:root{--color-room: #E69F00;--color-door: #009E73;--color-corridor: #CC79A7;--color-outside: #56B4E9;--color-transition: #D55E00;--bg-primary: #f8f9fa;--bg-card: #ffffff;--bg-sidebar: #ffffff;--border-color: #dee2e6;--text-primary: #212529;--text-secondary: #6c757d;--accent: #0d6efd;--accent-hover: #0b5ed7;--sidebar-width: 320px}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;background:var(--bg-primary);color:var(--text-primary);line-height:1.5}.app{display:flex;flex-direction:column;height:100vh;overflow:hidden}.header{display:flex;align-items:center;justify-content:space-between;padding:12px 24px;background:var(--bg-card);border-bottom:1px solid var(--border-color);flex-shrink:0}.header h1{font-size:1.25rem;font-weight:700;letter-spacing:-.01em}.header h1 span{color:var(--accent)}.header-subtitle{font-size:.8rem;color:var(--text-secondary)}.main-content{flex:1;display:flex;overflow:hidden}.results-layout{display:flex;width:100%;height:100%}.graph-area{flex:1;position:relative;background:#fff;overflow:hidden}.sidebar{width:var(--sidebar-width);min-width:var(--sidebar-width);background:var(--bg-sidebar);overflow-y:auto;padding:16px;display:flex;flex-direction:column;gap:16px}.sidebar-left{border-right:1px solid var(--border-color)}.sidebar-right{border-left:1px solid var(--border-color)}.panel{background:var(--bg-card);border:1px solid var(--border-color);border-radius:8px;padding:16px}.panel h3{font-size:.85rem;font-weight:600;text-transform:uppercase;letter-spacing:.04em;color:var(--text-secondary);margin-bottom:12px}.upload-container{display:flex;flex-direction:column;align-items:center;justify-content:flex-start;width:100%;height:100%;padding:48px 40px;overflow-y:auto}.intro{text-align:center;max-width:680px;margin-bottom:28px}.intro-title{font-size:2rem;font-weight:700;letter-spacing:-.02em;margin-bottom:14px}.intro-title span{color:var(--accent)}.intro-abstract{font-size:.95rem;color:var(--text-secondary);line-height:1.6}.intro-footer{margin-top:36px;padding-bottom:8px;font-size:.8rem;color:var(--text-secondary);text-align:center}.intro-footer a{color:var(--accent);text-decoration:none}.intro-footer a:hover{text-decoration:underline}.dropzone{width:100%;max-width:600px;border:2px dashed var(--border-color);border-radius:12px;padding:48px 32px;text-align:center;cursor:pointer;transition:border-color .2s,background .2s}.dropzone:hover,.dropzone.drag-over{border-color:var(--accent);background:#0d6efd0a}.dropzone-icon{display:block;margin:0 auto 14px;color:var(--accent);opacity:.85;transition:transform .2s,opacity .2s}.dropzone:hover .dropzone-icon,.dropzone.drag-over .dropzone-icon{opacity:1;transform:translateY(-2px)}.dropzone-text{font-size:1rem;color:var(--text-secondary);margin-bottom:8px}.dropzone-sub{font-size:.8rem;color:var(--text-secondary)}.examples-section{margin-top:32px;width:100%;max-width:600px}.examples-section h2{font-size:.95rem;font-weight:600;margin-bottom:16px;color:var(--text-primary)}.example-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}.example-card{position:relative;border:1px solid var(--border-color);border-radius:8px;overflow:hidden;cursor:pointer;transition:box-shadow .2s,border-color .2s;background:var(--bg-card)}.example-card:hover{border-color:var(--accent);box-shadow:0 2px 8px #00000014}.example-card img{width:100%;height:100px;object-fit:cover;display:block}.example-card-info{padding:8px 10px}.example-card-name{font-size:.78rem;font-weight:500;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.example-card-meta{font-size:.7rem;color:var(--text-secondary);display:flex;justify-content:space-between;align-items:center;margin-top:4px}.cached-badge{background:#d4edda;color:#155724;font-size:.65rem;font-weight:600;padding:1px 6px;border-radius:4px}.processing-overlay{display:flex;flex-direction:column;align-items:center;justify-content:center;width:100%;height:100%;gap:16px}.spinner{width:48px;height:48px;border:4px solid var(--border-color);border-top-color:var(--accent);border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.processing-text{font-size:1rem;color:var(--text-secondary)}.processing-stage{font-size:.85rem;color:var(--accent);font-weight:500}.error-container{display:flex;flex-direction:column;align-items:center;justify-content:center;width:100%;height:100%;gap:12px}.error-message{color:#dc3545;font-size:.95rem;max-width:400px;text-align:center}.type-toggle{display:flex;align-items:center;gap:8px;padding:4px 