:root{--ink:#e6e7d7;--acid:#d6e595;--muted:#929b88;--amber:#e4b16a;--red:#e36b4c;--bg:#10120f;--mono:'SFMono-Regular','Menlo','Consolas',monospace;--sans:'Avenir Next','PingFang SC','Helvetica Neue',sans-serif}*{box-sizing:border-box}html,body{margin:0;width:100%;height:100%;overflow:hidden;background:var(--bg);color:var(--ink);font-family:var(--sans);font-size:13px}button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}button:hover:not(:disabled){color:var(--acid)}button:disabled{opacity:.3;cursor:default}button:focus-visible,a:focus-visible,canvas:focus-visible{outline:2px solid var(--acid);outline-offset:5px}kbd{display:inline-flex;align-items:center;justify-content:center;min-width:23px;height:24px;border:1px solid #6b745f66;font:10px var(--mono);padding:0 6px;border-radius:2px;color:#d1d6be;background:#18201580}.game-shell{position:relative;width:100%;height:100%;min-width:1000px;min-height:640px;isolation:isolate}#scene{display:block;width:100%;height:100%;outline:none}.grain,.vignette{position:absolute;inset:0;pointer-events:none}.grain{opacity:.055;background:repeating-linear-gradient(0deg,#000 0,#000 1px,transparent 1px,transparent 4px);z-index:1}.vignette{box-shadow:inset 0 0 180px 55px #040603c2;z-index:1}.hud-top{position:absolute;top:0;left:0;right:0;z-index:4;display:flex;align-items:center;justify-content:space-between;padding:26px 34px;background:linear-gradient(#0d100ee8,transparent);height:105px;gap:28px}.brand{display:flex;gap:11px;align-items:center;font:600 15px var(--mono);letter-spacing:-.6px;white-space:nowrap}.brand-mark{font-size:29px;color:var(--acid);font-weight:400;letter-spacing:-10px;width:31px;transform:rotate(180deg)}.brand small{display:block;font:8px var(--mono);letter-spacing:1px;color:var(--muted);margin-top:6px}.chapter{font:9px var(--mono);letter-spacing:1.7px;color:#b3bea7;display:flex;align-items:center;gap:10px}.led{width:5px;height:5px;border-radius:50%;background:var(--acid);box-shadow:0 0 8px #d6e59580}.hud-top nav{display:flex;align-items:center;gap:24px}.hud-top nav button{font:10px var(--sans);padding:8px 0}#pauseButton{font-size:17px;width:30px;border:1px solid #52604766}.run-hud{position:absolute;left:36px;top:150px;width:186px;z-index:3;transition:opacity .4s}.hud-label{font:8px var(--mono);letter-spacing:1.3px;color:var(--muted)}.distance{font:56px/1.2 var(--mono);letter-spacing:-4px;margin-top:9px}.distance small{font-size:15px;letter-spacing:0;margin-left:7px;color:var(--acid)}.route-bar{height:3px;background:#6c775338;margin-top:16px;position:relative}.route-bar i{display:block;background:var(--acid);height:100%;width:0;box-shadow:0 0 9px #d6e59540}.route-bar b{position:absolute;height:7px;width:1px;background:#9ca78c66;top:-2px;left:33%}.route-bar b:last-child{left:66%}.route-ends{display:flex;justify-content:space-between;font:7px var(--mono);letter-spacing:1px;color:#69745e;margin-top:9px}.health-block{margin-top:42px}.health{display:flex;gap:6px;margin-top:12px}.health i{display:block;width:28px;height:8px;background:var(--acid);transform:skewX(-18deg);box-shadow:0 0 13px #c7db8226}.health i.empty{background:#3e4538;box-shadow:none}.mode-switch{margin-top:45px;border-top:1px solid #626d453d;padding-top:12px;display:flex;flex-direction:column;align-items:flex-start;gap:7px}.mode-switch button{font-size:10px;color:#7b8670;padding:5px 0;display:flex;gap:10px;align-items:center}.mode-switch kbd{height:20px;min-width:20px;font-size:8px}.mode-switch button[aria-pressed=true]{color:var(--acid)}.mode-switch button[aria-pressed=true] kbd{border-color:#a5b77777;color:var(--acid)}.sensor-hud{position:absolute;right:36px;top:160px;width:170px;z-index:3}.sensor-display{height:110px;position:relative;margin:15px 0 6px;overflow:hidden;border-bottom:1px solid #73845c33}.sensor-arc{position:absolute;top:4px;width:150px;height:150px;left:10px;border:1px solid #65734b40;border-radius:50%;box-shadow:inset 0 0 0 24px #11170c26,inset 0 0 0 25px #687b4526}.sensor-arc:before,.sensor-arc:after{content:'';position:absolute;background:#65734b40;width:1px;height:90px;top:20px;left:74px;transform:rotate(35deg);transform-origin:bottom}.sensor-arc:after{transform:rotate(-35deg)}.sensor-bars{position:absolute;inset:45px 32px 