:root{--bg-primary:#1e1e1e;--bg-secondary:#252526;--bg-tertiary:#3c3c3c;--bg-hover:#4c4c4c;--bg-item-hover:#2a2a2a;--accent:#007acc;--accent-hover:#005a9e;--accent-light:#4fc3f7;--accent-overlay:rgba(0, 122, 204, 0.5);--accent-subtle:rgba(0, 122, 204, 0.15);--accent-border:rgba(0, 122, 204, 0.3);--accent-glow:rgba(0, 122, 204, 0.3);--text-primary:#fff;--text-muted:#aaa;--text-dim:#888;--text-selected:#ccc;--border:#3c3c3c;--border-input:#555;--border-handle:#555;--danger:#c72e2e;--danger-hover:#ff4444;--danger-dark:#a02525;--success:#2d7d2d;--success-hover:#3d9d3d;--align-bg:#2d5a2d;--align-hover:#3d7a3d;--toggle-bg:#5a4a2d;--toggle-hover:#6a5a3d;--toggle-active:#2d7a5a;--undo-bg:#5a5a2d;--undo-hover:#7a7a3d;--disabled-bg:#3a3a3a;--snap-bg:rgba(255, 165, 0, 0.9);--modal-shadow:0 10px 30px rgba(0, 0, 0, 0.5);--scrollbar-thumb:#555;--scrollbar-track:var(--bg-primary);--toolbar-width:280px;--toolbar-min-width:200px;--properties-width:220px;--properties-min-width:180px;--radius-sm:3px;--radius-md:4px;--radius-lg:8px;--radius-xl:12px;--transition-fast:0.2s}*{margin:0;padding:0;box-sizing:border-box}body{font-family:'Segoe UI',Tahoma,Geneva,Verdana,sans-serif;background:var(--bg-primary);color:var(--text-primary);display:flex;height:100vh;overflow:hidden}.toolbar{width:var(--toolbar-width);background:var(--bg-secondary);padding:12px;border-right:1px solid var(--border);display:flex;flex-direction:column;gap:8px;overflow-y:auto;max-height:100vh;position:relative;min-width:var(--toolbar-min-width);scrollbar-width:thin;scrollbar-color:var(--scrollbar-thumb) var(--scrollbar-track)}.toolbar::-webkit-scrollbar{width:8px}.toolbar::-webkit-scrollbar-track{background:var(--scrollbar-track)}.toolbar::-webkit-scrollbar-thumb{background:var(--scrollbar-thumb);border-radius:var(--radius-md)}.toolbar-resize-handle{position:absolute;right:0;top:0;bottom:0;width:8px;cursor:col-resize;background:0 0;z-index:100;transition:background var(--transition-fast)}.toolbar-resize-handle.resizing,.toolbar-resize-handle:hover{background:var(--accent-overlay)}.toolbar-resize-handle::after{content:'';position:absolute;left:3px;top:50%;transform:translateY(-50%);width:2px;height:30px;background:var(--border-handle);border-radius:1px}.toolbar h3{margin:8px 0 10px;color:var(--accent);font-size:12px;text-transform:uppercase;letter-spacing:1px;padding-bottom:6px;border-bottom:1px solid var(--border)}#partsList{margin-top:8px;max-height:none;min-height:400px;flex:1;overflow-y:auto;background:var(--bg-primary);border:1px solid var(--border);border-radius:var(--radius-md);padding:8px;scrollbar-width:thin;scrollbar-color:var(--scrollbar-thumb) var(--scrollbar-track)}#partsList::-webkit-scrollbar{width:8px}#partsList::-webkit-scrollbar-track{background:var(--scrollbar-track)}#partsList::-webkit-scrollbar-thumb{background:var(--scrollbar-thumb);border-radius:var(--radius-md)}.tool-btn{width:100%;padding:6px 4px;background:var(--bg-tertiary);border:none;color:var(--text-primary);cursor:pointer;border-radius:var(--radius-md);transition:all var(--transition-fast);text-align:center;display:inline-flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;font-size:10px;min-height:50px}.tool-btn:hover{background:var(--bg-hover)}.tool-btn.active{background:var(--accent)}.tool-btn:focus-visible{outline:2px solid var(--accent-light);outline-offset:2px}.tool-btn .icon{width:24px;height:24px;display:flex;align-items:center;justify-content:center;color:var(--text-primary)}.tool-btn .icon svg *{stroke:currentColor;fill:none;stroke-width:2}.tools-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:4px;margin-bottom:10px}.align-btn{padding:8px 12px;background:var(--align-bg);border:none;color:var(--text-primary);cursor:pointer;border-radius:var(--radius-md);transition:all var(--transition-fast);font-size:12px;margin-top:5px;width:100%}.align-btn:hover{background:var(--align-hover)}.align-btn:disabled{background:var(--disabled-bg);cursor:not-allowed;opacity:.5}.align-btn:focus-visible{outline:2px solid var(--accent-light);outline-offset:2px}.toggle-btn{padding:8px 12px;background:var(--toggle-bg);border:none;color:var(--text-primary);cursor:pointer;border-radius:var(--radius-md);transition:all var(--transition-fast);font-size:12px;margin-top:5px;width:100%}.toggle-btn.active{background:var(--toggle-active)}.toggle-btn:hover{background:var(--toggle-hover)}.toggle-btn:focus-visible{outline:2px solid var(--accent-light);outline-offset:2px}.undo-btn{padding:8px 12px;background:var(--undo-bg);border:none;color:var(--text-primary);cursor:pointer;border-radius:var(--radius-md);transition:all var(--transition-fast);font-size:12px;margin-top:5px;width:100%}.undo-btn:hover{background:var(--undo-hover)}.undo-btn:disabled{background:var(--disabled-bg);cursor:not-allowed;opacity:.5}.undo-btn:focus-visible{outline:2px solid var(--accent-light);outline-offset:2px}.properties-panel{width:var(--properties-width);background:var(--bg-secondary);padding:15px;border-left:1px solid var(--border);display:flex;flex-direction:column;gap:15px;position:relative;min-width:var(--properties-min-width);overflow-y:scroll;scrollbar-width:thin;scrollbar-color:var(--scrollbar-thumb) var(--scrollbar-track)}.properties-panel-resize-handle{position:absolute;left:0;top:0;bottom:0;width:8px;cursor:col-resize;background:0 0;z-index:100;transition:background var(--transition-fast)}.properties-panel-resize-handle.resizing,.properties-panel-resize-handle:hover{background:var(--accent-overlay)}.properties-panel-resize-handle::after{content:'';position:absolute;left:3px;top:50%;transform:translateY(-50%);width:2px;height:30px;background:var(--border-handle);border-radius:1px}.properties-panel::-webkit-scrollbar{width:6px}.properties-panel::-webkit-scrollbar-track{background:var(--scrollbar-track);border-radius:3px}.properties-panel::-webkit-scrollbar-thumb{background:var(--scrollbar-thumb);border-radius:3px}.properties-panel::-webkit-scrollbar-thumb:hover{background:#777}.properties-panel h3{color:var(--accent);font-size:14px;margin-bottom:10px;text-transform:uppercase;letter-spacing:1px}.prop-group{display:flex;flex-direction:column;gap:8px}.prop-group label{font-size:12px;color:var(--text-muted)}.prop-group input{padding:8px;background:var(--bg-tertiary);border:1px solid var(--border-input);color:var(--text-primary);border-radius:var(--radius-md);font-size:13px}.prop-group input:focus{outline:0;border-color:var(--accent);box-shadow:0 0 0 2px var(--accent-glow)}.action-btn{padding:10px 15px;background:var(--accent);border:none;color:var(--text-primary);cursor:pointer;border-radius:var(--radius-md);transition:background var(--transition-fast);font-size:13px;width:100%}.action-btn:hover{background:var(--accent-hover)}.action-btn:focus-visible{outline:2px solid var(--accent-light);outline-offset:2px}.action-btn.danger{background:var(--danger)}.action-btn.danger:hover{background:var(--danger-dark)}.action-btn.success{background:var(--success)}.action-btn.success:hover{background:var(--success-hover)}.main-area{flex:1;display:flex;flex-direction:column}.canvas-container{flex:1;position:relative;background:var(--bg-primary);overflow:hidden}#canvas{display:block;cursor:crosshair}.status-bar{height:30px;background:var(--accent);display:flex;align-items:center;justify-content:space-between;padding:0 