:root{--bg-primary: #121214;--bg-secondary: #1a1a1e;--bg-panel: #222227;--bg-upload: #2a2a30;--bg-upload-active: #323545;--border-color: #383842;--text-primary: #e4e4eb;--text-secondary: #a1a1b5;--primary-color: #4f46e5;--primary-hover: #6366f1;--secondary-color: #3f3f46;--secondary-hover: #52525b;--travel-color: #409eff;--cut-color: #3b82f6;--font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif}*{box-sizing:border-box;margin:0;padding:0}body{font-family:var(--font-family);background-color:var(--bg-primary);color:var(--text-primary);overflow:hidden;height:100vh}#app{display:grid;grid-template-columns:320px 1fr;grid-template-rows:1fr 30px;grid-template-areas:"sidebar main" "status status";height:100vh;transition:grid-template-columns .3s cubic-bezier(.4,0,.2,1)}#app.sidebar-collapsed{grid-template-columns:0px 1fr}.sidebar{grid-area:sidebar;background-color:var(--bg-secondary);border-right:1px solid var(--border-color);padding:20px;display:flex;flex-direction:column;gap:20px;overflow-y:auto;transition:all .3s cubic-bezier(.4,0,.2,1);min-width:0}#app.sidebar-collapsed .sidebar{padding:20px 0;opacity:0;border-right-width:0;pointer-events:none;overflow:hidden}.sidebar-header h1{font-size:1.05rem;font-weight:700;color:#fff;line-height:1.35;letter-spacing:-.015em;margin:0}.sidebar-title-row{display:flex;align-items:flex-start;justify-content:space-between;gap:12px}.sidebar-close-btn{display:none;background:#ffffff14;border:1px solid var(--border-color);color:var(--text-secondary);border-radius:6px;width:32px;height:32px;align-items:center;justify-content:center;cursor:pointer;transition:all .2s;flex-shrink:0}.sidebar-close-btn:hover{background:#ffffff26;color:#fff}.sidebar-backdrop{display:none;position:fixed;top:0;right:0;bottom:0;left:0;background:#0009;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);z-index:400;opacity:0;transition:opacity .3s ease;pointer-events:none}.upload-zone{background-color:var(--bg-upload);border:2px dashed var(--border-color);border-radius:8px;padding:24px 16px;text-align:center;display:flex;flex-direction:column;align-items:center;gap:12px;cursor:pointer;transition:all .2s ease-in-out}.upload-zone:hover,.upload-zone.dragover{border-color:var(--primary-hover);background-color:var(--bg-upload-active)}.upload-icon{color:var(--text-secondary)}.upload-zone:hover .upload-icon,.upload-zone.dragover .upload-icon{color:var(--primary-hover)}.upload-zone p{font-size:.9rem;font-weight:500}.upload-zone span{font-size:.75rem;color:var(--text-secondary)}.btn{font-family:inherit;font-size:.85rem;font-weight:600;padding:8px 16px;border-radius:6px;border:none;cursor:pointer;transition:background-color .15s}.btn-primary{background-color:var(--primary-color);color:#fff}.btn-primary:hover{background-color:var(--primary-hover)}.btn-secondary{background-color:var(--secondary-color);color:var(--text-primary)}.btn-secondary:hover{background-color:var(--secondary-hover)}.btn-full{width:100%;padding:10px}.panel{background-color:var(--bg-panel);border:1px solid var(--border-color);border-radius:8px;padding:16px}.panel h2{font-size:.9rem;text-transform:uppercase;letter-spacing:.05em;color:var(--text-secondary);margin-bottom:12px;font-weight:600}.file-details{display:flex;flex-direction:column;gap:10px}.detail-row{display:flex;justify-content:space-between;font-size:.85rem;border-bottom:1px