:root{color-scheme:light;--ink:#183e39;--muted:#637b75;--paper:#fffefa;--line:#d7e3de;--green:#087f72;--amber:#c16c27;font-family:Inter,Segoe UI,Arial,sans-serif;font-size:14px;color:var(--ink);background:#edf2ee}
*{box-sizing:border-box}body{margin:0;height:100vh;height:100dvh;display:flex;flex-direction:column}button,input,select,textarea{font:inherit}button,.file-button{border:1px solid var(--line);border-radius:8px;background:var(--paper);color:var(--ink);padding:9px 12px;cursor:pointer;font-weight:600;min-height:38px}button:hover,.file-button:hover{background:#e8f2ec;border-color:#9bbfb2}button:disabled{opacity:.4;cursor:default}button.primary{background:var(--green);border-color:var(--green);color:white}button.primary:hover{background:#096e64}button[aria-pressed=true]{background:#e1efe7;border-color:#6b9f8c;color:#075d51}input,select,textarea{color:var(--ink);border:1px solid #b9ccc3;border-radius:7px;background:white;padding:8px;max-width:100%;min-width:0}input[type=checkbox],input[type=radio]{accent-color:var(--green);width:17px;height:17px;margin:0}input[type=range]{padding:0;accent-color:var(--green);width:100%;min-height:28px}input[type=color]{padding:3px;width:48px;height:36px}button:focus-visible,input:focus-visible,select:focus-visible,a:focus-visible,#diagram:focus-visible{outline:3px solid #d19a30;outline-offset:3px}a{color:#087269}h1,h2,h3,p{margin-top:0}h1{font-size:25px;line-height:1.15;margin-bottom:5px;letter-spacing:-.6px}h2{font-size:25px;margin-bottom:0;letter-spacing:-.5px}h3{font-size:16px;margin-bottom:12px}p{line-height:1.55}label{cursor:pointer}strong{font-variant-numeric:tabular-nums}.hint{font-size:12px;color:var(--muted);line-height:1.55}.eyebrow{font-size:10px;letter-spacing:1.7px;font-weight:750;color:var(--muted);margin-bottom:7px}.skip-link{position:fixed;left:12px;top:-100px;z-index:99;padding:10px;background:white}.skip-link:focus{top:10px}
.topbar{display:flex;align-items:center;gap:20px;padding:13px 24px;background:var(--paper);border-bottom:1px solid var(--line);flex-shrink:0}.brand{display:flex;align-items:center}.brand img{width:110px;height:auto}.studio-name{border-left:1px solid var(--line);padding-left:20px;font-size:19px;font-weight:750;letter-spacing:-.5px;white-space:nowrap}.studio-name span{display:block;font-size:8px;letter-spacing:1.4px;font-weight:600;color:var(--muted);margin-top:4px}.top-actions{display:flex;gap:7px;margin-left:auto;flex-wrap:wrap}.top-actions button{font-size:12px}.modes{display:flex;gap:4px;padding:9px 24px;background:#f5f7f3;border-bottom:1px solid var(--line);flex-shrink:0;overflow-x:auto}.modes button{background:transparent;border-color:transparent;white-space:nowrap;font-size:13px;padding:8px 14px}.modes button span{font-size:10px;opacity:.55;margin-right:7px}.modes button[aria-pressed=true]{background:#153f39;color:#fff;border-color:#153f39}.workspace{flex:1;min-height:0;padding:20px 24px 18px;display:flex;flex-direction:column;gap:16px}.workspace-heading{display:flex;justify-content:space-between;align-items:center;gap:16px;flex-shrink:0}#purpose{margin:0;color:var(--muted);font-size:13px}.history-actions{display:flex;gap:6px;flex-wrap:wrap;justify-content:flex-end}.history-actions button{font-size:12px}.workbench{display:grid;grid-template-columns:minmax(0,1fr) 310px;gap:18px;flex:1;min-height:0}.diagram-card{border:1px solid var(--line);border-radius:14px;background:var(--paper);display:flex;flex-direction:column;min-height:0;overflow:hidden;box-shadow:0 3px 14px #153f3904}.diagram-topline{display:flex;justify-content:space-between;gap:12px;padding:15px 20px 5px;font-size:10px;letter-spacing:1.1px;font-weight:700;flex-shrink:0}.balance{letter-spacing:0;color:var(--green);font-weight:650}.balance.invalid{color:#a24132}.diagram-scroll{flex:1;min-height:180px;overflow:auto;overscroll-behavior:contain;display:flex;flex-direction:column}#diagram,#compare-diagram{min-height:0;flex:1;display:flex;align-items:center;justify-content:center;position:relative}#diagram svg,#compare-diagram