:root{ --cream:#F6ECD8; --ink:#3A4356; }
  *{margin:0;padding:0;box-sizing:border-box}
  html,body{width:100%;height:100%;overflow:hidden;background:#0e1219;
    font-family:"Iowan Old Style","Palatino Linotype",Palatino,Georgia,"Songti SC",serif;
    color:var(--cream);-webkit-font-smoothing:antialiased}
  #app{position:fixed;inset:0}
  canvas{display:block;width:100%;height:100%;touch-action:none}
  /* ── veil ── */
  #veil{position:fixed;inset:0;z-index:40;display:flex;align-items:flex-end;justify-content:flex-start;
    background:linear-gradient(120deg,#102d35,#446a75 58%,#8da3a0);
    transition:opacity 1.4s cubic-bezier(.4,0,.2,1)}
  #veil.ready{background:linear-gradient(90deg,rgba(8,26,32,.83),rgba(8,26,32,.30) 55%,rgba(8,26,32,.06))}
  #veil.gone{opacity:0;pointer-events:none}
  #veil:before{content:"";position:absolute;inset:0;pointer-events:none;
    background:radial-gradient(70% 55% at 50% 55%, rgba(0,0,0,0) 40%, rgba(30,40,60,.32) 100%)}
  .card{position:relative;text-align:left;padding:clamp(28px,7vw,96px);max-width:760px}
  .kanji{font:10px/1.6 ui-sans-serif,sans-serif;letter-spacing:.26em;margin-bottom:26px;color:#d8c79e}
  h1{font-size:clamp(46px,7vw,84px);font-weight:400;letter-spacing:.1em;line-height:1.05;
    color:#f9f5e9;text-shadow:0 2px 18px rgba(0,0,0,.14)}
  h1 em{font-style:italic;display:block;font-size:.32em;letter-spacing:.10em;margin-top:15px;color:#d7e2d9}
  .rule{width:54px;height:1px;background:#d8c79e;opacity:.65;margin:26px 0}
  .blurb{font-size:15px;line-height:1.9;color:#d4ddd6;max-width:460px}
  #bar{width:230px;height:2px;background:rgba(240,237,223,.18);margin:32px 0 12px;overflow:hidden;border-radius:2px}
  #barIn{height:100%;width:0%;background:#dbc9a2;transition:width .3s ease}
  #stat{font:10px/1.5 ui-sans-serif,sans-serif;letter-spacing:.12em;text-transform:uppercase;color:#bdcec8;min-height:16px}
  #enter{margin-top:24px;display:none;cursor:pointer;border:1px solid #d9cca7;
    background:#ede5cd;color:#243f40;padding:16px 28px;border-radius:4px;
    font-family:inherit;font-size:13px;letter-spacing:.26em;text-transform:uppercase;
    transition:.35s;backdrop-filter:blur(3px)}
  #enter span{margin-left:32px;font-size:20px;line-height:0}
  #enter:hover{background:#fff5dd;transform:translateY(-2px)}
  #enter.on{display:inline-block;animation:rise .9s cubic-bezier(.2,.8,.2,1) both}
  @keyframes rise{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:none}}
  /* ── hud ── */
  #hint{display:none;position:fixed;bottom:17px;right:22px;z-index:20;pointer-events:none;
    font-size:12px;letter-spacing:.15em;text-transform:uppercase;opacity:0;transition:opacity 1.2s;
    text-shadow:0 1px 3px rgba(20,26,38,.7)}
  #hint.on{opacity:.5}
  #hint b{font-weight:600}
  #arrivalGuide{position:fixed;left:22px;bottom:calc(82px + env(safe-area-inset-bottom));z-index:28;
    width:min(410px,calc(100vw - 44px));padding:18px 20px;border:1px solid rgba(246,236,216,.28);border-radius:16px;
    background:rgba(28,43,44,.94);color:#f6ecd8;box-shadow:0 8px 28px rgba(12,22,27,.16);
    font:13px/1.6 ui-sans-serif,-apple-system,BlinkMacSystemFont,"PingFang SC",sans-serif;
    animation:rise .45s ease both}
  #arrivalGuide[hidden]{display:none}
  #arrivalGuide h2{font:400 21px/1.25 Georgia,"Songti SC",serif;padding-right:50px}
  #arrivalGuide p{margin-top:8px;color:#d3ded1;font-size:12px}
  #arrivalGuideClose{position:absolute;right:10px;top:8px;min-width:44px;min-height:44px;border:0;
    border-radius:10px;background:transparent;color:#f6ecd8;font:22px/1 sans-serif;cursor:pointer}
