:root{--green:#22c670;--deep:#087442;--night:#061914;--ink:#122033;--mint:#f4fbf7;--line:#d4e9dd;--muted:#60766c;--gold:#f5c542;--coral:#dc4c55}
*{box-sizing:border-box} [hidden]{display:none!important} body{margin:0;background:var(--mint);color:var(--ink);font:14px/1.5 Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}button,input,select{font:inherit}button,select,input{accent-color:var(--deep)}button{cursor:pointer}button:disabled{cursor:default;opacity:.38}button,select{color:var(--ink)}button{border:1px solid transparent;background:none}button svg{width:18px;height:18px;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}a{color:inherit}button:focus-visible,select:focus-visible,input:focus-visible,canvas:focus-visible,summary:focus-visible,a:focus-visible{outline:3px solid var(--deep);outline-offset:3px}button:not(:disabled):hover{filter:brightness(.96)}.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap}.skip-link{position:absolute;top:-100px;z-index:20;padding:12px;background:white}.skip-link:focus{top:4px}
#lab{max-width:1900px;margin:auto;padding:0 22px} .topbar{height:76px;display:flex;align-items:center;justify-content:space-between;gap:20px}.brand{display:flex;align-items:center;gap:9px;text-decoration:none;min-width:174px}.brand img{width:35px;height:38px;object-fit:contain}.brand b{font-size:19px;letter-spacing:-.65px;font-weight:850}.brand b span{color:var(--deep)}.brand small{display:block;font-size:8px;letter-spacing:1.7px;font-weight:750;color:var(--muted);margin-top:-3px}.modes{display:flex;gap:4px;background:#e9f2ed;border:1px solid #dce9e2;border-radius:13px;padding:4px}.modes button{padding:9px 18px;border-radius:9px;font-weight:700;font-size:12px;white-space:nowrap;color:var(--muted)}.modes button span{font-size:9px;margin-right:7px;opacity:.6}.modes button.active{background:white;color:var(--deep);box-shadow:0 2px 6px #123a2512;border-color:#dce9e2}.help-button{border:1px solid var(--line);width:31px;height:31px;border-radius:50%;font-weight:750;background:white}.workshop{border:1px solid var(--line);border-radius:19px;background:white;box-shadow:0 10px 36px #123f2610;overflow:hidden}.workshop-heading{padding:21px 24px 19px;display:flex;align-items:center;justify-content:space-between;gap:15px}.eyebrow{font-size:9px;font-weight:800;letter-spacing:1.55px;color:var(--muted);display:block}.title .eyebrow{color:var(--deep);font-size:8px}h1{font-size:29px;line-height:1.1;letter-spacing:-1.1px;margin:6px 0 0;font-weight:800}.title-dot{color:var(--green)}.transport{display:flex;gap:6px;align-items:center}.primary,.quiet{display:inline-flex;justify-content:center;align-items:center;gap:7px;padding:9px 15px;font-size:12px;font-weight:700;border-radius:9px}.primary{background:var(--green);border-color:#1cbb66;color:var(--night);box-shadow:0 3px 7px #22c67020}.quiet{background:white;border-color:var(--line)}.quiet[aria-pressed=true]{background:#e8f8ee;border-color:#9fd7b7;color:var(--deep)}.text-button{font-size:11px;font-weight:650;color:var(--muted);padding:7px 3px}.contextbar{padding:10px 24px;border-top:1px solid #edf3ef;border-bottom:1px solid var(--line);background:#fcfefd;display:flex;align-items:center;gap:18px;min-height:50px}.context-left{display:flex;align-items:center;gap:12px;flex:1;min-width:0}.context-left p{margin:0;color:var(--muted);font-size:11px}.state-tag{padding:3px 8px;border-radius:5px;font-size:8px;letter-spacing:1px;font-weight:850;background:#e7f4ec;color:var(--deep)}.state-tag.running{background:#123d2c;color:#9df0bf}.preset-control{font-size:10px;color:var(--muted);display:flex;align-items:center;gap:7px}.preset-control select{border:1px solid var(--line);border-radius:6px;padding:5px 20px 5px 8px;font-size:11px;background:white;max-width:240px}
