:root{color-scheme:dark;--bg:#111821;--panel:#18222e;--line:#2a394a;--text:#e4eaf2;--muted:#94a6ba;--accent:#63dcc0;--blue:#82b8ff;--danger:#ff9292;--bottom:310px;font-family:"Segoe UI",sans-serif;font-size:13px}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);height:100vh;display:flex;flex-direction:column;overflow:hidden}button,input,select{font:inherit}button{border:1px solid var(--line);border-radius:6px;background:#202d3b;color:var(--text);padding:8px 12px;cursor:pointer;white-space:nowrap}button:hover{background:#2a3b4d;border-color:#526d88}button:disabled{opacity:.4;cursor:default}button:focus-visible,input:focus-visible,select:focus-visible,svg:focus-visible{outline:2px solid var(--accent);outline-offset:2px}button.primary{background:var(--accent);border-color:var(--accent);color:#102d28;font-weight:650}button.primary:hover{background:#8be9d3}button.secondary{border-color:#527990;color:#b9dbe9}button.quiet{background:transparent;color:var(--muted);white-space:normal}.topbar{height:74px;flex-shrink:0;display:flex;align-items:center;gap:28px;padding:0 22px;border-bottom:1px solid var(--line);background:#151f2a}.brand{display:flex;align-items:center;gap:11px;min-width:238px}.brand-icon{display:block;width:37px;height:37px;object-fit:contain;flex-shrink:0}.brand strong{display:block;letter-spacing:.5px;font-size:19px}.brand small{display:block;font-size:11px;color:var(--muted);margin-top:3px}.topbar nav,.run-actions{display:flex;align-items:center;gap:8px}.run-actions{margin-left:auto}.divider{height:22px;border-left:1px solid var(--line);margin:0 4px}main{display:flex;flex-direction:column;flex:1;min-height:0}.workspace{display:grid;grid-template-columns:166px minmax(250px,1fr) 260px;flex:1;min-height:180px}.palette,.inspector{background:var(--panel);padding:19px 15px;overflow:auto}.palette{border-right:1px solid var(--line)}h2{font-size:13px;font-weight:650;margin:0 0 15px}.eyebrow{font-size:9px;color:var(--muted);letter-spacing:1.1px;margin:0 0 14px}.palette-item{display:flex;align-items:center;text-align:left;width:100%;padding:10px 7px;margin:0 0 6px;background:#1c2937;border-color:#2a394a;gap:10px}.palette-symbol{font-family:Consolas,monospace;font-weight:bold;font-size:19px;color:var(--accent);width:30px;text-align:center}.palette-item small{display:block;color:var(--muted);font-size:10px;margin-top:3px}.palette-note{margin:23px 0;color:var(--muted);font-size:11px;line-height:1.6;border-top:1px solid var(--line);padding-top:16px}.palette-note strong{font-weight:500;color:#bdcddd}.palette-note p{margin:5px 0}.canvas-panel{position:relative;overflow:hidden;background:#111c27;min-width:0;display:flex;flex-direction:column}.canvas-bar{height:43px;display:flex;align-items:center;justify-content:space-between;padding:0 20px;background:#141f2b;border-bottom:1px solid #223142;z-index:1;gap:10px}.canvas-bar strong{font-weight:500;font-size:12px}.canvas-bar>span:last-child{font-size:10px;color:var(--muted)}.live-dot{display:inline-block;width:6px;height:6px;background:var(--accent);border-radius:50%;margin-right:6px}.canvas-tools{position:absolute;top:57px;left:15px;display:flex;align-items:center;gap:5px;z-index:2}.canvas-tools button{font-size:11px;padding:6px 9px;background:#1c2a39}.canvas-tools button[aria-pressed=true]{border-color:var(--accent);color:var(--accent)}kbd{font:10px Consolas,monospace;color:#8eacba;margin-left:7px}#zoom-label{font-size:10px;min-width:37px;text-align:center;color:var(--muted)}#stage{flex:1;width:100%;min-height:0;touch-action:none;user-select:none}#stage.connecting{cursor:crosshair}.canvas-footer{display:flex;justify-content:space-between;gap:10px;padding:8px 15px;font-size:9px;color:#8da2b7;background:#141f2b;border-top:1px solid #223142}.empty-hint{pointer-events:none;position:absolute;top:44%;width:100%;text-align:center;color:var(--muted)}.empty-hint strong,.empty-hint span{display:block}.empty-hint strong{font-size:17px;font-weight:500;color:#c0d0df;margin-bottom:13px}.empty-hint