  .arrivalKeys{display:grid;grid-template-columns:1fr 1fr;gap:12px 16px;margin:17px 0 11px}
  .arrivalKeys div{display:flex;align-items:center;gap:9px}
  .arrivalKeys kbd{display:inline-grid;place-items:center;flex:0 0 28px;height:28px;border:1px solid #afbea9;
    border-radius:6px;color:#f7dfae;font:600 14px/1 ui-monospace,monospace}
  #arrivalGuide .arrivalMore{padding-top:10px;border-top:1px solid rgba(246,236,216,.15);line-height:1.9}
  .arrivalTouchHelp{display:none}
  @media(pointer:coarse){.arrivalTouchHelp{display:block}}
  @media(max-width:440px){#arrivalGuide{left:14px;width:calc(100vw - 28px);padding:16px}.arrivalKeys{gap:10px}}
  @media(prefers-reduced-motion:reduce){#arrivalGuide{animation:none}}
  body.menuOpen #arrivalGuide,body.mapOpen #arrivalGuide,body.reading #arrivalGuide{visibility:hidden;pointer-events:none}
  body.arrivalHelpOpen #paperPrompt{opacity:0;pointer-events:none}
  #toast{position:fixed;left:50%;bottom:76px;transform:translateX(-50%);z-index:26;
    max-width:min(780px,calc(100vw - 64px));white-space:nowrap;overflow:hidden;text-overflow:ellipsis;text-align:center;
    background:none;padding:3px 8px;font-size:12px;line-height:1.5;text-shadow:0 1px 5px #172722,0 0 2px #172722;
    letter-spacing:.08em;opacity:0;transition:.4s;
    pointer-events:none}
  body:has(#toast.on) #paperPrompt{visibility:hidden}
  #regionTag{position:fixed;left:50%;top:15%;z-index:19;transform:translate(-50%,10px);text-align:center;
    pointer-events:none;opacity:0;transition:opacity 1.2s,transform 1.2s;color:#fff5dc;
    text-shadow:0 2px 12px rgba(13,22,31,.72)}
  #regionTag.on{opacity:.82;transform:translate(-50%,0)}
  #regionTag b{display:block;font:400 28px/1.1 Georgia,"Songti SC",serif;letter-spacing:.20em}
  #regionTag span{display:block;margin-top:9px;font:500 11px/1 ui-sans-serif,-apple-system,sans-serif;
    letter-spacing:.32em;text-transform:uppercase;opacity:.62}
  /* The underwater lens is a deliberately cheap final-stage optical layer.
     It gives diving the red attenuation, moving caustic ceiling and peripheral
     extinction of a real water column without adding a second renderer or a
     full-screen framebuffer pass to the already long post chain. */
  #underwaterLens{position:fixed;inset:-8%;z-index:17;pointer-events:none;opacity:0;
    --uwx:0px;--uwy:0px;--uw-depth:0;--uw-rot:0deg;--uw-sunx:50%;
    background:
      linear-gradient(180deg,rgba(34,146,157,.08),rgba(1,42,62,.62)),
      radial-gradient(ellipse at var(--uw-sunx) 12%,rgba(143,226,207,.20),rgba(0,51,69,.22) 43%,rgba(0,18,35,.72) 100%);
    mix-blend-mode:multiply;transition:opacity .22s linear;will-change:opacity}
  #underwaterLens:before{content:"";position:absolute;inset:-18%;opacity:var(--uw-caustic,.12);
    background:
      repeating-radial-gradient(ellipse at 32% 6%,rgba(202,255,236,.22) 0 2px,transparent 3px 17px),
      repeating-radial-gradient(ellipse at 71% 2%,rgba(142,239,226,.16) 0 1px,transparent 3px 23px);
    /* This is only the refracted underside of the surface.  Geometry receives
       its own world-space caustics, so a vertical mask prevents this cheap
       screen layer from being mistaken for light painted onto the sea bed. */
    -webkit-mask-image:linear-gradient(to bottom,#000 0 28%,rgba(0,0,0,.72) 48%,transparent 76%);
    mask-image:linear-gradient(to bottom,#000 0 28%,rgba(0,0,0,.72) 48%,transparent 76%);
    mix-blend-mode:screen;filter:blur(1.1px);transform:translate3d(var(--uwx),var(--uwy),0) rotate(var(--uw-rot)) scale(1.12)}
