:root{--app-bg:#0f1419;--surface:#151d24;--surface-raised:#1b2530;--surface-subtle:#111820;--surface-hover:#223242;--border:#2f3b47;--border-strong:#455463;--text:#edf2f7;--text-muted:#a5b2c1;--text-subtle:#7f8b99;--accent:#6fa8dc;--accent-strong:#8fc5ff;--accent-soft:#6fa8dc2e;--success:#66d19e;--success-soft:#17362a;--warning:#f6c76f;--warning-soft:#3b2b12;--router-soft:#14233a;--danger:#ff7d7d;--danger-soft:#3d1d22;--active:#ffb86b;--active-soft:#ffb86b29;--grid:#26323d;--shadow:#00000057;color:var(--text);background:var(--app-bg);font-synthesis:none;text-rendering:optimizelegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}*{box-sizing:border-box;scrollbar-color:var(--border-strong) var(--surface-subtle)}::-webkit-scrollbar{width:12px;height:12px}::-webkit-scrollbar-track{background:var(--surface-subtle)}::-webkit-scrollbar-thumb{border:3px solid var(--surface-subtle);background:var(--border-strong);border-radius:999px}::-webkit-scrollbar-thumb:hover{background:var(--text-subtle)}html{background:var(--app-bg);min-width:320px;height:100%}body{min-width:320px;height:100%;min-height:100vh;margin:0;overflow:hidden}#root{height:100%;min-height:100vh}.react-flow{--xy-edge-stroke-default:#b1b1b7;--xy-edge-stroke-width-default:1;--xy-edge-stroke-selected-default:#555;--xy-connectionline-stroke-default:#b1b1b7;--xy-connectionline-stroke-width-default:1;--xy-attribution-background-color-default:#ffffff80;--xy-minimap-background-color-default:#fff;--xy-minimap-mask-background-color-default:#f0f0f099;--xy-minimap-mask-stroke-color-default:transparent;--xy-minimap-mask-stroke-width-default:1;--xy-minimap-node-background-color-default:#e2e2e2;--xy-minimap-node-stroke-color-default:transparent;--xy-minimap-node-stroke-width-default:2;--xy-background-color-default:transparent;--xy-background-pattern-dots-color-default:#91919a;--xy-background-pattern-lines-color-default:#eee;--xy-background-pattern-cross-color-default:#e2e2e2;background-color:var(--xy-background-color,var(--xy-background-color-default));--xy-node-color-default:inherit;--xy-node-border-default:1px solid #1a192b;--xy-node-background-color-default:#fff;--xy-node-group-background-color-default:#f0f0f040;--xy-node-boxshadow-hover-default:0 1px 4px 1px #00000014;--xy-node-boxshadow-selected-default:0 0 0 .5px #1a192b;--xy-node-border-radius-default:3px;--xy-handle-background-color-default:#1a192b;--xy-handle-border-color-default:#fff;--xy-selection-background-color-default:#0059dc14;--xy-selection-border-default:1px dotted #0059dccc;--xy-controls-button-background-color-default:#fefefe;--xy-controls-button-background-color-hover-default:#f4f4f4;--xy-controls-button-color-default:inherit;--xy-controls-button-color-hover-default:inherit;--xy-controls-button-border-color-default:#eee;--xy-controls-box-shadow-default:0 0 2px 1px #00000014;--xy-edge-label-background-color-default:#fff;--xy-edge-label-color-default:inherit;--xy-resize-background-color-default:#3367d9;direction:ltr}.react-flow.dark{--xy-edge-stroke-default:#3e3e3e;--xy-edge-stroke-width-default:1;--xy-edge-stroke-selected-default:#727272;--xy-connectionline-stroke-default:#b1b1b7;--xy-connectionline-stroke-width-default:1;--xy-attribution-background-color-default:#96969640;--xy-minimap-background-color-default:#141414;--xy-minimap-mask-background-color-default:#3c3c3c99;--xy-minimap-mask-stroke-color-default:transparent;--xy-minimap-mask-stroke-width-default:1;--xy-minimap-node-background-color-default:#2b2b2b;--xy-minimap-node-stroke-color-default:transparent;--xy-minimap-node-stroke-width-default:2;--xy-background-color-default:#141414;--xy-background-pattern-dots-color-default:#777;--xy-background-pattern-lines-color-default:#777;--xy-background-pattern-cross-color-default:#777;--xy-node-color-default:#f8f8f8;--xy-node-border-default:1px