span{line-height:1.9;font-size:12px}.node{cursor:grab}.node:active{cursor:grabbing}.node-body{fill:#203140;stroke:#7895ad;stroke-width:1.5}.node.junction .node-body{fill:#1b303a;stroke:#6cacaa}.node.source .node-body{fill:#26334a;stroke:#8aade0}.node.selected .node-body{stroke:var(--accent);stroke-width:2.5;filter:drop-shadow(0 0 4px #63dcc033)}.node.error .node-body{stroke:var(--danger);stroke-width:2.5}.node text{pointer-events:none;fill:#e7eff5;font-family:Consolas,monospace}.node .symbol{font-size:22px;font-weight:600}.node .node-label{font-size:11px;fill:#a7bdcf}.node .node-value{font-size:9px;fill:#7f9bae}.port{fill:#152332;stroke:#81b9b9;stroke-width:1.5;cursor:crosshair}.port:hover{fill:var(--accent);stroke:var(--accent)}.bond{cursor:pointer}.bond-line,.causal-stroke,.harpoon{stroke:var(--domain-hydraulic);fill:none;stroke-width:1.6}.bond.selected .bond-line,.bond.selected .causal-stroke,.bond.selected .harpoon{stroke:var(--accent);stroke-width:2.6}.bond.error .bond-line{stroke:var(--danger);stroke-width:2.5}.bond-hit{stroke:transparent;stroke-width:16;fill:none}.bond-label{fill:#7d99af;font-size:10px;paint-order:stroke;stroke:#111c27;stroke-width:4px}.port-sign{fill:#83bcbb;font:11px Consolas,monospace;paint-order:stroke;stroke:#111c27;stroke-width:3px}.preview-line{stroke:var(--accent);stroke-dasharray:5 5;stroke-width:1.5;pointer-events:none}.inspector{border-left:1px solid var(--line);padding:18px}.inspector-heading{display:flex;align-items:baseline;justify-content:space-between;gap:5px}.icon-button{padding:4px 6px;font-size:10px;background:transparent;color:var(--muted)}label{display:block;color:#afc0d2;font-size:11px;margin:0 0 13px}input,select{display:block;width:100%;background:#101b27;border:1px solid #344558;border-radius:5px;color:var(--text);padding:8px 9px;margin-top:6px;min-width:0}input:invalid{border-color:var(--danger)}input[type=checkbox]{display:inline;width:auto;margin:0;accent-color:var(--accent)}.muted{color:var(--muted);line-height:1.7}.small{font-size:10px}.property-type{display:flex;align-items:center;gap:10px;margin:3px 0 19px}.property-type strong{color:var(--accent);font:24px Consolas,monospace}.property-type span{color:var(--muted);font-size:11px}.property-id{font-family:Consolas,monospace;font-size:10px;margin:-6px 0 15px;color:#768fa5}.settings{border-top:1px solid var(--line);padding-top:19px;margin-top:24px}.settings h2{margin-bottom:17px}.output-panel{height:var(--bottom);flex-shrink:0;border-top:1px solid #344557;display:flex;flex-direction:column;min-height:44px;background:#141e2a}.output-panel.collapsed{height:44px}.output-panel.collapsed .tab-panel{display:none}.output-bar{display:flex;align-items:center;gap:12px;height:44px;flex-shrink:0;padding:0 14px;border-bottom:1px solid var(--line)}.output-bar [role=tablist]{display:flex;height:100%;gap:16px}.tab{background:none;border:none;border-bottom:2px solid transparent;border-radius:0;padding:0 3px;font-size:12px;color:var(--muted)}.tab.active{color:var(--accent);border-bottom-color:var(--accent)}.output-bar #export-csv{font-size:10px;padding:5px 9px}.badge{font-size:10px;padding:4px 8px;border:1px solid #344557;border-radius:4px;color:var(--muted);margin-left:auto}.badge.stale{color:#f5c278;border-color:#6b5336}.badge.fresh{color:var(--accent);border-color:#35635d}#toggle-output{background:none;border:none;padding:5px;color:var(--muted)}#diagnostic-count{font-size:9px;display:inline-block;background:#263748;border-radius:4px;padding:1px 5px;margin-left:4px}.tab-panel{flex:1;min-height:0;overflow:auto}.placeholder{height:100%;min-height:150px;display:flex;align-items:center;justify-content:center;flex-direction:column;text-align:center;color:var(--muted);font-size:12px;line-height:1.7}.placeholder strong{font-weight:500;color:#c6d5e3}.placeholder p{margin:8px}.placeholder-icon{font:42px Georgia;color:#568b94;line-height:1.4}#result-content{display:grid;grid-template-columns:225px 