:root{--bg:#090e10;--panel:#10191c;--line:#293438;--text:#edece4;--muted:#a6b4b7;--gold:#d4b16c;--lime:#d5e991;--cyan:#86c9c7}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font:16px/1.55 Arial,sans-serif}button,input{font:inherit}button,a{touch-action:manipulation}button{cursor:pointer}button:disabled{cursor:default;opacity:.4}button:focus-visible,a:focus-visible,input:focus-visible{outline:3px solid var(--lime);outline-offset:4px}button{border:0;color:inherit}a{color:inherit;text-decoration:none}.topbar{height:88px;padding:0 3.4vw;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line);gap:22px}.brand{display:flex;align-items:center;gap:14px;font-size:17px;letter-spacing:2px;font-weight:700}.brand small{display:block;font:10px/2 Arial;letter-spacing:2px;color:var(--muted)}.brand-mark{font-size:42px;color:var(--gold);font-weight:400}.top-status{font-size:12px;letter-spacing:2px;color:var(--muted);display:flex;align-items:center;gap:10px}.live-dot{width:5px;height:5px;background:var(--lime);box-shadow:0 0 12px var(--lime);border-radius:50%}.top-actions{display:flex;gap:16px;align-items:center}#clock{font:15px monospace;color:var(--gold)}button.outline,.icon-btn{border:1px solid #485151;background:transparent;padding:10px 15px;font-size:14px}.icon-btn{font-size:23px;padding:4px 13px}main{max-width:1720px;margin:auto;padding:0 3.4vw}#chapterNav{display:flex;gap:0;border-bottom:1px solid var(--line);overflow-x:auto;scrollbar-width:thin;padding:0 0 0;min-height:68px}#chapterNav button{flex:1;min-width:104px;background:none;padding:15px 8px;border-bottom:2px solid transparent;font-size:12px;color:var(--muted);text-align:left;white-space:nowrap}#chapterNav button span{display:block;font:11px/1.5 monospace;color:#607175}#chapterNav button.active{color:var(--lime);border-color:var(--lime)}#chapterNav button.done span{color:var(--lime)}#screen{padding-top:24px}.scene{position:relative;aspect-ratio:16/9;isolation:isolate;overflow:hidden;background:#182328}.scene img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;z-index:-3}.scene .shade{position:absolute;inset:0;background:linear-gradient(90deg,rgba(3,10,13,.9) 0%,rgba(3,10,13,.5) 37%,transparent 75%),linear-gradient(0deg,rgba(3,10,13,.7),transparent 32%);pointer-events:none;z-index:-1}.scene-title{position:absolute;left:5%;top:10%;max-width:560px;width:49%}.eyebrow{font:12px/1.6 monospace;letter-spacing:3px;color:var(--gold);text-transform:uppercase}.scene-title h1{font:400 clamp(42px,6.6vw,108px)/.98 Georgia,serif;letter-spacing:-3px;margin:24px 0;color:#f7f1e4}.scene-title h1 em{font-weight:400;color:var(--gold);font-style:normal}.scene-title p{max-width:410px;color:#c3cbca;font-size:clamp(15px,1.2vw,18px);margin:24px 0;line-height:1.65}.primary{background:var(--lime);color:#17211a;padding:15px 25px;font-size:14px;font-weight:700;letter-spacing:.5px;display:inline-flex;align-items:center;justify-content:center;gap:24px;min-height:48px}.primary:hover{background:#e5f8b4}.secondary{background:none;border:1px solid #65726c;padding:13px 20px;color:var(--text);font-size:14px}.scene-corner{position:absolute;bottom:5%;left:5%;right:5%;display:flex;justify-content:space-between;gap:20px;color:#bbc4c0;font:12px/1.6 monospace;letter-spacing:2px}.case-seal{position:absolute;right:4%;top:8%;border:1px solid #a0834c;color:#dfc389;padding:10px 20px;transform:rotate(6deg);letter-spacing:3px;font:12px monospace}.brief-row{display:grid;grid-template-columns:1fr 1fr 1fr;border:1px solid var(--line);border-top:0}.brief-row>div{padding:24px 28px;border-right:1px solid var(--line);display:flex;gap:20px;align-items:flex-start}.brief-row>div:last-child{border:0}.brief-row .big{font:30px Georgia;color:var(--gold)}.brief-row b{display:block;font-size:14px;letter-spacing:1px;margin-bottom:3px}.brief-row