@font-face{font-family:Inter;font-style:normal;font-display:swap;font-weight:400;src:url(/assets/inter-latin-400-normal-C38fXH4l.woff2) format("woff2"),url(/assets/inter-latin-400-normal-CyCys3Eg.woff) format("woff")}@font-face{font-family:Inter;font-style:normal;font-display:swap;font-weight:500;src:url(/assets/inter-latin-500-normal-Cerq10X2.woff2) format("woff2"),url(/assets/inter-latin-500-normal-BL9OpVg8.woff) format("woff")}@font-face{font-family:Inter;font-style:normal;font-display:swap;font-weight:600;src:url(/assets/inter-latin-600-normal-LgqL8muc.woff2) format("woff2"),url(/assets/inter-latin-600-normal-CiBQ2DWP.woff) format("woff")}@font-face{font-family:Inter;font-style:normal;font-display:swap;font-weight:700;src:url(/assets/inter-latin-700-normal-Yt3aPRUw.woff2) format("woff2"),url(/assets/inter-latin-700-normal-BLAVimhd.woff) format("woff")}[data-theme=dark],[data-theme=light]{--font-sans: "Inter", ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;--viewport-corner-inset: .85rem;--viewport-active-object-chip-block: 2.25rem;--viewport-processing-chrome-gap: .5rem;--embed-on-prem-update-banner-bottom: calc(var(--viewport-corner-inset) + 4.5rem)}.icon-logo-mono{filter:var(--icon-logo-mono-filter)}.icon-logo-antinode{filter:var(--icon-logo-antinode-filter)}.icon-logo-amaira{filter:var(--icon-logo-amaira-filter)}[data-theme=dark]{color-scheme:dark;--bg-app: #09090b;--bg-sidebar: #0f1115;--bg-viewport: #606366;--bg-elevated: #18181b;--bg-hover: #27272a;--bg-input: #18181b;--text-primary: #f4f4f5;--text-secondary: #a1a1aa;--text-muted: #71717a;--border-subtle: rgba(255, 255, 255, .1);--border-strong: rgba(255, 255, 255, .18);--border-focus: rgba(91, 141, 239, .55);--card-bg: #141417;--card-border: #3f3f46;--card-inset-bg: #1c1c1f;--card-inset-border: #52525b;--accent: #5b8def;--accent-soft: rgba(91, 141, 239, .16);--accent-border: rgba(91, 141, 239, .45);--accent-active-text: #dbeafe;--accent-ring: rgba(91, 141, 239, .28);--danger: #f87171;--success: #34d399;--success-soft: rgba(52, 211, 153, .14);--success-border: rgba(52, 211, 153, .4);--error-border: rgba(248, 113, 113, .4);--warning: #f59e0b;--warning-soft: rgba(245, 158, 11, .14);--accent-contrast: #f8fafc;--progress-fill: linear-gradient(90deg, #38bdf8, #6366f1);--progress-fill-ready: linear-gradient(90deg, #34d399, #10b981);--progress-fill-error: linear-gradient(90deg, #f87171, #ef4444);--rubber-band-border: #facc15;--rubber-band-bg: rgba(250, 204, 21, .12);--radius-sm: 8px;--radius-md: 12px;--select-bg: var(--bg-elevated);--select-border: var(--border-subtle);--select-chevron: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12' fill='none'%3E%3Cpath d='M2.5 4.5 6 8l3.5-3.5' stroke='%23a1a1aa' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");--shadow-panel: 0 16px 48px rgba(0, 0, 0, .35);--floating-surface-bg: rgba(15, 17, 21, .82);--overlay-surface-bg: rgba(15, 17, 21, .9);--overlay-backdrop: rgba(9, 9, 11, .55);--embed-surface-bg: #0f1115;--embed-muted-text: #9aa3b2;--scene-tree-hover: rgba(255, 255, 255, .05);--scene-tree-selected: rgba(91, 141, 239, .2);--scene-tree-collapse-fg: var(--text-secondary);--scene-tree-collapse-bg: color-mix(in srgb, var(--bg-elevated) 70%, transparent);--scene-tree-collapse-border: color-mix(in srgb, var(--text-muted) 