:root{--ink:#202739;--muted:#81879a;--accent:#6261de;--teal:#20a69b;--line:#e8eaf0;--paper:#f7f8fb}*{box-sizing:border-box}body{margin:0;color:var(--ink);background:var(--paper);font:14px/1.5 Inter,-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC",sans-serif}button,input,select,textarea{font:inherit}button{cursor:pointer;transition:background .16s,transform .16s}button:disabled{cursor:default;opacity:.45}button:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible{outline:3px solid #b5b1ff;outline-offset:3px}[hidden]{display:none!important}button{border:0}a{color:inherit;text-decoration:none}.topbar{height:76px;border-bottom:1px solid var(--line);background:#fff;display:flex;align-items:center;justify-content:space-between;padding:0 clamp(24px,2vw,48px)}.brand{display:flex;align-items:center;gap:11px;font-weight:750;letter-spacing:1.8px;font-size:15px}.brand 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p{margin:0;color:var(--muted);font-size:13px}.engine{display:flex;align-items:center;gap:10px;padding:13px 17px;border:1px solid var(--line);border-radius:10px;background:#fff}.engine-dot{width:8px;height:8px;box-shadow:0 0 0 5px #e5f5f0}.engine strong{font-size:12px;display:block}.engine small{font-size:10px;color:var(--muted);display:block;margin-top:3px}.chip{font:9px ui-monospace,monospace;background:#f1f0ff;color:var(--accent);padding:4px 6px;border-radius:4px;margin-left:16px}.workspace{display:grid;grid-template-columns:320px minmax(0,1fr);gap:26px;align-items:start}.panel{background:#fff;border:1px solid var(--line);border-radius:12px;overflow:hidden;box-shadow:0 3px 8px #1d254703}.editor-panel{position:sticky;top:18px}.panel-heading{padding:22px 20px 16px;display:flex;align-items:center;gap:9px}.section-index{font:10px ui-monospace,monospace;color:#aaaec0;letter-spacing:1px}h2{font-size:14px;margin:0;font-weight:650}.tag{margin-left:auto;background:#f3f4f8;border-radius:4px;padding:3px 7px;font-size:9px;color:#81869a}.preset-grid{display:grid;grid-template-columns:1fr 1fr;gap:8px;padding:0 20px}.preset-grid button{border:1px solid var(--line);border-radius:7px;background:#fff;color:#737a8b;text-align:left;font-size:12px;padding:10px}.preset-grid small{display:block;font:7px ui-monospace,monospace;letter-spacing:.6px;margin-top:3px;opacity:.7}.preset-grid button.selected{border-color:#b4aff1;background:#f6f5ff;color:#5956cb}.preset-grid button:hover{background:#f3f2ff}.equations{margin:18px 20px;background:#f8f9fc;border:1px solid #eef0f5;border-radius:7px;padding:12px}.equations>span{display:block;color:#9a9eb0;font-size:8px;letter-spacing:1.3px}.equations code{display:block;font:12px/1.8 ui-monospace,SFMono-Regular,monospace;margin-top:6px;color:#656481}.equations small{font:9px ui-monospace,monospace;color:#9697ac;display:block;margin-top:8px}.tabs{display:flex;padding:0 20px;border-bottom:1px solid var(--line);gap:20px}.tabs button{padding:8px 0 10px;background:transparent;color:#8a8da0;font-size:12px;border-bottom:2px solid transparent}.tabs button[aria-selected=true]{color:var(--accent);border-color:var(--accent)}.tabs span{margin-left:7px;font:10px monospace}#controls{padding:18px 20px 8px}.slider-field{margin-bottom:20px}.slider-field label{display:flex;justify-content:space-between;font-size:11px;margin-bottom:9px}.slider-field label span{font-size:9px;color:#979bad}.slider-field output{color:var(--accent);font:11px ui-monospace,monospace}input[type=range]{appearance:none;width:100%;height:4px;background:#e9e7f5;border-radius:5px;accent-color:var(--accent);cursor:pointer;margin:4px 0}input[type=range]::-webkit-slider-thumb{appearance:none;width:13px;height:13px;border-radius:50%;background:var(--accent);box-shadow:0 0 0 3px #fff}.range-labels{display:flex;justify-content:space-between;color:#a0a4b4;font-size:9px;margin-top:5px}.input-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin:4px 0 16px}.input-grid label{font-size:10px;color:#83889c}.input-grid input{display:block;width:100%;margin-top:5px;border:1px solid #e5e7ee;border-radius:6px;background:#fcfcfe;padding:7px 9px;font:12px ui-monospace,monospace;color:#484e63}.toggle{font-size:10px;display:flex;align-items:center;gap:6px}.toggle input{accent-color:var(--accent)}.toggle small{color:#a4a8b6;margin-left:auto;font-size:9px}#code-panel{padding:15px 20px 0}.code-label{font-size:10px;color:#989baa;display:block;margin-bottom:8px}textarea{resize:vertical;width:100%;min-height:337px;border:0;border-radius:7px;background:#232839;color:#d8d9f3;padding:15px;font:11px/1.8 ui-monospace,SFMono-Regular,monospace;tab-size:2}.code-note{font-size:10px;color:#979bad}.run-area{padding:0 20px 18px}.primary{background:var(--accent);color:white;border-radius:7px;width:100%;padding:12px;display:flex;align-items:center;gap:9px;font-size:12px;box-shadow:0 