:root{--sidebar-width:25vw;--topbar-height:48px;--floating-panel-toggle-size:38px;--floating-panel-toggle-icon:20px;--floating-panel-toggle-radius:8px;--page-bg:#f4f7fb;--text-color:#1f2937;--panel-bg:#fff;--panel-border:#dbe3ef;--tree-bg:#f8fbff;--tree-border:#dbe3ef;--tree-text:#1f2937;--tree-button-bg:#fff;--tree-button-text:#1f2937;--tree-button-border:#cfd8e6;--code-bg:#f8fafc;--code-text:#0f172a;--bim-ui_main-base:#2563eb;--bim-ui_main-contrast:#fff;--bim-ui_accent-base:#3b82f6;--bim-ui_accent-contrast:#fff;--bim-ui_bg-base:#fff;--bim-ui_bg-contrast-20:#f2f6fb;--bim-ui_bg-contrast-40:#dbe3ef;--bim-ui_bg-contrast-60:#c5d2e6;--bim-ui_bg-contrast-80:#5b6b84;--bim-ui_bg-contrast-100:#0f172a;--bim-panel--c:#0f172a;--bim-label--c:#0f172a}.app-startup-overlay{z-index:2147483000;color:#e8f1ff;background:#050a14;justify-content:center;align-items:center;transition:opacity .45s,visibility .45s;display:flex;position:fixed;inset:0}.app-startup-overlay--exiting{opacity:0;visibility:hidden;pointer-events:none}.app-startup-overlay__inner{flex-direction:column;align-items:center;gap:1.5rem;max-width:min(92vw,420px);padding:2rem;display:flex}.app-startup-overlay__brand{letter-spacing:.06em;text-transform:uppercase;-webkit-user-select:none;user-select:none;justify-content:center;align-items:center;gap:.08em;font-family:system-ui,Segoe UI,Roboto,sans-serif;font-size:clamp(1.85rem,6vw,2.75rem);font-weight:800;line-height:1;display:flex}.app-startup-overlay__brand-part{color:#f8fafc;text-shadow:.04em 0 #ef444473,-.04em 0 #38bdf880;display:inline-block}.app-startup-overlay__brand-mark{align-items:center;line-height:0;display:inline-flex}.app-startup-overlay__brand-mark-img{object-fit:contain;width:auto;height:1.12em;display:block}.app-startup-overlay__brand-x{color:#4a9eff;letter-spacing:0;text-shadow:0 0 18px #4a9eff8c;font-size:.72em;font-style:normal;font-weight:900}.app-startup-overlay__bar{width:min(72vw,280px)}.app-startup-overlay__bar-track{background:#4a9eff1f;border-radius:999px;height:3px;overflow:hidden}.app-startup-overlay__bar-fill{transform-origin:0;width:100%;height:100%;transform:scaleX(var(--startup-fill,.04));border-radius:inherit;background:linear-gradient(90deg,#38bdf8,#4a9eff);transition:transform .4s cubic-bezier(.22,1,.36,1)}.app-startup-overlay__status{letter-spacing:.12em;text-transform:uppercase;color:#93c5fdeb;text-align:center;margin:0;font-family:ui-monospace,Cascadia Code,Consolas,monospace;font-size:.68rem;line-height:1.45}.sr-only{clip:rect(0, 0, 0, 0);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}body[data-theme=dark]{--page-bg:#0f172a;--text-color:#e5e7eb;--panel-bg:#111827;--panel-border:#263244;--tree-bg:#1f2937;--tree-border:#334155;--tree-text:#e5e7eb;--tree-button-bg:#111827;--tree-button-text:#f3f4f6;--tree-button-border:#4b5563;--code-bg:#0b1220;--code-text:#d9f7be;--bim-ui_main-base:#3b82f6;--bim-ui_main-contrast:#fff;--bim-ui_accent-base:#60a5fa;--bim-ui_accent-contrast:#0f172a;--bim-ui_bg-base:#0f172a;--bim-ui_bg-contrast-20:#1f2937;--bim-ui_bg-contrast-40:#334155;--bim-ui_bg-contrast-60:#4b5f7a;--bim-ui_bg-contrast-80:#dbe5f5;--bim-ui_bg-contrast-100:#f8fafc;--bim-panel--c:#f8fafc;--bim-label--c:#f8fafc}html,body{background:var(--page-bg);width:100%;height:100%;color:var(--text-color);margin:0;font-family:Arial,sans-serif;overflow:hidden}#app-grid{width:100vw;height:100vh;grid-template:"header header header" var(--topbar-height) "sidebar resizer content" 1fr / var(--sidebar-width) 8px 1fr;height:100dvh;display:grid;overflow:hidden}#topbar{--topbar-pad-x:12px;background:var(--panel-bg);border-bottom:1px solid var(--panel-border);width:100%;padding:0 var(--topbar-pad-x);height:var(--topbar-height);box-sizing:border-box;justify-content:space-between;align-items:center;gap:12px;display:flex}#topbar-brand{-webkit-user-select:none;user-select:none;flex-shrink:0;align-items:center;gap:8px;display:flex}.topbar-logo-picture{flex-shrink:0;align-items:center;line-height:0;display:flex}#topbar-logo{object-fit:contain;flex-shrink:0;width:auto;max-width:140px;height:28px;display:block}#topbar-title,.topbar-title-ifc{color:var(--text-color);white-space:nowrap;letter-spacing:-.02em;font-size:1.1875rem;font-weight:700;line-height:1.2}.topbar-title-ifc{color:var(--bim-ui_accent-base);font-weight:500}#topbar-end{flex-shrink:0;align-items:center;gap:4px;display:flex}.topbar-settings-wrap{position:relative}.topbar-settings-menu{top:calc(100% + var(--topbar-pad-x,12px));z-index:21050;border:1px