40%, transparent);--scene-tree-collapse-hover-fg: var(--text-primary);--scene-tree-collapse-hover-border: color-mix(in srgb, var(--accent) 40%, transparent);--rail-active-bg: rgba(91, 141, 239, .16);--rail-active-border: rgba(91, 141, 239, .45);--rail-handle-hover: rgba(91, 141, 239, .35);--rail-collapsed-edge-shadow: inset 10px 0 16px -12px rgba(0, 0, 0, .28);--hud-surface-bg: rgba(24, 24, 27, .82);--hud-submenu-bg: rgba(39, 39, 42, .92);--hud-border: rgba(255, 255, 255, .2);--hud-highlight: rgba(255, 255, 255, .1);--hud-shadow: 0 10px 32px rgba(0, 0, 0, .4);--hud-submenu-shadow: 0 10px 28px rgba(0, 0, 0, .38);--hud-icon: #f4f4f5;--hud-icon-muted: #a1a1aa;--hud-icon-hover: #ffffff;--hud-icon-active: #ffffff;--hud-btn-hover-bg: rgba(91, 141, 239, .22);--hud-btn-active-bg: rgba(52, 211, 153, .28);--hud-btn-pinned-bg: rgba(91, 141, 239, .2);--hud-accent-ring: rgba(91, 141, 239, .45);--hud-accent-ring-strong: rgba(91, 141, 239, .65);--hud-build-ring: rgba(125, 211, 252, .55);--hud-badge-bg: #0ea5e9;--hud-badge-text: #0b1220;--hud-badge-ring: rgba(255, 255, 255, .35);--hud-scrollbar-thumb: rgba(255, 255, 255, .25);--hud-status-text: #7dd3fc;--panel-card-border: var(--card-border);--panel-card-bg: var(--card-bg);--panel-inset-border: var(--card-inset-border);--panel-inset-bg: var(--card-inset-bg);--vu-glass-bg: var(--hud-surface-bg);--vu-glass-submenu-bg: var(--hud-submenu-bg);--vu-glass-border: var(--hud-border);--vu-glass-highlight: var(--hud-highlight);--vu-glass-text: var(--hud-icon);--vu-glass-shadow: var(--hud-submenu-shadow);--vu-menu-hover-bg: var(--hud-btn-hover-bg);--vu-menu-hover-text: var(--hud-icon-hover);--vu-menu-active-bg: var(--hud-btn-active-bg);--vu-menu-active-text: var(--hud-icon-active);--vu-pinned-bg: var(--hud-btn-pinned-bg);--vu-scrollbar-thumb: var(--hud-scrollbar-thumb);--spinner-track: rgba(255, 255, 255, .14);--progress-track-bg: rgba(255, 255, 255, .1);--toast-error-text: #fecaca;--cloud-progress-bg: rgba(24, 24, 27, .92);--icon-logo-mono-filter: brightness(0) invert(.72);--icon-logo-antinode-filter: var(--icon-logo-mono-filter);--icon-logo-amaira-filter: drop-shadow(0 2px 8px rgb(0 0 0 / .18));--icon-logo-threejs-filter: invert(1) brightness(1.15);--landing-bg: radial-gradient(circle at top left, rgba(56, 189, 248, .12), transparent 40%), radial-gradient(circle at bottom right, rgba(91, 141, 239, .16), transparent 45%), linear-gradient(180deg, #09090b 0%, #0f1115 100%);--landing-card-bg: rgba(15, 17, 21, .92);--landing-eyebrow: #93c5fd;--landing-btn-bg: #e4e4e7;--landing-btn-text: #18181b;--landing-btn-hover-bg: #fafafa}[data-theme=light]{color-scheme:light;--bg-app: #f1f5f9;--bg-sidebar: #ffffff;--bg-viewport: #e2e8f0;--bg-elevated: #ffffff;--bg-hover: #f1f5f9;--bg-input: #ffffff;--text-primary: #0f172a;--text-secondary: #475569;--text-muted: #64748b;--border-subtle: rgba(15, 23, 42, .12);--border-strong: rgba(15, 23, 42, .22);--border-focus: rgba(59, 130, 246, .55);--card-bg: #ffffff;--card-border: #94a3b8;--card-inset-bg: #f8fafc;--card-inset-border: #cbd5e1;--accent: #2563eb;--accent-soft: rgba(37, 99, 235, .1);--accent-border: rgba(37, 99, 235, .45);--accent-active-text: #1d4ed8;--accent-ring: rgba(37, 99, 235, .2);--danger: #dc2626;--success: #16a34a;--success-soft: rgba(22, 163, 