  #underwaterLens:after{content:"";position:absolute;inset:0;
    background:radial-gradient(ellipse at 50% 38%,transparent 24%,rgba(0,29,48,.16) 67%,rgba(0,12,26,.58) 100%);
    opacity:var(--uw-vignette,.45)}
  /* Paper-world interactions stay in the scene: a quiet prompt and floating
     speech, rather than a dashboard card competing with the landscape. */
  #paperPrompt{position:fixed;left:50%;bottom:76px;z-index:25;transform:translate(-50%,10px);
    max-width:calc(100vw - 180px);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;padding:3px 8px;
    color:#fff2d3;font:600 12px/1.25 ui-sans-serif,-apple-system,BlinkMacSystemFont,"PingFang SC",sans-serif;
    letter-spacing:.16em;text-shadow:0 2px 9px rgba(12,20,28,.8);opacity:0;pointer-events:none;transition:opacity .35s,transform .35s}
  #paperPrompt.on{opacity:.88;transform:translate(-50%,0)}
  button{-webkit-tap-highlight-color:transparent}
  button:focus-visible,select:focus-visible,input:focus-visible,summary:focus-visible{
    outline:2px solid #f4dcae;outline-offset:3px}
  #paperMemorySearch{width:100%;min-height:44px;margin:12px 0;padding:10px 12px;border:1px solid rgba(246,236,216,.30);border-radius:9px;background:#263c3d;color:#f6ecd8;font:14px/1.4 ui-sans-serif,sans-serif}
  #paperMemorySearch::placeholder{color:#c3cdbf}
  .paperSearchLabel{display:block;font-size:12px;color:#d3ded1;margin-top:12px}
  #bookHud{position:fixed;left:calc(18px + env(safe-area-inset-left));bottom:calc(18px + env(safe-area-inset-bottom));z-index:27;
    width:64px;height:42px;opacity:0;pointer-events:none;transform:translateY(8px);overflow:visible;
    transition:opacity .24s,transform .24s}
  #bookHud.on{opacity:1;transform:none;pointer-events:auto}
  #bookHud button{flex:0 0 auto;height:36px;min-width:36px;padding:0 8px;border:0;border-radius:9px;
    background:rgba(238,237,219,.09);color:#f5f2e7;font:15px/1 ui-sans-serif,sans-serif;cursor:pointer;touch-action:manipulation}
  #bookHud button:disabled{opacity:.3;cursor:default}
  #bookHud #bookHandle{width:64px;height:42px;border:1px solid rgba(247,239,216,.25);border-radius:14px;
    background:rgba(22,35,33,.45);backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);font-size:12px;opacity:.48;
    transition:opacity .25s,background .25s}
  #bookHud.expanded #bookHandle,#bookHandle:hover,#bookHandle:focus-visible{opacity:1;background:rgba(22,35,33,.82)}
  #bookTools[hidden],#bookPaperPanel[hidden]{display:none}
  #bookTools{position:absolute;left:0;bottom:48px;width:min(328px,calc(100vw - 36px));padding:9px;border-radius:14px;
    color:#f5f2e7;background:rgba(22,35,33,.91);border:1px solid rgba(247,239,216,.22);box-shadow:0 8px 26px rgba(0,0,0,.15);
    backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);animation:bookDockReveal .18s ease-out}
  .bookPrimary{display:flex;align-items:center;gap:5px}
  #bookPage{flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;text-align:center;
    font:500 11px/1.4 ui-sans-serif,sans-serif;font-variant-numeric:tabular-nums;letter-spacing:.03em}
  .bookActions{display:flex;align-items:center;flex-wrap:wrap;gap:4px;margin-top:7px}
  #bookHud .zoomBtn{font:500 11px/1 ui-sans-serif,sans-serif}
  #bookZoomFit{font-size:10px!important;min-width:42px!important}
  #bookPaperPanel{border-top:1px solid rgba(247,239,216,.18);padding-top:9px;margin-top:9px}
  #bookPaperPanel label{display:flex;justify-content:space-between;font:12px/1.6 ui-sans-serif,sans-serif}
  #bookPaperPanel label span{font-size:10px;color:#c8d0c4}