1fr;height:100%;min-height:190px}#series-picker{padding:12px 15px;overflow:auto;border-right:1px solid var(--line)}.series-group{color:#b7c9d8;font-size:10px;font-weight:600;margin:10px 0}.series-option{display:flex;align-items:center;gap:8px;font-size:10px;margin:9px 0;cursor:pointer}.series-option span{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}#charts{overflow:auto;padding:10px 18px;min-width:0}.chart{background:#172431;border:1px solid #2a3a4c;border-radius:6px;padding:8px 10px;margin-bottom:10px}.chart-header{display:flex;gap:14px;align-items:baseline;flex-wrap:wrap;font-size:10px;color:var(--muted)}.chart-header strong{font-size:11px;color:#c4d5e4;font-weight:500}.chart-legend{display:flex;gap:15px;flex-wrap:wrap}.chart svg{display:block;width:100%;height:172px;overflow:visible}.chart .axis-text{fill:#8ba1b6;font:10px Consolas,monospace}.chart .grid-line{stroke:#2b3a4b;stroke-width:1}.chart .cursor-line{stroke:#b1c4d7;stroke-dasharray:3 3}.chart-tooltip{font:10px Consolas,monospace;color:#bfcede;min-height:17px;padding-top:3px}.equation-wrap{padding:16px 22px;font-size:12px}.equation-wrap h3{font-size:12px;color:var(--accent);margin:15px 0 10px}.equation-wrap pre{font:12px/1.8 Consolas,monospace;white-space:pre-wrap;overflow-wrap:anywhere;margin:0}.equation-row{display:flex;gap:18px;padding:5px 0;border-bottom:1px solid #22303f}.equation-row b{width:90px;flex-shrink:0;color:#8dadc5;font-size:11px}.equation-row code{font:11px Consolas,monospace;white-space:pre-wrap;overflow-wrap:anywhere}.diagnostic-list{padding:16px 22px}.diagnostic{display:block;width:100%;text-align:left;margin-bottom:8px;white-space:normal;padding:12px;border-left:3px solid var(--danger);font-size:12px;line-height:1.6}.diagnostic.warning{border-left-color:#f5c278}.diagnostic small{display:block;color:var(--muted);font-family:Consolas,monospace}.diagnostic-ok{color:var(--accent);padding:24px}.statusbar{height:27px;flex-shrink:0;display:flex;align-items:center;justify-content:space-between;padding:0 17px;background:#101720;border-top:1px solid #263344;color:#8da4b9;font-size:10px;gap:10px}#status{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.statusbar>span:last-child{white-space:nowrap}dialog{max-width:660px;max-height:85vh;overflow:auto;background:var(--panel);border:1px solid #496278;border-radius:12px;color:var(--text);padding:27px;font-size:13px;line-height:1.8}dialog::backdrop{background:#071019bb}dialog li{margin-bottom:8px}dialog p{color:var(--muted)}[hidden]{display:none!important}@media(max-width:1100px){.topbar{gap:12px;padding:0 12px}.brand{min-width:150px}.brand small{display:none}.topbar nav{gap:4px}.topbar button{font-size:11px;padding:7px 8px}.workspace{grid-template-columns:135px minmax(230px,1fr) 225px}.palette{padding:16px 10px}.palette-item{gap:3px;font-size:11px}.canvas-footer>span:last-child{display:none}}@media(max-height:800px){:root{--bottom:255px}.topbar{height:60px}.palette-item{padding:7px}.palette-note{margin:13px 0}.palette{padding-top:14px}}@media(max-width:800px){.topbar{height:auto;min-height:65px;flex-wrap:wrap;padding:8px;gap:6px}.brand{min-width:115px}.topbar nav{order:3;width:100%}.workspace{grid-template-columns:96px minmax(200px,1fr) 195px}.palette-item{justify-content:center;padding:8px 3px}.palette-item>span:last-child,.eyebrow,.palette-note{display:none}.palette-symbol{width:auto}.inspector{padding:10px}.canvas-bar{padding:0 10px}.canvas-bar>span:last-child{display:none}.canvas-footer{font-size:8px}.output-bar{gap:6px}.output-bar [role=tablist]{gap:10px}#result-content{grid-template-columns:175px 1fr}.brand-icon{width:30px;height:30px}.brand strong{font-size:16px}}

/* Domain labels share the normal bond-line colors, including the selected value. */
:root{--domain-hydraulic:#8aaabe;--domain-mechanical:#f5c278;--domain-rotational:#8bd6a4;--domain-electrical:#c5a1ff;--domain-signal:#f5a9cf}
:is(#library-domain,#example-select) option{background:#101b27;color:var(--text)}