0}.type-toggle label{font-size:.82rem;cursor:pointer;display:flex;align-items:center;gap:6px}.type-swatch{display:inline-block;width:12px;height:12px;border-radius:3px}.type-control-group{padding:2px 0}.size-slider{display:flex;align-items:center;gap:6px;padding-left:24px}.size-slider input[type=range]{flex:1;height:4px;-webkit-appearance:none;-moz-appearance:none;appearance:none;background:var(--border-color);border-radius:2px;outline:none}.size-slider input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;width:14px;height:14px;border-radius:50%;background:var(--accent);cursor:pointer}.size-slider input[type=range]::-moz-range-thumb{width:14px;height:14px;border-radius:50%;background:var(--accent);cursor:pointer;border:none}.size-value{font-size:.72rem;color:var(--text-secondary);min-width:20px;text-align:right}.stat-row{display:flex;justify-content:space-between;padding:4px 0;font-size:.82rem}.stat-row .label{color:var(--text-secondary)}.stat-row .value{font-weight:600}.stat-divider{border:none;border-top:1px solid var(--border-color);margin:8px 0}.export-buttons{display:flex;gap:8px}.btn{padding:8px 16px;border:1px solid var(--border-color);border-radius:6px;background:var(--bg-card);cursor:pointer;font-size:.82rem;font-weight:500;transition:background .15s,border-color .15s}.btn:hover{background:var(--bg-primary);border-color:var(--accent)}.btn-primary{background:var(--accent);color:#fff;border-color:var(--accent)}.btn-primary:hover{background:var(--accent-hover)}.btn-block{width:100%}.node-tooltip{position:absolute;z-index:1000;background:#212529f2;color:#fff;padding:8px 12px;border-radius:6px;font-size:.75rem;line-height:1.5;pointer-events:none;max-width:220px;white-space:nowrap}.tooltip-type{font-weight:600;text-transform:capitalize}.stage-label{font-size:.78rem;font-weight:500;color:var(--text-secondary);display:block;margin-bottom:6px}.stage-toggle{display:flex;gap:0;border:1px solid var(--border-color);border-radius:6px;overflow:hidden}.stage-btn{flex:1;padding:6px 12px;font-size:.78rem;font-weight:500;border:none;background:var(--bg-card);cursor:pointer;transition:background .15s,color .15s;color:var(--text-secondary)}.stage-btn:not(:last-child){border-right:1px solid var(--border-color)}.stage-btn.active{background:var(--accent);color:#fff}.stage-btn:hover:not(.active){background:var(--bg-primary)}.back-btn-row{padding:8px 0}.route-hint{font-size:.72rem;color:var(--text-secondary);margin-bottom:12px;line-height:1.4}.route-field{display:flex;align-items:center;gap:6px;font-size:.78rem;font-weight:500;margin-bottom:8px}.route-dot{display:inline-block;width:10px;height:10px;border-radius:50%;flex-shrink:0}.route-select{flex:1;min-width:0;padding:5px 8px;font-size:.78rem;border:1px solid var(--border-color);border-radius:6px;background:var(--bg-card);color:var(--text-primary);cursor:pointer}.route-select:focus{outline:none;border-color:var(--accent)}.route-buttons{display:flex;gap:8px;margin-top:4px}.route-buttons .btn{flex:1}.route-buttons .btn:disabled{opacity:.5;cursor:not-allowed}.route-result{margin-top:12px;padding:10px 12px;border:1px solid var(--border-color);border-left:3px solid var(--accent);border-radius:6px;background:var(--bg-primary)}.route-result-fail{border-left-color:#dc3545;font-size:.78rem;color:#dc3545}.route-result-row{display:flex;justify-content:space-between;font-size:.8rem;padding:2px 0}.route-result-row .label{color:var(--text-secondary)}.route-result-row .value{font-weight:600}.route-badge{display:inline-block;margin-top:6px;background:#fde2d4;color:#8a3b12;font-size:.68rem;font-weight:600;padding:2px 8px;border-radius:4px}.header-left{display:flex;align-items:center;gap:14px}.back-btn{display:inline-flex;align-items:center;gap:4px;padding:6px 12px;border:1px solid var(--border-color);border-radius:6px;background:var(--bg-card);cursor:pointer;font-size:.82rem;font-weight:500;transition:background .15s,border-color .15s}.back-btn:hover{background:var(--bg-primary);border-color:var(--accent)}.back-arrow{font-size:1.1rem;line-height:1}.panel-collapse-header{display:flex;align-items:center;justify-content:space-between;width:100%;background:none;border:none;padding:0;margin:0;cursor:pointer}.panel-collapse-header h3{margin-bottom:0}.panel-collapse-header .chevron{color:var(--text-secondary);transition:transform .18s;font-size:1rem}.panel-collapse-header .chevron.open{transform:rotate(90deg)}.panel-collapse-body{margin-top:12px}.stat-image{max-width:150px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.opacity-slider{padding-left:0;margin-top:6px}.opacity-label{font-size:.72rem;color:var(--text-secondary);min-width:48px}.canvas-toolbar{position:absolute;right:14px;bottom:14px;display:flex;align-items:center;gap:4px;background:#fffffff2;border:1px solid var(--border-color);border-radius:8px;padding:4px;box-shadow:0 2px 8px #0000001f;z-index:50}.zoom-btn{min-width:30px;height:30px;padding:0 8px;border:none;border-radius:6px;background:transparent;cursor:pointer;font-size:1.1rem;font-weight:600;color:var(--text-primary);display:inline-flex;align-items:center;justify-content:center}.zoom-btn:hover{background:var(--bg-primary)}.zoom-btn.fit-btn{font-size:.8rem;font-weight:600;border-left:1px solid var(--border-color);margin-left:2px}.zoom-readout{font-size:.74rem;color:var(--text-secondary);min-width:42px;text-align:center}.mode-banner{position:absolute;top:14px;left:50%;transform:translate(-50%);background:var(--accent);color:#fff;padding:7px 16px;border-radius:999px;font-size:.8rem;font-weight:500;box-shadow:0 2px 8px #0d6efd4d;z-index:50;pointer-events:none}.route-pick{display:flex;align-items:center;gap:8px;margin-bottom:8px}.route-pick-btn{display:inline-flex;align-items:center;gap:6px;flex:0 0 auto;min-width:130px}.route-pick-btn.arming{background:var(--accent);color:#fff;border-color:var(--accent)}.route-current{font-size:.78rem;color:var(--text-secondary);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.route-advanced{margin-top:10px}.route-advanced summary{font-size:.74rem;color:var(--text-secondary);cursor:pointer;margin-bottom:8px}.edit-tools{display:flex;gap:6px;margin-bottom:6px}.edit-tool{flex:1;padding:7px 6px;border:1px solid var(--border-color);border-radius:6px;background:var(--bg-card);cursor:pointer;font-size:.78rem;font-weight:500;transition:background .15s,color .15s,border-color .15s}.edit-tool:hover{border-color:var(--accent)}.edit-tool.active{background:var(--accent);color:#fff;border-color:var(--accent)}.edit-nodetype{margin-top:10px}.nodetype-grid{display:grid;grid-template-columns:1fr 1fr;gap:6px;margin-top:6px}.nodetype-chip{display:inline-flex;align-items:center;gap:6px;padding:6px 8px;border:1px solid var(--border-color);border-radius:6px;background:var(--bg-card);cursor:pointer;font-size:.74rem;transition:border-color .15s,background .15s}.nodetype-chip.active{border-color:var(--accent);background:#0d6efd0f;font-weight:600}.edit-hint{margin-top:10px;padding:8px 10px;background:var(--bg-primary);border-left:3px solid var(--accent);border-radius:6px;font-size:.76rem;color:var(--text-primary)}.edit-undo-note{margin-top:10px;font-size:.7rem;color:var(--text-secondary);line-height:1.4}.conn-ok{color:#1a7f37;font-weight:700;margin-left:4px}.conn-warn{border:none;background:none;cursor:pointer;color:#d39e00;font-size:.95rem;margin-left:4px;padding:0 2px;line-height:1}.conn-warn:hover{color:#b8860b}.conn-list{margin:6px 0 4px;padding:8px;background:#fff8e6;border:1px solid #f0d98c;border-radius:6px}.conn-list-title{font-size:.72rem;color:#7a5b00;margin-bottom:6px;line-height:1.4}.conn-node{display:inline-flex;align-items:center;gap:6px;width:100%;text-align:left;border:none;background:none;cursor:pointer;font-size:.74rem;color:var(--text-primary);padding:3px 4px;border-radius:4px}.conn-node:hover{background:#0000000d}.conn-more{font-size:.7rem;color:var(--text-secondary);margin-top:4px;padding-left:4px}.conn-flag{color:#b02a37;font-weight:700}.conn-locate{margin-top:4px;font-style:italic}.conn-node-id{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.conn-reason{font-size:.64rem;font-weight:600;padding:1px 6px;border-radius:4px;flex-shrink:0}.conn-reason-isolated{background:#f8d7da;color:#842029}.conn-reason-room{background:#fff3cd;color:#664d03}.conn-reason-exit{background:#cfe2ff;color:#084298}