:root{--primary-color: #3498db;--success-color: #27ae60;--danger-color: #e74c3c;--border-color: #ddd;--bg-color: #f5f5f5;--panel-bg: #ffffff;--text-color: #333;--hover-color: #2980b9;--active-color: #2ecc71;--grid-color: #e0e0e0;--shadow: 0 2px 8px rgba(0, 0, 0, .1)}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;background-color:var(--bg-color);color:var(--text-color);overflow:hidden}#app{display:flex;flex-direction:column;height:100vh}.toolbar{display:flex;align-items:center;gap:8px;padding:8px 16px;background:var(--panel-bg);border-bottom:1px solid var(--border-color);box-shadow:var(--shadow);flex-wrap:wrap;z-index:100}.toolbar-group{display:flex;align-items:center;gap:4px;padding:0 8px;border-right:1px solid var(--border-color)}.toolbar-group:last-child{border-right:none}.toolbar-group.ml-auto{margin-left:auto}.app-title{font-size:18px;font-weight:600;color:var(--primary-color);margin:0}.tool-btn{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;padding:8px 12px;background:transparent;border:2px solid transparent;border-radius:6px;cursor:pointer;transition:all .2s;font-size:11px;color:var(--text-color);min-width:60px}.tool-btn:hover{background:var(--bg-color);border-color:var(--border-color)}.tool-btn.active{background:var(--primary-color);color:#fff;border-color:var(--primary-color)}.tool-btn:disabled,.tool-btn.disabled{opacity:.5;cursor:not-allowed;pointer-events:none}.tool-btn svg{width:24px;height:24px}.btn{padding:8px 16px;background:#fff;border:1px solid var(--border-color);border-radius:4px;cursor:pointer;font-size:14px;transition:all .2s;color:var(--text-color)}.btn:hover{background:var(--bg-color);border-color:var(--primary-color)}.btn-primary{background:var(--primary-color);color:#fff;border-color:var(--primary-color)}.btn-primary:hover{background:var(--hover-color)}.btn-success{background:var(--success-color);color:#fff;border-color:var(--success-color)}.btn-success:hover{background:#229954}.main-content{display:flex;flex:1;overflow:hidden}.canvas-container{flex:1;display:flex;flex-direction:column;background:var(--bg-color);position:relative;overflow:auto;align-items:center;justify-content:flex-start;padding:16px}canvas{background:#fff;display:block;box-shadow:var(--shadow);border-radius:4px;cursor:crosshair;image-rendering:pixelated;flex-shrink:0}canvas.select-mode{cursor:default}canvas.moving{cursor:move}.status-bar{display:flex;align-items:center;gap:16px;padding:8px 16px;background:var(--panel-bg);border-top:1px solid var(--border-color);font-size:12px;color:#666}.status-bar span{padding:0 8px;border-right:1px solid var(--border-color)}.status-bar span:last-child{border-right:none}#status-message{color:var(--primary-color);font-weight:500}.property-panel{width:320px;background:var(--panel-bg);border-left:1px solid var(--border-color);display:flex;flex-direction:column;overflow:hidden;transition:width .3s ease;position:relative}.property-panel.collapsed{width:40px}.property-panel.collapsed .panel-content-wrapper{display:none}.panel-header{display:flex;align-items:center;justify-content:space-between;padding:16px;border-bottom:1px solid var(--border-color);background:var(--panel-bg);position:relative}.property-panel.collapsed .panel-header{padding:16px 8px;flex-direction:column;gap:8px}.panel-title{margin:0;font-size:16px;font-weight:600;white-space:nowrap}.property-panel.collapsed .panel-title{writing-mode:vertical-rl;text-orientation:mixed;font-size:14px}.btn-toggle-panel{background:transparent;border:none;cursor:pointer;padding:4px;display:flex;align-items:center;justify-content:center;color:#666;transition:color .2s,transform .3s ease}.btn-toggle-panel:hover{color:var(--primary-color)}.toggle-icon{transition:transform .3s ease}.property-panel.collapsed .toggle-icon{transform:rotate(180deg)}.panel-content-wrapper{flex:1;overflow-y:auto;display:flex;flex-direction:column}.property-content{flex:1;padding:16px;overflow-y:auto}.placeholder{color:#999;font-size:14px;text-align:center;padding:32px 16px}.property-group{margin-bottom:20px}.property-group-title{font-size:13px;font-weight:600;color:#666;text-transform:uppercase;margin-bottom:12px;padding-bottom:6px;border-bottom:1px solid var(--border-color)}.property-field{margin-bottom:12px}.property-field