:root{--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light;--paper:#efeee9;--paper-deep:#e6e4dd;--ink:#11110f;--muted:#66655f;--faint:#aaa89f;--line:#c6c4bc;--line-strong:#85837b;--oxide:#8d3f2d;--focus:#244fa8;--mono:"SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;--sans:Arial, Helvetica, "Noto Sans TC", sans-serif}*{box-sizing:border-box}html,body{background:var(--paper);width:100%;min-width:0;height:100%;color:var(--ink);font-family:var(--sans);margin:0;overflow:hidden}button,input,select{font:inherit}button{color:inherit}button:focus-visible,input:focus-visible,summary:focus-visible,[href]:focus-visible,[tabindex]:focus-visible{outline:2px solid var(--focus);outline-offset:2px}.skip-link{z-index:100;border:1px solid var(--focus);background:var(--paper);font:12px var(--mono);padding:8px 12px;position:fixed;top:6px;left:6px;transform:translateY(-150%)}.skip-link:focus{transform:translateY(0)}@media (prefers-reduced-motion:reduce){*,:before,:after{scroll-behavior:auto!important;transition-duration:.01ms!important}}.instrument{background:var(--paper);grid-template-rows:52px minmax(0,1fr) 28px;width:100vw;height:100dvh;display:grid;overflow:hidden}.instrument.is-topology-unlocked .topbar{box-shadow:inset 0 2px 0 var(--oxide)}.topbar{z-index:10;border-bottom:1px solid var(--line-strong);background:var(--paper-deep);grid-template-columns:minmax(210px,1fr) auto minmax(510px,1.45fr);align-items:stretch;display:grid}.brand-block,.specimen-heading,.top-actions{min-width:0}.brand-block{border-right:1px solid var(--line);flex-direction:column;justify-content:center;padding:0 16px;display:flex}.brand-line{align-items:baseline;gap:10px;min-width:0;display:flex}.brand-home{color:inherit;letter-spacing:.035em;text-overflow:ellipsis;white-space:nowrap;font-size:14px;font-weight:700;text-decoration:none;overflow:hidden}.xakian-links{font:7px var(--mono);letter-spacing:.06em;flex:none;gap:7px;margin-left:auto;display:flex}.xakian-links a{color:var(--muted);text-decoration:none}.xakian-links a:hover{color:var(--ink)}.brand-subtitle,.specimen-heading span{color:var(--muted);font:9px var(--mono);letter-spacing:.09em;margin-top:3px}.specimen-heading{text-align:center;flex-direction:column;justify-content:center;min-width:210px;padding:0 20px;display:flex}.specimen-heading strong{letter-spacing:.04em;font-size:13px}.top-actions{border-left:1px solid var(--line);justify-content:flex-end;align-items:stretch;display:flex}.mode-switch{display:flex}.topbar button,.lock-state{border:0;border-left:1px solid var(--line);min-width:50px;font:10px var(--mono);letter-spacing:.04em;white-space:nowrap;background:0 0;border-radius:0;justify-content:center;align-items:center;padding:0 10px;display:inline-flex}.topbar button:not(:disabled):hover,.topbar button[aria-pressed=true]{background:var(--ink);color:var(--paper)}.topbar button:disabled{color:var(--faint)}.lock-state{border-left-color:var(--line-strong);min-width:106px;color:var(--muted)}.warning,.lock-state.warning{color:var(--oxide)}.instrument-body{grid-template-columns:190px minmax(0,1fr) 252px;min-width:0;min-height:0;display:grid}.side-panel{background:var(--paper-deep);scrollbar-width:thin;min-width:0;min-height:0;overflow:auto}.knot-panel{border-right:1px solid var(--line-strong)}.control-panel{border-left:1px solid var(--line-strong)}.panel-label{border-bottom:1px solid var(--line);min-height:34px;font:10px var(--mono);letter-spacing:.08em;justify-content:space-between;align-items:baseline;padding:11px 12px 8px;display:flex}.panel-label small{color:var(--muted);font-size:8px}.specimen-list{flex-direction:column;display:flex}.specimen-row{border:0;border-bottom:1px solid var(--line);text-align:left;background:0 0;border-radius:0;grid-template-columns:26px 32px minmax(0,1fr);align-items:center;min-height:53px;padding:0 10px;display:grid}.specimen-row:hover{background:var(--paper)}.specimen-row[aria-pressed=true]{background:var(--ink);color:var(--paper)}.specimen-number,.specimen-notation{font:10px var(--mono)}.specimen-notation{font-size:13px}.specimen-name{letter-spacing:.035em;text-overflow:ellipsis;white-space:nowrap;font-size:11px;overflow:hidden}.source-note{color:var(--muted);font:8px var(--mono);flex-direction:column;gap:5px;padding:12px;line-height:1.5;display:flex}.source-note code{overflow-wrap:anywhere}.workspace{background:var(--paper);min-width:0;min-height:0;position:relative;overflow:hidden}.canvas-shell,.knot-canvas{width:100%;height:100%}.canvas-shell{position:relative;overflow:hidden}.knot-canvas{touch-action:none;cursor:crosshair;display:block}.knot-canvas:active{cursor:grabbing}.canvas-corner-readout{color:var(--muted);font:8px