svg{display:block;width:100%;height:100%;min-height:180px;touch-action:pan-x pan-y}#diagram [data-handle]{touch-action:none}.diagram-note{font-size:11px;color:var(--muted);padding:5px 20px 12px;text-align:center;line-height:1.4;flex-shrink:0}.account-strip{border-top:1px solid var(--line);margin:0 20px;padding:13px 0;display:flex;align-items:center;gap:18px;flex-shrink:0}.account-strip>div{flex:1}.account-strip>div>span{display:block;font-size:10px;text-transform:uppercase;letter-spacing:.8px;color:var(--muted);margin-bottom:5px}.account-strip strong{font-size:23px;letter-spacing:-.6px}.account-strip #stat-useful{color:var(--green)}.account-strip #stat-unwanted{color:var(--amber)}.math-sign{color:#84968d;font-size:18px}.efficiency-stat{border-left:1px solid var(--line);padding-left:18px}.efficiency-stat button{font-size:12px;min-height:28px;padding:4px 10px}.diagram-toolbar{display:flex;align-items:center;gap:15px;padding:11px 20px;background:#f5f7f2;border-top:1px solid var(--line);font-size:12px;flex-wrap:wrap;flex-shrink:0}.diagram-toolbar label{display:flex;align-items:center;gap:6px}.scale-control{margin-left:auto}.scale-control input{width:70px;padding:4px 7px;min-height:28px}.mode-tools{min-height:0;overflow-y:auto;overscroll-behavior:contain;padding:2px 3px 20px 0;scrollbar-width:thin}.panel-section{padding:17px 18px;background:var(--paper);border:1px solid var(--line);border-radius:12px;margin-bottom:12px}.panel-section>p:last-child{margin-bottom:0}.panel-section p{font-size:13px}.panel-section .eyebrow{font-size:10px}.panel-section .question{font-size:19px;line-height:1.35;letter-spacing:-.4px;margin-bottom:12px}.field{display:flex;flex-direction:column;gap:6px;margin-bottom:13px;font-size:12px;font-weight:600}.field:last-child{margin-bottom:0}.field input,.field select,.field textarea{width:100%;font-size:14px;font-weight:400}.field textarea{resize:vertical;min-height:60px}.field .hint{font-weight:400}.field-row{display:flex;gap:9px}.field-row>.field{flex:1;min-width:0}.field-row>.field.small{flex:.45}.button-row{display:flex;gap:7px;flex-wrap:wrap}.button-row button{flex:1;font-size:12px}.divider{height:1px;background:var(--line);margin:16px 0}.number-line{display:flex;align-items:center;gap:8px}.number-line input[type=number]{width:90px}.number-line input[type=range]{flex:1}.callout{padding:12px 14px;border-left:3px solid var(--green);background:#edf5ed;color:#315c4e;font-size:12px;line-height:1.6;border-radius:0 6px 6px 0}.feedback{margin-top:12px;line-height:1.5;font-size:13px}.feedback:empty{display:none}.feedback.success{color:#07674d}.feedback.error{color:#a13b31}.feedback ul{padding-left:18px;margin:6px 0}.step-track{display:flex;gap:4px;margin:15px 0}.step-track span{height:5px;border-radius:4px;flex:1;background:#dce7dd}.step-track span.done{background:var(--green)}.step-instruction{min-height:62px}.output-editor{border-top:1px solid var(--line);padding-top:15px;margin-top:16px}.output-editor h4{display:flex;align-items:center;justify-content:space-between;margin:0 0 12px}.output-editor h4 button{padding:4px 7px;min-height:27px;font-size:11px}.check-row{display:flex;align-items:center;gap:7px;font-size:12px;margin-bottom:10px}.working{font-size:14px;line-height:1.7}.working>div{border-top:1px solid var(--line);padding:9px 0}.working strong{font-size:22px}.compare-caption{position:absolute;left:16px;top:7px;font-size:11px;color:var(--muted);z-index:1;font-weight:700}.choice{display:flex;gap:10px;padding:10px;border:1px solid var(--line);border-radius:8px;margin:8px 0;align-items:flex-start;font-size:13px;line-height:1.4}.choice input{flex-shrink:0;margin-top:1px}.question-count{font-size:11px;color:var(--muted);margin-bottom:12px}.badge{display:inline-block;border-radius:30px;background:#e9f2eb;padding:4px 8px;font-size:10px;color:#446d5d}#controls-toggle{display:none}.present .workbench{grid-template-columns:minmax(0,1fr)}.present .mode-tools{display:none}.present #controls-toggle{display:block}.present .account-strip strong{font-size:29px}.present.controls-open .workbench{grid-template-columns:minmax(0,1fr) 310px}.present.controls-open .mode-tools{display:block}