.workspace-layout{display:grid;grid-template-columns:88px minmax(0,1fr);position:relative;min-height:440px}.workspace-layout.inspector-open{grid-template-columns:88px minmax(0,1fr) 246px}.parts{background:#f9fcfa;padding:15px 9px;border-right:1px solid var(--line);display:flex;flex-direction:column;align-items:stretch;gap:3px;z-index:3}.tray-heading{text-align:center;font-size:7px;letter-spacing:.9px;font-weight:850;color:var(--muted);margin-bottom:8px;white-space:nowrap}.part{border:1px solid transparent;border-radius:9px;display:flex;align-items:center;flex-direction:column;padding:5px 2px;font-size:9px;font-weight:650;gap:1px;touch-action:none}.part svg{width:43px;height:33px;stroke:none}.part:not(:disabled):hover,.part.active{background:white;border-color:#b0d7c0;box-shadow:0 2px 5px #123f2610}.tray-rule{border-top:1px solid var(--line);margin:6px 9px}.tray-note{font-size:8px;line-height:1.6;text-align:center;color:var(--muted);margin:10px 0 0}.stage{position:relative;min-width:0;overflow:hidden;background:#fdfffe;height:clamp(440px,calc(100svh - 274px),780px);touch-action:none}.stage canvas{width:100%;height:100%;display:block;touch-action:none;outline-offset:-4px}.stage-top{position:absolute;left:22px;right:20px;top:19px;display:flex;justify-content:space-between;align-items:flex-start;gap:8px;pointer-events:none;z-index:1}.stage-top .eyebrow{font-size:8px;letter-spacing:1.3px}.stage-top #selection-note{display:block;font-size:10px;color:#899d92;margin-top:4px}.stage-actions{display:flex;gap:5px;pointer-events:auto}.small-button{border:1px solid var(--line);border-radius:7px;background:#ffffffeb;padding:6px 9px;font-size:10px;color:var(--muted);white-space:nowrap}.small-button span{color:var(--deep);margin-left:6px}.view-tools{position:absolute;right:17px;bottom:18px;display:flex;align-items:center;background:#fff;border:1px solid var(--line);border-radius:9px;padding:3px;box-shadow:0 2px 8px #123f2608}.view-tools button{display:flex;align-items:center;justify-content:center;min-width:30px;height:30px;font-size:19px;border-radius:5px}.view-tools button[aria-pressed=true]{color:var(--deep);background:#e5f6ec}.view-tools svg{width:15px;height:15px}.view-tools span{font-size:9px;color:var(--muted);min-width:35px;text-align:center;font-variant-numeric:tabular-nums}.view-tools i{height:16px;border-left:1px solid var(--line);margin:0 4px}.stage-hint{position:absolute;bottom:25px;left:23px;display:flex;align-items:center;gap:7px;font-size:9px;color:var(--muted);pointer-events:none;max-width:calc(100% - 260px)}.hint-dot{background:var(--green);width:5px;height:5px;border-radius:50%;flex:none}.placement-message{position:absolute;left:50%;transform:translateX(-50%);bottom:68px;padding:8px 16px;border:1px solid #a1d8b7;border-radius:20px;background:#edfcf2;font-size:11px;white-space:nowrap;pointer-events:none}.empty-message{position:absolute;left:50%;top:45%;transform:translate(-50%,-50%);text-align:center;pointer-events:none}.empty-message strong{font-size:22px}.empty-message p{font-size:12px;color:var(--muted)}.inspector{padding:16px;border-left:1px solid var(--line);background:#fcfefd;overflow:auto;max-height:780px;z-index:4}.inspector-heading{display:flex;align-items:center;justify-content:space-between}.inspector-heading button{font-size:20px;color:var(--muted);padding:0 3px}.inspector h2{font-size:20px;letter-spacing:-.5px;margin:2px 0 12px}.field{display:block;margin:13px 0;font-size:10px;font-weight:650;color:var(--muted)}.field>span{display:flex;justify-content:space-between;gap:8px;margin-bottom:5px}.field small{font-size:9px;color:#7b8e84;font-weight:400;display:block;margin-top:3px}.field input[type=number],.field select{width:100%;margin-top:4px;padding:8px 10px;border:1px solid var(--line);border-radius:7px;background:white;color:var(--ink);font-size:12px;font-variant-numeric:tabular-nums}.field input:disabled,.field select:disabled{color:#7b8e84;background:#f2f6f3}.field.check{display:flex;gap:7px;align-items:center}.muted{font-size:10px;color:var(--muted)}.object-picker{border-bottom:1px solid