4px 10px #6861d32a}.primary:hover{background:#5352c7}.primary kbd{margin-left:auto;font:10px inherit;opacity:.5}.run-caption{gap:10px;display:flex;justify-content:space-between;align-items:center;font-size:9px;color:#a3a6b4;margin-top:9px}.text-button{padding:0;background:none;color:#8b8fa2;font-size:10px}.text-button:hover{color:var(--accent)}#cancel{margin-top:8px;width:100%;border:1px solid #e6ced5;background:#fff7f9;color:#b34b62;padding:7px;border-radius:6px;font-size:11px}#error{font-size:11px;color:#b34b62;background:#fff3f5;border-radius:6px;padding:10px;margin-bottom:10px;white-space:pre-wrap;word-break:break-word}.progress-track{height:3px;background:#f4f3fa;margin-top:10px;border-radius:4px;overflow:hidden}#progress{height:100%;width:0;background:var(--teal);transition:width .12s}.results-heading{display:flex;align-items:center;justify-content:space-between;margin:4px 0 15px}.results-heading>div{display:flex;align-items:center;gap:10px}#status{font-size:10px;color:#9297a8}.metrics{display:grid;grid-template-columns:repeat(4,1fr);gap:13px;margin-bottom:19px}.metrics article{border:1px solid var(--line);border-radius:9px;padding:16px 17px;background:white}.metrics article>span{font-size:10px;color:#8f94a7}.metrics article>div{display:flex;align-items:baseline;gap:7px;margin:7px 0}.metrics strong{font-size:26px;letter-spacing:-1px;font-weight:550;font-variant-numeric:tabular-nums}.metrics article:first-child strong{color:var(--accent)}.metrics small{color:#989fb0;font-size:9px}.metrics p{color:#a0a5b6;font-size:9px;margin:0}.chart-heading{padding:19px 20px 6px;display:flex;align-items:center;justify-content:space-between;gap:10px}h3{font-size:12px;font-weight:600;margin:0}h3 span{font-size:8px;color:#a0a6b7;font-weight:400;letter-spacing:1px;margin-left:8px}.chart-heading p{font-size:9px;color:#a0a6b7;margin:5px 0 0}.legend{display:inline-flex;align-items:center;gap:5px;font-size:9px;color:#949aad;white-space:nowrap}.legend i{width:6px;height:6px;background:var(--accent);border-radius:50%;display:inline-block}.legend .teal{background:var(--teal);margin-left:9px}.canvas-wrap{position:relative}canvas{display:block;width:100%;height:200px}.raster-panel canvas{height:250px}.trace-panel canvas{height:170px}.timeline{border-top:1px solid #f1f2f6;padding:10px 20px;display:flex;align-items:center;gap:12px;font-size:9px;color:#989eaf}.timeline>button:first-child{color:#7772cb;background:#f5f4ff;border-radius:5px;white-space:nowrap;font-size:10px;padding:5px 9px}.timeline label{white-space:nowrap}.timeline input{flex:1;min-width:30px}.timeline output{white-space:nowrap;font:9px monospace}.timeline .text-button{white-space:nowrap}.chart-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin:18px 0}.chart-heading.compact{padding:17px 18px 5px}.select-label{font-size:9px;color:#9a9fb1;white-space:nowrap}.select-label select{font-size:9px;padding:3px 4px;border:1px solid #e7e8f1;border-radius:4px;background:#fff;color:#777d94;margin-left:7px}.small-note{font-size:9px;color:#a4a9b8}.chart-foot{font-size:9px;color:#a8adba;margin:0;padding:0 20px 12px}.trace-controls{display:flex;gap:18px;align-items:center}.run-footer{display:flex;justify-content:space-between;color:#a5aab9;font:9px ui-monospace,monospace;padding:12px 2px}footer{border-top:1px solid var(--line);margin-top:32px;padding-top:18px;display:flex;justify-content:space-between;color:#a6abba;font:9px ui-monospace,monospace;letter-spacing:1px}footer span{letter-spacing:0;font:10px inherit}.chart-tooltip{position:absolute;background:#262d42;color:white;font:10px/1.7 ui-monospace,monospace;padding:7px 10px;border-radius:5px;pointer-events:none;box-shadow:0 2px 10px #0002}.stale .results-heading h2::after{content:' · Previous results';color:#a9a6c9;font-size:10px;font-weight:400}@media(min-width:1500px){.workspace{grid-template-columns:350px minmax(0,1fr)}.raster-panel canvas{height:280px}}@media(max-width:1100px){main{padding:26px 24px}.workspace{grid-template-columns:280px minmax(0,1fr);gap:18px}.metrics{gap:8px}.metrics article{padding:12px 10px}.metrics strong{font-size:22px}.metrics small{font-size:8px}.hero .engine{display:none}.chart-grid{gap:12px}h3 span{display:none}.topbar{padding:0 24px}.trace-controls{gap:8px}.small-note{display:none}}@media(max-width:760px){.workspace{grid-template-columns:1fr}.editor-panel{position:static}.hero{margin-bottom:20px}main{padding:24px 16px}.topbar{padding:0 16px;height:62px}.brand small,.local-badge{display:none}.brand{font-size:12px}.metrics{grid-template-columns:1fr 1fr}.chart-grid{grid-template-columns:1fr}.hero h1{font-size:24px}.hero p{font-size:11px}.results-heading{margin-top:14px}.raster-panel canvas{height:230px}footer{display:block}footer span{display:block;margin-top:8px}.run-footer{font-size:8px}.legend{font-size:8px}}