  #bookPaperPanel input{display:block;width:100%;height:28px;margin:2px 0 6px;accent-color:#dccaaa;cursor:pointer;touch-action:pan-x}
  #bookPaperPanel .bookMotionRow{align-items:center;margin-top:3px}
  #bookMotion{max-width:150px;min-height:32px;padding:4px 8px;border:1px solid rgba(247,239,216,.25);border-radius:7px;background:#263b35;color:#f5f2e7;font:12px ui-sans-serif,sans-serif}
  #bookHud button:focus-visible,#bookPaperPanel input:focus-visible{outline:2px solid #f4dcae;outline-offset:2px}
  @keyframes bookDockReveal{from{opacity:0;transform:translateY(5px)}to{opacity:1;transform:none}}
  @media(prefers-reduced-motion:reduce){#bookTools{animation:none}#bookHud{transition:none}}
  body.reading #hint,body.reading #paperPrompt{opacity:.12}
  /* Keep the native file control reachable to Safari/Firefox while letting the
     scene-owned buttons provide the visual affordance. */
  #pdfPicker{position:absolute;width:1px;height:1px;opacity:0;overflow:hidden;clip:rect(0 0 0 0);clip-path:inset(50%);white-space:nowrap}
  #menuTouch{position:fixed;right:18px;top:18px;z-index:24;width:48px;height:48px;border-radius:999px;
    border:1px solid rgba(246,236,216,.26);background:rgba(24,35,40,.20);color:#fff2d3;
    font:21px/1 ui-sans-serif,-apple-system,sans-serif;cursor:pointer;opacity:0;pointer-events:none;
    backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);transition:opacity .8s,transform .16s}
  #menuTouch.on{opacity:.78;pointer-events:auto}#menuTouch:active{transform:scale(.94)}
  #menuBackdrop{position:fixed;inset:0;z-index:55;display:grid;place-items:center;padding:18px;
    background:rgba(10,18,26,.46);backdrop-filter:blur(13px);-webkit-backdrop-filter:blur(13px);
    opacity:0;pointer-events:none;transition:opacity .25s}
  #menuBackdrop.on{opacity:1;pointer-events:auto}
  body.mapOpen #menuBackdrop{visibility:hidden;transition:none}
  #menuPanel{scrollbar-width:thin;scrollbar-color:rgba(223,216,188,.42) transparent}
  #menuPanel::-webkit-scrollbar{width:7px}
  #menuPanel::-webkit-scrollbar-track{background:transparent}
  #menuPanel::-webkit-scrollbar-thumb{background:rgba(223,216,188,.42);border-radius:8px}
  #menuPanel{width:min(780px,100%);max-height:min(860px,calc(100dvh - 36px));overflow:auto;
    border:1px solid rgba(255,244,220,.19);border-radius:22px;padding:26px;
    background:linear-gradient(145deg,rgba(31,47,53,.92),rgba(24,34,48,.94));
    box-shadow:0 28px 90px rgba(0,0,0,.34);color:#f6ecd8;
    font-family:ui-sans-serif,-apple-system,BlinkMacSystemFont,"PingFang SC",sans-serif}
  .menuHead{display:flex;align-items:flex-start;justify-content:space-between;gap:18px;margin-bottom:20px}
  .menuHead h2{font:400 28px/1.1 Georgia,"Songti SC",serif;letter-spacing:.06em}
  .menuHead p{margin-top:8px;color:rgba(246,236,216,.58);font-size:13px;letter-spacing:.12em}
  .menuClose{min-width:92px;height:42px;border-radius:999px;border:1px solid rgba(255,244,220,.24);
    background:rgba(255,255,255,.08);color:inherit;font:600 11px/1 inherit;letter-spacing:.12em;cursor:pointer}
  .menuTabs{display:grid;grid-template-columns:repeat(4,1fr);gap:4px;margin:0 0 18px;padding:4px;border:1px solid rgba(240,230,208,.14);border-radius:12px;background:rgba(5,18,25,.16)}
  .menuTabs button{min-height:44px;border:0;border-radius:8px;background:transparent;color:#b8c9c6;font:500 14px/1 ui-sans-serif,sans-serif;letter-spacing:.15em;cursor:pointer;transition:background .15s,color .15s}
  .menuTabs button[aria-selected="true"]{background:#ded3b6;color:#243d3e;box-shadow:0 2px 5px #0002}
