:root,:host{color-scheme:dark;--bg:#101c2b;--panel:#172638;--line:#2b3c4e;--text:#eaf0f5;--muted:#a0afbd;--cyan:#75dcde;--orange:#f3b776;--navy:#0a2a4a;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;font-synthesis:none;color:var(--text);background:var(--bg)}*{box-sizing:border-box}body{margin:0}button,input,select{font:inherit}button,a,input,select{touch-action:manipulation}button{cursor:pointer}button:disabled{opacity:.45;cursor:default}button:focus-visible,a:focus-visible,select:focus-visible,input:focus-visible{outline:3px solid var(--cyan);outline-offset:4px}a{color:inherit}button,select{color:inherit}button{transition:background .15s,border-color .15s}select{background:var(--panel);border:1px solid var(--line);padding:9px 28px 9px 11px;border-radius:6px;font-size:14px}.masthead{height:76px;border-bottom:1px solid var(--line);display:flex;align-items:center;gap:22px;padding:0 4%}.masthead img{display:block}.masthead-divider{height:22px;width:1px;background:var(--line)}.lab-wordmark{letter-spacing:1.6px;font-size:11px;color:var(--muted)}.article-link{margin-left:auto;text-decoration:none;color:var(--muted);font-size:14px}.article-link span{margin-left:10px;color:var(--cyan)}main{max-width:1520px;margin:auto;padding:0 4%}.intro{display:flex;justify-content:space-between;align-items:center;gap:24px;padding:36px 0 30px}.eyebrow{display:flex;align-items:center;gap:9px;letter-spacing:1.8px;font-size:11px;font-weight:700;color:var(--cyan)}.cyan-line{height:2px;width:22px;background:var(--cyan)}.muted{color:var(--muted);margin-left:5px}h1{font-size:clamp(30px,3vw,43px);line-height:1.13;letter-spacing:-1.6px;font-weight:600;margin:13px 0 12px}h1 span{color:var(--muted)}.intro p{font-size:15px;margin:0;color:var(--muted);line-height:1.6}.button{display:inline-flex;align-items:center;justify-content:center;gap:12px;border:1px solid transparent;border-radius:6px;min-height:42px;padding:10px 16px;font-size:14px;font-weight:550;white-space:nowrap}.primary{background:var(--cyan);color:#10252d}.primary:hover{background:#9cebef}.secondary{background:#24364a;border-color:#3a4c60;color:#f1f5f9}.secondary:hover{background:#30465d}.subtle{background:transparent;color:var(--muted)}.subtle:hover{color:var(--text);background:#223246}.icon-button{background:transparent;border:1px solid var(--line);border-radius:6px;min-width:38px;height:38px;font-size:23px;color:var(--muted);display:grid;place-items:center}.icon-button:hover{color:white;border-color:#65778c}.lab{border:1px solid var(--line);border-radius:12px;overflow:hidden;background:var(--panel)}.lab-bar{display:flex;align-items:center;gap:16px;min-height:65px;padding:12px 22px;border-bottom:1px solid var(--line)}.lab-title{display:flex;gap:12px;align-items:center;font-size:14px}.room-icon{font-size:23px;color:var(--cyan)}.pill{border:1px solid #3a4a5c;color:var(--muted);border-radius:4px;padding:3px 7px;font-size:11px;letter-spacing:.4px}.scenario-label{display:flex;gap:12px;align-items:center;margin-left:auto;color:var(--muted);font-size:13px}.lab-grid{display:grid;grid-template-columns:minmax(0,1fr) 310px}.simulation{min-width:0}.scene{height:486px;position:relative;overflow:hidden;background:#e6edf0;color:#294451;isolation:isolate}.room-canvas{position:absolute;inset:0}.room-canvas canvas{display:block;width:100%;height:100%;touch-action:pan-y}.scene-toolbar{position:absolute;z-index:4;left:20px;right:20px;top:19px;display:flex;align-items:center;justify-content:space-between;gap:10px;pointer-events:none}.scene-toolbar>*{pointer-events:auto}.view-switch{background:#ffffffa8;border:1px solid #ced8df;box-shadow:0 2px 6px #33424d08;border-radius:6px;padding:3px;display:flex}.view-switch