:root{--bg:#eef2f7;--panel:#ffffff;--text:#0f172a;--muted:#64748b;--line:#e5e7eb;--accent:#0066cc;--accent-2:#60a5fa;--shadow:0 14px 38px rgba(15, 23, 42, 0.14)}*{box-sizing:border-box}body{margin:0;font-family:Inter,Segoe UI,Roboto,Arial,sans-serif;color:var(--text);background:var(--bg);overflow:hidden}.app-shell{display:grid;grid-template-rows:58px 1fr;height:100vh}.top-header{background:#050505;color:#fff;display:flex;align-items:center;justify-content:space-between;padding:0 16px;box-shadow:0 2px 10px rgba(15,23,42,.22);z-index:10}.top-brand{display:flex;align-items:center;gap:12px;font-size:18px;letter-spacing:.3px;color:inherit;text-decoration:none;border-radius:8px}.top-brand:hover{opacity:.88}.top-brand:focus-visible{outline:2px solid #60a5fa;outline-offset:4px}.top-brand img{height:38px;width:auto;display:block}.top-actions{display:flex;align-items:center;gap:12px}.header-status{max-width:560px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-size:12px;color:#e0f2fe}.upload-button{display:inline-flex;align-items:center;justify-content:center;background:var(--accent);color:#fff;padding:9px 13px;border-radius:8px;cursor:pointer;font-weight:700;transition:.2s ease;border:1px solid #0052a3}.upload-button:hover{background:#0052a3}.upload-button input{display:none}.app{display:grid;grid-template-columns:var(--sidebar-width,330px) 10px minmax(0,1fr) 10px var(--properties-width,360px);min-height:0}.app.sidebar-collapsed{grid-template-columns:52px 0 minmax(0,1fr) 10px var(--properties-width,360px)}.sidebar{background:#0f172a;color:#fff;padding:10px;overflow:hidden;display:grid;grid-template-rows:38px minmax(160px,1fr) minmax(220px,1.3fr);gap:10px;min-height:0}.sidebar-toggle-row{display:flex;align-items:center;gap:10px;min-width:0}.sidebar-toggle-row span{font-weight:700;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.collapse-button{width:34px;height:34px;min-width:34px;border:0;border-radius:8px;background:var(--accent);color:#fff;cursor:pointer;font-weight:900;font-size:18px;line-height:1}.collapse-button:hover{background:#0052a3}.app.sidebar-collapsed .sidebar{padding:10px 8px;grid-template-rows:38px 0 0}.app.sidebar-collapsed .sidebar-toggle-row span,.app.sidebar-collapsed .tree-panel{display:none}.column-splitter{touch-action:none;background:#94a3b8;cursor:col-resize;min-width:10px;z-index:5;transition:background .15s ease}.column-splitter.dragging,.column-splitter:hover{background:var(--accent)}.app.sidebar-collapsed #columnSplitter{display:none}.panel{background:var(--panel);color:var(--text);border-radius:12px;padding:12px;box-shadow:var(--shadow);min-height:0}.sidebar .panel{background:rgba(255,255,255,.08);color:#fff;box-shadow:none;border:1px solid rgba(255,255,255,.1)}.panel h2{margin:0 0 9px;font-size:14px}.panel-header{display:flex;justify-content:space-between;align-items:center;gap:8px}.panel-header.stacked{display:grid;grid-template-columns:1fr;align-items:stretch}.tree-search{width:100%;height:28px;border:1px solid rgba(255,255,255,.18);border-radius:8px;padding:0 9px;background:rgba(255,255,255,.1);color:#fff;outline:0}.tree-search-row{display:grid;grid-template-columns:20px minmax(0,1fr);align-items:center;gap:5px;width:100%}.tree-search::placeholder{color:#cbd5e1}.tree-actions{display:grid;grid-template-columns:1fr 1fr;gap:6px}.small-button,.viewer-actions button{border:0;border-radius:8px;padding:7px 9px;background:var(--accent);color:#fff;cursor:pointer;font-weight:700;font-size:12px}.small-button:hover,.viewer-actions button:hover{background:#0052a3}.tree-panel{display:grid;grid-template-rows:auto 1fr;overflow:hidden}.tree-list{overflow:auto;min-height:0;display:flex;flex-direction:column;gap:4px;padding-right:3px}.tree-list.empty{color:#cbd5e1;font-size:12px;padding:8px 