74, .1);--success-border: rgba(22, 163, 74, .4);--error-border: rgba(220, 38, 38, .35);--warning: #d97706;--warning-soft: rgba(217, 119, 6, .12);--accent-contrast: #f8fafc;--progress-fill: linear-gradient(90deg, #0ea5e9, #4f46e5);--progress-fill-ready: linear-gradient(90deg, #16a34a, #059669);--progress-fill-error: linear-gradient(90deg, #f87171, #dc2626);--rubber-band-border: #ca8a04;--rubber-band-bg: rgba(202, 138, 4, .14);--radius-sm: 8px;--radius-md: 12px;--select-bg: var(--card-inset-bg);--select-border: var(--card-inset-border);--select-chevron: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12' fill='none'%3E%3Cpath d='M2.5 4.5 6 8l3.5-3.5' stroke='%23475569' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");--shadow-panel: 0 16px 48px rgba(15, 23, 42, .1);--floating-surface-bg: rgba(255, 255, 255, .92);--overlay-surface-bg: rgba(255, 255, 255, .96);--overlay-backdrop: rgba(241, 245, 249, .75);--embed-surface-bg: #ffffff;--embed-muted-text: #64748b;--scene-tree-hover: rgba(15, 23, 42, .05);--scene-tree-selected: rgba(37, 99, 235, .12);--scene-tree-collapse-fg: var(--text-secondary);--scene-tree-collapse-bg: color-mix(in srgb, var(--card-inset-bg) 85%, transparent);--scene-tree-collapse-border: color-mix(in srgb, var(--text-muted) 45%, transparent);--scene-tree-collapse-hover-fg: var(--text-primary);--scene-tree-collapse-hover-border: color-mix(in srgb, var(--accent) 45%, transparent);--rail-active-bg: rgba(37, 99, 235, .1);--rail-active-border: rgba(37, 99, 235, .4);--rail-handle-hover: rgba(37, 99, 235, .25);--rail-collapsed-edge-shadow: inset 10px 0 16px -12px rgba(15, 23, 42, .1);--hud-surface-bg: rgba(255, 255, 255, .94);--hud-submenu-bg: #ffffff;--hud-border: rgba(15, 23, 42, .2);--hud-highlight: rgba(255, 255, 255, 1);--hud-shadow: 0 10px 32px rgba(15, 23, 42, .12);--hud-submenu-shadow: 0 10px 28px rgba(15, 23, 42, .1);--hud-icon: #0f172a;--hud-icon-muted: #475569;--hud-icon-hover: #020617;--hud-icon-active: #14532d;--hud-btn-hover-bg: rgba(37, 99, 235, .12);--hud-btn-active-bg: rgba(22, 163, 74, .16);--hud-btn-pinned-bg: rgba(37, 99, 235, .12);--hud-accent-ring: rgba(37, 99, 235, .4);--hud-accent-ring-strong: rgba(37, 99, 235, .55);--hud-build-ring: rgba(37, 99, 235, .45);--hud-badge-bg: #0284c7;--hud-badge-text: #f8fafc;--hud-badge-ring: rgba(15, 23, 42, .15);--hud-scrollbar-thumb: rgba(15, 23, 42, .22);--hud-status-text: #0369a1;--panel-card-border: var(--card-border);--panel-card-bg: var(--card-bg);--panel-inset-border: var(--card-inset-border);--panel-inset-bg: var(--card-inset-bg);--vu-glass-bg: var(--hud-surface-bg);--vu-glass-submenu-bg: var(--hud-submenu-bg);--vu-glass-border: var(--hud-border);--vu-glass-highlight: var(--hud-highlight);--vu-glass-text: var(--hud-icon);--vu-glass-shadow: var(--hud-submenu-shadow);--vu-menu-hover-bg: var(--hud-btn-hover-bg);--vu-menu-hover-text: var(--hud-icon-hover);--vu-menu-active-bg: var(--hud-btn-active-bg);--vu-menu-active-text: var(--hud-icon-active);--vu-pinned-bg: var(--hud-btn-pinned-bg);--vu-scrollbar-thumb: var(--hud-scrollbar-thumb);--spinner-track: rgba(15, 23, 42, .12);--progress-track-bg: rgba(15, 23, 42, .08);--toast-error-text: #b91c1c;--cloud-progress-bg: rgba(255, 255, 255, .96);--icon-logo-mono-filter: brightness(0) invert(.35);--icon-logo-antinode-filter: var(--icon-logo-mono-filter);--icon-logo-amaira-filter: drop-shadow(0 2px 10px rgb(15 23 42 / .14));--icon-logo-threejs-filter: none;--landing-bg: radial-gradient(circle at top left, rgba(37, 99, 235, .08), transparent 40%), radial-gradient(circle at bottom right, rgba(14, 165, 233, .1), transparent 45%), linear-gradient(180deg, #f1f5f9 0%, #ffffff 100%);--landing-card-bg: rgba(255, 255, 255, .96);--landing-eyebrow: #2563eb;--landing-btn-bg: #0f172a;--landing-btn-text: #f8fafc;--landing-btn-hover-bg: #1e293b}:root{font-family:var(--font-sans)}[data-theme=dark]{--bg-landing-story: #0b1018;--bg-landing-auth: #111318;--landing-lead: var(--text-secondary);--landing-section-kicker: var(--landing-eyebrow);--landing-title-vtk: #c4b5fd;--landing-title-usd: #67e8f9;--landing-title-threejs: #6ee7b7;--landing-story-bg: radial-gradient(circle at 18% 12%, rgba(56, 189, 248, .1), transparent 34%), radial-gradient(circle at 82% 88%, rgba(91, 141, 239, .12), transparent 38%), linear-gradient(160deg, var(--bg-app) 0%, var(--bg-landing-story) 48%, #10151f 100%);--landing-story-grid: linear-gradient(rgba(91, 141, 239, .09) 1px, transparent 1px), linear-gradient(90deg, rgba(91, 141, 239, .09) 1px, transparent 1px), linear-gradient(rgba(125, 211, 252, .045) 1px, transparent 1px), linear-gradient(135deg, rgba(125, 211, 252, .045) 1px, transparent 1px);--landing-story-grid-opacity: .55;--landing-panel-surface: color-mix(in srgb, var(--card-bg) 62%, transparent);--landing-panel-inset-highlight: color-mix(in srgb, var(--text-primary) 5%, transparent);--landing-pipeline-arrow: linear-gradient( 90deg, rgba(125, 211, 252, .2), rgba(91, 141, 239, .85) );--landing-pipeline-arrow-vertical: linear-gradient( 180deg, rgba(125, 211, 252, .2), rgba(91, 141, 239, .85) );--landing-pipeline-arrow-head: rgba(125, 211, 252, .9);--landing-threejs-logo-filter: var(--icon-logo-threejs-filter);--landing-toolbar-logo-filter: var(--icon-logo-mono-filter);--landing-toolbar-logo-hover-filter: brightness(0) invert(.95);--landing-auth-bg: var(--bg-landing-auth);--landing-signin-border: rgba(255, 255, 255, .18);--landing-signin-shadow: 0 0 0 1px rgba(255, 255, 255, .12), 0 4px 12px rgba(255, 255, 255, .08), 0 12px 28px rgba(91, 141, 239, .3), 0 20px 40px rgba(91, 141, 239, .14), inset 0 1px 0 rgba(255, 255, 255, .75);--landing-signin-shadow-hover: 0 0 0 1px rgba(255, 255, 255, .16), 0 5px 14px rgba(255, 255, 255, .1), 0 14px 34px rgba(91, 141, 239, .38), 0 24px 48px rgba(125, 211, 252, .18), inset 0 1px 0 rgba(255, 255, 255, .85);--landing-signin-glow: radial-gradient( circle at 50% 52%, rgba(255, 255, 255, .34) 0%, rgba(186, 214, 252, .22) 24%, rgba(91, 141, 239, .14) 50%, transparent 74% );--landing-signin-stage-glow: radial-gradient( circle, rgba(255, 255, 255, .05) 0%, rgba(91, 141, 239, .08) 38%, transparent 72% );--landing-signin-glow-opacity: .72}[data-theme=light]{--bg-landing-story: #eef2f7;--bg-landing-auth: #ffffff;--landing-lead: var(--text-secondary);--landing-section-kicker: var(--landing-eyebrow);--landing-title-vtk: #6d28d9;--landing-title-usd: #0369a1;--landing-title-threejs: #047857;--landing-story-bg: radial-gradient(circle at 18% 12%, rgba(37, 99, 235, .08), transparent 34%), radial-gradient(circle at 82% 88%, rgba(14, 165, 