button{border:0;background:none;color:#6a7c87;border-radius:4px;padding:7px 10px;font-size:12px}.view-switch button[aria-pressed=true]{background:white;color:#19394e;box-shadow:0 1px 4px #243a5117}.overlay-label{display:flex;gap:6px;align-items:center;font-size:12px;color:#526977}.overlay-label select{color:#2d4656;background:#ffffffb8;border-color:#ced8df;padding:7px 21px 7px 8px;font-size:12px;max-width:155px;color-scheme:light}.room-labels{position:absolute;inset:0;pointer-events:none;z-index:2}.tile-label{position:absolute;transform:translate(-50%,-50%);pointer-events:auto;display:flex;align-items:center;justify-content:center;flex-direction:column;gap:1px;min-width:48px;min-height:44px;background:none;border:0;color:#284455;text-shadow:0 1px 1px #ffffff70;border-radius:5px;line-height:1.1;padding:1px;font-variant-numeric:tabular-nums}.tile-label .tile-arrow{font-size:20px;line-height:1;font-weight:650}.tile-label .tile-value{font-size:11px;font-weight:600;letter-spacing:.2px}.tile-label .tile-coordinate{font-size:10px;opacity:0;position:absolute;top:-11px;background:#18374c;color:white;padding:3px 5px;border-radius:3px;text-shadow:none;white-space:nowrap}.tile-label:hover .tile-coordinate,.tile-label:focus-visible .tile-coordinate,.tile-label[aria-pressed=true] .tile-coordinate{opacity:1}.tile-label.terminal-label{background:#effcffd9;min-height:28px;min-width:46px;box-shadow:0 2px 8px #25354f16;font-weight:700;font-size:12px;border:1px solid #bad8df}.tile-label.pit-label{color:#8e463d;background:#fff1e8ed;border-color:#e1b7a9}.room-labels[data-overlay=none] .tile-label:not(.terminal-label){color:transparent;text-shadow:none}.room-labels[data-overlay=none] .tile-coordinate{color:white}.room-labels[data-overlay=values] .tile-arrow{display:none}.room-caption{position:absolute;z-index:3;bottom:48px;left:0;width:100%;display:flex;justify-content:center;gap:19px;font-size:11px;pointer-events:none}.room-caption>span{display:flex;align-items:center;gap:5px}.room-caption b{font-weight:500}.legend-dot{height:7px;width:7px;display:inline-block;border-radius:2px}.agent-dot{background:#d89645}.goal-dot{background:#369ca5}.pit-dot{background:#b9604d}.obstacle-dot{background:#687e8a}.room-instruction{position:absolute;bottom:18px;width:100%;text-align:center;color:#5f7480;font-size:11px;pointer-events:none}.room-instruction span{margin-right:6px}.fallback{position:absolute;z-index:1;inset:80px 20px 92px;display:flex;flex-direction:column;align-items:center}.fallback p{font-size:13px;text-align:center;margin:0 0 12px}.fallback-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;max-width:420px;width:100%;height:100%}.fallback-grid button,.fallback-grid .blocked{border:1px solid #b8cbd6;border-radius:5px;display:grid;place-content:center;background:#f3f7f9;color:#1a465b;font-size:14px}.fallback-grid button[aria-pressed=true]{outline:3px solid #259ca5;outline-offset:0}.fallback-grid .blocked{background:#6d838f;color:white}.scene-ready .fallback{display:none}.scene-error .view-switch{display:none}.simulation-bottom{padding:18px 22px;border-top:1px solid var(--line)}.agent-line{display:flex;justify-content:space-between;align-items:center;gap:12px}.section-label{font-size:10px;letter-spacing:1.5px;color:var(--muted);font-weight:600}.agent-line p{font-size:12px;line-height:1.6;margin:5px 0;color:var(--muted)}.agent-buttons{display:flex;gap:8px}.agent-button{background:#f3b776;color:#332819;font-size:13px;min-height:38px;padding:8px 13px}.agent-button:hover{background:#ffcc92}.journey-metrics{display:flex;gap:25px;border-top:1px solid var(--line);margin-top:12px;padding-top:12px;color:var(--muted);font-size:11px}.journey-metrics