solid #3c3c3c;--xy-node-background-color-default:#1e1e1e;--xy-node-group-background-color-default:#f0f0f040;--xy-node-boxshadow-hover-default:0 1px 4px 1px #ffffff14;--xy-node-boxshadow-selected-default:0 0 0 .5px #999;--xy-handle-background-color-default:#bebebe;--xy-handle-border-color-default:#1e1e1e;--xy-selection-background-color-default:#c8c8dc14;--xy-selection-border-default:1px dotted #c8c8dccc;--xy-controls-button-background-color-default:#2b2b2b;--xy-controls-button-background-color-hover-default:#3e3e3e;--xy-controls-button-color-default:#f8f8f8;--xy-controls-button-color-hover-default:#fff;--xy-controls-button-border-color-default:#5b5b5b;--xy-controls-box-shadow-default:0 0 2px 1px #00000014;--xy-edge-label-background-color-default:#141414;--xy-edge-label-color-default:#f8f8f8}.react-flow__background{background-color:var(--xy-background-color-props,var(--xy-background-color,var(--xy-background-color-default)));pointer-events:none;z-index:-1}.react-flow__container{width:100%;height:100%;position:absolute;top:0;left:0}.react-flow__pane{z-index:1}.react-flow__pane.draggable{cursor:grab}.react-flow__pane.dragging{cursor:grabbing}.react-flow__pane.selection{cursor:pointer}.react-flow__viewport{transform-origin:0 0;z-index:2;pointer-events:none}.react-flow__renderer{z-index:4}.react-flow__selection{z-index:6}.react-flow__nodesselection-rect:focus,.react-flow__nodesselection-rect:focus-visible{outline:none}.react-flow__edge-path{stroke:var(--xy-edge-stroke,var(--xy-edge-stroke-default));stroke-width:var(--xy-edge-stroke-width,var(--xy-edge-stroke-width-default));fill:none}.react-flow__connection-path{stroke:var(--xy-connectionline-stroke,var(--xy-connectionline-stroke-default));stroke-width:var(--xy-connectionline-stroke-width,var(--xy-connectionline-stroke-width-default));fill:none}.react-flow .react-flow__edges{position:absolute}.react-flow .react-flow__edges svg{pointer-events:none;position:absolute;overflow:visible}.react-flow__edge{pointer-events:visibleStroke}.react-flow__edge.selectable{cursor:pointer}.react-flow__edge.animated path{stroke-dasharray:5;animation:.5s linear infinite dashdraw}.react-flow__edge.animated path.react-flow__edge-interaction{stroke-dasharray:none;animation:none}.react-flow__edge.inactive{pointer-events:none}.react-flow__edge.selected,.react-flow__edge:focus,.react-flow__edge:focus-visible{outline:none}.react-flow__edge.selected .react-flow__edge-path,.react-flow__edge.selectable:focus .react-flow__edge-path,.react-flow__edge.selectable:focus-visible .react-flow__edge-path{stroke:var(--xy-edge-stroke-selected,var(--xy-edge-stroke-selected-default))}.react-flow__edge-textwrapper{pointer-events:all}.react-flow__edge .react-flow__edge-text{pointer-events:none;-webkit-user-select:none;user-select:none}.react-flow__arrowhead polyline{stroke:var(--xy-edge-stroke,var(--xy-edge-stroke-default))}.react-flow__arrowhead polyline.arrowclosed{fill:var(--xy-edge-stroke,var(--xy-edge-stroke-default))}.react-flow__connection{pointer-events:none}.react-flow__connection .animated{stroke-dasharray:5;animation:.5s linear infinite dashdraw}svg.react-flow__connectionline{z-index:1001;position:absolute;overflow:visible}.react-flow__nodes{pointer-events:none;transform-origin:0 0}.react-flow__node{-webkit-user-select:none;user-select:none;pointer-events:all;transform-origin:0 0;box-sizing:border-box;cursor:default;position:absolute}.react-flow__node.selectable{cursor:pointer}.react-flow__node.draggable{cursor:grab;pointer-events:all}.react-flow__node.draggable.dragging{cursor:grabbing}.react-flow__nodesselection{z-index:3;transform-origin:0 