solid rgba(255,255,255,.05);padding-bottom:6px}.detail-row:last-child{border-bottom:none;padding-bottom:0}.detail-row .label{color:var(--text-secondary)}.detail-row .value{font-family:monospace;font-weight:500;color:#fff}.layer-panel{display:flex;flex-direction:column;gap:8px}#file-details,#vector-analysis,.layer-panel,#code-preview-panel{display:none!important}.layer-item{display:flex;align-items:center;gap:10px;font-size:.85rem}.layer-item label{cursor:pointer;display:flex;align-items:center;gap:6px}.layer-item input[type=checkbox]{cursor:pointer}.layer-color-indicator{width:12px;height:12px;border-radius:2px;display:inline-block}.travel-indicator{background-color:var(--travel-color);border:1px dashed rgba(255,255,255,.3)}.cut-indicator{background-color:var(--cut-color)}.viewport-container{grid-area:main;position:relative;width:100%;height:100%;background-color:var(--bg-primary);background-size:20px 20px;background-image:linear-gradient(to right,rgba(255,255,255,.02) 1px,transparent 1px),linear-gradient(to bottom,rgba(255,255,255,.02) 1px,transparent 1px);overflow:hidden;cursor:default;touch-action:none;-webkit-user-select:none;user-select:none}.welcome-overlay{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);text-align:center;color:var(--text-secondary);pointer-events:none;z-index:10}.welcome-overlay h2{font-size:1.5rem;color:var(--text-primary);margin-bottom:8px}#viewport-svg{width:100%;height:100%;display:block}.status-bar{grid-area:status;background-color:var(--bg-secondary);border-top:1px solid var(--border-color);display:flex;align-items:center;padding:0 20px;gap:24px;font-size:.8rem;color:var(--text-secondary)}.status-item{display:flex;align-items:center;gap:6px}.status-label{font-weight:500}.status-value{color:var(--text-primary);font-family:monospace}.chain-list{max-height:200px;overflow-y:auto;display:flex;flex-direction:column;gap:6px;border:1px solid var(--border-color);border-radius:4px;padding:6px;background-color:var(--bg-primary)}.chain-list-item{padding:8px;border-radius:4px;border:1px solid transparent;background-color:var(--bg-secondary);cursor:pointer;display:flex;flex-direction:column;gap:4px;transition:all .15s ease-in-out}.chain-list-item:hover{border-color:var(--primary-hover);background-color:var(--bg-upload)}.chain-list-item.selected{border-color:var(--primary-color);background-color:var(--bg-upload-active)}.chain-title{display:flex;align-items:center;justify-content:space-between;font-size:.8rem;font-weight:600;color:#fff}.chain-meta{display:flex;justify-content:space-between;font-size:.7rem;color:var(--text-secondary)}.chain-type-badge{font-size:.65rem;font-weight:700;padding:1px 5px;border-radius:3px;text-transform:uppercase}.chain-type-badge.closed{background-color:#22c55e26;color:var(--cut-color);border:1px solid rgba(34,197,94,.3)}.chain-type-badge.open{background-color:#409eff26;color:var(--travel-color);border:1px solid rgba(64,158,255,.3)}#viewport-svg path.highlighted,#viewport-svg line.highlighted,#viewport-svg circle.highlighted,#viewport-svg arc.highlighted,#viewport-svg [id].highlighted path,#viewport-svg [id].highlighted line,#viewport-svg [id].highlighted circle{stroke:#f97316!important;stroke-width:3px!important;filter:drop-shadow(0 0 2px rgba(249,115,22,.8))}.show-directions path,.show-directions