var(--mono);pointer-events:none;gap:12px;display:flex;position:absolute;bottom:10px;right:10px}.workspace-badge{color:var(--muted);font:9px var(--mono);pointer-events:none;position:absolute;top:9px;left:10px}.control-section{border-bottom:1px solid var(--line-strong)}.field-grid,.solver-grid,.view-grid{display:grid}.field-grid{grid-template-columns:1fr 1fr}.field-grid button,.solver-grid button,.view-grid button{border:0;border-right:1px solid var(--line);border-bottom:1px solid var(--line);min-height:38px;font:9px var(--mono);text-align:left;background:0 0;border-radius:0;padding:0 10px}.field-grid button:nth-child(2n),.solver-grid button:nth-child(2n){border-right:0}.field-grid button:hover,.solver-grid button:hover,.view-grid button:hover,.field-grid button[aria-pressed=true]{background:var(--ink);color:var(--paper)}.solver-grid{grid-template-columns:1fr 1fr}.solver-grid button:last-child{border-right:0;grid-column:1/-1}.selection-section{min-height:122px}.crossing-readout{font:9px var(--mono);flex-direction:column;gap:6px;padding:11px 12px 14px;display:flex}.crossing-readout strong{color:var(--oxide);margin-bottom:2px;font-size:10px}.empty-selection{color:var(--muted);font:9px var(--mono);margin:0;padding:17px 12px}.selection-actions,.topology-actions,.project-actions{grid-template-columns:1fr 1fr;display:grid}.selection-actions button,.topology-actions button,.full-control,.inline-confirm button,.project-actions button,.save-row button,.snapshot-row button{border:0;border-top:1px solid var(--line);border-right:1px solid var(--line);min-height:36px;font:8px var(--mono);text-align:left;background:0 0;border-radius:0;padding:7px 9px}.selection-actions button:nth-child(2n),.topology-actions button:nth-child(2n),.project-actions button:nth-child(2n){border-right:0}.selection-actions button:not(:disabled):hover,.selection-actions button[aria-pressed=true],.topology-actions button:not(:disabled):hover,.full-control:hover,.inline-confirm button:hover,.project-actions button:hover,.save-row button:hover,.snapshot-row button:hover{background:var(--ink);color:var(--paper)}.selection-actions button:disabled,.topology-actions button:disabled{color:var(--faint)}.topology-section{box-shadow:inset 2px 0 0 var(--oxide)}.topology-section .warning-control,.inline-confirm .warning-control{color:var(--oxide)}.full-control{border-right:0;width:100%}.inline-confirm{grid-template-columns:1fr 70px 70px;align-items:stretch;display:grid}.inline-confirm legend{width:auto;color:var(--oxide);font:8px var(--mono);border:0;align-items:center;margin:0;padding:0 10px;display:flex}.inline-confirm{border:0;margin:0;padding:0}.parameters-panel,.traversal-panel,.project-panel{border-bottom:1px solid var(--line-strong)}.parameters-panel>summary,.traversal-panel>summary,.project-panel>summary,.energy-section summary{cursor:pointer;min-height:36px;font:9px var(--mono);letter-spacing:.06em;justify-content:space-between;align-items:center;padding:0 12px;list-style:none;display:flex}.parameters-panel>summary::-webkit-details-marker{display:none}.traversal-panel>summary::-webkit-details-marker{display:none}.project-panel>summary::-webkit-details-marker{display:none}.energy-section summary::-webkit-details-marker{display:none}.parameters-panel>summary:before,.traversal-panel>summary:before,.project-panel>summary:before,.energy-section summary:before{content:"+";color:var(--muted);margin-right:7px}.parameters-panel[open]>summary:before,.traversal-panel[open]>summary:before,.project-panel[open]>summary:before,.energy-section details[open] summary:before{content:"−"}.parameters-panel>summary span,.traversal-panel>summary span,.project-panel>summary span,.energy-section summary span{color:var(--muted);margin-left:auto;font-size:7px}.parameter-body,.traversal-body,.project-body,.energy-section dl{border-top:1px solid var(--line)}.parameter-section h3{color:var(--muted);font:8px var(--mono);letter-spacing:.08em;margin:0;padding:9px 12px 6px}.parameter-row{border-top:1px solid color-mix(in srgb, var(--line) 72%, transparent);padding:7px 10px 8px;display:block}.parameter-heading,.parameter-controls{font:8px var(--mono);justify-content:space-between;align-items:center;gap:8px;display:flex}.parameter-heading output{color:var(--oxide)}.parameter-controls input[type=range]{min-width:0;height:22px;accent-color:var(--ink);flex:1}.parameter-controls button{border:1px solid var(--line);width:40px;height:28px;font:8px var(--mono);background:0 0;border-radius:0}.parameter-row small{color:var(--muted);font:7px/1.35 var(--sans);margin-top:3px;display:block}.traversal-component{border-bottom:1px