:root{color-scheme:light dark;--bg:#f6f8fa;--surface:#fff;--ink:#20363e;--muted:#526b75;--line:#d5e0e4;--a:#24758a;--b:#aa4b34;--accent:#26717c;--soft:#e6f0f2;--good:#277249;font-family:var(--font-family-sans,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif);font-size:16px;background:var(--bg);color:var(--ink)}
*{box-sizing:border-box}body{margin:0}button,input,select{font:inherit;color:inherit}button,select,input{border:1px solid var(--line);border-radius:6px;background:var(--surface);min-height:36px}button{padding:7px 12px;cursor:pointer}button:hover{background:var(--soft)}button:disabled{cursor:wait;opacity:.5}button:focus-visible,input:focus-visible,select:focus-visible{outline:2px solid var(--accent);outline-offset:3px}button[aria-pressed=true]{background:var(--soft);border-color:var(--accent)}::selection{background:#b8dce3;color:#142c35}input{caret-color:var(--accent)}[hidden]{display:none!important}.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%)}
#standalone-header{height:52px;padding:0 24px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line);background:var(--surface)}#standalone-header a{color:var(--ink);text-decoration:none;font-weight:650}#standalone-header>div{display:flex;gap:8px}main{max-width:1320px;margin:auto;padding:20px 28px 12px}.heading{display:flex;align-items:center;justify-content:space-between;gap:24px;margin-bottom:18px}h1{font-size:26px;line-height:1.2;letter-spacing:-.025em;margin:0 0 7px}p{margin:0;line-height:1.5}.heading p{color:var(--muted);font-size:15px}h2{font-size:19px;margin:0}h3{font-size:16px;margin:0 0 10px}.workspace{display:grid;grid-template-columns:minmax(0,1.48fr) minmax(350px,1fr);gap:30px;align-items:start}.bench{min-width:0}.settings{display:grid;grid-template-columns:1fr 1fr;gap:24px}.cart-settings{border:0;padding:0;margin:0;display:grid;gap:9px}.cart-settings legend{font-weight:700;font-size:17px;padding:0;margin-bottom:8px}.cart-settings label{display:flex;align-items:center;justify-content:space-between;gap:8px;font-size:14px;color:var(--ink)}.cart-settings input{width:82px;padding:4px 7px;font-variant-numeric:tabular-nums}.a{color:var(--a)}.b{color:var(--b)}.collision-controls{margin-top:14px;display:flex;align-items:center;justify-content:space-between;gap:10px;font-size:14px}.collision-controls label{display:flex;gap:9px;align-items:center}select{padding:5px 8px;max-width:220px}#positive{color:var(--muted)}
#scene{position:relative;height:250px;isolation:isolate;margin:6px -8px 0}#scene canvas{width:100%;height:100%;display:block}#loading,#retry{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);text-align:center;max-width:90%;z-index:4}#retry{top:68%}.scene-overlay{position:absolute;inset:0;pointer-events:none}.cart-hit{position:absolute;transform:translate(-50%,-50%);width:84px;height:52px;border:0;background:transparent!important;pointer-events:auto;border-radius:10px}.cart-hit:focus-visible{outline:2px solid var(--accent)}.cart-hit[data-cue=true]{outline:1px dashed var(--accent);outline-offset:4px}.cart-tag{position:absolute;transform:translate(-50%,-100%);white-space:nowrap;font-size:14px;line-height:1.4;text-align:center;font-variant-numeric:tabular-nums}.cart-tag strong{font-size:16px}.cart-tag span{display:block}.scene-cue{position:absolute;inset:0;width:100%;height:100%;overflow:visible;pointer-events:none}.tap-label{position:absolute;transform:translate(-50%,0);font-size:14px;color:var(--accent);white-space:nowrap}.coupling-note{position:absolute;bottom:8px;left:50%;transform:translateX(-50%);font-size:13px;color:var(--muted);white-space:nowrap}#status{min-height:45px;font-size:15px;color:var(--ink);padding:0 2px}.predict-row{display:flex;align-items:center;justify-content:space-between;gap:12px;font-size:14px;margin-top:8px}.model-note{font-size:13px;color:var(--muted);margin-top:12px;max-width:65ch}