dialog{border:1px solid var(--line);border-radius:16px;padding:0;background:var(--paper);color:var(--ink);max-width:min(830px,94vw);width:830px;max-height:88dvh;box-shadow:0 30px 100px #143e3933}dialog::backdrop{background:#0c2a2670;backdrop-filter:blur(3px)}dialog>header{position:sticky;top:0;display:flex;align-items:center;justify-content:space-between;gap:15px;background:var(--paper);border-bottom:1px solid var(--line);padding:22px 26px;z-index:2}dialog .dialog-intro{padding:18px 26px 0;color:var(--muted);font-size:13px}.example-cards{padding:0 26px 26px;display:grid;grid-template-columns:1fr 1fr;gap:12px}.example-card{padding:18px;text-align:left;display:flex;flex-direction:column;gap:8px;align-items:flex-start;min-height:125px}.example-card strong{font-size:16px}.example-card span{font-size:12px;line-height:1.4;font-weight:400;color:var(--muted)}.example-card small{font-size:10px;letter-spacing:.5px;color:var(--green)}.notes-content,.export-content{padding:24px 26px}.notes-content h3:not(:first-child),.export-content h3:not(:first-child){margin-top:25px}.notes-content p,.notes-content li{font-size:14px;line-height:1.65}.notes-content ol{padding-left:20px}.button-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-bottom:12px}.file-button{display:block;text-align:center}.file-button input{display:block;width:100%;font-size:10px;margin-top:8px}#export-status{font-size:13px;color:var(--green)}#toast{position:fixed;bottom:20px;left:50%;transform:translateX(-50%);max-width:min(620px,90vw);background:#153f39;color:white;padding:12px 18px;border-radius:9px;box-shadow:0 5px 20px #0002;z-index:20;font-size:13px;line-height:1.4;pointer-events:none;opacity:0;transition:opacity .15s}#toast.visible{opacity:1}[hidden]{display:none!important}
@media(min-width:1700px){:root{font-size:16px}.workbench{grid-template-columns:minmax(0,1fr) 365px}.panel-section p{font-size:15px}.panel-section .question{font-size:23px}.topbar{padding:18px 30px}.workspace{padding:25px 30px}.account-strip strong{font-size:30px}.diagram-toolbar{font-size:14px}}
@media(max-height:760px) and (min-width:901px){.topbar{padding:8px 20px}.modes{padding:5px 20px}.workspace{padding:12px 20px;gap:10px}h1{font-size:21px}.workspace-heading .eyebrow{margin-bottom:4px}.account-strip{padding:9px 0}.account-strip strong{font-size:20px}.diagram-topline{padding-top:10px}.diagram-note{padding-bottom:6px}.diagram-toolbar{padding-top:8px;padding-bottom:8px}}
@media(max-width:1100px){.topbar{gap:12px;padding-left:16px;padding-right:16px}.studio-name{font-size:17px;padding-left:12px}.top-actions button{padding:7px 9px}.top-actions [data-dialog=notes-dialog]{display:none}.workbench{grid-template-columns:minmax(0,1fr) 285px;gap:12px}.workspace{padding:15px}.modes{padding-left:15px;padding-right:15px}.modes button{padding:8px 10px}.account-strip{gap:9px;margin:0 14px}.account-strip strong{font-size:20px}.efficiency-stat{padding-left:12px}.diagram-toolbar{padding:10px 14px;gap:10px}.scale-control{margin-left:0}.diagram-topline{padding-left:14px;padding-right:14px}.history-actions #reset{display:none}}
@media(max-width:900px){.topbar{flex-wrap:wrap;gap:8px 12px;padding:9px 12px}.brand img{width:85px}.studio-name{font-size:17px}.studio-name span{font-size:7px}.top-actions{gap:5px}.top-actions button{font-size:11px;min-height:33px}.modes{padding:5px 10px}.modes button{font-size:12px;min-height:34px}.workspace{padding:12px;gap:10px}.workspace-heading{align-items:flex-start}.workspace-heading h1{font-size:22px}.workspace-heading .eyebrow{font-size:9px}.history-actions{max-width:170px}.history-actions button{min-height:32px;padding:6px 8px}#controls-toggle{display:block}.workbench,.present.controls-open .workbench{display:block;position:relative}.diagram-card{height:100%}.mode-tools{display:none;position:absolute;z-index:5;right:0;top:0;bottom:0;width:320px;max-width:95%;background:#edf2ee;padding:12px;border:1px solid var(--line);border-radius:12px;box-shadow:0 10px 40px #153f3926}.controls-open .mode-tools{display:block}.present .mode-tools{display:none}.present.controls-open .mode-tools{display:block}.diagram-scroll #diagram,.diagram-scroll #compare-diagram{min-width:760px}.diagram-toolbar{gap:9px;font-size:11px}.account-strip strong{font-size:21px}.diagram-note{font-size:10px}.top-actions [data-dialog=notes-dialog]{display:inline-block}}