  .menuTabs button:hover:not([aria-selected="true"]){background:rgba(255,255,255,.06);color:#f6ecd8}
  :is(button,input,select,summary,a):focus-visible{outline:2px solid #ebd09d;outline-offset:4px}
  [data-menu-panel][hidden]{display:none!important}
  .menuGrid{display:grid;grid-template-columns:1fr;gap:13px}
  .menuBox{border:1px solid rgba(255,244,220,.12);border-radius:15px;padding:15px;background:rgba(255,255,255,.035)}
  .menuBox h3{font-size:12px;letter-spacing:.20em;text-transform:uppercase;color:rgba(246,236,216,.62);margin-bottom:14px}
  .menuRow{display:grid;grid-template-columns:112px 1fr auto;align-items:center;gap:12px;margin:12px 0;font-size:14px}
  .menuRow output{min-width:64px;text-align:right;color:#f4dcae;font-variant-numeric:tabular-nums}
  .menuRow input[type=range]{width:100%;accent-color:#d9bd83}
  .menuRow select{width:100%;min-height:40px;border-radius:10px;border:1px solid rgba(255,244,220,.17);
    background:#283a43;color:#f6ecd8;padding:0 10px;font:14px inherit}
  .backendNote{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:14px;padding-top:12px;
    border-top:1px solid rgba(255,244,220,.10);font-size:10px;letter-spacing:.12em;color:rgba(246,236,216,.52)}
  .backendNote b{font-weight:500;color:#f4dcae;text-align:right;letter-spacing:.04em}
  .menuStats{display:grid;grid-template-columns:repeat(4,1fr);gap:9px}
  .menuStat{padding:11px;border-radius:11px;background:rgba(255,255,255,.045)}
  .menuStat b{display:block;font-size:20px;font-weight:500;color:#f5dda9}.menuStat span{font-size:11px;letter-spacing:.13em;opacity:.58}
  .menuHelp{font-size:13px;line-height:1.9;color:rgba(246,236,216,.72)}.menuHelp b{color:#f5dda9;font-weight:600}
  .menuEvent{margin-top:13px;padding:13px 15px;border-left:2px solid #d9bd83;background:rgba(217,189,131,.07);
    font:12px/1.7 Georgia,"Songti SC",serif;color:rgba(255,245,224,.86)}
  .paperMemory{grid-column:1/-1;padding:0;overflow:hidden}
  .paperMemory summary{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:15px;cursor:pointer;
    color:rgba(246,236,216,.74);font-size:11px;font-weight:650;letter-spacing:.16em;list-style:none}
  .paperMemory summary::-webkit-details-marker{display:none}.paperMemory summary b{color:#f4dcae;font-size:12px}
  .paperMemoryBody{padding:0 15px 15px}.paperMemoryEmpty{padding:14px;border-radius:11px;background:rgba(255,255,255,.035);
    color:rgba(246,236,216,.56);font-size:12px;line-height:1.7}
  #paperMemoryList{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:9px;max-height:250px;overflow:auto}
  .paperMemoryItem{padding:11px 12px;border:1px solid rgba(255,244,220,.10);border-radius:11px;background:rgba(13,23,31,.18)}
  .paperMemoryItem b{display:block;color:#f4dcae;font:600 12px/1.45 Georgia,"Songti SC",serif}
  .paperMemoryItem span{display:block;margin-top:6px;color:rgba(246,236,216,.58);font-size:10px;line-height:1.5}
  .paperMemoryTools{display:flex;justify-content:flex-end;margin-top:10px}.paperMemoryTools button{border:0;background:transparent;
    color:rgba(246,236,216,.56);font:600 10px/1 ui-sans-serif,sans-serif;letter-spacing:.12em;cursor:pointer;padding:7px}
  .menuCredits{grid-column:1/-1;background:linear-gradient(135deg,rgba(217,189,131,.085),rgba(255,255,255,.025));padding:0;overflow:hidden}
  .menuCredits summary{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:15px;cursor:pointer;
    color:rgba(246,236,216,.68);font-size:10px;font-weight:650;letter-spacing:.18em;text-transform:uppercase;list-style:none}
  .menuCredits summary::-webkit-details-marker{display:none}.menuCredits summary span{font-size:9px;opacity:.6}