p{font-size:14px;color:var(--muted);margin:0}.chapter-heading{display:flex;justify-content:space-between;gap:20px;margin:3px 0 20px;align-items:end}.chapter-heading h1{font:38px/1.2 Georgia;margin:4px 0 0}.chapter-heading p{font-size:14px;color:var(--muted);margin:0}.search-scene{cursor:crosshair;touch-action:none}.search-scene:focus{outline-offset:-3px}.darkness{position:absolute;inset:0;z-index:2;pointer-events:none;background:radial-gradient(circle 145px at var(--x,50%) var(--y,50%),transparent 0%,rgba(2,7,10,.08) 42%,rgba(2,7,10,.63) 75%,rgba(2,7,10,.90) 100%)}.search-scene.inactive .darkness{background:rgba(2,7,10,.70)}.search-scene img{filter:saturate(.86)}.scan-label{position:absolute;left:24px;top:20px;z-index:4;font:12px monospace;letter-spacing:2px;color:#dce5dc;pointer-events:none;text-shadow:0 1px 3px #000}.scene-bottom{position:absolute;bottom:20px;right:24px;left:24px;display:flex;justify-content:space-between;gap:15px;font:12px monospace;color:#ccd4ce;z-index:4;pointer-events:none}.target{position:absolute;z-index:3;transform:translate(-50%,-50%);width:54px;height:54px;border-radius:50%;background:radial-gradient(circle,rgba(228,243,179,.5),rgba(221,236,171,.08) 50%,transparent 73%);box-shadow:0 0 24px #d5e99144;border:1px solid #d5e99155;opacity:0;pointer-events:none;color:#eafabc;transition:opacity .18s,box-shadow .18s;font:15px monospace}.target.near{opacity:1;pointer-events:auto;box-shadow:0 0 34px #d5e99177}.target.found{opacity:1;pointer-events:auto;width:32px;height:32px;background:#162920dd;border:1px solid var(--lime);box-shadow:none}.target:focus-visible{opacity:1;pointer-events:auto}.investigation-bar{background:#111b1e;border:1px solid var(--line);padding:18px 24px;display:flex;justify-content:space-between;gap:20px;align-items:center}.investigation-bar p{margin:0;color:var(--muted);font-size:14px}.investigation-bar b{color:var(--text)}.evidence-tray{display:grid;grid-template-columns:repeat(3,1fr);gap:15px;margin:20px 0}.evidence-card{padding:18px 20px;border:1px solid var(--line);background:#0d1518;text-align:left;min-height:102px;display:flex;align-items:center;gap:16px}.evidence-card .e-number{font:28px Georgia;color:#5e6b6d}.evidence-card small{display:block;color:var(--muted);font-size:12px;letter-spacing:1.5px}.evidence-card strong{display:block;font-size:16px;font-weight:400;margin:5px 0}.evidence-card.found{border-color:#547066;background:#14221f}.evidence-card.found .e-number{color:var(--lime)}.evidence-card.found small{color:var(--cyan)}.solve-panel{display:grid;grid-template-columns:1fr 1.2fr;gap:24px;align-items:center;padding:25px 28px;background:#151c1d;border-left:3px solid var(--gold);margin-bottom:28px}.solve-panel h2{font:23px Georgia;margin:0 0 8px}.solve-panel p{font-size:14px;color:var(--muted);margin:0}.solve-controls{display:flex;gap:8px;flex-wrap:wrap}.solve-controls input{background:#080e10;border:1px solid #596661;color:var(--text);padding:12px 16px;letter-spacing:3px;width:180px;flex:1;min-width:130px;text-transform:uppercase;border-radius:0}.feedback{font-size:14px;margin:10px 0 0;min-height:20px;color:var(--gold)}.hint{background:none;border:0;color:var(--gold);padding:10px 0;text-decoration:underline;text-underline-offset:4px;font-size:14px}.hint:disabled{display:none}.progress{height:3px;background:#293632;margin:0}.progress div{height:100%;background:var(--lime);transition:width .3s}.intro .scene-title h1{font-size:clamp(36px,5vw,78px);line-height:1.05}.intro .scene-title{width:46%;top:9%}.intro .scene-title p{font-size:clamp(14px,1.2vw,18px)}.intro .scene-title blockquote{margin:20px 0;color:var(--gold);font:italic 20px/1.5 Georgia}.finished .scene-title h1{font-size:clamp(48px,7vw,108px)}.final-text{max-width:850px;margin:30px auto;color:#b8c6c6;font-size:18px;line-height:1.8}.final-text h2{font:32px Georgia;color:var(--gold)}.