233, .1), transparent 38%), linear-gradient(160deg, #f8fafc 0%, var(--bg-landing-story) 48%, #e2e8f0 100%);--landing-story-grid: linear-gradient(rgba(37, 99, 235, .08) 1px, transparent 1px), linear-gradient(90deg, rgba(37, 99, 235, .08) 1px, transparent 1px), linear-gradient(rgba(14, 165, 233, .05) 1px, transparent 1px), linear-gradient(135deg, rgba(14, 165, 233, .05) 1px, transparent 1px);--landing-story-grid-opacity: .45;--landing-panel-surface: color-mix(in srgb, var(--card-bg) 72%, transparent);--landing-panel-inset-highlight: color-mix(in srgb, var(--text-primary) 4%, transparent);--landing-pipeline-arrow: linear-gradient( 90deg, rgba(37, 99, 235, .15), rgba(37, 99, 235, .85) );--landing-pipeline-arrow-vertical: linear-gradient( 180deg, rgba(37, 99, 235, .15), rgba(37, 99, 235, .85) );--landing-pipeline-arrow-head: rgba(37, 99, 235, .85);--landing-threejs-logo-filter: var(--icon-logo-threejs-filter);--landing-toolbar-logo-filter: var(--icon-logo-mono-filter);--landing-toolbar-logo-hover-filter: brightness(0) invert(.08);--landing-auth-bg: radial-gradient(circle at 50% 34%, rgba(37, 99, 235, .14), transparent 54%), radial-gradient(circle at 82% 78%, rgba(14, 165, 233, .1), transparent 42%), linear-gradient(180deg, #f8fafc 0%, var(--bg-landing-auth) 72%, #eef2f7 100%);--landing-signin-border: rgba(15, 23, 42, .12);--landing-signin-shadow: 0 0 0 1px rgba(15, 23, 42, .08), 0 12px 32px rgba(15, 23, 42, .28), 0 6px 18px rgba(15, 23, 42, .14), 0 22px 48px rgba(37, 99, 235, .14), inset 0 1px 0 rgba(255, 255, 255, .78);--landing-signin-shadow-hover: 0 0 0 1px rgba(15, 23, 42, .1), 0 16px 40px rgba(15, 23, 42, .34), 0 8px 22px rgba(15, 23, 42, .16), 0 26px 58px rgba(37, 99, 235, .18), inset 0 1px 0 rgba(255, 255, 255, .9);--landing-signin-glow: radial-gradient( circle at 50% 52%, rgba(255, 255, 255, .95) 0%, rgba(148, 163, 184, .24) 30%, rgba(37, 99, 235, .12) 55%, transparent 76% );--landing-signin-stage-glow: radial-gradient( circle, rgba(255, 255, 255, .62) 0%, rgba(148, 163, 184, .14) 42%, transparent 72% );--landing-signin-glow-opacity: .9}*{box-sizing:border-box}html,body{margin:0;width:100%;height:100%;overflow:hidden;background:var(--bg-app);color:var(--text-primary)}#app{margin:0;width:100%;height:100%;background:var(--bg-app);color:var(--text-primary);position:relative;display:flex;flex-direction:column;min-height:0;overflow:hidden}.hidden{display:none!important}.shell-help-overlay{position:fixed;inset:0;z-index:1000;background:var(--bg-app)}.shell-help-overlay__frame{display:block;width:100%;height:100%;border:0;background:var(--bg-app)}html[data-shell-route=session] #landing{display:none!important}html[data-shell-route=session] #app.viewer-shell{display:flex!important}.viewer-shell{width:100%;height:100%;min-height:0;display:flex;flex-direction:column;overflow:hidden;background:var(--bg-app)}.viewer-frame-host{position:relative;flex:1 1 0;min-height:0;width:100%;overflow:hidden}.viewer-frame{display:block;width:100%;height:100%;border:0;background:#606366}.viewer-mount-status{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:1.15rem;padding:1.5rem;background:radial-gradient(circle at 50% 35%,rgba(96,165,250,.08),transparent 