:is(#library-domain,#example-select) option[data-domain="hydraulic"],:is(#library-domain,#example-select):has(option[data-domain="hydraulic"]:checked){color:var(--domain-hydraulic)}
:is(#library-domain,#example-select) option[data-domain="mechanical"],:is(#library-domain,#example-select):has(option[data-domain="mechanical"]:checked){color:var(--domain-mechanical)}
:is(#library-domain,#example-select) option[data-domain="rotational"],:is(#library-domain,#example-select):has(option[data-domain="rotational"]:checked){color:var(--domain-rotational)}
:is(#library-domain,#example-select) option[data-domain="electrical"],:is(#library-domain,#example-select):has(option[data-domain="electrical"]:checked){color:var(--domain-electrical)}
:is(#library-domain,#example-select) option[data-domain="signal"],:is(#library-domain,#example-select):has(option[data-domain="signal"]:checked){color:var(--domain-signal)}

/* Named energy ports and hydraulic library. */
.workspace{grid-template-columns:185px minmax(250px,1fr) 320px}
.palette-item{white-space:normal;font-size:11px;gap:6px}.palette-symbol{font-size:16px;width:38px;flex-shrink:0}.palette-group{color:var(--muted);font-size:10px;margin:18px 0 8px}
.topbar{gap:14px}.topbar nav{min-width:0}.brand{min-width:150px}#example-select{max-width:220px;margin:0;font-size:11px}.topbar button{padding:7px 9px}
.bond.mechanical .bond-line,.bond.mechanical .harpoon,.bond.mechanical .causal-stroke{stroke:var(--domain-mechanical)}.bond.mechanical .bond-line{stroke-dasharray:7 3}
.bond.rotational .bond-line,.bond.rotational .harpoon,.bond.rotational .causal-stroke{stroke:var(--domain-rotational)}.port.rotational{stroke:var(--domain-rotational);fill:#294936}
.bond.electrical .bond-line,.bond.electrical .harpoon,.bond.electrical .causal-stroke{stroke:var(--domain-electrical)}.port.electrical{stroke:#c5a1ff;fill:#352b49}
.port.mechanical{stroke:#f5c278;fill:#493b29}.port.error{stroke:#ff9292;fill:#ff9292;stroke-width:4}.node .port-name{font:11px Consolas,monospace;fill:#d1e3ef}.node .symbol{font-size:20px}
.property-type{overflow-wrap:anywhere}.property-type strong{font-size:18px}.inspector h3{font-size:12px;margin:16px 0 8px}.inspector details{margin:12px 0}.inspector summary{cursor:pointer;color:var(--accent);font-size:11px}.inspector pre{white-space:pre-wrap;overflow-wrap:anywhere;font-size:10px;max-height:260px;overflow:auto}
.schedule-row,.curve-row{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.15fr) 23px;gap:6px;align-items:center}.schedule-row input,.curve-row input,.schedule-row select{padding:7px 4px;font-size:11px}.schedule-row button,.curve-row button{padding:4px}.schedule-row label,.curve-row label{margin-bottom:6px}
.pump-curve{border:1px solid var(--line);border-radius:6px;margin:10px 0;padding:8px;background:#172431}.pump-curve svg{display:block;width:100%;height:auto}.pump-curve .axis-text{fill:#94a6ba;font:9px Consolas,monospace}.pump-curve .grid-line{stroke:#344558;stroke-width:1}.pump-curve p{margin:4px 0}
.chart-area{min-width:0;overflow:auto;padding:8px 12px}#charts{overflow:visible;padding:4px 0}#operating-points{display:flex;gap:10px;flex-wrap:wrap}#operating-points .pump-curve{width:310px;margin:4px 0}.time-control{max-width:420px;margin:4px 0 8px}#result-time{padding:0}.chart-area #termination-banner{border:1px solid #c47d39;background:#453023;color:#ffe0ac;border-radius:6px;padding:10px;margin-bottom:10px;font-size:12px}
#internal-dialog{width:740px;max-width:90vw}#internal-content svg{width:100%;height:auto}.badge{max-width:320px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
@media(max-width:1200px){.workspace{grid-template-columns:150px minmax(240px,1fr) 280px}.brand small{display:none}.brand{min-width:105px}.topbar{gap:8px;padding:0 10px}#example-select{max-width:155px}.topbar button{font-size:11px;padding:7px}.topbar nav{gap:5px}}