0;display:flex;align-items:flex-end;justify-content:space-between;gap:8px;padding-bottom:14px}.sensor-bars i{width:10px;height:7px;background:#69764a66;border:1px solid #83935d33;transition:height .2s,background .2s}.sensor-bars i:nth-child(2),.sensor-bars i:nth-child(4){height:11px}.sensor-bars i:nth-child(3){height:15px}.sensor-bars i.warn{background:var(--amber);height:27px;box-shadow:0 0 14px #e4b16a55}.sensor-bars i.danger{background:var(--red);height:39px;box-shadow:0 0 14px #e36b4c66}.sensor-hud>strong{font-size:11px;font-weight:400;color:var(--acid)}.sensor-hud>p{font-size:10px;line-height:1.8;color:var(--muted)}.tile-key{display:flex;gap:13px;align-items:center;margin-top:35px;border-top:1px solid #626d453d;padding-top:20px}.example-number{font:30px var(--mono);color:var(--amber)}.tile-key p{font-size:9px;line-height:1.7;color:#a8b29d}.tile-key small{font-size:8px;color:#6b765f}.game-footer{position:absolute;bottom:0;left:0;right:0;padding:24px 35px 27px;display:flex;align-items:flex-end;justify-content:space-between;z-index:4;background:linear-gradient(transparent,#0d100ef0);gap:20px}.key-help{display:grid;grid-template-columns:auto auto;gap:10px 18px;min-width:260px}.key-help>span{font-size:9px;color:#9aa68b;white-space:nowrap}.key-help kbd{height:20px;min-width:20px;font-size:8px;margin-right:3px}.probe-control{position:absolute;left:50%;transform:translateX(-50%);bottom:28px;width:244px}.probe-control>button{display:flex;align-items:center;justify-content:space-between;width:100%;padding:11px 13px;background:#1d2518e6;border:1px solid #81945b88;font-size:11px;color:var(--acid)}.probe-control>button kbd{font-size:8px;border-color:#8a9d5b77;min-width:51px;height:22px;color:var(--acid)}.probe-control>button>span:last-child{font:24px var(--mono);line-height:1}.charge-row{display:flex;gap:4px;margin-top:5px}.charge-row i{height:3px;background:var(--acid);flex:1;transition:background .2s}.charge-row i.empty{background:#475135}.footer-note{text-align:right;font:8px/1.9 var(--mono);letter-spacing:.7px;color:#7b876b}.footer-note span{font:8px var(--sans);letter-spacing:.6px;color:#58654c}.toast{position:absolute;left:50%;top:112px;transform:translateX(-50%);font-size:12px;letter-spacing:1px;z-index:5;color:var(--acid);padding:10px 20px;background:#12190fd9;border-left:2px solid var(--acid);opacity:0;transition:opacity .2s;pointer-events:none;white-space:nowrap}.toast.show{opacity:1}.toast.danger{color:var(--red);border-color:var(--red)}.hit-flash{position:absolute;inset:0;pointer-events:none;z-index:3;box-shadow:inset 0 0 160px #a73726;opacity:0;transition:opacity .3s}.hit-flash.on{opacity:.9;transition:none}
.intro-overlay{position:absolute;inset:0;z-index:6;background:linear-gradient(90deg,#0b0e0bf5 0%,#0b0e0be6 27%,#0b0e0b55 52%,transparent 72%);display:flex;align-items:center;padding:95px 8% 80px;transition:opacity .4s}.intro-overlay[hidden]{display:none}.intro-content{width:420px}.intro-index{display:flex;justify-content:space-between;max-width:360px;font:8px var(--mono);letter-spacing:1.4px;color:#9aa889;margin-bottom:30px}.intro-index span:last-child{color:#69765e}h1{font-family:Impact,'Arial Narrow',var(--sans);font-weight:400;font-size:clamp(58px,5.8vw,88px);line-height:.95;letter-spacing:-1px;margin:0;max-width:490px}h1 em{font-style:normal;color:var(--acid)}.title-dot{color:var(--acid)}.intro-content h2{font-family:'Songti SC',Georgia,serif;font-size:29px;letter-spacing:10px;font-weight:400;color:var(--acid);margin:24px 0 14px}.intro-content>p{font-size:12px;line-height:1.9;color:#b4bbaa}.intro-controls{display:flex;flex-wrap:wrap;gap:14px;font-size:9px;color:var(--muted);margin:25px 0}.intro-controls kbd{height:21px;font-size:8px;min-width:19px;margin-right:2px}.start-button{display:flex;justify-content:space-between;align-items:center;gap:30px;background:var(--acid);color:#1a210f;min-height:51px;padding:16px 20px;width:100%;font-size:13px;font-weight:600;transition:background .2s}.start-button>span:last-child{font:10px var(--mono);letter-spacing:1px}.start-button:hover:not(:disabled){background:#e9f0c3;color:#151b0b}.intro-small{font-size:9px!important;color:#6b795f!important;margin-top:12px}.intro-side{position:absolute;right:8%;bottom:180px;display:flex;align-items:flex-end;flex-direction:column;color:#b6c1a1;font:9px