b{font-family:ui-monospace,SFMono-Regular,monospace;font-size:12px;color:var(--text);font-weight:500;margin-left:7px}.inspector{padding:23px 22px;border-left:1px solid var(--line);background:#19293c;min-width:0}.inspector-heading{display:flex;justify-content:space-between;gap:8px;align-items:center}.inspector h2{font-size:17px;line-height:1.3;letter-spacing:-.4px;font-weight:550;margin:8px 0 0}.state-chip{font:12px ui-monospace,monospace;color:var(--cyan);background:#253f4e;border:1px solid #385666;border-radius:5px;padding:8px}.inspector-hint{font-size:12px;line-height:1.6;color:var(--muted);margin:15px 0 18px}.actions{display:grid;grid-template-columns:repeat(4,1fr);gap:7px;margin-bottom:22px}.action{border:1px solid #3b4c60;border-radius:6px;background:transparent;padding:10px 2px;color:var(--muted);font-size:11px}.action span{display:block;font-size:23px;line-height:1.3;color:#dfeaf1;margin-bottom:3px}.action.active{border-color:var(--cyan);background:#24434f;color:var(--cyan)}.action.active span{color:var(--cyan)}.small-heading{display:flex;justify-content:space-between;gap:8px;font-size:11px;color:var(--muted)}.small-heading span:last-child{color:#7f94a7}.transitions{margin:14px 0 23px;min-height:77px}.transition-row{display:grid;grid-template-columns:50px 1fr 35px;gap:9px;align-items:center;font-size:12px;margin:12px 0;font-variant-numeric:tabular-nums}.prob-track{height:5px;background:#2c3e52;overflow:hidden;border-radius:10px}.prob-fill{height:100%;background:#7ac2c9;border-radius:10px}.prob{color:var(--cyan);text-align:right;font-size:11px}.action-values{border-top:1px solid var(--line);padding-top:18px}.q-row{display:flex;align-items:center;justify-content:space-between;gap:8px;font-size:12px;padding:9px 10px;border-radius:4px;margin-top:4px;color:var(--muted)}.q-row .q-number{font-family:ui-monospace,monospace;font-size:12px}.q-row.best{background:#244350;color:#a1e3e3}.q-row .best-tag{font-size:9px;letter-spacing:.6px;padding:2px 4px;border:1px solid #44666f;border-radius:3px;margin-left:6px}.best-choice{margin-top:19px;padding:15px 0 0;border-top:1px solid var(--line);display:grid;grid-template-columns:1fr auto;gap:8px;align-items:center}.best-choice>span{font-size:10px;letter-spacing:1px;color:var(--muted)}.best-choice strong{color:var(--cyan);font-size:18px;font-weight:500}.best-choice small{font-size:11px;color:var(--muted);grid-column:1/-1}.learning-bar{display:flex;justify-content:space-between;align-items:center;gap:20px;border-top:1px solid var(--line);padding:17px 22px;background:#142235}.learning-controls{display:flex;gap:8px;align-items:center}.learning-stats{display:flex;gap:22px;align-items:center}.learning-stats>div{display:flex;flex-direction:column;gap:5px}.learning-stats span:not(.status){font-size:9px;letter-spacing:1px;color:var(--muted)}.learning-stats strong{font:17px ui-monospace,monospace}.status{font-size:11px;color:var(--cyan);border:1px solid #3b555f;background:#243f47;padding:5px 8px;border-radius:4px;white-space:nowrap}.lower-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-top:22px}.panel{border:1px solid var(--line);background:#152334;border-radius:10px;padding:24px}.panel-heading{display:flex;justify-content:space-between;align-items:center;gap:14px}.panel h2{font-size:19px;font-weight:500;letter-spacing:-.3px;margin:8px 0 0}.panel-glyph{font-size:27px;color:#758a9d}.parameter-grid{display:grid;grid-template-columns:1fr 1fr;gap:28px 30px;margin-top:27px}.parameter-grid label{font-size:13px;color:#dce7ef}.parameter-grid output{float:right;font-family:ui-monospace,monospace;font-size:13px;color:var(--cyan)}input[type=range]{appearance:none;width:100%;height:4px;background:#34465a;border-radius:4px;display:block;margin:20px 0 