0;pointer-events:none}.react-flow__nodesselection-rect{pointer-events:all;cursor:grab;position:absolute}.react-flow__handle{pointer-events:none;background-color:var(--xy-handle-background-color,var(--xy-handle-background-color-default));border:1px solid var(--xy-handle-border-color,var(--xy-handle-border-color-default));border-radius:100%;width:6px;min-width:5px;height:6px;min-height:5px;position:absolute}.react-flow__handle.connectingfrom{pointer-events:all}.react-flow__handle.connectionindicator{pointer-events:all;cursor:crosshair}.react-flow__handle-bottom{top:auto;bottom:0;left:50%;transform:translate(-50%,50%)}.react-flow__handle-top{top:0;left:50%;transform:translate(-50%,-50%)}.react-flow__handle-left{top:50%;left:0;transform:translate(-50%,-50%)}.react-flow__handle-right{top:50%;right:0;transform:translate(50%,-50%)}.react-flow__edgeupdater{cursor:move;pointer-events:all}.react-flow__pane.selection .react-flow__panel{pointer-events:none}.react-flow__panel{z-index:5;margin:15px;position:absolute}.react-flow__panel.top{top:0}.react-flow__panel.bottom{bottom:0}.react-flow__panel.top.center,.react-flow__panel.bottom.center{left:50%;transform:translate(-15px)translate(-50%)}.react-flow__panel.left{left:0}.react-flow__panel.right{right:0}.react-flow__panel.left.center,.react-flow__panel.right.center{top:50%;transform:translateY(-15px)translateY(-50%)}.react-flow__attribution{background:var(--xy-attribution-background-color,var(--xy-attribution-background-color-default));margin:0;padding:2px 3px;font-size:10px}.react-flow__attribution a{color:#999;text-decoration:none}@keyframes dashdraw{0%{stroke-dashoffset:10px}}.react-flow__edgelabel-renderer{pointer-events:none;-webkit-user-select:none;user-select:none;width:100%;height:100%;position:absolute;top:0;left:0}.react-flow__viewport-portal{-webkit-user-select:none;user-select:none;width:100%;height:100%;position:absolute;top:0;left:0}.react-flow__minimap{background:var(--xy-minimap-background-color-props,var(--xy-minimap-background-color,var(--xy-minimap-background-color-default)))}.react-flow__minimap-svg{display:block}.react-flow__minimap-mask{fill:var(--xy-minimap-mask-background-color-props,var(--xy-minimap-mask-background-color,var(--xy-minimap-mask-background-color-default)));stroke:var(--xy-minimap-mask-stroke-color-props,var(--xy-minimap-mask-stroke-color,var(--xy-minimap-mask-stroke-color-default)));stroke-width:var(--xy-minimap-mask-stroke-width-props,var(--xy-minimap-mask-stroke-width,var(--xy-minimap-mask-stroke-width-default)))}.react-flow__minimap-node{fill:var(--xy-minimap-node-background-color-props,var(--xy-minimap-node-background-color,var(--xy-minimap-node-background-color-default)));stroke:var(--xy-minimap-node-stroke-color-props,var(--xy-minimap-node-stroke-color,var(--xy-minimap-node-stroke-color-default)));stroke-width:var(--xy-minimap-node-stroke-width-props,var(--xy-minimap-node-stroke-width,var(--xy-minimap-node-stroke-width-default)))}.react-flow__background-pattern.dots{fill:var(--xy-background-pattern-color-props,var(--xy-background-pattern-color,var(--xy-background-pattern-dots-color-default)))}.react-flow__background-pattern.lines{stroke:var(--xy-background-pattern-color-props,var(--xy-background-pattern-color,var(--xy-background-pattern-lines-color-default)))}.react-flow__background-pattern.cross{stroke:var(--xy-background-pattern-color-props,var(--xy-background-pattern-color,var(--xy-background-pattern-cross-color-default)))}.react-flow__controls{box-shadow:var(--xy-controls-box-shadow,var(--xy-controls-box-shadow-default));flex-direction:column;display:flex}.react-flow__controls.horizontal{flex-direction:row}.react-flow__controls-button{background:var(--xy-controls-button-background-color,var(--xy-controls-button-background-color-default));border:none;border-bottom:1px