15px;font-size:12px;gap:15px}.status-left{display:flex;align-items:center;gap:15px}.status-right{display:flex;align-items:center;gap:15px;color:var(--text-primary)}.status-item{display:flex;align-items:center;gap:5px}.objects-list{flex:1;overflow-y:auto;background:var(--bg-primary);border:1px solid var(--border);border-radius:var(--radius-md);scrollbar-width:thin;scrollbar-color:var(--scrollbar-thumb) var(--scrollbar-track)}.objects-list::-webkit-scrollbar{width:8px}.objects-list::-webkit-scrollbar-track{background:var(--scrollbar-track)}.objects-list::-webkit-scrollbar-thumb{background:var(--scrollbar-thumb);border-radius:var(--radius-md)}.object-item{padding:8px 10px;border-bottom:1px solid var(--border);cursor:pointer;font-size:12px;display:flex;justify-content:space-between;align-items:center}.object-item:hover{background:var(--bg-item-hover)}.object-item.selected{background:var(--accent)}.object-item.selected small{color:var(--text-selected)}.object-item .delete-obj{background:var(--danger);border:none;color:var(--text-primary);width:20px;height:20px;border-radius:var(--radius-sm);cursor:pointer;font-size:14px}.object-item .delete-obj:hover{background:var(--danger-hover)}.object-item .obj-color-swatch{flex-shrink:0;transition:background .15s}.object-item .color-picker-btn{transition:border-color .15s,box-shadow .15s}.object-item .color-picker-btn:hover{border-color:#007acc!important}.object-item .color-picker-btn:focus{border-color:#0af!important;box-shadow:0 0 0 1px rgba(0,170,255,.3);outline:0}.color-dropdown.open button:hover{filter:brightness(1.3);transform:scale(1.15)}.color-dropdown-scroll::-webkit-scrollbar{width:6px}.color-dropdown-scroll::-webkit-scrollbar-track{background:#1e1e1e;border-radius:3px}.color-dropdown-scroll::-webkit-scrollbar-thumb{background:#555;border-radius:3px}.color-dropdown-scroll::-webkit-scrollbar-thumb:hover{background:#777}.dimension-label{position:fixed;background:rgba(0,122,204,.9);color:var(--text-primary);padding:6px 12px;border-radius:var(--radius-md);font-size:13px;font-weight:700;pointer-events:none;z-index:1000;white-space:nowrap;box-shadow:0 2px 8px rgba(0,0,0,.3);transform:translate(-50%,-100%);margin-top:-8px;display:none}#lineDimensionInput{position:fixed;transform:translate(-50%,-100%);margin-top:-35px;z-index:1001;background:var(--bg-primary);color:var(--text-primary);border:1px solid var(--accent);border-radius:var(--radius-md);padding:6px 10px;font-size:13px;font-family:Consolas,monospace;width:140px;text-align:center;box-shadow:0 2px 8px rgba(0,0,0,.4);outline:0}#lineDimensionInput::placeholder{color:var(--text-dim);font-size:11px}#lineDimensionInput:focus{border-color:var(--accent-light);box-shadow:0 0 0 2px var(--accent-glow)}.snap-indicator{position:fixed;background:var(--snap-bg);color:var(--text-primary);padding:4px 8px;border-radius:var(--radius-md);font-size:11px;pointer-events:none;z-index:1000;transform:translate(-50%,-100%);margin-top:-8px}.multi-select-info{background:var(--accent);padding:10px;border-radius:var(--radius-md);font-size:12px;text-align:center;margin-bottom:10px}.modal-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background:rgba(0,0,0,.7);display:flex;align-items:center;justify-content:center;z-index:10000}.modal-window{background:var(--bg-secondary);border:1px solid