  .menuCredits[open] summary span{font-size:0}.menuCredits[open] summary span:after{content:'收起';font-size:9px}
  .menuCredits .creditList,.menuCredits .creditNote{margin-left:15px;margin-right:15px}.menuCredits .creditList{margin-bottom:12px}
  .creditList{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}
  .creditItem{min-height:92px;padding:12px 13px;border:1px solid rgba(255,244,220,.10);border-radius:12px;background:rgba(13,23,31,.16)}
  .creditItem b{display:block;color:#f4dcae;font:600 12px/1.3 Georgia,"Songti SC",serif;letter-spacing:.04em}
  .creditItem span{display:block;margin-top:7px;color:rgba(246,236,216,.63);font-size:10px;line-height:1.65}
  .creditItem a{color:#f4dcae;text-decoration:underline;text-decoration-color:rgba(244,220,174,.35);text-underline-offset:3px}
  .creditItem a:focus-visible{outline:2px solid #f4dcae;outline-offset:3px;border-radius:2px}
  .creditNote{margin-top:12px;color:rgba(246,236,216,.48);font-size:10px;line-height:1.7}
  @media(max-width:760px){.menuGrid{grid-template-columns:1fr}.menuCredits,.paperMemory{grid-column:auto}.creditList,#paperMemoryList{grid-template-columns:1fr}}
  body.menuOpen #bookHud,body.menuOpen #menuTouch,
  body.menuOpen #paperPrompt,body.mapOpen #menuTouch,
  body.mapOpen #paperPrompt{pointer-events:none;opacity:0}
  /* Deterministic review captures may remove only interface chrome.  The
     render canvas, post chain and every scene system remain untouched. */
  html.qaCapture #valleyPerf,html.qaCapture #qaVisual,html.qaCapture #menuTouch,
  html.qaCapture #arrivalGuide,html.qaCapture #bookHud,html.qaCapture #regionTag,
  html.qaCapture #paperPrompt,html.qaCapture #toast,html.qaCapture #qaWater,html.qaCapture #qaAtmosphere,html.qaCapture #qaSociety,html.qaCapture #qaAudio,html.qaCapture #qaLifecycle{display:none!important}
  #mapBackdrop{position:fixed;inset:0;z-index:54;display:grid;place-items:center;padding:18px;background:rgba(16,25,31,.52);
    backdrop-filter:blur(13px);opacity:0;pointer-events:none;transition:opacity .28s}
  #mapBackdrop.on{opacity:1;pointer-events:auto}
  #mapPanel{position:relative;width:min(1320px,calc(100vw - 36px));max-height:calc(100dvh - 32px);padding:26px;overflow:auto;border-radius:22px;
    background:linear-gradient(145deg,rgba(235,218,177,.97),rgba(190,174,132,.96));border:1px solid rgba(255,246,218,.58);
    box-shadow:0 28px 100px rgba(0,0,0,.36);color:#3e463f}
  #mapPanel header{display:flex;align-items:center;justify-content:space-between;gap:18px;margin-bottom:16px}
  #mapActions{display:flex;align-items:center;gap:9px;flex-wrap:wrap}
  #mapFilters{display:flex;gap:3px;padding:3px;border:1px solid rgba(55,63,53,.24);border-radius:999px}
  #mapFilters button{min-height:40px;padding:10px 16px;border:0;border-radius:999px;background:transparent;color:inherit;font:600 13px ui-sans-serif,sans-serif;cursor:pointer}
  #mapFilters button[aria-pressed="true"]{background:#40584e;color:#fff3d7}
  #mapLegend{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;margin-top:12px;font:12px/1.5 ui-sans-serif,sans-serif;color:#39483f}
  #mapLayerSummary{font-weight:600}
  #quietStopChoices{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px;margin-top:12px}
  #quietStopChoices .menuAction{min-height:42px;margin:0;padding:10px 12px}
  #quietStopChoices .menuAction:hover{background:rgba(255,255,255,.38)}
  #mapPanel h2{font:400 42px/1 Georgia,"Songti SC",serif;letter-spacing:.10em}#mapPanel p{font:16px/1.55 ui-sans-serif,sans-serif;letter-spacing:.09em;opacity:.70;margin-top:9px}