solid var(--xy-controls-button-border-color-props,var(--xy-controls-button-border-color,var(--xy-controls-button-border-color-default)));width:26px;height:26px;color:var(--xy-controls-button-color-props,var(--xy-controls-button-color,var(--xy-controls-button-color-default)));cursor:pointer;-webkit-user-select:none;user-select:none;justify-content:center;align-items:center;padding:4px;display:flex}.react-flow__controls-button svg{fill:currentColor;width:100%;max-width:12px;max-height:12px}.react-flow__edge.updating .react-flow__edge-path{stroke:#777}.react-flow__edge-text{font-size:10px}.react-flow__node.selectable:focus,.react-flow__node.selectable:focus-visible{outline:none}.react-flow__node-input,.react-flow__node-default,.react-flow__node-output,.react-flow__node-group{border-radius:var(--xy-node-border-radius,var(--xy-node-border-radius-default));width:150px;color:var(--xy-node-color,var(--xy-node-color-default));text-align:center;border:var(--xy-node-border,var(--xy-node-border-default));background-color:var(--xy-node-background-color,var(--xy-node-background-color-default));padding:10px;font-size:12px}.react-flow__node-input.selectable:hover,.react-flow__node-default.selectable:hover,.react-flow__node-output.selectable:hover,.react-flow__node-group.selectable:hover{box-shadow:var(--xy-node-boxshadow-hover,var(--xy-node-boxshadow-hover-default))}.react-flow__node-input.selectable.selected,.react-flow__node-input.selectable:focus,.react-flow__node-input.selectable:focus-visible,.react-flow__node-default.selectable.selected,.react-flow__node-default.selectable:focus,.react-flow__node-default.selectable:focus-visible,.react-flow__node-output.selectable.selected,.react-flow__node-output.selectable:focus,.react-flow__node-output.selectable:focus-visible,.react-flow__node-group.selectable.selected,.react-flow__node-group.selectable:focus,.react-flow__node-group.selectable:focus-visible{box-shadow:var(--xy-node-boxshadow-selected,var(--xy-node-boxshadow-selected-default))}.react-flow__node-group{background-color:var(--xy-node-group-background-color,var(--xy-node-group-background-color-default))}.react-flow__nodesselection-rect,.react-flow__selection{background:var(--xy-selection-background-color,var(--xy-selection-background-color-default));border:var(--xy-selection-border,var(--xy-selection-border-default))}.react-flow__nodesselection-rect:focus,.react-flow__nodesselection-rect:focus-visible,.react-flow__selection:focus,.react-flow__selection:focus-visible{outline:none}.react-flow__controls-button:hover{background:var(--xy-controls-button-background-color-hover-props,var(--xy-controls-button-background-color-hover,var(--xy-controls-button-background-color-hover-default)));color:var(--xy-controls-button-color-hover-props,var(--xy-controls-button-color-hover,var(--xy-controls-button-color-hover-default)))}.react-flow__controls-button:disabled{pointer-events:none}.react-flow__controls-button:disabled svg{fill-opacity:.4}.react-flow__controls-button:last-child{border-bottom:none}.react-flow__controls.horizontal .react-flow__controls-button{border-bottom:none;border-right:1px solid var(--xy-controls-button-border-color-props,var(--xy-controls-button-border-color,var(--xy-controls-button-border-color-default)))}.react-flow__controls.horizontal .react-flow__controls-button:last-child{border-right:none}.react-flow__resize-control{position:absolute}.react-flow__resize-control.left,.react-flow__resize-control.right{cursor:ew-resize}.react-flow__resize-control.top,.react-flow__resize-control.bottom{cursor:ns-resize}.react-flow__resize-control.top.left,.react-flow__resize-control.bottom.right{cursor:nwse-resize}.react-flow__resize-control.bottom.left,.react-flow__resize-control.top.right{cursor:nesw-resize}.react-flow__resize-control.handle{background-color:var(--xy-resize-background-color,var(--xy-resize-background-color-default));border:1px