var(--border);border-radius:var(--radius-lg);max-width:600px;max-height:80vh;display:flex;flex-direction:column;box-shadow:var(--modal-shadow)}.modal-header{padding:15px 20px;border-bottom:1px solid var(--border);display:flex;justify-content:space-between;align-items:center}.modal-header h3{margin:0;color:var(--accent);font-size:16px}.modal-close{background:var(--danger);border:none;color:var(--text-primary);width:28px;height:28px;border-radius:var(--radius-md);cursor:pointer;font-size:18px}.modal-close:hover{background:var(--danger-hover)}.modal-close:focus-visible{outline:2px solid var(--accent-light);outline-offset:2px}.modal-content{padding:20px;overflow-y:auto;font-family:Consolas,monospace;font-size:12px;line-height:1.6;white-space:pre-wrap;color:var(--text-muted);scrollbar-width:thin;scrollbar-color:var(--scrollbar-thumb) var(--scrollbar-track)}.modal-content::-webkit-scrollbar{width:8px}.modal-content::-webkit-scrollbar-track{background:var(--scrollbar-track)}.modal-content::-webkit-scrollbar-thumb{background:var(--scrollbar-thumb);border-radius:var(--radius-md)}.import-file-item{display:flex;align-items:center;gap:12px;padding:12px;border-bottom:1px solid var(--border);background:var(--bg-primary);transition:background var(--transition-fast)}.import-file-item:hover{background:var(--bg-item-hover)}.import-file-item:last-child{border-bottom:none}.import-file-checkbox{width:20px;height:20px;cursor:pointer;accent-color:var(--accent)}.import-file-thumbnail{width:80px;height:60px;border:1px solid var(--border);border-radius:var(--radius-md);background:var(--bg-secondary);flex-shrink:0;overflow:hidden}.import-file-thumbnail svg{width:100%;height:100%}.import-file-info{flex:1;min-width:0}.import-file-name{color:var(--text-primary);font-size:13px;font-weight:700;margin-bottom:4px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.import-file-details{color:var(--text-dim);font-size:11px;margin-bottom:6px}.import-file-inputs{display:flex;gap:10px;align-items:center;flex-wrap:wrap}.import-file-inputs label{color:var(--text-muted);font-size:11px}.import-file-inputs input[type=text]{width:150px;padding:6px 8px;background:var(--bg-tertiary);color:var(--text-primary);border:1px solid var(--border-input);border-radius:var(--radius-md);font-size:12px}.import-file-inputs input[type=number]{width:60px;padding:6px 8px;background:var(--bg-tertiary);color:var(--text-primary);border:1px solid var(--border-input);border-radius:var(--radius-md);font-size:12px;text-align:center}.import-file-error{color:#ff6b6b;font-size:11px;margin-top:4px}.action-btn:focus-visible,.align-btn:focus-visible,.import-file-checkbox:focus-visible,.modal-close:focus-visible,.object-item:focus-visible,.toggle-btn:focus-visible,.tool-btn:focus-visible,.undo-btn:focus-visible{outline:2px solid var(--accent-light);outline-offset:2px}#sheetNavigator{position:absolute;top:8px;right:8px;left:auto;width:auto;max-width:min(500px,calc(100% - 16px));background:#252526;border:1px solid #3c3c3c;border-radius:6px;padding:6px 10px;display:none;flex-direction:column;gap:6px;z-index:100;box-shadow:0 4px 12px rgba(0,0,0,.35);max-height:60vh;overflow:hidden}#sheetTabsContainer{display:flex;flex-wrap:wrap;justify-content:flex-end;gap:4px;max-height:64px;overflow-y:auto;overflow-x:hidden;scrollbar-width:thin;scrollbar-color:#555 #1e1e1e;padding-right:2px}#sheetTabsContainer::-webkit-scrollbar{width:6px}#sheetTabsContainer::-webkit-scrollbar-track{background:#1a1a2a;border-radius:3px}#sheetTabsContainer::-webkit-scrollbar-thumb{background:#4a4a5a;border-radius:3px}#sheetTabsContainer::-webkit-scrollbar-thumb:hover{background:#5a5a6a}#sheetNavActions{display:flex;gap:6px;align-items:center;justify-content:flex-end;flex-wrap:wrap}#sheetNavActions