.panel-heading{flex-wrap:wrap}.run-caption .text-button{flex-shrink:0}.input-grid{align-items:end}.results-heading{gap:12px;flex-wrap:wrap}.chart-heading.compact{flex-wrap:wrap}.metrics article{min-width:0}.metrics article>div{flex-wrap:wrap}.run-footer{gap:12px;flex-wrap:wrap}

.model-picker{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin:-8px 0 24px}.model-picker button{display:flex;align-items:center;justify-content:space-between;gap:12px;text-align:left;padding:14px 18px;border:1px solid var(--line);background:#fff;border-radius:9px;color:#7b8194}.model-picker strong{font-size:13px}.model-picker span{font-size:10px}.model-picker button[aria-pressed=true]{border-color:#aaa5ed;background:#f0efff;color:#5651c7;box-shadow:inset 3px 0 #726bdc}.model-description{font-size:11px;color:#7b8194;margin:0 20px 16px}.model-reference{padding:8px 20px 18px;font-size:9px;color:#989dad}.model-reference p{margin:0 0 7px}.model-reference a{color:var(--accent)}.equations code{white-space:pre-wrap;font-size:10px}.equations small{white-space:normal;line-height:1.6}.slider-field label{gap:8px}.slider-field label>span:last-child{white-space:nowrap}.trace-panel #aux-trace{height:140px;border-top:1px solid #f3f4f8}.trace-panel #trace{height:200px}.trace-controls{flex-wrap:wrap}#trace-legend{flex-wrap:wrap;white-space:normal}.model-reference a:hover{text-decoration:underline}
@media(max-width:1100px){.model-picker button{display:block;padding:12px}.model-picker span{display:block;margin-top:4px}}
@media(max-width:760px){.model-picker{gap:7px;margin:0 0 20px}.model-picker button{padding:10px 8px}.model-picker strong{font-size:11px}.model-picker span{font-size:9px}.trace-panel #trace{height:190px}}