solid #fff;border-radius:1px;width:5px;height:5px;translate:-50% -50%}.react-flow__resize-control.handle.left{top:50%;left:0}.react-flow__resize-control.handle.right{top:50%;left:100%}.react-flow__resize-control.handle.top{top:0;left:50%}.react-flow__resize-control.handle.bottom{top:100%;left:50%}.react-flow__resize-control.handle.top.left,.react-flow__resize-control.handle.bottom.left{left:0}.react-flow__resize-control.handle.top.right,.react-flow__resize-control.handle.bottom.right{left:100%}.react-flow__resize-control.line{border-color:var(--xy-resize-background-color,var(--xy-resize-background-color-default));border-style:solid;border-width:0}.react-flow__resize-control.line.left,.react-flow__resize-control.line.right{width:1px;height:100%;top:0;transform:translate(-50%)}.react-flow__resize-control.line.left{border-left-width:1px;left:0}.react-flow__resize-control.line.right{border-right-width:1px;left:100%}.react-flow__resize-control.line.top,.react-flow__resize-control.line.bottom{width:100%;height:1px;left:0;transform:translateY(-50%)}.react-flow__resize-control.line.top{border-top-width:1px;top:0}.react-flow__resize-control.line.bottom{border-bottom-width:1px;top:100%}.react-flow__edge-textbg{fill:var(--xy-edge-label-background-color,var(--xy-edge-label-background-color-default))}.react-flow__edge-text{fill:var(--xy-edge-label-color,var(--xy-edge-label-color-default))}.lab-shell{background:var(--app-bg);height:100vh;min-height:0;color:var(--text);grid-template-rows:auto minmax(0,1fr);display:grid;overflow:hidden}.top-bar{border-bottom:1px solid var(--border);background:var(--surface);justify-content:space-between;align-items:center;gap:12px 24px;min-height:64px;padding:12px 24px;display:flex}.top-bar h1{white-space:nowrap;flex:0 auto;margin:0;font-size:20px;font-weight:650;line-height:1.2}.simulation-controls,.tool-list,.topology-actions{flex-wrap:wrap;align-items:center;gap:8px;display:flex}button{border:1px solid var(--border-strong);background:var(--surface-raised);min-height:34px;color:var(--text);cursor:pointer;border-radius:6px;padding:0 12px}button:hover{border-color:var(--accent);background:var(--surface-hover)}button:disabled{cursor:not-allowed;opacity:.55}select,input{border:1px solid var(--border-strong);background:var(--surface-raised);width:100%;min-height:32px;color:var(--text);border-radius:6px;padding:4px 8px}.workspace{--left-panel-width:240px;--right-panel-width:360px;--bottom-panel-height:320px;grid-template-rows:minmax(0, 1fr) 8px var(--bottom-panel-height);grid-template-columns:var(--left-panel-width) 8px minmax(420px, 1fr) 8px var(--right-panel-width);min-height:0;display:grid;overflow:hidden}.palette,.inspector{background:var(--surface);min-width:0;min-height:0;padding:16px;overflow-y:auto}.palette{grid-area:1/1/4}.inspector{grid-area:1/5/4}.panel-resizer{background:var(--border);touch-action:none;min-width:0;min-height:0;transition:background .12s}.panel-resizer:hover,.panel-resizer:focus-visible{background:var(--accent);outline:none}.panel-resizer-left{cursor:col-resize;grid-area:1/2/4}.panel-resizer-right{cursor:col-resize;grid-area:1/4/4}.panel-resizer-bottom{cursor:row-resize;grid-area:2/3}h2,h3{color:var(--text);margin:0}h2{font-size:15px;font-weight:700}h3{font-size:13px;font-weight:700}.palette,.inspector,.example-menu,.packet-tool,.persistence-controls,.topology-actions,.inspector section{flex-direction:column;gap:12px;display:flex}.clear-topology-button{border-color:var(--danger);background:var(--danger);color:#210b0d;font-weight:750}.clear-topology-button:hover{border-color:var(--danger);background:#ff9494}.packet-tool