line,.show-directions polyline{marker-end:url(#arrow-marker)}.show-directions .highlighted{marker-end:url(#arrow-marker-highlighted)!important}.top-nav-left{position:absolute;top:15px;left:15px;z-index:600;display:flex;align-items:center;gap:10px;-webkit-transform:translateZ(0);transform:translateZ(0)}.menu-toggle-btn{background-color:var(--bg-panel);border:1px solid var(--border-color);color:var(--text-primary);border-radius:6px;padding:8px;cursor:pointer;display:flex;align-items:center;justify-content:center;box-shadow:0 4px 6px -1px #00000026,0 2px 4px -1px #0000001a;transition:all .2s cubic-bezier(.4,0,.2,1);height:38px;width:38px;box-sizing:border-box}.menu-toggle-btn:hover{background-color:var(--bg-upload-active);border-color:var(--primary-hover);color:#fff}.menu-toggle-btn:active{transform:scale(.95)}.app-brand-logo{display:inline-flex;align-items:center;gap:6px;padding:0 14px;background:#121826d9;border:1px solid rgba(255,255,255,.12);border-radius:6px;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);box-shadow:0 4px 6px -1px #00000026;-webkit-user-select:none;user-select:none;height:38px;box-sizing:border-box}.app-brand-logo .brand-nc7{color:#38bdf8;font-weight:800;font-size:1.05rem;letter-spacing:-.02em;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif}.app-brand-logo .brand-title{color:#fff;font-weight:700;font-size:1.05rem;letter-spacing:-.01em;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif}.lang-selector-wrap{position:relative;display:inline-block}.lang-selector-btn{background-color:var(--bg-panel);border:1px solid var(--border-color);color:var(--text-primary);border-radius:6px;padding:0 10px;cursor:pointer;display:inline-flex;align-items:center;justify-content:center;gap:6px;font-size:.82rem;font-weight:700;letter-spacing:.05em;box-shadow:0 4px 6px -1px #00000026,0 2px 4px -1px #0000001a;transition:all .2s cubic-bezier(.4,0,.2,1);height:38px;box-sizing:border-box;-webkit-user-select:none;user-select:none}.lang-selector-btn:hover,.lang-selector-wrap.open .lang-selector-btn{background-color:var(--bg-upload-active);border-color:#38bdf8;color:#38bdf8;box-shadow:0 0 10px #38bdf840}.lang-selector-btn:active{transform:scale(.96)}.lang-selector-btn .lang-flag{font-size:1.05rem;line-height:1}.lang-selector-btn .lang-code{color:#38bdf8;font-weight:800}.lang-selector-btn .lang-arrow{color:var(--text-secondary);transition:transform .2s ease}.lang-selector-wrap.open .lang-selector-btn .lang-arrow{transform:rotate(180deg);color:#38bdf8}.lang-dropdown-menu{position:absolute;top:calc(100% + 8px);left:0;min-width:235px;max-height:420px;overflow-y:auto;overscroll-behavior:contain;-webkit-overflow-scrolling:touch;background:#121826f2;border:1px solid rgba(255,255,255,.14);border-radius:8px;backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);box-shadow:0 12px 30px #00000080,0 0 1px 1px #ffffff14;padding:6px;z-index:1000;display:flex;flex-direction:column;gap:3px;opacity:0;pointer-events:none;transform:translateY(-6px) scale(.96);transition:opacity .2s cubic-bezier(.4,0,.2,1),transform .2s cubic-bezier(.4,0,.2,1);scrollbar-width:thin;scrollbar-color:rgba(255,255,255,.2) transparent}.lang-dropdown-menu::-webkit-scrollbar{width:5px}.lang-dropdown-menu::-webkit-scrollbar-thumb{background:#fff3;border-radius:4px}.lang-selector-wrap.open .lang-dropdown-menu{opacity:1;pointer-events:auto;transform:translateY(0) scale(1)}.lang-dropdown-item{display:flex;align-items:center;gap:10px;padding:8px 10px;border-radius:6px;color:var(--text-primary);font-size:.84rem;font-weight:500;cursor:pointer;border:1px solid transparent;transition:all .15s ease;-webkit-user-select:none;user-select:none}.lang-dropdown-item:hover{background:#38bdf826;color:#38bdf8;border-color:#38bdf84d}.lang-dropdown-item.active{background:#38bdf838;color:#38bdf8;font-weight:700;border-color:#38bdf873}.lang-dropdown-item .item-flag{font-size:1.15rem;line-height:1}.lang-dropdown-item .item-name{flex:1;white-space:nowrap}.lang-dropdown-item .item-check{font-size:.8rem;color:#38bdf8;opacity:0}.lang-dropdown-item.active .item-check{opacity:1}.top-floating-bar{position:absolute;top:15px;left:330px;z-index:600;display:flex;align-items:center;gap:8px;flex-wrap:wrap;-webkit-transform:translateZ(0);transform:translateZ(0)}.auto-link-btn,.cutting-dir-btn,.top-sim-btn,.gcode-setup-btn,.export-gcode-btn,.toggle-nodes-btn{position:relative;background-color:var(--bg-panel);border:1px solid var(--border-color);color:var(--text-primary);border-radius:6px;padding:8px 12px;cursor:pointer;display:flex;align-items:center;justify-content:center;gap:6px;font-size:.85rem;font-weight:600;box-shadow:0 4px 6px -1px #00000026,0 2px 4px -1px #0000001a;transition:all .2s cubic-bezier(.4,0,.2,1);white-space:nowrap}.auto-link-btn:hover{background-color:var(--bg-upload-active);border-color:#2dd4bf;color:#2dd4bf}.auto-link-btn:active{transform:scale(.95)}.auto-link-btn.active{background-color:#2dd4bf26;border-color:#2dd4bf;color:#2dd4bf;box-shadow:0 0 10px #2dd4bf66}.toggle-nodes-btn{color:#f87171}.toggle-nodes-btn:hover{background-color:#f8717126;border-color:#f87171}.toggle-nodes-btn:active{transform:scale(.95)}.toggle-nodes-btn.active{color:#f87171;border-color:#f87171;background-color:#f8717126;box-shadow:0 0 10px #f8717159}.toggle-nodes-btn:not(.active){color:var(--text-secondary);border-color:var(--border-color);background-color:var(--bg-panel);opacity:.7}.cutting-dir-btn{color:#a78bfa}.cutting-dir-btn:hover{background-color:#a78bfa26;border-color:#a78bfa;box-shadow:0 0 12px #a78bfa59}.cutting-dir-btn:active{transform:scale(.95)}.cutting-dir-btn.left-cut{color:#fb923c}.cutting-dir-btn.left-cut:hover{background-color:#fb923c26;border-color:#fb923c;box-shadow:0 0 12px #fb923c59}.top-sim-btn{color:#f59e0b}.top-sim-btn:hover{background-color:#f59e0b26;border-color:#f59e0b;box-shadow:0 0 12px #f59e0b59}.top-sim-btn:active{transform:scale(.95)}.top-sim-btn.simulating{background-color:#ef44442e;border-color:#ef4444;color:#f87171;box-shadow:0 0 14px #ef444466}.gcode-setup-btn{color:#c084fc}.gcode-setup-btn:hover{background-color:#c084fc26;border-color:#c084fc;box-shadow:0 0 12px #c084fc59}.gcode-setup-btn:active{transform:scale(.95)}.step-active-pulse{animation:pulseGuide 2s infinite ease-in-out}@keyframes pulseGuide{0%{box-shadow:0 0 #2dd4bf99}50%{box-shadow:0 0 14px 2px #2dd4bfcc}to{box-shadow:0 0 #2dd4bf00}}.top-sim-btn.step-active-pulse{animation:pulseSimGuide 2s infinite ease-in-out}@keyframes pulseSimGuide{0%{box-shadow:0 0 #f59e0b99}50%{box-shadow:0 0 14px 2px #f59e0bcc}to{box-shadow:0 0 #f59e0b00}}.export-gcode-btn{color:#38bdf8}.export-gcode-btn:hover{background-color:#38bdf826;border-color:#38bdf8;box-shadow:0 