0 0 1.1rem; max-width: 40rem; }
.mu-rooms { list-style: none; margin: 1.25rem 0 0; padding: 0; counter-reset: rm; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0 2rem; }
.mu-rooms li { counter-increment: rm; padding: 1.1rem 0; border-top: 1px solid var(--text); display: grid; gap: 0.35rem; }
.mu-rooms li::before { content: counter(rm, upper-roman); font-family: var(--font-heading); font-size: 1.1rem; color: var(--primary-ink); }
.mu-rooms p { margin: 0; color: var(--muted); line-height: 1.6; font-size: 0.9375rem; }
.mu-aside { display: grid; gap: 1.25rem; position: sticky; top: 5.5rem; }
.mu-box { border: 1px solid var(--border); padding: 1.15rem; display: grid; gap: 0.6rem; }
.mu-box ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 0.5rem; font-size: 0.9125rem; line-height: 1.55; color: var(--muted); }
.mu-thumbs { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1rem; margin-top: 1.25rem; }
.mu-thumb { padding: 0; border: 0; background: none; cursor: pointer; text-align: left; font: inherit; color: inherit; }
.mu-thumb img { width: 100%; aspect-ratio: 4 / 5; object-fit: cover; display: block; transition: opacity .2s; }
.mu-thumb:hover img { opacity: 0.85; }
@media (max-width: 940px) { .mu-cols, .mu-dhead__grid { grid-template-columns: minmax(0, 1fr); } .mu-aside { position: static; } }
@media (max-width: 600px) { .mu-rooms, .mu-thumbs { grid-template-columns: minmax(0, 1fr); } .mu-thumbs { grid-template-columns: repeat(2, minmax(0, 1fr)); } }

/* ---------- FAQ ---------- */
.mu-faq details { border-top: 1px solid var(--border); }
.mu-faq details:last-of-type { border-bottom: 1px solid var(--border); }
.mu-faq summary { cursor: pointer; padding: 1.1rem 0; font-family: var(--font-heading); font-size: 1.4rem; line-height: 1.2; list-style: none; display: grid; grid-template-columns: 1fr auto; gap: 1rem; }
.mu-faq summary::-webkit-details-marker { display: none; }
.mu-faq summary::after { content: "+"; font-family: var(--font-body); color: var(--primary-ink); }
.mu-faq details[open] summary::after { content: "–"; }
.mu-faq p { margin: 0 0 1.2rem; color: var(--muted); line-height: 1.7; max-width: 46rem; }

/* ---------- Footer ---------- */
.mu-footer { background: var(--surface-2); color: var(--on-surface-2); padding-block: clamp(2.5rem, 2rem + 3vw, 4rem) 2rem; }
.mu-footer__grid { display: grid; grid-template-columns: minmax(0, 1.5fr) repeat(3, minmax(0, 1fr)); gap: 2rem; }
.mu-footer .mu-logo { color: var(--on-surface-2); }
.mu-footer .mu-logo small { color: var(--primary-on-dark); }
.mu-footer p { color: var(--on-surface-2); opacity: 0.8; line-height: 1.7; font-size: 0.9rem; margin: 0.9rem 0 0; }
.mu-footer h3 { font: 600 0.75rem/1 var(--font-body); letter-spacing: 0.12em; text-transform: uppercase; color: var(--primary-on-dark); margin: 0 0 0.9rem; }
.mu-footer ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 0.55rem; }
.mu-footer a { color: var(--on-surface-2); text-decoration: none; font-size: 0.9rem; }
.mu-footer a:hover { text-decoration: underline; }
.mu-footer__note { margin-top: 2.25rem; padding-top: 1.4rem; border-top: 1px solid rgba(255,255,255,0.2); font-size: 0.8125rem; line-height: 1.7; opacity: 0.75; }
.mu-footer .xy-attribution { opacity: 0.75; }
.mu-footer .xy-attribution a { text-decoration: underline; }
@media (max-width: 820px) { .mu-footer__grid { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 520px) { .mu-footer__grid { grid-template-columns: minmax(0, 1fr); } }