label{display:block;font-size:13px;font-weight:500;margin-bottom:4px;color:#555}.property-field input,.property-field select{width:100%;padding:8px;border:1px solid var(--border-color);border-radius:4px;font-size:13px;font-family:inherit;transition:border-color .2s}.property-field input:focus,.property-field select:focus{outline:none;border-color:var(--primary-color)}.property-field input[type=checkbox]{width:auto;margin-right:8px}.property-field-inline{display:flex;align-items:center}.property-field-inline label{margin-bottom:0;margin-left:8px}.input-group{display:grid;grid-template-columns:1fr 1fr;gap:8px}.input-group-3{display:grid;grid-template-columns:1fr 1fr 1fr;gap:8px}.vertex-field{margin-bottom:10px;padding:8px;background:var(--hover-bg);border-radius:4px;border:1px solid var(--border-color)}.vertex-field label{display:block;font-size:12px;font-weight:600;margin-bottom:6px;color:#555}.hint{font-size:12px;color:#999;font-style:italic;margin-top:8px;padding:8px;background:var(--hover-bg);border-left:3px solid var(--primary-color);border-radius:3px}.btn-group{display:flex;gap:8px;margin-top:16px}.btn-group .btn{flex:1}.property-content::-webkit-scrollbar{width:8px}.property-content::-webkit-scrollbar-track{background:var(--bg-color)}.property-content::-webkit-scrollbar-thumb{background:#ccc;border-radius:4px}.property-content::-webkit-scrollbar-thumb:hover{background:#999}.hint{font-size:12px;color:#999;margin-top:4px;font-style:italic}.object-info{background:var(--bg-color);padding:12px;border-radius:4px;margin-bottom:16px}.object-info-row{display:flex;justify-content:space-between;margin-bottom:4px;font-size:13px}.object-info-label{font-weight:500;color:#666}.object-info-value{color:var(--text-color);font-family:Courier New,monospace}@media (max-width: 1200px){.property-panel{width:280px}.tool-btn span{display:none}.tool-btn{min-width:40px;padding:8px}}@media (max-width: 768px){.main-content{flex-direction:column}.property-panel{width:100%;max-height:300px;border-left:none;border-top:1px solid var(--border-color)}canvas{margin:8px}}.view-settings{padding:16px;background:#f8f9fa;border-bottom:2px solid var(--border-color)}.view-settings-title{font-size:14px;font-weight:600;margin-bottom:12px;color:#333}.view-settings .property-field{margin-bottom:16px}.view-settings label{display:flex;justify-content:space-between;align-items:center;font-size:13px;font-weight:500;margin-bottom:6px;color:#555}.view-settings label span{color:var(--primary-color);font-weight:600;font-family:Courier New,monospace}.view-settings input[type=range]{width:100%;height:6px;border-radius:3px;background:#ddd;outline:none;-webkit-appearance:none}.view-settings input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;appearance:none;width:16px;height:16px;border-radius:50%;background:var(--primary-color);cursor:pointer;transition:background .2s}.view-settings input[type=range]::-webkit-slider-thumb:hover{background:var(--hover-color)}.view-settings input[type=range]::-moz-range-thumb{width:16px;height:16px;border-radius:50%;background:var(--primary-color);cursor:pointer;border:none;transition:background .2s}.view-settings input[type=range]::-moz-range-thumb:hover{background:var(--hover-color)}.view-settings .hint{font-size:11px;color:#999;margin-top:4px}.btn-small{padding:6px 12px;font-size:12px;width:100%}.preview-controls{position:absolute;top:16px;left:50%;transform:translate(-50%);background:#fffffff2;padding:12px 20px;border-radius:8px;box-shadow:0 4px 12px #00000026;display:flex;align-items:center;gap:12px;z-index:1000;border:2px solid var(--success-color)}.preview-controls .btn-small{width:auto;min-width:80px}.preview-info{font-size:13px;font-weight:500;color:var(--success-color);margin-left:8px;animation:pulse 2s ease-in-out infinite}@keyframes pulse{0%,to{opacity:1}50%{opacity:.6}}.btn-danger{background:var(--danger-color);color:#fff;border-color:var(--danger-color)}.btn-danger:hover{background:#c0392b;border-color:#c0392b}.property-field input[type=number]::-webkit-inner-spin-button,.property-field input[type=number]::-webkit-outer-spin-button{opacity:1}.btn:disabled{opacity:.5;cursor:not-allowed}#demo-canvas{position:absolute;top:16px;left:16px}