@media(max-width:580px){.topbar .top-actions{width:100%;margin:0;justify-content:space-between}.top-actions [data-dialog=notes-dialog]{display:inline-block}.modes button span{display:none}.workspace-heading{gap:8px}.workspace-heading h1{font-size:19px}.workspace-heading #purpose{font-size:11px;max-width:230px}.history-actions{gap:4px;max-width:113px}.history-actions button{font-size:10px}.history-actions #undo,.history-actions #redo{min-width:51px}.diagram-topline{font-size:8px;padding:10px 12px 2px}.account-strip{margin:0 11px;gap:7px;padding:9px 0}.account-strip strong{font-size:17px}.account-strip>div>span{font-size:8px;letter-spacing:0}.account-strip .math-sign{font-size:14px}.efficiency-stat{padding-left:9px}.efficiency-stat button{font-size:10px}.diagram-toolbar{padding:9px 11px;gap:8px 12px}.diagram-toolbar input[type=checkbox]{width:15px;height:15px}.scale-control input{width:64px}.diagram-note{padding:5px 12px}.example-cards,.button-grid{grid-template-columns:1fr}dialog>header{padding:17px}dialog h2{font-size:21px}.example-cards,.notes-content,.export-content{padding:17px}dialog{max-height:93dvh}.dialog-intro{padding:15px 17px 0!important}}
@media(max-height:500px){body{height:auto;min-height:100dvh}.workspace{min-height:590px}.topbar{padding:7px 12px}.studio-name span{display:none}.workbench{min-height:420px}.mode-tools{max-height:440px}.modes{padding-top:3px;padding-bottom:3px}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}
@media print{body{height:auto;background:white}.topbar,.modes,.workspace-heading,.mode-tools,.diagram-toolbar,.history-actions,.diagram-note,#toast,dialog{display:none!important}.workspace{display:block;padding:0}.workbench{display:block}.diagram-card{border:0;box-shadow:none;overflow:visible}.diagram-scroll{overflow:visible;display:block}.diagram-scroll #diagram{min-width:0;display:block;height:auto}#diagram svg{width:100%;height:auto;min-height:0}.account-strip{display:none}.diagram-topline{margin-bottom:10px}#compare-diagram{display:none!important}@page{size:A4 landscape;margin:12mm}}
.comparison-table{width:100%;border-collapse:collapse;font-size:12px;margin:12px 0}.comparison-table caption{text-align:left;font-size:10px;letter-spacing:.3px;color:var(--muted);padding-bottom:8px}.comparison-table th,.comparison-table td{padding:8px 4px;text-align:right;border-bottom:1px solid var(--line)}.comparison-table th:first-child{text-align:left}.comparison-table td{font-variant-numeric:tabular-nums}.label-movement{margin:10px 0}.label-movement .button-row{margin-top:5px;gap:4px}.label-movement button{padding:4px 7px;min-height:30px}.panel-section #new-account{font-size:11px;float:right;margin:-5px -6px 6px 8px}.efficiency-stat button{margin-right:5px}.comparing .diagram-scroll{flex-direction:row;min-height:180px}.comparing #diagram,.comparing #compare-diagram{min-height:0;min-width:0;width:50%;align-self:stretch;flex-direction:column;justify-content:flex-start}.comparing #compare-diagram{border:0;box-shadow:inset 1px 0 #b8cdc1}.comparing #diagram svg,.comparing #compare-diagram svg{min-height:0;height:0;flex:1}.comparing .diagram-scroll .compare-caption{position:static;flex-shrink:0;align-self:stretch;padding:10px 12px 3px;font-size:12px;line-height:1.3}.comparing .diagram-topline{flex-wrap:wrap}
@media(max-width:900px){.comparing #diagram,.comparing #compare-diagram{min-width:510px;width:510px;min-height:340px;flex-shrink:0}.comparing .diagram-scroll{overflow:auto}}
@media print{.workspace-heading{display:block!important}.workspace-heading .eyebrow{display:none}.workspace-heading h1{font-size:22px}#purpose{margin-bottom:12px}.history-actions{display:none!important}}