solid var(--panel-border);background:var(--panel-bg);border-radius:10px;min-width:220px;padding:4px 0;position:absolute;right:0;box-shadow:0 8px 28px #0000002e}.topbar-settings-menu[hidden]{display:none!important}.topbar-settings-menu__item{box-sizing:border-box;width:100%;color:var(--text-color);text-align:left;cursor:pointer;background:0 0;border:none;padding:10px 14px;font-size:.9rem;font-weight:500;transition:background-color .12s;display:block}.topbar-settings-menu__item:hover{background:#3b82f61a}.topbar-settings-menu__item:focus-visible{outline:2px solid var(--bim-ui_accent-base);outline-offset:-2px}.topbar-button{border:1px solid var(--tree-button-border);background:var(--tree-button-bg);color:var(--tree-button-text);cursor:pointer;border-radius:8px;padding:8px 12px;font-size:14px;transition:background-color .16s,border-color .16s,color .16s}.topbar-button:hover{background:#3b82f61f;border-color:#3b82f6}.topbar-button.is-active{color:#fff;background:#3b82f6;border-color:#2563eb}.topbar-icon-btn{flex-shrink:0;justify-content:center;align-items:center;width:36px;height:36px;padding:0;display:inline-flex}.topbar-icon-btn svg{pointer-events:none;width:18px;height:18px}.topbar-theme-icon{flex-shrink:0;width:18px;height:18px;display:none}body[data-theme=light] #icon-theme-light,body[data-theme=dark] #icon-theme-dark{display:block}#sidebar{background:var(--panel-bg);border-right:1px solid var(--panel-border);--sidebar-tint-muted:#64748b29;--sidebar-tint-row:#4755691c;--sidebar-rail:#64748b;--sidebar-icon-on-tint:#475569;--sidebar-focus-ring:#64748b;--sidebar-control-hover-bg:#4755691a;--sidebar-control-hover-border:#94a3b8;flex-direction:column;min-width:0;min-height:0;display:flex}body[data-theme=dark] #sidebar{--sidebar-tint-muted:#94a3b824;--sidebar-tint-row:#94a3b81c;--sidebar-rail:#94a3b8;--sidebar-icon-on-tint:#e2e8f0;--sidebar-focus-ring:#cbd5e1;--sidebar-control-hover-bg:#94a3b81f;--sidebar-control-hover-border:#64748b}.sidebar-chrome{border-bottom:1px solid var(--panel-border);background:var(--panel-bg);flex-shrink:0;justify-content:space-between;align-items:flex-start;gap:10px;padding:12px 12px 10px;display:flex;box-shadow:inset 0 1px #fff9,0 4px 14px #0f172a0a}body[data-theme=dark] .sidebar-chrome{box-shadow:inset 0 1px #ffffff0a,0 6px 20px #00000059}.sidebar-chrome-text{flex-direction:column;flex:1;gap:4px;min-width:0;padding-left:2px;display:flex}.sidebar-chrome-title{color:var(--text-color);letter-spacing:-.02em;font-size:1rem;font-weight:600;line-height:1.25}.sidebar-chrome-subtitle{color:var(--bim-ui_bg-contrast-80);max-width:36ch;font-size:.75rem;font-weight:400;line-height:1.35}.sidebar-collapse-btn{border:1px solid var(--tree-button-border);background:var(--tree-button-bg);width:34px;height:34px;color:var(--tree-button-text);cursor:pointer;border-radius:8px;flex-shrink:0;justify-content:center;align-items:center;margin-top:1px;padding:0;transition:background-color .16s,border-color .16s;display:inline-flex}.sidebar-collapse-btn:hover{background:var(--sidebar-control-hover-bg);border-color:var(--sidebar-control-hover-border)}.sidebar-collapse-btn svg{pointer-events:none;width:20px;height:20px}.sidebar-scroll{background:var(--bim-ui_bg-contrast-20);flex:1;min-height:0;padding:10px 10px 12px;overflow:hidden auto}.sidebar-scroll-stack{flex-direction:column;gap:14px;display:flex}.sidebar-panel-group{flex-direction:column;gap:8px;display:flex}.sidebar-stack-label{letter-spacing:.08em;text-transform:uppercase;color:var(--bim-ui_bg-contrast-80);margin:0;padding:0 4px;font-size:.6875rem;font-weight:600}.sidebar-panel-group:first-child .sidebar-stack-label{margin-top:0}.sidebar-expand-btn{left:8px;top:calc(var(--topbar-height) + 10px);z-index:25;width:var(--floating-panel-toggle-size);height:var(--floating-panel-toggle-size);border-radius:var(--floating-panel-toggle-radius);border:1px