.model-picker{grid-template-columns:repeat(4,minmax(0,1fr))}.model-picker button{display:block}.model-picker span{display:block;margin-top:3px}.network-panel{margin-bottom:18px}.network-scroll{overflow-x:auto}.network-scroll canvas{min-width:700px;height:355px}.network-legend{display:flex;gap:16px;flex-wrap:wrap;padding:8px 20px;color:#949aad;font-size:9px}.network-legend span{display:flex;gap:5px;align-items:center}.network-legend i{width:6px;height:6px;display:inline-block;border-radius:50%}.network-selection{font:10px/1.7 ui-monospace,monospace;padding:0 20px;overflow-wrap:anywhere;color:#777f93;min-height:34px}.group-rates-heading{font-size:11px;padding:0 20px 8px;color:#626b80}.group-rates-heading span{font-size:9px;color:#979eaf;margin-left:8px}.group-rates{display:grid;grid-template-columns:repeat(6,minmax(0,1fr));gap:8px;margin:0 20px 14px}.group-rates article{border:1px solid var(--line);border-radius:6px;padding:8px}.group-rates span{display:block;font-size:9px;white-space:nowrap}.group-rates strong{font-size:17px;font-weight:550;display:block;margin:3px 0}.group-rates small{font-size:8px;color:#9da3b2}.advanced-fields{margin-bottom:20px;border-top:1px solid var(--line);padding-top:10px}.advanced-fields summary{font-size:11px;color:var(--accent);cursor:pointer;margin-bottom:16px}input:disabled{opacity:.55}.fixed-count-note{font-size:9px;color:#969daf;margin:4px 0 12px}
@media(max-width:1100px){.group-rates{grid-template-columns:repeat(3,minmax(0,1fr))}.model-picker button{padding:10px}}
@media(max-width:760px){.model-picker{grid-template-columns:repeat(2,minmax(0,1fr))}.model-picker button{padding:10px 12px}.group-rates{gap:6px;margin:0 14px 14px}.group-rates article{padding:7px}.network-legend{gap:10px;padding:8px 14px}}

.workspace>*{min-width:0}.network-scroll{min-width:0;max-width:100%}@media(max-width:760px){.workspace{grid-template-columns:minmax(0,1fr)}}

.population-scale{display:flex;justify-content:space-between;gap:12px;margin:0 20px 8px}.population-scale select{min-width:140px;max-width:60%}

#backend-note,#scale-note{margin:0 20px 16px;line-height:1.5}

.model-picker{grid-template-columns:repeat(auto-fit,minmax(145px,1fr))}
#equation-editor{padding:16px 20px;border-top:1px solid var(--line)}
.equation-heading{display:flex;align-items:center;justify-content:space-between}.equation-heading h3{font-size:13px}
#equation-editor .code-note{margin:0 0 14px;padding:0}#equation-editor .code-label{display:block;padding:0;margin:12px 0 6px;font-size:10px}
#equation-editor textarea,#equation-editor input{box-sizing:border-box;width:100%;border:1px solid var(--line);border-radius:6px;background:#fbfbfe;padding:10px;color:#41465f;font:11px/1.7 ui-monospace,monospace}
#equation-editor textarea{resize:vertical;min-height:75px}#equation-source{min-height:140px!important}#equation-parameters{min-height:120px!important}
#equation-editor details{font-size:10px;line-height:1.7;color:#777f93;margin-top:15px}#equation-editor summary{cursor:pointer;color:var(--accent)}.design-actions{display:flex;gap:8px;padding:8px 20px}
@media(max-width:760px){.model-picker{grid-template-columns:repeat(2,minmax(0,1fr))}}
/* Keep the existing Run/Stop controls reachable while authoring long equations. */
.editor-panel{position:relative;overflow:visible}
.run-area{position:sticky;top:0;z-index:5;background:#fff;padding-top:8px;border-radius:8px;box-shadow:0 4px 8px #1d254705}
#equation-editor textarea,#equation-editor input{scroll-margin-top:160px}

.result-context{display:flex;align-items:center;justify-content:space-between;gap:18px;background:#edf8f4;border:1px solid #cde8dc;border-radius:10px;padding:15px 18px;margin:0 0 18px;color:#376853}
.result-context strong{font-size:13px}.result-context p{font-size:11px;line-height:1.7;margin:5px 0 0}.result-context.pending{background:#fff9ed;border-color:#edd8ad;color:#795b27}
.result-context button{flex-shrink:0;border:1px solid currentColor;border-radius:6px;padding:8px 10px;color:inherit;font-size:11px}
@media(max-width:760px){.result-context{align-items:flex-start;flex-direction:column}}