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);border:1px solid var(--line);margin:24px 0}.stats>div{background:var(--panel);padding:24px;text-align:center}.stats b{font:34px Georgia;color:var(--gold);display:block}.stats span{font-size:12px;color:var(--muted)}.badges{display:flex;gap:12px;flex-wrap:wrap;justify-content:center}.badge{border:1px solid #4c6651;padding:8px 12px;font-size:13px;color:var(--lime)}.final-code{display:flex;gap:8px;margin:14px 0 22px}.final-code span{border-bottom:1px solid var(--gold);padding:6px 10px;font:30px Georgia;color:var(--gold)}footer{max-width:1720px;margin:28px auto 0;padding:24px 3.4vw;display:flex;justify-content:space-between;gap:16px;font:11px monospace;letter-spacing:1px;color:#849697;border-top:1px solid var(--line)}footer b{color:var(--gold)}footer button{background:none;padding:0;color:var(--muted);font-size:12px}dialog{color:var(--text);background:#121c20;border:1px solid #5c7169;padding:32px;width:min(670px,92vw);max-height:88vh;box-shadow:0 24px 130px #000}dialog::backdrop{background:#000c;backdrop-filter:blur(5px)}.close{position:absolute;right:12px;top:8px;background:none;font-size:30px;color:var(--muted)}dialog h2{font:32px Georgia;margin:12px 0 20px}dialog p{font-size:17px;color:#c1cccb;line-height:1.75}.keygrid{display:grid;grid-template-columns:repeat(7,1fr);gap:6px}.keygrid>div{border:1px solid #455752;text-align:center;padding:9px;background:#182724}.keygrid b{display:block;font-size:23px;color:var(--lime)}.keygrid span{font:13px monospace;color:var(--muted)}.fragment{background:#e8e3cf;color:#1d2824;padding:24px;font:24px/1.4 monospace;letter-spacing:4px;border-left:4px solid var(--gold);margin:24px 0}.evidence-photo{width:100%;aspect-ratio:16/6;object-fit:cover;display:block;margin:10px 0 20px}.sr-only{position:absolute;width:1px;height:1px;padding:0;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap}#printRoot{display:none}.empty-note{font-size:14px;color:var(--muted)}.footer-actions{display:flex;gap:12px;flex-wrap:wrap}.mobile-help{display:none}
@media(min-width:1650px){.scene-title h1{font-size:108px}}
@media(max-width:1000px){.top-status{display:none}.topbar{height:76px}.scene-title h1{margin:16px 0}.scene-title p{margin:16px 0}.scene-corner{font-size:10px}.brief-row>div{padding:20px 14px;gap:12px}.intro .scene{aspect-ratio:16/10}.intro .scene-title{top:6%;width:55%}.intro .scene-title blockquote{font-size:17px}.solve-panel{grid-template-columns:1fr}.chapter-heading h1{font-size:32px}}
@media(max-width:620px){.topbar{padding:10px 16px;height:auto;flex-wrap:wrap;gap:10px}.brand{font-size:14px}.brand small{font-size:9px}.brand-mark{font-size:32px}.top-actions{gap:9px;margin-left:auto}.top-actions .outline{font-size:12px;padding:8px}#clock{font-size:12px}main{padding:0 14px}#chapterNav{min-height:57px}#chapterNav button{min-width:94px}#screen{padding-top:16px}.cover.scene,.intro .scene,.finished.scene{aspect-ratio:auto;min-height:640px}.cover.scene img,.intro .scene img,.finished.scene img{object-position:62% center}.scene .shade{background:linear-gradient(0deg,#050c0feb,rgba(5,12,15,.5) 70%,rgba(5,12,15,.15))}.scene-title,.intro .scene-title{left:7%;top:24%;width:85%;max-width:none}.scene-title h1{font-size:64px}.scene-title p,.intro .scene-title p{font-size:16px;max-width:none}.scene-corner{left:7%;bottom:5%;font-size:10px}.case-seal{top:7%;right:7%;font-size:11px}.brief-row{grid-template-columns:1fr}.brief-row>div{border-right:0;border-bottom:1px solid var(--line);padding:18px 20px}.chapter-heading{display:block}.chapter-heading p{margin-top:9px}.chapter-heading h1{font-size:29px}.search-scene{aspect-ratio:16/9}.darkness{background:radial-gradient(circle 