solid var(--panel-border);background:var(--panel-bg);color:var(--tree-button-text);cursor:pointer;justify-content:center;align-items:center;padding:0;transition:background-color .16s,border-color .16s;display:none;position:fixed;box-shadow:0 2px 10px #00000024}.sidebar-expand-btn:hover{background:#4755691a;border-color:#94a3b8}body[data-theme=dark] .sidebar-expand-btn:hover{background:#94a3b81f;border-color:#64748b}.sidebar-expand-btn svg{width:var(--floating-panel-toggle-icon);height:var(--floating-panel-toggle-icon);pointer-events:none}@media (min-width:1025px){body.sidebar-desktop-collapsed #app-grid{grid-template-columns:0 0 1fr}body.sidebar-desktop-collapsed #sidebar{pointer-events:none;border-right-width:0;overflow:hidden}body.sidebar-desktop-collapsed #sidebar-resizer{display:none}body.sidebar-desktop-collapsed .sidebar-expand-btn{display:inline-flex}}@media (max-width:1024px){body:not(.sidebar-open) .sidebar-expand-btn{display:inline-flex}}#sidebar-resizer{cursor:col-resize;border-left:1px solid var(--panel-border);border-right:1px solid var(--panel-border);background:0 0;width:8px;height:100%}#sidebar-resizer:hover{background:#3b82f62e}#viewer-wrapper{min-width:0;height:100%;min-height:0;position:relative;overflow:hidden}#viewer-container{width:100%;height:100%}.viewer-top-controls{z-index:25;pointer-events:none;flex-direction:row-reverse;align-items:flex-start;gap:10px;display:flex;position:absolute;top:4px;right:8px}.viewer-top-controls>*{pointer-events:auto}.view-cube-hud{box-shadow:none;background:0 0;border:none;border-radius:0;padding:0;display:block;position:relative}.view-cube-plan-rotate-wrap{z-index:2;pointer-events:none;flex-direction:column;justify-content:space-between;align-items:center;display:flex;position:absolute;top:6px;bottom:6px;left:6px}.view-cube-plan-rotate-wrap .view-cube-plan-rotate-btn{z-index:auto;pointer-events:auto;flex-shrink:0;position:static;top:auto;right:auto}.view-cube-plan-rotate-wrap[hidden]{display:none!important}.view-cube-plan-rotate-icon{object-fit:contain;pointer-events:none;width:18px;height:18px;display:block}body[data-theme=dark] .view-cube-plan-rotate-icon{filter:invert()}.view-cube-home{z-index:2;width:36px;height:36px;color:var(--tree-button-text);cursor:pointer;background:0 0;border:1px solid #0000;border-radius:8px;justify-content:center;align-items:center;padding:0;transition:background-color .14s,border-color .14s;display:inline-flex;position:absolute;top:6px;right:6px}.view-cube-home:hover{background:#3b82f61f;border-color:#3b82f6}.view-cube-home svg{pointer-events:none;width:18px;height:18px}.view-cube-canvas{cursor:pointer;touch-action:none;-webkit-user-select:none;user-select:none;border-radius:6px;width:204px;height:204px;display:block}.viewer-style-flyout{z-index:26;background:var(--panel-bg);border:1px solid var(--panel-border);opacity:.94;border-radius:10px;flex-direction:column;gap:3px;min-width:148px;padding:6px 8px;transition:opacity .15s;display:flex;position:absolute;top:auto;right:auto;transform:translate(-50%);box-shadow:0 2px 10px #00000024}.viewer-style-flyout:hover{opacity:1}.viewer-style-flyout[hidden]{display:none!important}.viewer-style-flyout-btn{color:var(--tree-button-text);box-sizing:border-box;cursor:pointer;white-space:nowrap;text-align:left;background:0 0;border:1px solid #0000;border-radius:6px;align-items:center;gap:6px;width:100%;min-height:28px;padding:4px 8px;font-size:11px;font-weight:600;transition:background-color .14s,border-color .14s;display:inline-flex}.viewer-style-flyout-btn svg{pointer-events:none;flex-shrink:0;width:13px;height:13px}.viewer-style-flyout-btn:hover{background:#3b82f61f;border-color:#3b82f6}.viewer-style-flyout-btn:active{background:#3b82f638}.viewer-style-flyout-btn.viewer-toolbar-btn--active{color:#2563eb;background:#3b82f624;border-color:#3b82f6}body[data-theme=dark] .viewer-style-flyout-btn.viewer-toolbar-btn--active{color:#60a5fa}#viewer-toolbar{z-index:10;background:var(--panel-bg);border:1px solid var(--panel-border);opacity:.94;border-radius:10px;flex-direction:row;align-items:center;gap:4px;padding:5px 6px 5px 8px;transition:opacity .15s,bottom .22s,padding .22s,background .2s,border-color .2s,box-shadow .2s;display:flex;position:absolute;bottom:14px;left:50%;transform:translate(-50%);box-shadow:0 2px 12px #00000029}#viewer-toolbar:hover{opacity:1}#viewer-toolbar.viewer-toolbar--collapsed{box-shadow:none;background:0 0;border-color:#0000;border-radius:0;gap:0;padding:0;bottom:0}#viewer-toolbar.viewer-toolbar--collapsed:hover{opacity:1}.viewer-toolbar-body{scrollbar-width:thin;box-sizing:border-box;flex-direction:row;align-items:center;gap:6px;max-width:min(96vw,520px);display:flex;overflow:auto hidden}.viewer-toolbar-category-btn.viewer-toolbar-category-btn--open{color:#2563eb;background:#3b82f629;border-color:#3b82f6}body[data-theme=dark] .viewer-toolbar-category-btn.viewer-toolbar-category-btn--open{color:#93c5fd}.viewer-toolbar-subpanel{z-index:11;box-sizing:border-box;scrollbar-width:thin;border:1px solid var(--panel-border);background:var(--panel-bg);opacity:.98;border-radius:10px;width:max-content;max-width:min(100vw - 24px,720px);padding:0;position:absolute;left:50%;overflow:auto hidden;transform:translate(-50%);box-shadow:0 -4px 20px #00000029}.viewer-toolbar-subpanel[hidden]{display:none!important}.viewer-toolbar-subpanel__bar{box-sizing:border-box;flex-flow:row;align-items:center;gap:4px;min-width:0;padding:6px 8px;display:flex}.viewer-toolbar-sheet{box-sizing:border-box;flex-flow:row;align-items:center;gap:4px;width:max-content;max-width:100%;display:flex}.viewer-toolbar-sheet[hidden]{display:none!important}#viewer-toolbar.viewer-toolbar--collapsed .viewer-toolbar-body,#viewer-toolbar.viewer-toolbar--collapsed .viewer-toolbar-sep-for-toggle{display:none}.viewer-toolbar-sep-for-toggle{flex-shrink:0}.viewer-toolbar-toggle{width:auto;min-width:34px;height:auto;min-height:0;color:var(--tree-button-text);cursor:pointer;box-sizing:border-box;background:0 0;border:1px solid #0000;border-radius:7px;flex-shrink:0;justify-content:center;align-items:center;margin:0;padding:6px 8px;transition:background-color .14s,color .14s,border-color .14s;display:inline-flex}.viewer-toolbar-toggle:hover{color:var(--bim-ui_accent-base);background:#3b82f61a}.viewer-toolbar-toggle-icon{pointer-events:none;width:18px;height:18px}.viewer-toolbar-toggle-icon--collapsed{display:none}#viewer-toolbar.viewer-toolbar--collapsed .viewer-toolbar-toggle{border:1px solid var(--panel-border);background:var(--panel-bg);border-bottom:none;border-radius:10px 10px 0 0;width:52px;min-width:52px;padding:8px 0 6px;box-shadow:0 -2px 10px #0000001f}#viewer-toolbar.viewer-toolbar--collapsed .viewer-toolbar-toggle-icon--expanded{display:none}#viewer-toolbar.viewer-toolbar--collapsed .viewer-toolbar-toggle-icon--collapsed{display:block}.viewer-toolbar-btn{color:var(--tree-button-text);cursor:pointer;white-space:nowrap;background:0 0;border:1px solid #0000;border-radius:7px;align-items:center;gap:6px;padding:6px 10px;font-size:13px;font-weight:500;transition:background-color .14s,border-color .14s;display:inline-flex}.viewer-toolbar-btn__label{display:inline}.viewer-toolbar-btn svg{pointer-events:none;flex-shrink:0;width:15px;height:15px}.viewer-toolbar-btn:hover{background:#3b82f61f;border-color:#3b82f6}.viewer-toolbar-btn:active{background:#3b82f638}.viewer-toolbar-btn:disabled{cursor:not-allowed;opacity:.45;pointer-events:none}.viewer-toolbar-btn:disabled:hover{background:0 0;border-color:#0000}.viewer-toolbar-btn.viewer-toolbar-btn--grid-off{opacity:.72}.viewer-toolbar-btn.viewer-toolbar-btn--active{color:#2563eb;background:#3b82f624;border-color:#3b82f6}body[data-theme=dark] .viewer-toolbar-btn.viewer-toolbar-btn--active{color:#60a5fa}.viewer-toolbar-sep{background:var(--panel-border);flex-shrink:0;width:1px;height:20px;margin:0 2px}.properties-section{flex-direction:column;gap:8px;display:flex}.properties-toolbar{justify-content:flex-end;display:flex}.properties-toggle{background:var(--tree-button-bg);color:var(--tree-button-text);border:1px solid var(--tree-button-border);cursor:pointer;border-radius:6px;padding:6px 10px;font-size:12px;transition:background-color .16s,border-color .16s,color .16s}.properties-toggle:hover:not(:disabled){background:#4755691a;border-color:#94a3b8}.properties-toggle.is-active{color:#fff;background:#475569;border-color:#334155}body[data-theme=dark] .properties-toggle:hover:not(:disabled){background:#94a3b81f;border-color:#64748b}body[data-theme=dark] .properties-toggle.is-active{color:#fff;background:#64748b;border-color:#475569}.properties-toggle:disabled{cursor:not-allowed;opacity:.45}.properties-body{max-height:70vh;border:1px solid var(--panel-border);background:var(--panel-bg);border-radius:6px;max-height:70dvh;overflow:auto}.properties-formatted{min-height:1.5rem}.properties-formatted.properties-empty{color:var(--text-color);opacity:.88;padding:10px 12px;font-size:13px;line-height:1.4}.properties-json{white-space:pre-wrap;word-break:break-word;color:var(--code-text);background:var(--code-bg);box-sizing:border-box;min-height:4rem;margin:0;padding:10px 12px;font-family:ui-monospace,Cascadia Code,Consolas,monospace;font-size:11px;line-height:1.45;display:block}.properties-json[hidden],.properties-formatted[hidden]{display:none}.properties-table{border-collapse:collapse;width:100%;font-size:12px}.properties-table th{text-align:left;vertical-align:top;border-bottom:1px solid var(--panel-border);width:38%;color:var(--text-color);background:var(--code-bg);padding:8px 10px;font-weight:600}.properties-table td{border-bottom:1px solid var(--panel-border);color:var(--text-color);padding:8px 10px}.properties-table tbody tr:last-child th,.properties-table tbody tr:last-child td{border-bottom:none}.properties-value{white-space:pre-wrap;word-break:break-word;line-height:1.45}.properties-type-hint{letter-spacing:.03em;color:var(--bim-ui_bg-contrast-80);margin-top:4px;font-family:ui-monospace,Cascadia Code,Consolas,monospace;font-size:10px}#storey-tree,#category-tree{flex-direction:column;gap:6px;margin-bottom:8px;display:flex}.tree-item{background:var(--tree-bg);color:var(--tree-text);border:1px solid var(--tree-border);border-radius:6px;justify-content:space-between;align-items:center;gap:6px;padding:6px;font-size:12px;display:flex}.tree-item button{background:var(--tree-button-bg);color:var(--tree-button-text);border:1px solid var(--tree-button-border);cursor:pointer;border-radius:4px;padding:2px 6px;font-size:11px;transition:background-color .16s,border-color .16s,color .16s}.tree-item button:hover{background:#4755691a;border-color:#94a3b8}.tree-item button.is-active{color:#fff;background:#475569;border-color:#334155}body[data-theme=dark] .tree-item button:hover{background:#94a3b81f;border-color:#64748b}body[data-theme=dark] .tree-item button.is-active{color:#fff;background:#64748b;border-color:#475569}.sidebar-panel{background:var(--panel-bg);border:1px solid var(--panel-border);border-radius:10px;overflow:hidden;box-shadow:0 1px 2px #0f172a0a,0 4px 16px #0f172a0d}body[data-theme=dark] .sidebar-panel{box-shadow:inset 0 1px #ffffff0d,0 8px 24px #00000059}.sidebar-panel-title{color:var(--text-color);border-bottom:1px solid var(--panel-border);background:linear-gradient(180deg, #f8fafc 0%, var(--panel-bg) 55%);letter-spacing:-.015em;align-items:center;gap:10px;padding:.65rem .85rem;font-size:.875rem;font-weight:600;line-height:1.3;display:flex}body[data-theme=dark] .sidebar-panel-title{background:linear-gradient(180deg, #1e2937 0%, var(--panel-bg) 55%)}.sidebar-panel-title-icon{background:var(--sidebar-tint-muted);width:34px;height:34px;color:var(--sidebar-icon-on-tint);border-radius:8px;flex-shrink:0;justify-content:center;align-items:center;display:inline-flex}.sidebar-panel-title-icon svg{width:18px;height:18px}.sidebar-panel-title-text{flex:1;min-width:0}.sidebar-section{border-bottom:1px solid var(--panel-border)}.sidebar-section:last-child{border-bottom:none}.sidebar-section-btn{background:var(--bim-ui_bg-contrast-20);cursor:pointer;text-align:left;width:100%;font:inherit;color:var(--text-color);box-sizing:border-box;border:none;border-left:3px solid #0000;justify-content:space-between;align-items:center;gap:10px;min-height:2.75rem;padding:.65rem .85rem .65rem .65rem;transition:background-color .16s,border-color .16s,box-shadow .16s;display:flex}.sidebar-section-btn:hover{background:var(--tree-bg)}.sidebar-section-btn:focus-visible{outline:2px solid