0}.tree-group{border-radius:8px;overflow:hidden}.tree-child,.tree-parent{display:grid;grid-template-columns:auto 1fr auto;gap:7px;align-items:center;font-size:12px;padding:5px 6px;border-radius:7px}.tree-parent{background:rgba(255,255,255,.1);font-weight:700}.tree-child{margin-left:18px;color:#e5e7eb}.tree-child:hover,.tree-parent:hover{background:rgba(255,255,255,.16)}.tree-name{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.tree-count{color:#cbd5e1;font-size:11px}.viewer-column{min-width:0;min-height:0;padding:12px}.viewer-card{position:relative;width:100%;height:100%;min-width:0;min-height:0;background:#fff;border-radius:14px;overflow:hidden;box-shadow:var(--shadow)}#viewerCanvas{width:100%;height:100%;display:block;contain:strict}.floating-actions{position:absolute;top:12px;right:12px;display:flex;gap:8px;z-index:3}.viewer-actions button{width:34px;height:34px;padding:0;font-size:17px;display:grid;place-items:center;box-shadow:0 4px 12px rgba(15,23,42,.18)}.viewer-overlay{position:absolute;inset:0;display:grid;place-content:center;text-align:center;color:#0f172a;gap:8px;pointer-events:none;background:radial-gradient(circle at center,rgba(37,99,235,.1),rgba(255,255,255,.85))}.viewer-overlay.hidden{display:none}.viewer-overlay strong{font-size:28px}.viewer-overlay span{color:#64748b}.properties-column{min-width:0;min-height:0;padding:12px 12px 12px 0}.properties-panel{height:100%;display:grid;grid-template-rows:auto 1fr;overflow:hidden}.properties-content{overflow:auto;min-height:0}.property-group{margin-bottom:14px}.property-group h3{color:var(--accent);font-size:13px;margin:0 0 8px}.property-table{width:100%;border-collapse:collapse;font-size:12px}.property-table td{border-bottom:1px solid var(--line);padding:6px 4px;vertical-align:top}.property-table td:first-child{color:var(--muted);width:45%}.empty{color:var(--muted);font-size:13px;padding:12px}@media (max-width:1100px){.app,.app.sidebar-collapsed{grid-template-columns:52px 0 1fr 0 0}.properties-column,.properties-splitter{display:none}}.app.resizing #viewerCanvas,.app.resizing .viewer-card{pointer-events:none}.properties-column .panel{background:#0f172a;color:#f8fafc;border:1px solid rgba(255,255,255,.1);box-shadow:none}.properties-column .panel h2{color:#fff}.properties-column .properties-content.empty{color:#cbd5e1}.properties-column .property-group h3{color:#60a5fa}.properties-column .property-table td{border-bottom:1px solid rgba(255,255,255,.1);color:#e5e7eb}.properties-column .property-table td:first-child{color:#94a3b8}.properties-column .property-table tr:hover td{background:rgba(255,255,255,.04)}.app{background:#0f172a}.viewer-column{padding:0;background:#fff}.viewer-card{border-radius:0;box-shadow:none}.properties-column{padding:0;background:#0f172a}.properties-panel{border-radius:0;border:0!important;box-shadow:none!important}.sidebar{padding:8px}.sidebar .panel{border-radius:9px}.column-splitter{background:#1e293b}.column-splitter.dragging,.column-splitter:hover{background:var(--accent)}*{scrollbar-width:thin;scrollbar-color:#64748b #111827}::-webkit-scrollbar{width:10px;height:10px}::-webkit-scrollbar-track{background:#111827}::-webkit-scrollbar-thumb{background:#475569;border-radius:10px;border:2px solid #111827}::-webkit-scrollbar-thumb:hover{background:#64748b}::-webkit-scrollbar-corner{background:#111827}#viewerCanvas,.viewer-card,.viewer-column{scrollbar-color:#cbd5e1 #ffffff}.properties-header{display:grid;grid-template-columns:1fr;gap:8px;padding:12px 12px 8px;border-bottom:1px solid rgba(255,255,255,.1);background:#0f172a}.properties-header h2{margin:0}.properties-search{width:100%;height:30px;border:1px