.width-handle{display:flex;align-items:center;justify-content:center;width:64px;height:64px;min-height:0;padding:0;margin:0;border:0;border-radius:0;background:transparent!important;touch-action:none;user-select:none;outline-offset:-12px}.width-handle span{display:flex;align-items:center;justify-content:center;width:26px;height:26px;border:3px solid #294c5b;border-radius:50%;background:#fffefa;color:#294c5b;font:700 27px/1 Arial;pointer-events:none}.width-handle:hover span{background:#e1efe7}
.workspace-heading>div:first-child{min-width:0}.workspace-heading h1,#purpose{overflow-wrap:anywhere}
.controls-header,#diagram-fit{display:none}
.account-strip>div{min-width:0}.account-strip strong{overflow-wrap:anywhere}
@media(max-width:900px){
  .controls-header{display:flex;align-items:center;justify-content:space-between;gap:8px;position:sticky;top:-12px;z-index:2;background:#edf2ee;padding:8px 0 12px;font-size:12px}
  .controls-header button{font-size:11px;min-height:40px}
  .mode-tools input:not([type=checkbox]):not([type=radio]):not([type=range]):not([type=color]),.mode-tools select,.mode-tools textarea{font-size:16px}
}
@media(max-width:600px){
  body{height:auto;min-height:100dvh}.workspace{flex:none;min-height:0}.workbench{min-height:0}.diagram-card{height:auto}
  .topbar{position:relative}.top-actions #fullscreen{position:absolute;top:7px;right:12px;width:32px;min-height:32px;padding:0}
  .wide-label{display:none}.top-actions button{min-height:38px;padding:7px 8px}.top-actions [data-dialog=notes-dialog]{text-transform:capitalize}
  .studio-name span{display:none}.workspace-heading{flex-wrap:wrap}.workspace-heading>div:first-child{width:100%}.workspace-heading #purpose{max-width:none}
  .history-actions{max-width:none;width:100%;justify-content:flex-end}.history-actions #reset{display:block;margin-right:auto}.history-actions button{min-height:36px}
  .diagram-scroll{flex:none;height:340px}.diagram-scroll #diagram,.diagram-scroll #compare-diagram{flex:none;height:340px}
  .diagram-toolbar input[type=number]{font-size:16px}.diagram-toolbar label{min-height:32px}.diagram-toolbar{gap:4px 12px}.scale-control{margin-left:auto}
  #diagram-fit{display:block;width:100%;min-height:40px;margin-bottom:4px}
  .mode-tools{position:fixed;top:12px;bottom:12px;right:12px;width:calc(100% - 24px);max-width:420px;max-height:none;z-index:10;box-shadow:0 0 0 100vmax #102c2859,0 10px 40px #153f3926}
  .present .account-strip strong{font-size:20px}.account-strip{flex-wrap:wrap}.efficiency-stat{min-width:80px}.account-strip strong{font-size:16px}
  .mobile-overview .diagram-scroll{height:auto;overflow:visible;display:block}
  .mobile-overview .diagram-scroll #diagram,.mobile-overview .diagram-scroll #compare-diagram{display:flex;flex-direction:column;min-width:0;width:100%;height:auto;min-height:0}
  .mobile-overview #diagram svg,.mobile-overview #compare-diagram svg{height:auto;width:100%;flex:none;min-height:0}
  .mobile-overview.comparing #compare-diagram{box-shadow:none;border-top:1px solid var(--line);margin-top:10px}
  .mobile-legend{list-style:none;padding:0 14px;margin:0;width:100%;font-size:13px;line-height:1.4}
  .mobile-legend li{display:flex;align-items:center;gap:9px;border-top:1px solid var(--line);padding:9px 0}
  .mobile-legend li>span:nth-last-child(2){flex:1;min-width:0;overflow-wrap:anywhere}.mobile-legend strong{font-size:15px;max-width:35%;overflow-wrap:anywhere}
  .mobile-legend small{display:block;color:var(--muted);font-size:11px}.branch-key{border:1.5px solid;border-radius:50%;width:24px;height:24px;display:grid;place-items:center;font-weight:700;flex:none}
  .mobile-legend .legend-input{font-size:12px}.mobile-legend .legend-input>span{flex:1}
}
@media print{.controls-header,#diagram-fit,.mobile-legend{display:none!important}.diagram-scroll,.diagram-scroll #diagram{height:auto!important;min-height:0!important;min-width:0!important}.workspace{min-height:0}.workbench{min-height:0}}