var(--mono);letter-spacing:1.7px}.specimen-line{height:90px;width:1px;background:#a6b58266;margin-bottom:20px}.intro-side small{font:11px var(--sans);letter-spacing:3px;color:var(--acid);margin-top:12px}.game-shell.is-intro .run-hud,.game-shell.is-intro .sensor-hud,.game-shell.is-intro .game-footer,.game-shell.is-intro .chapter{opacity:0;pointer-events:none}.game-shell.is-intro .hud-top{z-index:7}.center-overlay{position:absolute;inset:0;z-index:8;background:#080c08c9;backdrop-filter:blur(7px);display:flex;align-items:center;justify-content:center}.center-overlay[hidden]{display:none}.pause-panel,.end-panel{background:#141a12f2;border:1px solid #74855855;padding:40px;width:540px;box-shadow:0 40px 160px #0009}.pause-panel h2,.end-panel h2{font:400 35px 'Songti SC',Georgia,serif;letter-spacing:1px;margin:24px 0 14px}.pause-panel p,.end-panel>p{color:#a5b195;font-size:12px;line-height:1.8}.pause-panel .start-button{margin-top:30px}.text-button{font-size:10px;color:#a1af8e;padding:12px 0}.pause-panel>.text-button{display:block;margin:8px auto 0}.end-stats{display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid #4c5b3b;border-bottom:1px solid #4c5b3b;margin:26px 0;padding:22px 0;gap:14px}.end-stats strong{font:28px var(--mono);color:var(--acid);display:block}.end-stats span{font-size:9px;color:var(--muted);display:block;margin-top:8px}.end-question{font:18px/1.7 'Songti SC',Georgia,serif!important;color:var(--ink)!important}.end-actions{display:flex;gap:20px;align-items:center;margin:22px 0 7px}.end-actions .start-button{flex:1}.end-actions .text-button{white-space:nowrap}.loading{position:absolute;inset:0;z-index:20;background:#10120f;display:flex;align-items:center;justify-content:center;font:12px var(--mono);letter-spacing:3px}.loading[hidden]{display:none}.webgl-error{position:absolute;inset:0;z-index:30;background:#10120f;padding:15%;text-align:center}.webgl-error[hidden]{display:none}dialog{background:#141a12;border:1px solid #617346;color:var(--ink);padding:30px 38px;max-width:650px;width:90%;max-height:85vh;overflow-y:auto}dialog::backdrop{background:#000c;backdrop-filter:blur(5px)}.dialog-head{display:flex;justify-content:space-between;align-items:center;font:9px var(--mono);letter-spacing:1px;color:var(--muted);border-bottom:1px solid #53623d66;padding-bottom:18px}.dialog-head button{font-size:25px;padding:0 4px}dialog h2{font:400 33px/1.4 'Songti SC',Georgia,serif;margin:25px 0 18px}dialog p{font-size:12px;line-height:1.9;color:#acb99c}dialog article{border-top:1px solid #53623d66;padding:23px 0}dialog article small{font:8px var(--mono);letter-spacing:1px;color:var(--acid)}dialog h3{font-size:15px;font-weight:400}dialog a{font-size:10px;color:var(--acid);text-underline-offset:5px}.research-coda{font-size:10px!important;color:#738360!important;border-top:1px solid #53623d66;padding-top:18px}@media(max-height:760px){.intro-overlay{padding-top:95px;padding-bottom:40px}h1{font-size:61px}.intro-index{margin-bottom:20px}.intro-content h2{margin:17px 0 10px;font-size:25px}.intro-controls{margin:18px 0}.run-hud{top:125px}.sensor-hud{top:135px}.health-block{margin-top:25px}.mode-switch{margin-top:25px}}@media(prefers-reduced-motion:reduce){*{transition:none!important}.grain{display:none}}
/* Minimal English-only game HUD. */
.sensor-hud .sensor-bars{position:static;inset:auto;height:48px;padding:0 0 14px;margin-bottom:12px;border-bottom:1px solid #73845c44;justify-content:flex-start;gap:11px}
.probe-control>button>span:last-child{font:11px var(--sans);line-height:1.4}
.intro-content{width:360px}.intro-content h1{font-size:82px;line-height:.98;margin-bottom:24px}.intro-content>p{font-size:12px}.intro-controls{margin:24px 0}.sensor-hud>strong{font-size:12px}
.end-panel h2,.pause-panel h2,dialog h2{font-family:var(--sans);font-weight:500;letter-spacing:-1px}
.intro-overlay{background:linear-gradient(90deg,#0b0e0bf0 0%,#0b0e0bc0 25%,#0b0e0b25 50%,transparent 70%)}
.brand{letter-spacing:.5px}dialog details{margin-top:25px;border-top:1px solid #53623d66;padding-top:20px}dialog summary{cursor:pointer;font-size:11px;color:var(--muted)}
@media(max-height:760px){.intro-content h1{font-size:67px}}