0 12px #38bdf859}.export-gcode-btn:active{transform:scale(.95)}.export-gcode-btn.ready-to-export{color:#4ade80;border-color:#22c55e;background:#22c55e2e;box-shadow:0 0 16px #22c55e73}.export-gcode-btn.ready-to-export:hover{background:#22c55e47;box-shadow:0 0 20px #22c55e99}@keyframes fadeInBtn{0%{opacity:0;transform:translateY(-4px) scale(.96)}to{opacity:1;transform:translateY(0) scale(1)}}@keyframes popInBtn{0%{opacity:0;transform:scale(.85)}70%{transform:scale(1.06)}to{opacity:1;transform:scale(1)}}@keyframes slideUpSim{0%{opacity:0;transform:translate(-50%,15px)}to{opacity:1;transform:translate(-50%)}}#app.workflow-no-file .top-floating-bar,#app.workflow-no-file .wire-simulator-bar,#app.workflow-step-1 .cutting-dir-btn,#app.workflow-step-1 .top-sim-btn,#app.workflow-step-1 .gcode-setup-btn,#app.workflow-step-1 .export-gcode-btn,#app.workflow-step-1 .wire-simulator-bar,#app.workflow-step-2 .export-gcode-btn{display:none!important}#app.workflow-step-2 .cutting-dir-btn,#app.workflow-step-2 .top-sim-btn,#app.workflow-step-2 .gcode-setup-btn{display:inline-flex!important;animation:fadeInBtn .3s ease}#app.workflow-step-2 .wire-simulator-bar{display:flex!important;animation:slideUpSim .3s ease}#app.workflow-step-3 .wire-simulator-bar{display:flex!important}#app.workflow-step-3 .cutting-dir-btn,#app.workflow-step-3 .top-sim-btn,#app.workflow-step-3 .gcode-setup-btn{display:inline-flex!important}#app.workflow-step-3 .export-gcode-btn{display:inline-flex!important;animation:popInBtn .35s cubic-bezier(.16,1,.3,1)}#app.tutorial-active .cutting-dir-btn,#app.tutorial-active .top-sim-btn,#app.tutorial-active .gcode-setup-btn,#app.tutorial-active .export-gcode-btn{display:inline-flex!important}.alarm-modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;z-index:1000;background:#0a0a10bf;backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px);display:flex;align-items:center;justify-content:center;padding:20px;animation:fadeIn .2s ease-out}.alarm-modal-card{background:#181824;border:1px solid rgba(239,68,68,.4);box-shadow:0 20px 40px -10px #000000b3,0 0 25px #ef444433;border-radius:12px;width:100%;max-width:440px;overflow:hidden;display:flex;flex-direction:column;animation:popIn .25s cubic-bezier(.16,1,.3,1)}.alarm-modal-header{padding:16px 20px;background:#ef444414;border-bottom:1px solid rgba(239,68,68,.15);display:flex;align-items:center;gap:12px}.alarm-modal-icon-badge{font-size:1.4rem;line-height:1}.alarm-modal-title{font-size:1.05rem;font-weight:700;color:#f87171;margin:0}.alarm-modal-body{padding:20px;font-size:.9rem;line-height:1.5;color:#e2e8f0}.alarm-modal-footer{padding:14px 20px;background:#00000040;border-top:1px solid var(--border-color);display:flex;justify-content:flex-end;gap:10px}.btn-alarm-cancel{background:#27273a;border:1px solid var(--border-color);color:#cbd5e1;padding:8px 16px;border-radius:6px;font-weight:600;cursor:pointer;font-size:.85rem;transition:all .15s ease}.btn-alarm-cancel:hover{background:#33334d;color:#fff}.btn-alarm-ok{background:#ef4444;border:1px solid #dc2626;color:#fff;padding:8px 18px;border-radius:6px;font-weight:600;cursor:pointer;font-size:.85rem;transition:all .15s ease}.btn-alarm-ok:hover{background:#dc2626;box-shadow:0 0 10px #ef444480}#viewport-group path,#viewport-group rect,#viewport-group circle,#viewport-group