label{gap:4px;display:grid}.example-menu{gap:8px;display:grid}.packet-tool label span{color:var(--text-muted);font-size:12px;font-weight:700}.packet-send-button{background:var(--success);color:#07130e;border-color:#0000;font-weight:750}.packet-send-button:hover{border-color:var(--success);background:#7be0af}.persistence-buttons{grid-template-columns:1fr 1fr;gap:8px;display:grid}.persistence-controls textarea{resize:vertical;border:1px solid var(--border-strong);background:var(--surface-raised);min-height:80px;color:var(--text);border-radius:6px;padding:8px;font-family:ui-monospace,SFMono-Regular,Consolas,monospace;font-size:11px}.tool-list button{flex:90px}dl{gap:8px;margin:0;display:grid}dl div{justify-content:space-between;gap:12px;display:flex}dt,th{color:var(--text-muted);font-size:12px;font-weight:700}dd{margin:0;font-size:13px}.canvas{background:linear-gradient(var(--grid) 1px, transparent 1px), linear-gradient(90deg, var(--grid) 1px, transparent 1px), var(--surface-subtle);background-size:28px 28px;grid-area:1/3;grid-template-rows:auto minmax(0,1fr);min-width:0;min-height:0;display:grid}.canvas .react-flow{height:100%;min-height:0}.react-flow__controls{border:1px solid var(--border);box-shadow:0 10px 20px var(--shadow);border-radius:6px;overflow:hidden}.react-flow__controls button{border:0;border-bottom:1px solid var(--border);background:var(--surface-raised);color:var(--text);fill:currentColor;border-radius:0}.react-flow__controls button:hover{background:var(--surface-hover)}.react-flow__controls button:last-child{border-bottom:0}.react-flow__minimap{border:1px solid var(--border);background:var(--surface-raised);border-radius:8px}.react-flow__minimap-mask{fill:#0f1419b8}.react-flow__handle{border-color:var(--surface-subtle);background:var(--accent)}.canvas-toolbar{border-bottom:1px solid var(--border);color:var(--text-muted);background:#151d24e6;justify-content:space-between;gap:16px;padding:12px 16px;font-size:13px;display:flex}.network-node-card{border:2px solid var(--border-strong);background:var(--surface-raised);width:132px;min-height:92px;color:var(--text);box-shadow:0 12px 24px var(--shadow);border-radius:8px;gap:6px;padding:10px;display:grid}.network-node-card.selected{outline-offset:5px;box-shadow:0 0 0 9px #5ba9ff33, 0 12px 24px var(--shadow);outline:4px solid #8fd3ff}.network-node-card.active{box-shadow:0 0 0 5px var(--active-soft), 0 12px 24px var(--shadow)}.network-node-card.selected.active{box-shadow:0 0 0 5px var(--active-soft), 0 0 0 10px #5ba9ff38, 0 12px 24px var(--shadow)}.network-node-card.host{border-color:var(--success);background:var(--success-soft)}.network-node-card.switch{border-color:var(--warning);background:var(--warning-soft)}.network-node-card.router{border-color:var(--accent);background:var(--router-soft)}.node-title{text-align:center;font-weight:750}.node-kind{color:var(--text-muted);text-align:center;font-size:12px;font-weight:700}.node-interfaces{text-align:center;gap:3px;min-height:20px;margin:0;padding:0;font-family:ui-monospace,SFMono-Regular,Consolas,monospace;font-size:11px;list-style:none;display:grid}.link-edge{stroke:var(--text-subtle);stroke-width:2.5px}.link-edge.selected{stroke:var(--accent);stroke-width:4px}.link-edge.moving{stroke:var(--active);stroke-dasharray:8 6;animation:.9s linear infinite link-flow}.link-packet-dot{fill:var(--active);stroke:var(--surface-subtle);stroke-width:2px;pointer-events:none}.link-edge-label{border:1px solid var(--border-strong);background:var(--surface-raised);color:var(--text-muted);pointer-events:all;border-radius:999px;padding:2px 8px;font-size:11px;position:absolute}.inspector table{border-collapse:collapse;width:100%;font-size:13px}.inspector