42%),var(--bg-app);color:var(--text-secondary);text-align:center;line-height:1.5;pointer-events:none;z-index:2}.viewer-mount-status__stage{display:flex;align-items:center;justify-content:center}.viewer-mount-status__stage--transition{gap:1.1rem}.viewer-mount-status__logo{display:flex;align-items:center;justify-content:center;width:4.5rem;height:4.5rem;border-radius:1rem;background:var(--card-inset-bg);border:1px solid var(--border-subtle);box-shadow:var(--shadow-panel)}.viewer-mount-status__logo img{display:block;width:2.75rem;height:2.75rem;-o-object-fit:contain;object-fit:contain}.viewer-mount-status__logo--solo{width:5rem;height:5rem}.viewer-mount-status__logo--solo img{width:3.1rem;height:3.1rem}.viewer-mount-status__bridge{position:relative;width:3.25rem;height:2px;background:linear-gradient(90deg,color-mix(in srgb,var(--text-muted) 12%,transparent),color-mix(in srgb,var(--text-secondary) 70%,transparent),color-mix(in srgb,var(--text-muted) 12%,transparent));overflow:visible}.viewer-mount-status__arrow{position:absolute;top:50%;left:0;width:.55rem;height:.55rem;border-top:2px solid color-mix(in srgb,var(--text-secondary) 85%,transparent);border-right:2px solid color-mix(in srgb,var(--text-secondary) 85%,transparent);transform:translateY(-50%) rotate(45deg);animation:viewer-mount-arrow-travel 1.35s ease-in-out infinite}.viewer-mount-status__message{margin:0;max-width:22rem;font-size:.95rem;color:var(--text-secondary)}.viewer-mount-status--connecting-local .viewer-mount-status__logo--from,.viewer-mount-status--fallback-cloud .viewer-mount-status__logo--from{animation:viewer-mount-logo-out 1.35s ease-in-out infinite}.viewer-mount-status--connecting-local .viewer-mount-status__logo--to,.viewer-mount-status--fallback-cloud .viewer-mount-status__logo--to{animation:viewer-mount-logo-in 1.35s ease-in-out infinite}.viewer-mount-status--bootstrap-local .viewer-mount-status__logo--solo,.viewer-mount-status--connecting-cloud .viewer-mount-status__logo--solo{animation:viewer-mount-logo-pulse 1.5s ease-in-out infinite}@keyframes viewer-mount-logo-out{0%,to{opacity:1;transform:scale(1)}50%{opacity:.45;transform:scale(.92)}}@keyframes viewer-mount-logo-in{0%,to{opacity:.55;transform:scale(.92)}50%{opacity:1;transform:scale(1.04)}}@keyframes viewer-mount-logo-pulse{0%,to{opacity:.72;transform:scale(.96);box-shadow:var(--shadow-panel)}50%{opacity:1;transform:scale(1.04);box-shadow:0 14px 36px color-mix(in srgb,var(--accent) 22%,transparent)}}@keyframes viewer-mount-arrow-travel{0%{left:0;opacity:.2}50%{opacity:1}to{left:calc(100% - .55rem);opacity:.2}}.shell-fallback-overlay{position:absolute;inset:0;z-index:5;display:flex;align-items:center;justify-content:center;padding:1.5rem;background:var(--overlay-backdrop);pointer-events:none;animation:shell-fallback-overlay-in .18s ease-out}.shell-fallback-notice{max-width:22rem;padding:1rem 1.25rem;border-radius:.625rem;border:1px solid var(--accent-border);background:var(--overlay-surface-bg);box-shadow:var(--shadow-panel);color:var(--text-primary);font-size:.92rem;line-height:1.5;text-align:center}@keyframes shell-fallback-overlay-in{0%{opacity:0}to{opacity:1}}.landing-page{position:fixed;inset:0;z-index:50;background:var(--bg-app)}.landing-page.hidden{display:none}.landing-split{display:grid;grid-template-columns:minmax(0,1fr) 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