var(--sidebar-focus-ring);outline-offset:-2px;z-index:1}.sidebar-section-btn[aria-expanded=true]{background:var(--sidebar-tint-row);border-left-color:var(--sidebar-rail);font-weight:600}.sidebar-section-btn-main{flex:1;align-items:center;gap:10px;min-width:0;display:flex}.sidebar-section-icon{background:var(--panel-bg);width:32px;height:32px;color:var(--bim-ui_bg-contrast-80);border:1px solid var(--panel-border);border-radius:7px;flex-shrink:0;justify-content:center;align-items:center;display:inline-flex}.sidebar-section-icon svg{width:17px;height:17px}.sidebar-section-label{flex:1;min-width:0;font-size:13px;font-weight:500;line-height:1.35}.sidebar-section-btn[aria-expanded=true] .sidebar-section-label{font-weight:600}.sidebar-section-chevron{width:1.25rem;height:1.25rem;color:var(--bim-ui_bg-contrast-80);opacity:.85;flex-shrink:0;transition:transform .25s cubic-bezier(.65,.05,.36,1)}.sidebar-section-btn[aria-expanded=false] .sidebar-section-chevron{transform:rotate(180deg)}.sidebar-section-body{background:var(--panel-bg);padding:12px}.sidebar-section-body[hidden]{display:none}@media (max-width:1024px){#app-grid{grid-template:"header" var(--topbar-height) "content" 1fr / 1fr}#viewer-wrapper{height:100%;min-height:0}#sidebar{top:var(--topbar-height);z-index:50;border-right:1px solid var(--panel-border);width:min(88vw,380px);max-width:380px;transition:transform .2s;position:fixed;bottom:0;left:0;transform:translate(-102%);box-shadow:0 6px 18px #00000040}#sidebar-resizer{display:none}body.sidebar-open #sidebar{transform:translate(0)}body.sidebar-open .sidebar-expand-btn{pointer-events:none;visibility:hidden}.viewer-toolbar-category-btn{justify-content:center;gap:0;min-width:44px;min-height:44px;padding:8px 10px;position:relative}.viewer-toolbar-category-btn .viewer-toolbar-btn__label{clip:rect(0, 0, 0, 0);clip-path:inset(50%);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}.viewer-toolbar-category-btn svg{width:18px;height:18px}.viewer-toolbar-subpanel{width:var(--viewer-toolbar-ref-width,min(calc(100vw - 24px), 300px));max-width:var(--viewer-toolbar-ref-width,min(calc(100vw - 24px), 300px));max-height:min(52vh,420px);overflow:hidden auto}.viewer-toolbar-subpanel__bar{flex-direction:column;align-items:stretch;gap:3px;padding:6px 8px}.viewer-toolbar-sheet{flex-direction:column;align-items:stretch;gap:3px;width:100%;max-width:100%}.viewer-toolbar-subpanel .viewer-toolbar-sep{display:none}.viewer-toolbar-subpanel .viewer-toolbar-btn{box-sizing:border-box;white-space:normal;text-align:left;justify-content:flex-start;gap:8px;width:100%;min-width:0;min-height:40px;padding:8px 10px;font-size:13px;font-weight:600;position:static}.viewer-toolbar-subpanel .viewer-toolbar-btn__label{clip:auto;clip-path:none;white-space:normal;border:0;width:auto;height:auto;margin:0;padding:0;position:static;overflow:visible}.viewer-toolbar-subpanel .viewer-toolbar-btn svg{width:16px;height:16px}.viewer-style-flyout{box-sizing:border-box;width:var(--viewer-toolbar-ref-width,min(calc(100vw - 24px), 220px));max-width:var(--viewer-toolbar-ref-width,min(calc(100vw - 24px), 220px));min-width:0;padding:6px 8px}.viewer-style-flyout-btn{gap:8px;min-height:40px;padding:8px 10px;font-size:13px}.viewer-style-flyout-btn svg{width:16px;height:16px}}@media (max-width:640px){#sidebar{width:auto;max-width:none;left:0;right:0}.sidebar-scroll{padding:6px!important}.sidebar-chrome{padding-left:6px;padding-right:6px}.topbar-icon-btn,.view-cube-home{width:32px;height:32px}#viewer-toolbar:not(.viewer-toolbar--collapsed){gap:2px;padding:4px 4px 4px 6px;bottom:10px}#viewer-toolbar.viewer-toolbar--collapsed{bottom:0}.viewer-toolbar-body{gap:2px}}.ifc-model-loader{z-index:15000;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);pointer-events:all;background:#0f172a59;justify-content:center;align-items:center;padding:24px;display:flex;position:fixed;inset:0}.ifc-model-loader[hidden]{display:none!important}.ifc-model-loader__panel{text-align:center;border:1px solid var(--panel-border);background:var(--panel-bg);max-width:360px;color:var(--text-color);border-radius:12px;flex-direction:column;align-items:center;padding:28px 32px;display:flex;box-shadow:0 20px 50px #0003}.ifc-model-loader__spinner{border:3px solid var(--bim-ui_bg-contrast-40);border-top-color:var(--bim-ui_main-base);border-radius:50%;width:44px;height:44px;margin-bottom:16px;animation:.85s linear infinite ifc-model-loader-spin}@keyframes ifc-model-loader-spin{to{transform:rotate(360deg)}}.ifc-model-loader__title{margin:0 0 8px;font-size:1.05rem;font-weight:700;line-height:1.3}.ifc-model-loader__filename{word-break:break-all;color:var(--bim-ui_bg-contrast-80);margin:0 0 12px;font-size:.88rem;line-height:1.35}.ifc-model-loader__hint{color:var(--bim-ui_bg-contrast-80);margin:0;font-size:.82rem;line-height:1.4}.ifc-modal-overlay{z-index:20000;-webkit-backdrop-filter:blur(3px);backdrop-filter:blur(3px);background:#0f172a73;justify-content:center;align-items:center;padding:20px;display:flex;position:fixed;inset:0}.ifc-modal-overlay[hidden]{display:none!important}.ifc-modal{border:1px solid var(--panel-border);background:var(--panel-bg);width:min(440px,100%);max-height:min(80vh,420px);color:var(--text-color);border-radius:10px;padding:20px 22px;overflow:auto;box-shadow:0 16px 40px #0000002e}.ifc-modal.about-app{box-sizing:border-box;width:min(520px,100%);max-width:100%;max-height:min(88vh,640px);padding:22px 24px 20px}.about-app__page-title{color:var(--text-color);letter-spacing:-.02em;margin:0 0 18px;font-size:1.125rem;font-weight:700;line-height:1.25}.about-app__card{border:1px solid var(--panel-border);background:var(--panel-bg);border-radius:10px;margin-bottom:14px;overflow:hidden}.about-app__card--legal{margin-bottom:16px;padding:16px 18px 18px}.about-app__brand-row{align-items:center;gap:14px;padding:16px 18px;display:flex}.about-app__logo-picture{flex-shrink:0;line-height:0;display:flex}.about-app__logo{object-fit:contain;border-radius:8px;width:44px;height:44px;display:block}.about-app__brand-name{letter-spacing:-.03em;color:var(--text-color);font-size:1.35rem;font-weight:700}.about-app__section{border-top:1px solid var(--panel-border);padding:14px 18px}.about-app__section--status{align-items:flex-start;gap:14px;display:flex}.about-app__status-icon-wrap{background:var(--bim-ui_main-base);width:27px;height:27px;color:var(--bim-ui_main-contrast);border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;display:flex}.about-app__status-check{width:10.5px;height:10.5px}.about-app__status-text{flex:1;min-width:0}.about-app__status-line{color:var(--text-color);margin:0 0 6px;font-size:.95rem;font-weight:600}.about-app__description{color:var(--text-color);margin:0 0 10px;font-size:.9rem;font-weight:400;line-height:1.5}.about-app__version-line{margin:0 0 6px;font-size:.9rem;line-height:1.4}.about-app__version-link{color:inherit;border-bottom:1px solid #0000;font-weight:500;text-decoration:none;transition:color .12s,border-color .12s}.about-app__version-link:hover{color:var(--bim-ui_main-base);border-bottom-color:#2563eb59}.about-app__engine-line{color:var(--bim-ui_bg-contrast-80);margin:0;font-size:.8125rem;line-height:1.45}.about-app__text-link{color:var(--bim-ui_main-base);font-weight:600;text-decoration:none}.about-app__text-link:hover{text-decoration:underline}.about-app__link-row{border-top:1px solid var(--panel-border);color:var(--text-color);justify-content:space-between;align-items:center;gap:12px;padding:12px 18px;font-size:.9rem;font-weight:500;text-decoration:none;transition:background-color .12s;display:flex}.about-app__link-row:hover{background:#3b82f614}.about-app__external-icon{opacity:.75;flex-shrink:0;width:16px;height:16px}.about-app__legal-lead{color:var(--text-color);margin:0 0 8px;font-size:.95rem}.about-app__copyright{color:var(--bim-ui_bg-contrast-80);margin:0 0 12px;font-size:.875rem;line-height:1.45}.about-app__legal-body{color:var(--bim-ui_bg-contrast-80);margin:0;font-size:.8125rem;line-height:1.55}.about-app__footer-actions{margin-top:0}.nav-help-panel-shell{z-index:30;pointer-events:none;position:absolute;inset:0}.nav-help-panel-shell[hidden]{display:none!important}.nav-help-panel__backdrop{z-index:0;box-sizing:border-box;cursor:pointer;appearance:none;width:100%;height:100%;font:inherit;color:inherit;pointer-events:auto;-webkit-backdrop-filter:blur(3px);background:#0f172a73;border:none;border-radius:0;margin:0;padding:0;display:block;position:absolute;inset:0}#nav-help-panel{z-index:1;pointer-events:auto;position:absolute;top:8px;left:50%;transform:translate(-50%)}.nav-help-panel__bar{background:var(--panel-bg);border:1px