13px;cursor:pointer}input[type=range]::-webkit-slider-thumb{appearance:none;width:13px;height:13px;border-radius:50%;background:var(--cyan);border:3px solid #142537;box-shadow:0 0 0 2px var(--cyan)}input[type=range]::-moz-range-thumb{width:10px;height:10px;background:var(--cyan);border:2px solid #142537;border-radius:50%}.parameter-grid small{font-size:11px;color:var(--muted)}.parameter-note{font-size:12px;line-height:1.7;color:var(--muted);border-top:1px solid var(--line);padding-top:20px;margin:24px 0 0}.equation{font:19px/1.9 Georgia,serif;margin:22px 0 6px;white-space:normal}.equation sub{font-size:11px}.probability{color:var(--cyan)}.reward{color:var(--orange)}.future{color:#afc0ed}.equation-key{display:flex;gap:19px;font-size:10px;letter-spacing:.3px}.calculation{font-size:12px;font-family:ui-monospace,SFMono-Regular,monospace;color:var(--muted);line-height:1.7;margin-top:18px}.calc-title{font-family:Inter,system-ui,sans-serif;font-size:11px;margin-bottom:8px;color:var(--muted)}.calc-row{display:flex;justify-content:space-between;gap:10px;padding:4px 0}.calc-row .term{white-space:nowrap}.calc-row .result{color:#dfeaf1}.calc-result{padding-top:8px;color:#e1eaf1}.backup{border-top:1px solid var(--line);padding-top:13px;margin-top:14px;display:flex;justify-content:space-between;align-items:center;font:15px Georgia,serif;gap:10px}.backup strong{color:var(--cyan);font:19px ui-monospace,monospace}.math{font-family:Georgia,serif;font-style:italic}.insight{display:flex;gap:16px;align-items:center;padding:22px 4px 32px;color:var(--muted)}.insight>span{font-size:27px;color:var(--cyan)}.insight p{font-size:13px;line-height:1.75;margin:0}.insight b{color:var(--text);font-weight:500}.concepts{border-top:1px solid var(--line);padding:32px 0 38px;display:grid;grid-template-columns:1.2fr 1fr 1fr 1fr;gap:30px}.concepts h2{font-size:24px;line-height:1.3;font-weight:500;letter-spacing:-.6px;margin-top:12px}.concepts article>span{font:21px Georgia,serif;color:var(--cyan)}.concepts h3{font-size:14px;font-weight:500;margin:12px 0}.concepts p{font-size:12px;color:var(--muted);line-height:1.8;margin:0}footer{border-top:1px solid var(--line);padding:24px 0 32px;display:flex;align-items:center;justify-content:space-between;gap:20px;color:#8598aa;font-size:11px;line-height:1.8}footer div{display:flex;gap:22px}footer a{text-decoration:none}footer a:hover{color:var(--cyan)}footer b{font-weight:500;color:var(--muted)}dialog{border:1px solid #486172;background:#1a2a3c;color:var(--text);border-radius:12px;max-width:460px;width:calc(100% - 36px);padding:32px;box-shadow:0 20px 70px #0005}dialog::backdrop{background:#09111bbe;backdrop-filter:blur(4px)}dialog h2{font-size:26px;font-weight:500;letter-spacing:-.6px}dialog p{font-size:15px;line-height:1.8;color:var(--muted);margin-bottom:25px}.close{position:absolute;right:14px;top:8px;font-size:25px;background:none;border:0;color:var(--muted)}.terminal-note{font-size:12px;line-height:1.7;color:var(--muted)}@media(min-width:1400px){.scene{height:515px}.lab-grid{grid-template-columns:minmax(0,1fr) 330px}.inspector{padding:25px}.transitions{margin-bottom:30px}.q-row{padding:10px}}@media(max-width:1100px){main{padding:0 3%}.lab-grid{grid-template-columns:minmax(0,1fr) 285px}.inspector{padding:20px 18px}.scene{height:460px}.learning-stats{gap:16px}.learning-bar{padding:16px}.learning-controls .button{padding:9px 12px;font-size:12px}.learning-stats strong{font-size:15px}.status{display:none}.agent-line{align-items:flex-start;flex-direction:column}.agent-buttons{width:100%;justify-content:flex-end;margin-top:-2px}.journey-metrics{gap:14px;font-size:10px}.journey-metrics b{margin-left:4px;font-size:11px}.panel{padding:20px}.parameter-grid{gap:25px 