solid rgba(255,255,255,.16);border-radius:7px;padding:0 10px;background:#1e293b;color:#f8fafc;outline:0}.properties-search::placeholder{color:#94a3b8}.properties-search:focus{border-color:#60a5fa}.properties-content{padding:0}.properties-content.empty{padding:12px}.property-group{margin:0;border-bottom:1px solid rgba(255,255,255,.1)}.property-summary{min-height:28px;padding:6px 10px;display:grid;grid-template-columns:1fr auto;align-items:center;gap:8px;cursor:pointer;color:#fff;background:#1e293b;font-weight:700;font-size:12px;list-style:none;user-select:none}.property-summary::-webkit-details-marker{display:none}.property-summary::before{content:'▸';margin-right:6px;color:#cbd5e1}.property-group[open]>.property-summary::before{content:'▾'}.property-summary span{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.property-summary small{color:#cbd5e1;font-weight:600}.property-summary:hover{background:#273449}.properties-column .property-table{background:#0f172a}.properties-column .property-table td{padding:5px 8px;border-bottom:1px solid rgba(255,255,255,.08)}.properties-column .property-table tr:last-child td{border-bottom:0}.properties-column .property-table td:first-child{width:42%;background:rgba(255,255,255,.03)}.sidebar{grid-template-rows:38px var(--project-panel-height,minmax(140px,1fr)) 8px minmax(0,1.3fr)}.sidebar-toggle-row{padding-left:4px}.sidebar-toggle-row span{font-size:15px}.row-splitter{height:8px;cursor:row-resize;background:#1e293b;border-radius:6px;touch-action:none}.row-splitter.dragging,.row-splitter:hover{background:var(--accent)}.property-summary{display:flex!important;grid-template-columns:none!important;align-items:center;justify-content:flex-start;gap:5px;min-height:32px;padding:7px 10px;font-size:13.5px;text-transform:uppercase;letter-spacing:.2px}.property-summary::before{margin-right:2px;flex:0 0 auto}.property-summary span{flex:1 1 auto;min-width:0}.property-summary small{margin-left:auto;flex:0 0 auto;font-size:11px}.selection-rectangle{position:absolute;border:1px solid red;background:rgba(255,0,0,.12);pointer-events:none;z-index:5}.selection-rectangle.hidden{display:none}.view-cube{position:absolute;top:54px;right:12px;width:86px;display:grid;gap:4px;z-index:4;user-select:none}.view-cube button{height:24px;border:1px solid rgba(15,23,42,.35);border-radius:5px;background:rgba(255,255,255,.92);color:#0f172a;font-size:9px;font-weight:800;cursor:pointer;box-shadow:0 4px 10px rgba(15,23,42,.16)}.view-cube button:hover{background:#e0f2fe;border-color:#06c;color:#06c}.selection-rectangle{border:1px solid #06c!important;background:rgba(0,102,204,.12)!important;box-shadow:inset 0 0 0 1px rgba(255,255,255,.28)}.selection-rectangle.crossing{background:rgba(0,102,204,.18)!important;border-style:dashed!important}.selection-rectangle.zoom-area{border:2px solid #22c55e!important;background:rgba(34,197,94,.14)!important;border-style:solid!important;box-shadow:inset 0 0 0 1px rgba(255,255,255,.45),0 0 0 1px rgba(22,163,74,.45)!important}.view-cube{position:absolute;top:12px;right:12px;width:82px;height:82px;display:block;z-index:6;perspective:220px}.view-cube .cube-face{position:absolute;border:1px solid #8b949e;background:linear-gradient(135deg,#f8fafc,#cbd5e1);color:#475569;font-size:8px;font-weight:800;cursor:pointer;box-shadow:0 2px 8px rgba(15,23,42,.18);padding:0}.view-cube .cube-face:hover{background:linear-gradient(135deg,#dbeafe,#93c5fd);color:#003f7f;border-color:#06c}.view-cube .cube-front{left:19px;top:31px;width:46px;height:34px;transform:skewY(2deg)}.view-cube .cube-top{left:18px;top:9px;width:47px;height:25px;transform:skewX(-28deg);font-size:7px}.view-cube .cube-right{left:63px;top:23px;width:20px;height:41px;transform:skewY(-38deg);writing-mode:vertical-rl;font-size:7px}.view-cube .cube-left{left:1px;top:26px;width:20px;height:39px;transform:skewY(38deg);writing-mode:vertical-rl;font-size:7px}.view-cube .cube-back,.view-cube .cube-bottom{opacity:0;pointer-events:auto}.view-cube .cube-back{left:20px;top:31px;width:44px;height:32px}.view-cube .cube-bottom{left:19px;top:57px;width:46px;height:20px}.floating-actions{top:102px;right:20px;flex-direction:column;gap:6px}.viewer-actions button{width:30px;height:30px;font-size:15px}.sidebar{grid-template-rows:38px var(--project-panel-height,minmax(120px,1fr)) 8px minmax(140px,1.2fr)!important}.sidebar-toggle-row{padding-left:8px}.sidebar-toggle-row span{display:block!important}.row-splitter{display:block;height:8px;min-height:8px;cursor:row-resize;background:#1e293b;border-radius:6px;touch-action:none}.row-splitter.dragging,.row-splitter:hover{background:#06c}.view-cube{top:10px!important;right:12px!important;width:92px!important;height:92px!important;opacity:1!important;pointer-events:auto;background:0 0}.view-cube::after{content:'';position:absolute;inset:9px 8px 8px 8px;border:1px solid rgba(71,85,105,.65);box-shadow:0 6px 16px rgba(15,23,42,.18);pointer-events:none;transform:rotate(-8deg) skewY(-2deg);background:rgba(255,255,255,.35)}.view-cube .cube-face{opacity:1!important;pointer-events:auto!important;z-index:7;border:1px solid #64748b!important;background:linear-gradient(135deg,#fff,#d1d5db)!important;color:#475569!important;text-shadow:none}.view-cube .cube-front{left:20px!important;top:36px!important;width:48px!important;height:36px!important;transform:none!important}.view-cube .cube-top{left:18px!important;top:13px!important;width:50px!important;height:24px!important;transform:skewX(-28deg)!important}.view-cube .cube-right{left:67px!important;top:27px!important;width:22px!important;height:42px!important;transform:skewY(-38deg)!important}.view-cube .cube-back,.view-cube .cube-bottom,.view-cube .cube-left{display:none!important}.floating-actions{top:108px!important;right:42px!important;display:flex!important;flex-direction:column!important}#hideSelectedButton{display:grid!important;place-items:center}.view-cube{position:absolute!important;top:12px!important;right:12px!important;width:104px!important;height:104px!important;z-index:8!important;perspective:520px!important;background:0 0!important;pointer-events:auto!important;user-select:none}.view-cube::after{display:none!important}.view-cube-scene{position:absolute;inset:0;display:grid;place-items:center;perspective:520px}.view-cube-object{width:58px;height:58px;position:relative;transform-style:preserve-3d;transform:rotateX(-24deg) rotateY(-38deg);transition:transform .12s ease-out;cursor:grab}.view-cube.dragging .view-cube-object{cursor:grabbing;transition:none}.view-cube .cube-face{display:grid!important;place-items:center;position:absolute!important;left:0!important;top:0!important;width:58px!important;height:58px!important;padding:0!important;opacity:.96!important;pointer-events:auto!important;border:1px solid #8b949e!important;border-radius:0!important;background:linear-gradient(135deg,#fff,#d1d5db)!important;color:#475569!important;font-size:8px!important;font-weight:800!important;line-height:1.05!important;text-align:center!important;box-shadow:inset 0 0 0 1px rgba(255,255,255,.45)!important;writing-mode:horizontal-tb!important;transform-origin:center center!important;backface-visibility:visible!important}.view-cube .cube-face:hover{background:linear-gradient(135deg,#dbeafe,#93c5fd)!important;color:#003f7f!important;border-color:#06c!important}.view-cube .cube-front{transform:translateZ(29px)!important}.view-cube .cube-back{transform:rotateY(180deg) translateZ(29px)!important}.view-cube .cube-right{transform:rotateY(90deg) translateZ(29px)!important}.view-cube .cube-left{transform:rotateY(-90deg) translateZ(29px)!important}.view-cube .cube-top{transform:rotateX(90deg) translateZ(29px)!important}.view-cube .cube-bottom{transform:rotateX(-90deg) translateZ(29px)!important}.floating-actions{top:122px!important;right:48px!important}.view-cube{width:104px!important;height:104px!important;top:12px!important;right:12px!important;background:0 0!important;border:0!important;perspective:none!important;cursor:grab}.view-cube.dragging{cursor:grabbing}#viewCubeCanvas{width:104px;height:104px;display:block;background:0 0}.view-cube{width:128px!important;height:128px!important;top:10px!important;right:12px!important}#viewCubeCanvas{width:128px!important;height:128px!important}.floating-actions{top:146px!important;right:58px!important}.floating-actions{right:10px!important;gap:7px!important}.viewer-actions button{width:38px!important;height:38px!important;font-size:19px!important;border-radius:9px!important}.viewer-actions button.active{background:#003f7f!important;box-shadow:0 0 0 2px rgba(96,165,250,.9),0 4px 12px rgba(15,23,42,.18)!important}.viewer-actions .tool-icon{width:23px;height:23px;fill:none;stroke:currentColor;stroke-width:1.9;stroke-linecap:round;stroke-linejoin:round;display:block}.category-panel .tree-list{overflow:auto;min-height:0;white-space:nowrap;padding-right:4px;padding-bottom:6px}.category-tree-group{min-width:max-content}.category-panel .tree-child,.category-parent{grid-template-columns:18px auto max-content max-content;min-width:max-content;width:max-content;max-width:none}.category-panel .tree-child .tree-name,.category-parent .tree-name{overflow:visible;text-overflow:clip;white-space:nowrap;min-width:max-content}.tree-expander{width:16px;height:16px;border:0;padding:0;margin:0;background:0 0;color:#cbd5e1;display:inline-grid;place-items:center;cursor:pointer;font-size:12px;line-height:1}.tree-expander:disabled{cursor:default;opacity:0}.tree-expander-placeholder{pointer-events:none}.tree-children{display:flex;flex-direction:column;gap:2px;margin-left:14px;min-width:max-content}.category-panel .tree-child{margin-left:0}.tree-list::-webkit-scrollbar{width:10px;height:10px}.tree-list::-webkit-scrollbar-track{background:rgba(15,23,42,.35);border-radius:999px}.tree-list::-webkit-scrollbar-thumb{background:#475569;border-radius:999px;border:2px solid rgba(15,23,42,.35)}.tree-list::-webkit-scrollbar-thumb:hover{background:#64748b}.tree-list{align-items:flex-start}.tree-child,.tree-children,.tree-group,.tree-list>*,.tree-parent{flex:0 0 auto;flex-shrink:0}.tree-child,.tree-parent{min-height:26px;line-height:16px}.category-panel .tree-list{overflow-x:auto!important;overflow-y:auto!important}.category-panel .tree-child,.category-parent,.category-tree-group,.tree-children{flex-shrink:0!important}.loading-panel{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;background:rgba(15,23,42,.3);backdrop-filter:blur(2px);z-index:8;pointer-events:none}.loading-panel.hidden{display:none}.loading-card{width:min(440px,calc(100% - 42px));border-radius:16px;padding:18px 20px;background:rgba(15,23,42,.92);color:#fff;box-shadow:0 18px 50px rgba(15,23,42,.3);border:1px solid rgba(255,255,255,.14);display:grid;gap:10px}.loading-card strong{font-size:15px;letter-spacing:.2px}.loading-card small,.loading-card span{color:#dbeafe;font-size:12px}.loading-bar{width:100%;height:9px;overflow:hidden;border-radius:999px;background:rgba(255,255,255,.16)}.loading-bar-fill{height:100%;width:0%;border-radius:inherit;background:var(--accent);transition:width .18s