var(--line);padding-bottom:14px}.object-actions{border-top:1px solid var(--line);padding-top:13px;display:flex;gap:7px}.object-actions button{font-size:10px;padding:7px 11px}.danger{color:#b13b48}.bottom-toolbar{padding:10px 17px;display:flex;align-items:center;gap:18px;border-top:1px solid var(--line);min-height:52px}.history-tools{display:flex;gap:3px;padding-right:14px;border-right:1px solid var(--line)}.history-tools button{width:29px;height:28px;border:1px solid var(--line);border-radius:6px;font-size:18px;line-height:1}.overlay-controls{display:flex;flex-wrap:wrap;gap:10px 18px;flex:1}.overlay-controls label{display:flex;align-items:center;gap:5px;font-size:10px;color:var(--muted);white-space:nowrap;cursor:pointer}.overlay-controls input{width:13px;height:13px;margin:0}.settings{display:flex;align-items:center;flex-wrap:wrap;gap:20px;padding:15px 24px;background:#f4faf6;border-top:1px solid var(--line)}.settings>label{font-size:11px;font-weight:650;color:var(--muted)}.settings select{margin-left:8px;border:1px solid var(--line);border-radius:6px;padding:6px;background:white;font-size:11px}.settings output{font-size:10px;margin-left:8px;font-weight:400}.damping-control input{display:block;width:170px}.ignore-control small{display:block;font-size:9px;font-weight:400}.settings p{font-size:9px;color:var(--muted);max-width:260px;margin:0}
.evidence{border-top:1px solid var(--line);padding:19px 24px;display:grid;grid-template-columns:1.6fr 1fr 1fr 1.15fr;gap:18px;align-items:center;background:#fafffc}.evidence h2{font-size:16px;margin:5px 0;letter-spacing:-.3px}.evidence-heading p{font-size:10px;color:var(--muted);margin:0;max-width:300px}.moment-value{border-left:1px solid var(--line);padding-left:20px;min-height:70px;display:flex;flex-direction:column;justify-content:center}.moment-value>span{font-size:10px;color:var(--muted)}.moment-value strong{font-size:24px;letter-spacing:-.7px;font-variant-numeric:tabular-nums;font-weight:750}.moment-value strong small{font-size:12px;color:var(--muted);font-weight:500;letter-spacing:0}.moment-value>small{font-size:9px;color:var(--deep)}.moment-value.net strong{color:var(--deep)}.beam-ledger{grid-column:1/-1;display:flex;flex-wrap:wrap;gap:6px}.beam-ledger button{border:1px solid var(--line);background:white;border-radius:6px;padding:5px 8px;font-size:10px;display:flex;gap:8px}.beam-ledger button.selected{border-color:var(--green);box-shadow:0 0 0 1px #22c67030}.force-ledger{grid-column:1/-1;font-size:10px;color:var(--muted)}.force-ledger summary{cursor:pointer}.force-ledger p{margin-bottom:0}.table-scroll{overflow:auto}table{border-collapse:collapse;width:100%;text-align:left;margin-top:12px}td,th{padding:7px;border-bottom:1px solid var(--line);font-variant-numeric:tabular-nums}.challenge-panel{padding:20px 24px;display:flex;gap:17px;border-top:1px solid var(--line);background:#f7fcf9;align-items:flex-start}.challenge-number{background:#e3f4e9;color:var(--deep);border:1px solid #c4e7d3;width:43px;height:43px;border-radius:12px;display:grid;place-items:center;font-size:18px;font-weight:750;flex:none}.challenge-copy{flex:1}.challenge-copy h2{font-size:18px;letter-spacing:-.4px;margin:3px 0}.challenge-copy p{font-size:11px;color:var(--muted);margin:6px 0}.challenge-copy .challenge-status{color:var(--deep);font-weight:650}.challenge-copy #hint-text,.challenge-copy #solution-text{padding:9px 12px;background:white;border:1px solid var(--line);border-radius:7px;color:var(--ink);max-width:700px}.challenge-actions{display:flex;flex-direction:column;gap:4px;min-width:150px}.challenge-actions .quiet{font-size:10px}.challenge-actions .primary{font-size:10px}footer{display:flex;justify-content:space-between;gap:20px;color:#73897d;font-size:9px;padding:15px 3px 17px}footer b{color:var(--deep);font-weight:700;margin-left:3px}.toast{position:fixed;bottom:24px;left:50%;transform:translateX(-50%);z-index:40;background:#103c2b;color:white;padding:12px 