20px}.equation{font-size:17px}.concepts{gap:20px}.scene-toolbar{left:14px;right:14px}.overlay-label{font-size:0}.room-caption{gap:11px;font-size:10px}}@media(max-width:800px){.masthead{height:65px;padding:0 4%}.masthead-divider,.lab-wordmark{display:none}.intro{padding:26px 0;gap:12px}.intro p{font-size:13px;max-width:360px}.intro .button{font-size:12px;padding:8px}.lab-grid{grid-template-columns:minmax(0,1fr) 265px}.lab-title .pill{display:none}.scene{height:460px}.overlay-label{display:none}.scene-toolbar{justify-content:center}.room-caption{flex-wrap:wrap;max-width:250px;left:50%;transform:translateX(-50%);gap:8px 13px;bottom:46px}.room-instruction{font-size:10px;padding:0 12px}.simulation-bottom{padding:17px}.journey-metrics{flex-wrap:wrap;gap:8px 14px}.learning-bar{flex-wrap:wrap;gap:16px}.learning-stats{width:100%;justify-content:space-between}.learning-stats>div{flex-direction:row;align-items:center;gap:12px}.status{display:inline-block}.lower-grid{grid-template-columns:1fr}.parameter-grid{gap:25px 40px}.equation{font-size:19px}.concepts{grid-template-columns:1fr 1fr}.concepts h2 br{display:none}.concepts>div{grid-column:1/-1}.concepts>article:last-child{grid-column:1/-1}.concepts p{font-size:13px}footer{align-items:flex-start;flex-direction:column;gap:10px}footer div{flex-wrap:wrap;gap:8px 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/* Local topology editor; both the standalone and embedded lab share these controls. */
[hidden]{display:none!important}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.room-editor-bar{display:flex;align-items:center;gap:14px;padding:14px 20px;border-bottom:1px solid var(--line)}.room-editor-bar>span{font-size:12px;color:var(--muted)}
.room-editor{padding:18px 20px;border-bottom:1px solid var(--line);background:var(--panel)}
.editor-dimensions,.editor-actions,.edit-tools{display:flex;align-items:center;gap:8px;flex-wrap:wrap}.editor-dimensions label{font-size:12px;display:flex;gap:6px;align-items:center}.editor-dimensions input{width:58px;padding:9px 6px;border:1px solid var(--line);border-radius:5px;color:var(--text);background:var(--panel)}.editor-actions{margin-top:14px}.edit-tools{margin-right:auto}
.room-editor .button{font-size:12px;min-height:38px;padding:8px 10px}.room-editor button[aria-pressed=true],#edit-room[aria-pressed=true]{border-color:var(--cyan);box-shadow:inset 0 -2px var(--cyan)}
#edit-status{font-size:13px;margin:14px 0 4px;color:var(--cyan);min-height:20px}.editor-note{font-size:11px;line-height:1.6;color:var(--muted);margin:4px 0 0}
.editing .room-canvas canvas,.editing .tile-label{touch-action:none}.editing .tile-label{cursor:grab}.dragging,.dragging .tile-label{cursor:grabbing}.wall-label{color:#17394b;background:#e9f3f5d9;min-width:42px;min-height:26px}
.dense-grid .tile-label{min-width:30px;min-height:32px;gap:0}.dense-grid .tile-value{font-size:9px}.dense-grid .tile-arrow{font-size:15px}.dense-grid .terminal-label{min-width:32px;min-height:24px}
.journey-key{font-size:11px;display:flex;gap:18px;margin:10px 0}.journey-key span:first-child{color:#b77528}.journey-key span:last-child{color:var(--cyan)}
.fallback-grid{gap:4px}.fallback-grid button{min-width:0;font-size:11px;min-height:28px}.fallback-grid .blocked{color:white;background:#6d838f}
@media(max-width:600px){.room-editor-bar,.room-editor{padding:12px}.room-editor-bar>span{font-size:11px}.editor-dimensions{gap:6px}.editor-dimensions select{font-size:12px}.edit-tools{width:100%}.dense-grid .tile-label{min-width:22px;min-height:25px}.dense-grid .tile-value{font-size:8px}.dense-grid .tile-arrow{font-size:12px}.room-caption{gap:10px}.room-instruction{font-size:10px;padding:0 10px}}

.tile-label>span{pointer-events:none}