solid var(--line);padding:9px 10px 11px}.traversal-component>strong,.traversal-boundary{color:var(--muted);font:8px var(--mono);display:block}.traversal-boundary{margin:6px 0}.traversal-tokens{grid-template-columns:1fr 1fr;gap:2px;display:grid}.traversal-tokens button{border:1px solid var(--line);background:var(--paper);min-height:29px;font:8px var(--mono);text-align:left;border-radius:0}.traversal-tokens button:hover{border-color:var(--oxide);color:var(--oxide)}.energy-section{padding:0}.energy-section details{width:100%}.energy-section dl{font:8px var(--mono);margin:0;padding:6px 12px 9px}.energy-section dl div{justify-content:space-between;padding:3px 0;display:flex}.energy-section dd{color:var(--muted);margin:0}.save-row{grid-template-columns:minmax(0,1fr) 78px;display:grid}.save-row input,.snapshot-row time,.snapshot-row button,.export-options{font:8px var(--mono)}.save-row input{border:0;border-right:1px solid var(--line);background:var(--paper);border-radius:0;min-width:0;height:36px;padding:0 9px}.snapshot-row{border-top:1px solid var(--line);grid-template-columns:minmax(0,1fr) 58px 34px;align-items:center;display:grid}.snapshot-row>button:first-child{text-overflow:ellipsis;white-space:nowrap;border-top:0;overflow:hidden}.snapshot-row time{color:var(--muted)}.snapshot-row>button:last-child{text-align:center;border-top:0;border-right:0}.project-actions button:last-child{border-right:0;grid-column:1/-1}.export-options{border:0;border-top:1px solid var(--line);gap:10px;margin:0;padding:9px 10px 10px;display:flex}.export-options legend{color:var(--muted);padding-top:8px}.export-options label{align-items:center;gap:3px;display:flex}.view-grid button{border-right:0}.diagnostic-bar{z-index:11;border-top:1px solid var(--line-strong);background:var(--paper-deep);min-width:0;font:9px var(--mono);white-space:nowrap;align-items:center;gap:0;display:flex;overflow:hidden}.diagnostic-bar>*{border-right:1px solid var(--line);padding:0 12px}.diagnostic-tail{color:var(--muted);margin-left:auto;border-right:0!important}.mobile-switcher{display:none}.sr-only{clip:rect(0, 0, 0, 0);white-space:nowrap;border:0;width:1px;height:1px;padding:0;position:absolute;overflow:hidden}@media (max-width:1120px){.topbar{grid-template-columns:210px minmax(160px,1fr) auto}.brand-subtitle,.specimen-heading span,.lock-state,.xakian-links a:last-child{display:none}.instrument-body{grid-template-columns:165px minmax(0,1fr) 224px}}@media (max-width:860px){.instrument{grid-template-rows:50px 44px minmax(0,1fr) 38px}.topbar{grid-template-columns:minmax(165px,1fr) auto}.specimen-heading,.compact-action{display:none!important}.brand-block{border-right:0}.top-actions{border-left:1px solid var(--line-strong)}.topbar button{min-width:44px;padding:0 7px;font-size:8px}.lock-state{width:44px;min-width:44px;padding:0;font-size:0;display:inline-flex;overflow:hidden}.lock-state:after{content:"LOCK";font:7px var(--mono)}.lock-state.warning:after{content:"UNLOCK";color:var(--oxide);font-size:6px}.mobile-switcher{border-bottom:1px solid var(--line-strong);background:var(--paper-deep);text-align:center;grid-template-columns:88px minmax(0,1fr) 88px;align-items:center;display:grid}.mobile-switcher button{border:0;border-right:1px solid var(--line);height:43px;font:10px var(--mono);background:0 0;border-radius:0}.mobile-switcher button:last-child{border-right:0;border-left:1px solid var(--line)}.mobile-switcher button[aria-expanded=true]{background:var(--ink);color:var(--paper)}.mobile-switcher strong{text-overflow:ellipsis;white-space:nowrap;font-size:11px;overflow:hidden}.instrument-body{min-height:0;display:block;position:relative}.workspace{width:100%;height:100%}.side-panel{z-index:20;width:min(310px,86vw);box-shadow:none;display:none;position:absolute;top:0;bottom:0}.side-panel.is-open{display:block}.knot-panel{left:0}.control-panel{right:0}.specimen-row,.field-grid button,.solver-grid button,.view-grid button{min-height:44px}.canvas-corner-readout{display:none}.diagnostic-bar{white-space:normal;grid-template-columns:repeat(3,auto);place-content:center start;row-gap:3px;display:grid}.diagnostic-bar>*{border-right:1px solid var(--line);padding:0 7px}.diagnostic-bar>:nth-child(4),.diagnostic-bar>:nth-child(5),.diagnostic-tail{display:none}}@media (max-width:520px){.brand-block{padding:0 10px}.brand-home{font-size:11px}.xakian-links a:not(:first-child){display:none}.mode-switch button{width:44px;font-size:0;overflow:hidden}.mode-switch button:after{font-size:10px}.mode-switch button:first-child:after{content:"S"}.mode-switch button:nth-child(2):after{content:"X"}.mode-switch button:nth-child(3):after{content:"T"}}