ellipse,#viewport-group line,#viewport-group polyline,#viewport-group polygon{stroke:var(--cut-color)!important;fill:none!important;stroke-width:2.2px!important;vector-effect:non-scaling-stroke!important}#viewport-group.show-node-markers path,#viewport-group.show-node-markers rect,#viewport-group.show-node-markers circle,#viewport-group.show-node-markers ellipse,#viewport-group.show-node-markers line,#viewport-group.show-node-markers polyline,#viewport-group.show-node-markers polygon{marker-start:url(#node-marker)!important;marker-mid:url(#node-marker)!important;marker-end:url(#node-marker)!important}.interactive-bridge-hit{cursor:pointer;pointer-events:stroke!important}.interactive-bridge{cursor:pointer;pointer-events:stroke!important;transition:stroke .15s,stroke-width .15s}.interactive-bridge:hover,.interactive-bridge-hit:hover+.interactive-bridge{stroke:#ef4444!important;stroke-width:4px!important;filter:drop-shadow(0 0 6px rgba(239,68,68,.9))!important}.interactive-bridge.bridge-holding-delete{stroke:#ef4444!important;stroke-width:5px!important;filter:drop-shadow(0 0 10px rgba(239,68,68,1))!important;animation:bridgeHoldPulse .4s ease-in-out infinite alternate}@keyframes bridgeHoldPulse{0%{stroke-width:3.5px;opacity:.8}to{stroke-width:6.5px;opacity:1}}.nc7-node-dot{fill:#4ade80;stroke:#0f172a;stroke-width:1px;vector-effect:non-scaling-stroke;cursor:crosshair;transition:fill .15s,stroke .15s,stroke-width .15s}.nc7-node-dot.manual-node{fill:#38bdf8;stroke:#0369a1;stroke-width:1.5px}.nc7-node-dot.start-node{fill:#3b82f6;stroke:#fff;stroke-width:1.5px;cursor:pointer;filter:drop-shadow(0 0 4px rgba(59,130,246,.7))}.nc7-node-dot.start-node:hover{fill:#60a5fa!important;stroke:#00f5d4!important;stroke-width:2.5px!important}.nc7-node-dot.intermediate-node{fill:#86efac;stroke:#166534;stroke-width:.75px;opacity:.85}.nc7-node-dot:hover{fill:#facc15!important;stroke:#fff!important;stroke-width:2px!important;opacity:1!important}#node-snap-indicator{pointer-events:none;filter:drop-shadow(0 0 6px rgba(0,245,212,.8))}#rubberband-line{pointer-events:none;filter:drop-shadow(0 0 4px rgba(0,245,212,.7))}#rubberband-tip{pointer-events:none;filter:drop-shadow(0 0 6px rgba(0,245,212,.9))}.nc7-context-menu{position:fixed;z-index:1000;background-color:#1e1e24;border:1px solid #383842;border-radius:8px;box-shadow:0 10px 25px #00000080,0 0 1px #fff3;padding:6px;min-width:190px;display:flex;flex-direction:column;gap:2px;animation:contextMenuFadeIn .12s ease-out;font-family:var(--font-family)}@keyframes contextMenuFadeIn{0%{opacity:0;transform:scale(.96)}to{opacity:1;transform:scale(1)}}.nc7-context-item{display:flex;align-items:center;gap:10px;padding:8px 12px;border-radius:6px;font-size:.85rem;color:#e4e4eb;cursor:pointer;transition:background .15s,color .15s;-webkit-user-select:none;user-select:none}.nc7-context-item:hover{background-color:#3b82f6;color:#fff}.nc7-context-item.node-info{background:#ffffff0d;cursor:default;border-left:3px solid #00f5d4;padding-left:9px}.nc7-context-item.node-info:hover{background:#ffffff14;color:#e4e4eb}.nc7-context-item.danger:hover{background-color:#ef4444;color:#fff}.nc7-context-item.disabled{opacity:.5;cursor:default;pointer-events:none}.nc7-context-separator{height:1px;background-color:#383842;margin:4px 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