button{background:#3c3c3c;color:#fff;border:none;padding:5px 10px;border-radius:4px;cursor:pointer;font-size:12px;font-weight:600;transition:background .15s;white-space:nowrap}#sheetNavActions button:hover{background:#4c4c4c}#sheetNavActions #exportSheetDXF{background:#4a7a4a}#sheetNavActions #exportSheetDXF:hover{background:#5a8a5a}#sheetNavActions #resizeSheet{background:#4792c8}#sheetNavActions #resizeSheet:hover{background:#57a2d8}#sheetNavActions #deleteSheet{background:#ff5252}#sheetNavActions #deleteSheet:hover{background:#ff7070}#sheetNavActions #deleteSheet:disabled{background:#555;opacity:.4;cursor:not-allowed}#sheetNavActions #sheetInfo{color:#888;font-size:12px;min-width:100px;text-align:center}.sheet-nav-sep{width:1px;height:20px;background:#3c3c3c;margin:0 2px}.sheet-tab{display:inline-flex;align-items:center;gap:6px;padding:4px 10px;background:#2a2a3a;color:#aaa;border:1px solid #3c3c3c;border-radius:4px;cursor:pointer;font-size:12px;font-weight:600;white-space:nowrap;user-select:none;transition:.15s;flex-shrink:0}.sheet-tab:hover{background:#35354a;color:#fff}.sheet-tab.active{background:#007acc;color:#fff;border-color:#007acc;box-shadow:0 0 6px rgba(0,122,204,.3)}.sheet-tab .badge{background:rgba(255,255,255,.2);border-radius:8px;padding:1px 6px;font-size:10px;line-height:1.3}.sheet-tab.active .badge{background:rgba(255,255,255,.35)}.nesting-progress-indeterminate{background-image:linear-gradient(90deg,rgba(0,170,255,.15) 0,rgba(0,170,255,.6) 50%,rgba(0,170,255,.15) 100%)!important;background-size:50% 100%!important;background-repeat:no-repeat!important;animation:1.2s ease-in-out infinite nestingIndeterminate}@keyframes nestingIndeterminate{0%{background-position:-50% 0}100%{background-position:150% 0}}@keyframes bannerSlideIn{from{opacity:0;transform:translateX(-50%) translateY(-20px)}to{opacity:1;transform:translateX(-50%) translateY(0)}}@media (max-width:320px){.part-row-meta{display:none}.part-details-label{min-width:60px;font-size:9px}.part-row-main{gap:3px;padding:4px}}@media (max-width:260px){.part-row-main .part-btn.part-toggle{display:none}.part-row-main .part-btn.part-show{width:18px;height:18px;font-size:9px}.part-row-main .part-btn.part-delete{width:18px;height:18px;font-size:11px}.part-qty{width:32px;font-size:9px}.part-row-thumb svg{width:20px;height:20px}}@media (max-width:1024px){:root{--toolbar-width:240px;--properties-width:200px}.toolbar{padding:10px}.properties-panel{padding:12px}}@media (max-width:768px){body{flex-direction:column;height:auto;min-height:100vh}.toolbar{width:100%;border-right:none;border-bottom:1px solid var(--border);padding:10px;max-height:none;min-height:auto}.properties-panel{width:100%;border-left:none;border-top:1px solid var(--border);padding:12px;order:3;max-height:40vh;overflow-y:auto}.main-area{flex:1;min-height:50vh}.tools-grid{grid-template-columns:repeat(4,1fr);gap:6px}.tool-btn{padding:8px 4px;font-size:11px}.tool-btn .icon{width:28px;height:28px}.action-btn,.align-btn,.toggle-btn{padding:12px 15px;font-size:13px;margin-top:8px}.status-bar{height:40px;padding:0 10px;flex-wrap:wrap;gap:8px}.status-left,.status-right{gap:8px}.status-item{font-size:11px;gap:4px}.status-item span{font-size:10px}.status-item:nth-child(6),.status-item:nth-child(7){display:none}.properties-panel h3{font-size:13px;margin-bottom:8px}.prop-group label{font-size:11px}.prop-group input{padding:10px;font-size:14px}.object-item{padding:10px;font-size:12px}.object-item .delete-obj{width:24px;height:24px;font-size:16px}.modal-window{max-width:95%;max-height:90vh;margin:10px}.modal-header{padding:12px 15px}.modal-header h3{font-size:15px}.modal-content{padding:15px;font-size:13px}.modal-close{width:32px;height:32px;font-size:20px}.import-file-item{padding:10px;gap:8px}.import-file-thumbnail{width:60px;height:45px}.import-file-name{font-size:12px}.import-file-inputs{flex-direction:column;align-items:stretch}.import-file-inputs input[type=number],.import-file-inputs input[type=text]{width:100%}#partsList,.objects-list,.properties-panel,.toolbar{-webkit-overflow-scrolling:touch}.action-btn,.align-btn,.toggle-btn,.tool-btn{min-height:44px;touch-action:manipulation}input[type=number],input[type=text],select{font-size:16px;padding:12px;min-height:44px}input[type=checkbox],input[type=radio]{width:24px;height:24px;touch-action:manipulation}#addPartToSheetMenu,#contextMenu,#markupRectFillMenu,#nestedInfoMenu{min-width:calc(100% - 40px);max-width:calc(100% - 40px);left:50%;transform:translateX(-50%);padding:20px}#sheetNavigator{top:6px;right:6px;left:auto;padding:5px 8px;max-width:calc(100% - 12px);max-height:55vh}#sheetNavActions{gap:5px}#sheetNavActions button{padding:4px 8px;font-size:11px}#sheetNavActions #sheetInfo{min-width:70px;font-size:11px}.sheet-tab{padding:3px 8px;font-size:11px}}@media (max-width:480px){.toolbar{padding:8px}.tools-grid{grid-template-columns:repeat(3,1fr);gap:4px}.tool-btn{min-height:55px;font-size:10px}.tool-btn .icon{width:24px;height:24px}.status-item span{font-size:9px}.status-item:nth-child(5),.status-item:nth-child(6),.status-item:nth-child(7),.status-item:nth-child(8){display:none}.action-btn,.align-btn,.toggle-btn{padding:14px 15px}.prop-group input{padding:12px;font-size:15px}.modal-window{margin:5px;max-width:98%}.modal-header{padding:10px 12px}.modal-content{padding:12px}.modal-footer,.modal-footer button{padding:8px 12px}.status-bar{flex-wrap:wrap;height:auto;min-height:30px;padding:4px 8px}.status-left,.status-right{flex:1;flex-wrap:wrap}.status-item{font-size:10px;margin:2px 0}#sheetNavigator{top:6px;right:6px;padding:4px 6px}#sheetNavActions button,.sheet-tab{padding:3px 6px;font-size:10px}.sheet-tab .badge{padding:0 4px;font-size:9px}}@media (max-width:360px){.tools-grid{grid-template-columns:repeat(2,1fr)}.tool-btn{min-height:50px;font-size:9px}.tool-btn span:not(.icon){display:none}.tool-btn .icon{width:32px;height:32px}#stopwatch{display:none}}@media (max-width:500px) and (orientation:landscape){.modal-window{max-height:90vh;margin:10px}.toolbar{max-height:50vh}}@media (pointer:coarse){.action-btn,.align-btn,.object-item,.toggle-btn,.tool-btn,button,select{-webkit-touch-callout:none;-webkit-user-select:none;user-select:none}input[type=number],input[type=text],textarea{-webkit-touch-callout:default;-webkit-user-select:text;user-select:text}}#contextMenuClose{position:absolute;top:5px;right:5px;width:22px;height:22px;padding:0;display:flex;align-items:center;justify-content:center;background:0 0;color:#f55;border:1px solid rgba(255,85,85,.55);border-radius:4px;font-size:13px;font-weight:700;line-height:1;cursor:pointer;transition:background .15s,color .15s,border-color .15s}#contextMenuClose:hover{background:#f55;border-color:#f55;color:#fff}#contextMenuClose:active{opacity:.75}@media (hover:none) and (pointer:coarse){.action-btn:active,.align-btn:active,.toggle-btn:active,.tool-btn:active{opacity:.7;transform:scale(.98)}#contextMenuClose{top:8px;right:8px;width:32px;height:32px;font-size:16px}}