.evidence{min-width:0;border-left:1px solid var(--line);padding-left:26px}.section-heading{display:flex;align-items:baseline;justify-content:space-between;gap:12px;margin:0 0 12px}#trial-label{font-size:13px;color:var(--muted)}#empty{padding-top:16px;max-width:35ch}#empty-note{margin-top:12px;font-size:14px;color:var(--muted)}#conditions{font-size:13px;color:var(--muted);margin-bottom:10px}table{border-collapse:collapse;width:100%;font-variant-numeric:tabular-nums}caption{text-align:left;font-size:13px;color:var(--muted);margin-bottom:6px}th,td{padding:6px 7px;text-align:right;border-bottom:1px solid var(--line);font-size:16px}th:first-child{text-align:left}thead th{font-size:13px;font-weight:600}tbody th{font-size:14px;font-weight:500}#prediction-result{font-size:13px;color:var(--muted);min-height:22px;margin-top:7px}.reasoning{margin-top:17px}#working{font-size:16px;font-variant-numeric:tabular-nums;line-height:1.7}.substitution{display:block}#comparison svg{display:block;width:100%;height:85px;margin-top:5px}#comparison text{font-family:inherit;font-size:12px;fill:var(--ink)}#comparison line{stroke:var(--line);stroke-width:1}#conclusion{font-size:14px;line-height:1.5;margin-top:8px;min-height:42px}.reason-actions{display:flex;gap:9px;margin-top:12px}#next{background:var(--accent);border-color:var(--accent);color:#fff}#next:hover{filter:brightness(.93)}#history{margin-top:18px;border-top:1px solid var(--line);padding-top:12px}#history h3{font-size:14px;margin-bottom:8px}#history-rows{display:flex;gap:6px;flex-wrap:wrap}#history-rows button{font-size:13px;min-height:32px;padding:4px 8px;font-variant-numeric:tabular-nums}.new-row{animation:row-arrival .7s ease-out}@keyframes row-arrival{from{background:#c6e4df}to{background:transparent}}footer{font-size:13px;color:var(--muted);margin-top:18px}footer details{max-width:95ch}footer summary{cursor:pointer}footer p{padding-top:8px;line-height:1.6}
.full-working{font-size:13px;line-height:1.5;color:var(--muted);margin-top:5px}.full-working summary{cursor:pointer}.full-working p{margin-top:6px}.embed #standalone-header{display:none}
#history{display:flex;align-items:center;gap:12px;padding-top:8px}#history h3{margin:0;white-space:nowrap}#history-rows{min-width:0;flex:1}#history-select{max-width:100%;width:100%;font-size:13px}
@media(min-width:1100px) and (max-height:800px){main{padding-top:15px}.heading{margin-bottom:14px}#scene{height:200px}#status{min-height:0}.model-note{margin-top:8px}.reasoning{margin-top:12px}#history{margin-top:8px}footer{margin-top:12px}#conclusion{min-height:0}#comparison svg{height:72px}}
@media(max-width:900px){main{padding:16px}.workspace{grid-template-columns:1fr;gap:22px}.evidence{border-left:0;border-top:1px solid var(--line);padding:20px 0 0}.heading{align-items:start;gap:12px}h1{font-size:24px}.settings{gap:18px}.cart-settings label{align-items:start;flex-direction:column;gap:4px}.cart-settings input{width:100%}.collision-controls{align-items:start}.predict-row{align-items:start;flex-direction:column}#scene{height:260px}#status{min-height:0}#standalone-header{padding:0 16px}#guide{display:none}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important}}
@media(prefers-color-scheme:dark){:root{--bg:#17242b;--surface:#203139;--ink:#e3edf0;--muted:#abc1cb;--line:#3b5059;--a:#77c5d8;--b:#f2a38e;--accent:#398896;--soft:#29434c;--good:#8ec7a4}#next{background:#286e7b}::selection{background:#356779;color:#fff}}

@media(min-width:901px){#scene{height:260px}.cart-settings{gap:6px}.cart-settings legend{margin-bottom:5px}.collision-controls{margin-top:10px}}.cart-hit[data-cue=true]{outline:none}