th,.inspector td{border-bottom:1px solid var(--border);text-align:left;padding:8px 6px}.routing-table-wrapper{overflow-x:auto}.routing-table-editor{min-width:720px}.routing-table-actions{justify-content:flex-end;display:flex}.routing-table-editor input,.routing-table-editor select{min-width:96px}.routing-table-editor input[type=checkbox]{width:auto;min-width:0;min-height:0}.route-cidr-inputs{grid-template-columns:minmax(120px,1fr) 68px;gap:6px;display:grid}.route-cidr-inputs input{min-width:0}.inspector p{margin:0;font-size:14px}.link-packet-details{border-top:1px solid var(--border);padding-top:12px}.packet-header-block{gap:8px;display:grid}.packet-header-block h4{color:var(--text);margin:0;font-size:12px;font-weight:800}.packet-data{overflow-wrap:anywhere;background:var(--surface-raised);border-radius:4px;max-width:100%;padding:2px 4px;font-family:ui-monospace,SFMono-Regular,Consolas,monospace;font-size:12px;display:inline-block}.danger-button{border-color:var(--danger);color:var(--danger)}.danger-button:hover{border-color:var(--danger);background:var(--danger-soft)}.validation-panel ul{gap:6px;margin:0;padding-left:18px;font-size:13px;display:grid}.validation-panel li{white-space:pre-line}.validation-panel .error{color:var(--danger)}.validation-panel .warning{color:var(--warning)}.highlight-row{background:var(--accent-soft)}.simulation-panel{border-top:1px solid var(--border);background:var(--surface);grid-area:3/3;grid-template-rows:auto minmax(0,1fr);gap:12px;min-height:0;padding:14px 24px 18px;display:grid;overflow:hidden}.simulation-panel-header{justify-content:space-between;align-items:center;gap:12px;min-width:0;display:flex}.simulation-panel-content{grid-template-rows:auto minmax(0,1fr);gap:12px;min-height:0;display:grid;overflow:hidden}.simulation-controls span{color:var(--text-muted);white-space:nowrap;font-size:13px}.simulation-toggle-button{border-color:#0000;font-weight:750}.simulation-toggle-button.play{background:var(--success);color:#07130e}.simulation-toggle-button.play:hover{border-color:var(--success);background:#7be0af}.simulation-toggle-button.pause{background:var(--danger);color:#210b0d}.simulation-toggle-button.pause:hover{border-color:var(--danger);background:#ff9494}.top-bar .simulation-controls{flex:620px;justify-content:flex-end}.top-bar .simulation-controls select{width:auto;min-width:76px}.event-log{min-height:0;color:var(--text-muted);gap:6px;margin:0;padding:0 0 0 32px;font-family:ui-monospace,SFMono-Regular,Consolas,monospace;font-size:12px;display:grid;overflow:auto}.event-log .active-event{color:var(--text);font-weight:800}.packet-token{border:1px solid var(--accent);background:var(--surface-raised);min-width:120px;color:var(--accent-strong);text-align:center;border-radius:999px;padding:6px 12px;font-weight:800;animation:.9s ease-in-out infinite alternate packet-pulse}.packet-token.dropped{border-color:var(--danger);color:var(--danger)}@keyframes packet-pulse{0%{transform:translate(-14px)}to{transform:translate(14px)}}@keyframes link-flow{to{stroke-dashoffset:-14px}}@media (width<=980px){body{overflow:auto}.lab-shell{height:auto;min-height:100vh;overflow:visible}.top-bar,.canvas-toolbar{flex-direction:column;align-items:flex-start}.top-bar h1{white-space:normal}.top-bar .simulation-controls{flex:0 auto;justify-content:flex-start;width:100%}.workspace{grid-template-rows:auto minmax(420px,55vh) auto auto;grid-template-columns:1fr;overflow:visible}.panel-resizer{display:none}.palette,.inspector{border:0;border-bottom:1px solid var(--border);grid-area:auto;max-height:none;overflow:visible}.canvas{min-height:420px}.canvas,.simulation-panel{grid-area:auto}.simulation-panel-header{flex-direction:column;align-items:flex-start}}