90px at var(--x,50%) var(--y,50%),transparent 0%,#02070a11 42%,#02070aa1 76%,#02070ae6 100%)}.scan-label{font-size:10px;left:10px;top:10px;letter-spacing:1px}.scene-bottom{font-size:10px;bottom:8px;left:10px;right:10px}.target{width:38px;height:38px}.target.found{width:26px;height:26px}.investigation-bar{padding:15px;align-items:start;flex-wrap:wrap}.investigation-bar p{font-size:13px}.mobile-help{display:inline}.evidence-tray{gap:7px;margin:12px 0}.evidence-card{padding:12px 8px;display:block;min-height:120px}.evidence-card .e-number{font-size:22px}.evidence-card strong{font-size:13px}.evidence-card small{font-size:10px;letter-spacing:.5px}.solve-panel{padding:18px 16px;gap:16px}.solve-controls .primary{padding:12px 16px}.solve-controls input{width:130px}.intro .scene-title{top:17%}.stats{grid-template-columns:repeat(2,1fr)}.final-text{font-size:16px;margin:25px 10px}.final-code{gap:3px}.final-code span{font-size:25px;padding:5px 8px}footer{flex-wrap:wrap;font-size:10px;padding:20px 16px}.keygrid{grid-template-columns:repeat(6,1fr)}dialog{padding:28px 22px}.fragment{font-size:20px;letter-spacing:2px}.evidence-photo{aspect-ratio:16/9}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}
@media print{@page{size:A4;margin:14mm}body{background:white;color:#151515}body>header,body>main,body>footer,dialog,#announcer{display:none!important}#printRoot{display:block;font:12pt/1.5 Georgia;color:#111}.print-page{break-after:page}.print-page:last-child{break-after:auto}.print-page h1{font-size:26pt;line-height:1.1}.print-page h2{font-size:17pt}.print-page img{width:100%;aspect-ratio:16/9;object-fit:cover}.print-page .print-evidence{margin:12px 0;padding:8px 0;border-bottom:1px solid #999;break-inside:avoid}.print-page .print-frag{font:12pt monospace;margin-top:6px}.print-key{display:grid;grid-template-columns:repeat(10,1fr);gap:5px}.print-key div{border:1px solid #888;padding:4px;text-align:center;font-size:11pt}.print-caption{font-size:11pt;color:#333}.write-line{height:28px;border-bottom:1px solid #777}}
/* Keep essential controls readable at all widths. */
#chapterNav button{font-size:14px}.brand small{font-size:11px}.top-status{font-size:12px}.evidence-card small{font-size:12px}.scan-label,.scene-bottom{font-size:12px}.scene-corner{font-size:12px}.case-result{font:12px monospace;letter-spacing:2px;color:var(--lime)}
@media(max-width:620px){.brand small{font-size:10px}.scan-label{font-size:10px}.scene-bottom{font-size:10px}.scene-corner{font-size:10px}.evidence-card small{font-size:11px}.evidence-card strong{font-size:14px}.cover.scene{min-height:660px}.intro .scene{min-height:720px}.scene.intro{min-height:610px;aspect-ratio:auto}.scene.intro .scene-title{top:12%}}

/* Scene image stays above the stage background in every browser. */
.search-scene img{z-index:0;pointer-events:none;filter:saturate(.95)}
.search-scene .darkness{background:radial-gradient(circle 190px at var(--x,50%) var(--y,50%),transparent 0%,transparent 48%,rgba(2,7,10,.40) 76%,rgba(2,7,10,.82) 100%)}
.search-scene.inactive .darkness{background:rgba(2,7,10,.55)}
.exhibition-scene img{filter:brightness(1.3) saturate(.95)}
.solve-step label{display:block;font-size:16px;margin:0 0 9px;color:var(--gold)}
.solve-step+.solve-step{margin-top:22px}.solve-step.approved label{color:var(--lime)}
#sequenceInput{width:100%;flex-basis:100%;letter-spacing:1px;text-transform:none;font-size:16px}
#sequenceInput:disabled{opacity:.85}.word-locked{padding-top:15px;color:var(--muted)}
@media(max-width:620px){.search-scene .darkness{background:radial-gradient(circle 115px at var(--x,50%) var(--y,50%),transparent 0%,transparent 48%,rgba(2,7,10,.40) 76%,rgba(2,7,10,.82) 100%)}.search-scene.inactive .darkness{background:rgba(2,7,10,.55)}}