ease}.loading-bar-fill.indeterminate{width:42%!important;animation:loading-indeterminate 1s ease-in-out infinite alternate}@keyframes loading-indeterminate{from{transform:translateX(-80%)}to{transform:translateX(160%)}}.project-panel .tree-child,.project-panel .tree-count,.project-panel .tree-name,.project-panel .tree-parent{cursor:pointer;user-select:none}.project-panel input[type=checkbox]{cursor:pointer}.project-panel .tree-child:hover,.project-panel .tree-parent:hover{background:rgba(0,102,204,.34);outline:1px solid rgba(96,165,250,.45)}.measure-overlay-root{position:absolute;inset:0;pointer-events:none;z-index:20}.measure-point-label{position:absolute;min-width:18px;height:18px;padding:0 5px;border-radius:999px;background:rgba(217,70,239,.9);color:#fff7ed;font-size:11px;font-weight:700;line-height:18px;text-align:center;transform:translate(-50%,-50%);box-shadow:0 2px 6px rgba(15,23,42,.35)}.measure-distance-label{position:absolute;padding:3px 8px;border-radius:999px;background:rgba(255,255,255,.96);color:#0f172a;border:1px solid rgba(15,23,42,.22);font-weight:700;font-size:12px;line-height:1.2;transform:translate(-50%,-150%);box-shadow:0 2px 8px rgba(15,23,42,.18);white-space:nowrap}.measure-axis-box{position:absolute;left:50%;bottom:18px;transform:translateX(-50%);display:flex;gap:14px;align-items:center;padding:8px 12px;border-radius:6px;background:rgba(31,41,55,.9);border:1px solid rgba(255,255,255,.12);box-shadow:0 10px 24px rgba(15,23,42,.28);font-size:12px;font-weight:700;color:#e5e7eb;white-space:nowrap}.measure-axis-box.hidden,.measure-distance-label.hidden,.measure-point-label.hidden{display:none}.measure-axis-x{color:#ef4444}.measure-axis-y{color:#22c55e}.measure-axis-z{color:#60a5fa}.measure-axis-box strong{color:inherit;margin-right:3px}.viewer-actions button.measure-mini-button{width:28px!important;height:28px!important;min-width:28px!important;min-height:28px!important;margin-left:5px;font-size:18px!important;font-weight:800!important;line-height:1!important;border-radius:7px!important;background:rgba(15,23,42,.88)!important;color:#e5e7eb!important}.viewer-actions button.measure-mini-button:hover{background:#0f5ea8!important}.viewer-actions button.measure-mini-button.hidden{display:none!important}.measure-dynamic-label{position:absolute;transform:translate(-50%,-50%);padding:3px 7px;border-radius:999px;font-size:12px;font-weight:800;line-height:1.2;white-space:nowrap;pointer-events:none;box-shadow:0 2px 8px rgba(15,23,42,.2)}.measure-total-dynamic{background:rgba(255,255,255,.96);color:#0f172a;border:1px solid rgba(15,23,42,.22);transform:translate(-50%,-160%)}.measure-projection-label{background:rgba(15,23,42,.88);border:1px solid rgba(255,255,255,.24)}.measure-projection-x{color:#ff4d4d}.measure-projection-y{color:#31d158}.measure-projection-z{color:#38bdf8}.top-brand strong{display:inline-flex;align-items:center;padding:.55rem .9rem;border-radius:10px;font-weight:700;font-size:1.02rem;letter-spacing:0;line-height:1;transition:background-color .2s,color .2s}.top-brand:focus-visible strong,.top-brand:hover strong{background:rgba(0,102,204,.18);color:#fff}.header-upload{padding:.55rem .9rem;border-radius:10px;font-weight:700;font-size:1.02rem;line-height:1}.top-brand{gap:0}.top-brand img{height:40px!important;width:auto!important;display:block}.properties-column .property-table td.property-value-cell.editable{cursor:text;position:relative}.properties-column .property-table td.property-value-cell.editable:hover{background:rgba(96,165,250,.12);box-shadow:inset 0 0 0 1px rgba(96,165,250,.35)}.properties-column .property-table tr.property-row-editable td:first-child::after{content:' 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