solid var(--panel-border);opacity:.94;border-radius:12px;align-items:center;gap:4px;padding:10px 14px;transition:opacity .15s;display:flex;box-shadow:0 2px 12px #00000029}.nav-help-panel__bar:hover{opacity:1}.nav-help-panel__group{align-items:center;gap:2px;display:flex}.nav-help-panel__group[hidden]{display:none!important}.nav-help-panel__item{-webkit-user-select:none;user-select:none;cursor:default;flex-direction:column;align-items:center;gap:6px;min-width:56px;padding:2px 10px;display:flex}.nav-help-panel__item svg{color:var(--bim-ui_bg-contrast-80);flex-shrink:0;display:block}.nav-help-panel__item .nav-help-panel__icon-img{object-fit:contain;flex-shrink:0;width:48px;height:48px;display:block}.nav-help-panel__lbl{color:var(--bim-ui_bg-contrast-80);white-space:nowrap;letter-spacing:.1px;font-size:11px;font-weight:600;line-height:1}.nav-help-panel__sep{background:var(--panel-border);flex-shrink:0;align-self:stretch;width:1px;min-height:68px;margin:0 2px}.nav-help-panel__cog{cursor:pointer;width:auto;min-width:44px;height:auto;color:var(--bim-ui_bg-contrast-80);background:0 0;border:none;border-radius:8px;flex-shrink:0;justify-content:center;align-self:stretch;align-items:center;margin-left:2px;padding:0 6px;transition:background .15s,color .15s;display:inline-flex}.nav-help-panel__cog-svg{flex-shrink:0;display:block}.nav-help-panel__cog:hover,.nav-help-panel__cog[aria-expanded=true]{color:var(--bim-ui_main-base);background:#3b82f61f}.nav-help-panel__cog:focus-visible{outline:2px solid var(--bim-ui_accent-base);outline-offset:2px}.nav-help-panel__menu{background:var(--panel-bg);border:1px solid var(--panel-border);z-index:1;border-radius:8px;min-width:180px;padding:4px 0;position:absolute;top:calc(100% + 6px);left:auto;right:0;transform:none;box-shadow:0 4px 20px #0000002e}.nav-help-panel__menu[hidden]{display:none!important}.nav-help-panel__menu-header{letter-spacing:.06em;text-transform:uppercase;color:var(--bim-ui_bg-contrast-80);padding:6px 12px 4px;font-size:10px;font-weight:700}.nav-help-panel__menu-item{cursor:pointer;width:100%;color:var(--text-color);text-align:left;box-sizing:border-box;background:0 0;border:none;align-items:center;gap:8px;padding:7px 12px;font-size:13px;transition:background .12s;display:flex}.nav-help-panel__menu-item:hover{background:#3b82f61a}.nav-help-panel__menu-check{width:14px;color:var(--bim-ui_main-base);text-align:center;flex-shrink:0;font-size:11px}.nav-help-panel__menu-sep{background:var(--panel-border);height:1px;margin:4px 0}@media (max-width:1024px){#nav-help-panel{box-sizing:border-box;width:-moz-fit-content;width:fit-content;max-width:calc(100% - 24px);top:50%;left:50%;transform:translate(-50%,-50%)}.nav-help-panel__bar{gap:2px;max-width:100%;padding:6px 8px}.nav-help-panel__item{min-width:46px;padding:2px 5px}.nav-help-panel__item .nav-help-panel__icon-img{width:40px;height:40px}.nav-help-panel__lbl{font-size:10px}.nav-help-panel__sep{min-height:56px;margin:0 1px}.nav-help-panel__cog{min-width:40px;padding:0 4px}}.ifc-modal__title{margin:0 0 12px;font-size:1.1rem;font-weight:700;line-height:1.3}.ifc-modal__body{margin:0 0 18px;font-size:.95rem;line-height:1.45}.ifc-modal__actions{flex-wrap:wrap;justify-content:flex-end;gap:10px;display:flex}.ifc-modal__actions--single{justify-content:stretch}.ifc-modal__actions--single .ifc-modal__btn{justify-content:center;width:100%}.ifc-modal__btn{cursor:pointer;border:1px solid var(--tree-button-border);border-radius:8px;align-items:center;gap:6px;padding:9px 16px;font-size:.9rem;font-weight:600;display:inline-flex}.ifc-modal__btn--secondary{background:var(--tree-button-bg);color:var(--tree-button-text)}.ifc-modal__btn--primary{background:var(--bim-ui_main-base);color:var(--bim-ui_main-contrast);border-color:var(--bim-ui_main-base)}.ifc-modal__btn:focus-visible{outline:2px solid var(--bim-ui_accent-base);outline-offset:2px}a.ifc-modal__btn{box-sizing:border-box;text-decoration:none}