/* Pass 76: sitewide navigation, mobile retention, and public-facing consistency. */
.reading-progress{position:fixed;z-index:1600;top:0;left:0;width:100%;height:2px;pointer-events:none;background:transparent}
.reading-progress span{display:block;width:100%;height:100%;transform:scaleX(0);transform-origin:left;background:#d5a957;box-shadow:0 0 8px rgba(213,169,87,.5)}
.back-to-top{position:fixed;z-index:1250;right:18px;bottom:18px;min-width:48px;padding:10px 12px;border:1px solid rgba(214,170,87,.52);border-radius:999px;background:rgba(2,17,23,.94);color:#e8cf97;font:700 .67rem/1 var(--nav);letter-spacing:.08em;text-transform:uppercase;opacity:0;pointer-events:none;transform:translateY(8px);transition:.2s ease}
.back-to-top.visible{opacity:1;pointer-events:auto;transform:none}
.mobile-explore{display:none}
.mobile-caption-toggle{display:none}
.main-nav a{white-space:nowrap}
.main-nav a:focus-visible,.museum-jumpbar a:focus-visible,.mobile-explore a:focus-visible,.back-to-top:focus-visible{outline:2px solid #f0cb7b;outline-offset:3px}
.dossier-hero-image{margin:22px 0 4px;border:1px solid rgba(214,170,87,.3);background:#031016;overflow:hidden}
.dossier-hero-image button{display:block;width:100%;padding:0;border:0;background:#031016;cursor:zoom-in;text-align:left}
.dossier-hero-image img{display:block;width:100%;max-height:620px;object-fit:contain;background:#031016}
.dossier-hero-image figcaption{padding:11px 14px;color:#acbcb8;background:#061820;font-size:.8rem;line-height:1.45}
.evidence-alert.public-summary{border-left-color:#d8aa52;background:rgba(5,25,31,.72)}

@media (max-width:980px){
  .site-header{position:sticky!important;top:0;z-index:1500}
  .menu-button{position:relative;z-index:2}
  .main-nav{position:fixed!important;inset:70px 10px auto!important;max-height:calc(100dvh - 84px);overflow:auto;display:none!important;grid-template-columns:repeat(2,minmax(0,1fr));gap:7px;padding:12px!important;border:1px solid rgba(214,170,87,.35);background:rgba(2,15,20,.985)!important;box-shadow:0 22px 60px rgba(0,0,0,.62)}
  body.nav-open .main-nav{display:grid!important}
  .main-nav a,.main-nav button{display:flex!important;align-items:center;justify-content:center;min-height:44px;padding:9px!important;border:1px solid rgba(214,170,87,.18);text-align:center}
  .main-nav .search-button{grid-column:1/-1}
  .museum-jumpbar{display:none!important}
  .mobile-explore{display:block;position:fixed;z-index:1300;left:12px;bottom:12px}
  .mobile-explore-toggle,.mobile-explore-close{min-height:44px;border:1px solid rgba(214,170,87,.52);background:rgba(2,17,23,.96);color:#ecd193;font:700 .68rem/1 var(--nav);letter-spacing:.08em;text-transform:uppercase}
  .mobile-explore-toggle{padding:10px 14px;border-radius:999px;box-shadow:0 10px 30px rgba(0,0,0,.38)}
  .mobile-explore nav{position:fixed;inset:auto 10px 66px;display:none;grid-template-columns:repeat(2,minmax(0,1fr));gap:7px;max-height:calc(100dvh - 92px);overflow:auto;padding:12px;border:1px solid rgba(214,170,87,.38);background:rgba(2,15,20,.985);box-shadow:0 20px 70px rgba(0,0,0,.65)}
  .mobile-explore.open nav{display:grid}
  .mobile-explore nav a{display:flex;align-items:center;justify-content:center;min-height:48px;padding:10px;border:1px solid rgba(214,170,87,.2);color:#e3c789;font:700 .71rem/1.2 var(--nav);letter-spacing:.07em;text-align:center;text-transform:uppercase}
  .mobile-explore-close{grid-column:1/-1}
  .back-to-top{right:12px;bottom:12px}
}

@media (max-width:600px){
  .exhibit-plate{min-height:0!important;padding-bottom:18px!important}
  .room-gallery{display:grid!important;grid-auto-flow:column!important;grid-template-rows:repeat(2,minmax(0,1fr))!important;grid-auto-columns:minmax(142px,44vw)!important;overflow-x:auto!important;overscroll-behavior-inline:contain;scroll-snap-type:x proximity;padding:3px 2px 12px!important;gap:8px!important}
  .room-gallery .room-item{scroll-snap-align:start;min-width:0!important}
  .plate-caption.mobile-collapsible>p:nth-of-type(n+2){display:none}
  .plate-caption.mobile-collapsible.mobile-context-open>p:nth-of-type(n+2){display:block}
  .mobile-caption-toggle{display:inline-flex;margin:8px 0 4px;padding:8px 10px;border:1px solid rgba(214,170,87,.35);background:#061820;color:#dec184;font:700 .65rem/1 var(--nav);letter-spacing:.07em;text-transform:uppercase}
  .chapter-grid,.lobby-preview-grid{grid-template-columns:repeat(2,minmax(0,1fr))!important}
  .chapter-card,.lobby-preview-card{min-height:0!important}
  .chapter-card img{aspect-ratio:1/1;object-fit:cover}
  .source-grid{grid-template-columns:1fr!important}
  .dossier-hero-image img{max-height:74vh}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto!important}
  .back-to-top,.reading-progress span{transition:none!important}
}