20px;border-radius:10px;font-size:12px;box-shadow:0 6px 24px #06191424;max-width:min(90vw,600px)}dialog{border:1px solid var(--line);border-radius:18px;padding:32px;max-width:580px;width:calc(100% - 30px);color:var(--ink);box-shadow:0 20px 100px #06191430}dialog::backdrop{background:#06191460;backdrop-filter:blur(3px)}dialog h2{font-size:26px;line-height:1.2;letter-spacing:-.8px}dialog li{font-size:12px;margin:12px 0}dialog ol{padding-left:20px}dialog p{font-size:11px;color:var(--muted)}.dialog-close{position:absolute;right:14px;top:8px;font-size:25px}.mobile-only,.drawer-close{display:none}#lab:fullscreen{background:var(--mint);overflow:auto;max-width:none}#lab:fullscreen .stage{height:calc(100svh - 267px)}
@media(min-width:1500px){#lab{padding:0 34px}.stage{height:clamp(530px,calc(100svh - 274px),850px)}.workspace-layout.inspector-open{grid-template-columns:94px minmax(0,1fr) 260px}.parts{padding:17px 11px}.part{padding:8px 2px}.part svg{height:38px;width:47px}}
@media(max-width:1000px){#lab{padding:0 12px}.topbar{height:65px}.modes button{padding:8px 12px}.brand{min-width:140px}.brand b{font-size:17px}.workspace-layout.inspector-open{grid-template-columns:78px minmax(0,1fr)}.workspace-layout{grid-template-columns:78px minmax(0,1fr)}.inspector{position:absolute;right:0;top:0;bottom:0;width:246px;box-shadow:-8px 0 20px #103c2b0e}.stage{height:clamp(480px,calc(100svh - 254px),760px)}.stage-hint{font-size:8px}.bottom-toolbar{gap:12px}.overlay-controls{gap:8px 12px}.evidence{grid-template-columns:1.4fr 1fr 1fr 1.1fr;gap:10px}.moment-value{padding-left:12px}.moment-value strong{font-size:21px}.contextbar{gap:12px}.context-left p{font-size:10px}.workshop-heading{padding:18px 20px}.inspector .field{margin:11px 0}}
@media(max-width:680px){#lab{padding:0 8px}.topbar{height:auto;min-height:95px;display:grid;grid-template-columns:1fr auto;gap:7px;padding:12px 4px 10px}.brand img{width:27px;height:30px}.brand b{font-size:16px}.brand small{font-size:7px}.modes{grid-column:1/-1;grid-row:2;justify-content:stretch;gap:2px;padding:3px}.modes button{flex:1;font-size:10px;padding:8px 6px}.modes button span{font-size:8px;margin-right:4px}.help-button{grid-row:1;grid-column:2;width:27px;height:27px}.workshop{border-radius:13px}.workshop-heading{padding:15px 12px;gap:8px}.title .eyebrow{font-size:6px;letter-spacing:1px}h1{font-size:24px;letter-spacing:-.8px}.transport{gap:4px}.transport button{padding:8px;font-size:10px;gap:5px}.transport button svg{width:14px;height:14px}#restart span{display:none}.contextbar{padding:9px 12px;flex-wrap:wrap;gap:8px}.context-left{flex-basis:calc(100% - 80px);gap:7px}.context-left p{font-size:9px;line-height:1.5}.contextbar>#reset-mode{order:1;margin-left:auto;font-size:9px}.preset-control{order:2;width:100%;justify-content:space-between}.preset-control select{flex:1;max-width:none}.workspace-layout,.workspace-layout.inspector-open{grid-template-columns:minmax(0,1fr)}.stage{height:clamp(390px,calc(100svh - 300px),660px);min-height:390px}.parts{display:none;position:absolute;left:0;top:0;bottom:0;width:82px;overflow:auto;box-shadow:8px 0 20px #103c2b0e}.parts.open{display:flex}.tray-heading{white-space:normal;font-size:6px}.drawer-close{display:inline-block;font-size:16px;padding:0 0 0 5px}.part{padding:5px 0}.part svg{height:29px}.tray-rule{margin:4px 10px}.tray-note{font-size:7px}.mobile-only{display:inline-flex}.stage-top{left:13px;right:11px;top:14px}.stage-top .eyebrow{font-size:6px;letter-spacing:.8px}.stage-top #selection-note{font-size:8px;max-width:150px}.small-button{padding:5px 7px;font-size:9px}.view-tools{right:11px;bottom:14px}.view-tools button{min-width:27px;height:28px}.view-tools span{min-width:32px}.stage-hint{bottom:63px;left:14px;right:10px;max-width:none;font-size:8px}.placement-message{font-size:9px;bottom:89px;padding:7px 10px;max-width:94%;white-space:normal;text-align:center}.inspector{width:min(270px,85vw)}.bottom-toolbar{padding:10px 