  #mapClose,.menuAction{border:1px solid rgba(55,63,53,.25);border-radius:999px;background:rgba(255,255,255,.22);color:inherit;
    padding:14px 22px;font:650 14px/1 ui-sans-serif,sans-serif;letter-spacing:.10em;cursor:pointer}
  #worldMap{display:block;width:100%;height:auto;max-height:calc(100dvh - 250px);aspect-ratio:1.55;object-fit:contain;border-radius:14px;
    border:1px solid rgba(70,72,52,.22);background:#b9ad80;touch-action:manipulation}
  @media(max-width:680px){#mapPanel{padding:16px}#mapPanel header{align-items:flex-start;flex-direction:column;gap:12px}#mapPanel h2{font-size:30px}#mapPanel p{font-size:12px}#mapActions{width:100%;justify-content:space-between}#mapClose{padding:12px}#worldMap{max-height:calc(100dvh - 265px)}}
  #toast.on{opacity:.9}
  #err{position:fixed;inset:0;z-index:80;display:none;place-items:center;padding:28px;background:rgba(13,18,26,.96);overflow:auto}
  #err.on{display:grid}.errCard{width:min(650px,100%);padding:30px;border:1px solid rgba(246,236,216,.18);border-radius:22px;
    background:linear-gradient(145deg,#25333c,#19232f);box-shadow:0 26px 90px rgba(0,0,0,.42);color:#f6ecd8}
  .errCard h2{font:400 30px/1.2 Georgia,"Songti SC",serif}.errCard>p{margin-top:12px;color:rgba(246,236,216,.68);line-height:1.75}
  .errActions{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}.errActions button{min-height:43px;border:1px solid rgba(246,236,216,.22);
    border-radius:999px;background:rgba(255,255,255,.08);color:inherit;padding:0 18px;font:600 12px/1 ui-sans-serif,sans-serif;cursor:pointer}
  #err details{margin-top:18px;color:rgba(246,236,216,.50);font:11px/1.65 ui-monospace,Menlo,Consolas,monospace}
  #err pre{margin-top:9px;white-space:pre-wrap;word-break:break-word;max-height:210px;overflow:auto}
  @media(prefers-reduced-motion:reduce){*,*:before,*:after{scroll-behavior:auto!important;animation-duration:.001ms!important;
    animation-iteration-count:1!important;transition-duration:.001ms!important}}
  @media(max-width:560px){
    #menuBackdrop{padding:10px}
    #menuPanel{padding:18px 14px;max-height:calc(100dvh - 20px);border-radius:18px}
    .menuHead h2{font-size:25px}.menuHead p{font-size:10px;letter-spacing:.04em}
    .menuClose{min-width:80px;min-height:44px}
    .menuBox{padding:13px}.menuRow{grid-template-columns:72px minmax(0,1fr) 58px;gap:8px;font-size:13px}
    .menuRow output{min-width:0;font-size:11px}.menuRow:has(select){grid-template-columns:72px minmax(0,1fr)}
    .menuRow:has(select) output{display:none}
    .menuStats{grid-template-columns:repeat(2,1fr)}
    .card{padding:32px 28px 48px}.kanji{font-size:9px;letter-spacing:.12em}
  }

/* A held book composites directly over the living valley, without a scrim. */
#paperBook[hidden]{display:none}
#paperBook{position:fixed;inset:0;z-index:26;overflow:hidden;background:transparent;touch-action:none}
#paperBookStage{position:absolute;inset:30px 12px 36px;transform-origin:50% 50%}
#paperBookStage canvas{display:block;width:100%;height:100%;touch-action:none;outline:none}
#paperBookStatus{position:absolute;left:50%;top:45%;transform:translate(-50%,-50%);padding:7px 12px;border-radius:9px;
  background:rgba(25,38,36,.78);color:#f5f2e7;font:13px/1.5 ui-sans-serif,sans-serif;pointer-events:none}
body.readingBook #menuTouch{z-index:28;opacity:.6}
body.readingBook #arrivalGuide,body.readingBook #paperPrompt,body.readingBook #regionTag,body.readingBook #hint{display:none}
@media(max-width:760px){#paperBookStage{inset:24px 0 48px}#bookHud{left:12px;bottom:calc(12px + env(safe-area-inset-bottom))}}