@media(max-width:950px){.topbar{height:auto;min-height:72px;flex-wrap:wrap;padding:8px}.topbar nav{order:3;width:100%}#example-select{max-width:240px}.workspace{grid-template-columns:100px minmax(200px,1fr) 250px}.palette-item>span:last-child{display:none}.palette-item{justify-content:center}.palette-group{font-size:9px}.brand{min-width:130px}.brand small{display:block}}

.palette{overflow-x:hidden}.palette-group{overflow-wrap:anywhere}.operating-panel{margin:5px 0 12px}.operating-panel>summary{color:var(--accent);cursor:pointer;font-size:11px}
.documentation-link{display:inline-flex;align-items:center;padding:7px 9px;border:1px solid #527990;border-radius:6px;background:#202d3b;color:var(--accent);font:inherit;white-space:nowrap;text-decoration:none}.documentation-link:hover{background:#2a3b4d;border-color:var(--accent)}.documentation-link:focus-visible{outline:2px solid var(--accent);outline-offset:3px}.run-actions{flex-shrink:0}
@media(max-width:1200px){.documentation-link{font-size:11px;padding:7px}}

/* Vertical category tabs keep the library compact beside the canvas. */
.workspace{grid-template-columns:230px minmax(250px,1fr) 320px;grid-template-rows:minmax(180px,1fr) auto;min-height:0}
.palette{padding:18px 10px;grid-row:1 / span 2;min-height:0}
.canvas-panel{grid-column:2;grid-row:1}
.inspector{grid-column:3;grid-row:1 / span 2;min-height:0}
.output-panel{grid-column:2;grid-row:2;min-width:0}
.output-panel.collapsed .output-bar{border-bottom:0;height:43px}
#toggle-output{border:1px solid #527990;padding:5px 9px;color:var(--accent);font-size:11px;flex-shrink:0}
#toggle-output:hover{background:#2a3b4d;border-color:var(--accent)}
.orientation-controls{border:1px solid var(--line);border-radius:6px;margin:0 0 18px;padding:10px;min-width:0}
.orientation-controls legend{color:var(--muted);font-size:11px;padding:0 5px}
.rotation-actions{display:flex;gap:6px;flex-wrap:wrap}
.rotation-actions button{flex:1;padding:7px 6px;font-size:11px}
.rotation-angle{display:block;margin-top:8px;color:var(--muted);font:11px Consolas,monospace;text-align:center}
.component-documentation{font-size:11px;margin:0 0 16px;white-space:normal}
.property-type strong svg,.palette-symbol svg{display:block}
.restriction-arrow-halo{stroke:#203140}
.palette-symbol .restriction-arrow-halo{stroke:#1c2937}
.property-type .restriction-arrow-halo{stroke:var(--panel)}
.palette>h2{margin-left:5px}
.palette-domain{margin:0 5px 16px}.palette-domain select{font-size:11px;padding:8px 5px}
.palette-library{display:flex;align-items:flex-start;gap:10px}
.palette-tabs{display:flex;flex-direction:column;gap:5px;flex-shrink:0}
.palette-tab{writing-mode:vertical-rl;transform:rotate(180deg);padding:13px 8px;min-height:104px;font-size:11px;letter-spacing:.3px;background:transparent;color:var(--muted);border-color:transparent;border-radius:5px}
.palette-tab[aria-selected=true]{color:var(--accent);background:#223b40;border-color:#426c69;box-shadow:inset -2px 0 var(--accent)}
.palette-content{flex:1;min-width:0}
.palette-content .palette-group:first-child{margin-top:2px}
.palette-content .palette-item{min-height:43px}
.palette-note,#help-button{margin-left:5px;margin-right:5px}
@media(max-width:1200px){.workspace{grid-template-columns:205px minmax(240px,1fr) 280px}.palette{padding:16px 8px}.palette-library{gap:7px}}
@media(max-width:950px){.workspace{grid-template-columns:140px minmax(200px,1fr) 250px}.palette-tab{padding:11px 7px}.palette-content .palette-item{padding:8px 3px}.palette-note{display:none}}
/* Scalar control connections are visually distinct from power bonds. */
.bond.signal .bond-line { stroke: var(--domain-signal); stroke-dasharray: 5 4; }
.bond.signal .harpoon { stroke: var(--domain-signal); }
.port.signal { fill: #f5a9cf; stroke: #754563; }
.bond.signal.selected .bond-line { stroke: #fff; }
.bond.signal.error .bond-line { stroke: #ff6767; }
.signal-preview { width: 100%; max-height: 170px; margin: 10px 0; }

.signal-preview .axis-text { fill: #94a6ba; font: 9px Consolas, monospace; }
.signal-preview .grid-line { stroke: #344558; }

.palette-item[data-type="SignalConstant"] .palette-symbol { font-size: 12px; }