12px;gap:10px;flex-wrap:wrap}.history-tools{padding-right:10px}.overlay-controls{order:3;flex-basis:100%;gap:10px 15px}.overlay-controls label{font-size:9px}.overlay-controls input{width:14px;height:14px}#settings-toggle{margin-left:auto;font-size:10px}.settings{padding:14px;gap:14px}.settings p{max-width:none}.settings>label{font-size:10px}.evidence{padding:16px 14px;grid-template-columns:1fr 1fr 1fr;gap:12px}.evidence-heading{grid-column:1/-1}.moment-value{padding-left:10px;min-height:63px}.moment-value:nth-child(2){border-left:none;padding-left:0}.moment-value strong{font-size:19px}.moment-value strong small{font-size:10px}.moment-value>span{font-size:8px}.moment-value>small{font-size:8px}.challenge-panel{padding:16px 14px;gap:10px;flex-wrap:wrap}.challenge-number{width:32px;height:32px;font-size:14px;border-radius:9px}.challenge-copy h2{font-size:16px}.challenge-copy p{font-size:10px}.challenge-actions{flex-basis:100%;flex-direction:row;flex-wrap:wrap;justify-content:flex-end}.challenge-actions .quiet{padding:7px 10px}.challenge-actions .text-button{font-size:9px}.challenge-copy .eyebrow{font-size:7px}footer{font-size:8px;gap:10px;padding:12px 4px}footer span:last-child{max-width:50%;text-align:right}#lab:fullscreen .stage{height:calc(100svh - 292px);min-height:390px}}
:root{--stage-height:clamp(440px,calc(100svh - 316px),780px)}
.stage,.parts,.inspector,#lab:fullscreen .stage{height:var(--stage-height);max-height:var(--stage-height)}
.parts{overflow-y:auto;overflow-x:hidden}
.challenge-stage .stage-top #selection-note{font-size:13px;line-height:1.5;color:var(--ink);font-weight:600;max-width:480px;margin-top:8px}
@media(min-width:1500px){:root{--stage-height:clamp(530px,calc(100svh - 316px),850px)}}
@media(max-width:1000px){:root{--stage-height:clamp(480px,calc(100svh - 302px),760px)}}
@media(max-width:680px){:root{--stage-height:clamp(390px,calc(100svh - 342px),660px)}}
@media(max-height:850px) and (min-width:681px){.parts{gap:1px;padding-top:10px;padding-bottom:10px}.part{padding:4px 2px}.tray-note{display:none}}
@media(max-width:680px){.challenge-stage .stage-top{flex-wrap:wrap}.challenge-stage .stage-top>div:first-child{max-width:100%}.challenge-stage .stage-top #selection-note{font-size:11px;max-width:100%;margin-top:5px}.challenge-stage .stage-actions{margin-left:auto}.part{min-height:48px}.small-button{min-height:34px}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{scroll-behavior:auto!important;transition:none!important}}
.interaction-toolbar{display:flex;align-items:center;flex-wrap:wrap;gap:8px;padding:8px 18px;border-bottom:1px solid var(--line);background:#f8fcfa;font-size:11px}.interaction-toolbar button,.interaction-toolbar select{border:1px solid var(--line);border-radius:7px;background:white;min-height:34px;padding:5px 10px;font-weight:650}.interaction-toolbar button[aria-pressed="true"]{background:#dff8e9;border-color:var(--green);color:var(--deep)}.drag-tools{display:flex;gap:3px}.ruler-controls{display:flex;align-items:center;flex-wrap:wrap;gap:6px}.ruler-controls output{font-size:16px;font-weight:800;min-width:56px;text-align:right;font-variant-numeric:tabular-nums;color:var(--deep)}#ruler-a,#ruler-b{width:34px;border-radius:50%;padding:5px}#ruler-components{color:var(--muted);font-variant-numeric:tabular-nums}#interaction-note{color:var(--muted);margin-left:auto;font-size:10px}.ruler-controls:not([hidden])~#interaction-note{display:none}
.inspector-heading button{min-width:36px;min-height:36px;border-radius:7px}
@media(max-width:1000px){.inspector-heading button{min-width:44px;min-height:44px}}
@media(max-width:680px){.interaction-toolbar{padding:7px 12px;gap:6px}.interaction-toolbar button{min-height:38px}.ruler-controls{width:100%;gap:5px}.ruler-controls output{min-width:45px}#ruler-components{flex-basis:100%;font-size:10px}#interaction-note{max-width:115px;font-size:9px}}