:root{color-scheme:dark;--bg: #09090b;--panel: #18181bdd;--panel-solid: #18181b;--line: #27272a;--text: #fafafa;--muted: #a1a1aa;--accent: #6366f1;--surface-1: #09090b;--surface-2: #27272a;--surface-2-translucent: #27272acc;--surface-tabs-bg: #18181bcc;--surface-menu-bg: #18181bf2;--surface-modal-bg: #18181bf0;--surface-overlay-bg: rgba(9, 9, 11, .72);--surface-backdrop-bg: rgba(9, 9, 11, .52);--surface-card-bg: #18181b99;--surface-card-bg-soft: #27272a66;--surface-tile-bg: #6366f122;--surface-tile-active-bg: #6366f144;--danger: #ef4444;--danger-strong: #f87171;--shadow: rgba(0, 0, 0, .45);--shadow-strong: rgba(0, 0, 0, .6);--focus-ring: rgba(99, 102, 241, .55);--tree-dash: #3f3f46;--progress-track: #27272a;--selection-hud-fg: rgba(250, 250, 250, .78);--selection-hud-bg: rgba(9, 9, 11, .5);--selection-hud-bg-mobile: rgba(22, 24, 29, .92)}:root[data-theme=light]{color-scheme:light;--bg: #f4f5f8;--panel: #ffffffee;--panel-solid: #ffffff;--line: #e2e5ec;--text: #1b1d22;--muted: #596172;--accent: #4f46e5;--surface-1: #ffffff;--surface-2: #eceef3;--surface-2-translucent: #eceef3ee;--surface-tabs-bg: #ffffffd9;--surface-menu-bg: #ffffffee;--surface-modal-bg: #ffffffee;--surface-overlay-bg: rgba(27, 29, 34, .36);--surface-backdrop-bg: rgba(27, 29, 34, .2);--surface-card-bg: #ffffffee;--surface-card-bg-soft: #eceef3aa;--surface-tile-bg: #4f46e518;--surface-tile-active-bg: #4f46e533;--danger: #dc2626;--danger-strong: #b91c1c;--shadow: rgba(27, 29, 34, .1);--shadow-strong: rgba(27, 29, 34, .18);--focus-ring: rgba(79, 70, 229, .45);--tree-dash: #d6dae2;--progress-track: #eceef3;--selection-hud-fg: rgba(27, 29, 34, .72);--selection-hud-bg: rgba(255, 255, 255, .55);--selection-hud-bg-mobile: rgba(255, 255, 255, .94)}body.cde-embedded .side-rail-brand-title{letter-spacing:-.02em}body.cde-embedded #settings-theme-select:disabled{opacity:.65;cursor:not-allowed}html{height:100%;height:100dvh}html,body{margin:0;width:100%;height:100%;min-height:100dvh;overflow:hidden;font-family:system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;background:var(--bg);color:var(--text);-webkit-text-size-adjust:100%}#app{position:relative;width:100%;height:100%;min-height:100dvh;min-height:-webkit-fill-available}#viewer{width:100%;height:100%;display:block}.ifc-tabs{position:absolute;top:max(10px,env(safe-area-inset-top,0px));left:50%;transform:translate(-50%);z-index:17;display:flex;gap:8px;max-width:calc(100vw - 16px - env(safe-area-inset-left,0px) - env(safe-area-inset-right,0px));overflow-x:auto;padding:4px;border-radius:12px;background:var(--surface-tabs-bg);border:1px solid var(--line);backdrop-filter:blur(4px);-webkit-overflow-scrolling:touch;scrollbar-width:thin}.ifc-tab-btn{border:1px solid var(--line);border-radius:8px;padding:0;font-size:12px;background:var(--surface-2-translucent);color:var(--text);cursor:pointer;white-space:nowrap;max-width:220px;overflow:hidden;text-overflow:ellipsis}.ifc-tab-btn.is-active{border-color:var(--accent);background:var(--surface-tile-active-bg)}.ifc-tab-inner{display:grid;grid-template-columns:1fr auto;align-items:center;gap:6px;min-width:80px;max-width:220px;padding:7px 8px 7px 10px}.ifc-tab-label{overflow:hidden;text-overflow:ellipsis}.ifc-tab-close{border:1px solid var(--line);border-radius:6px;width:18px;height:18px;line-height:16px;text-align:center;font-size:12px;color:var(--muted);background:var(--surface-card-bg);padding:0;cursor:pointer}.ifc-tab-close:hover{color:var(--danger);border-color:var(--danger-strong);transform:none}.ifc-tab-plus{font-weight:700;min-width:36px;text-align:center;padding:7px 10px}.ifc-tab-plus:disabled{opacity:.45;cursor:not-allowed}.ifc-add-menu{position:absolute;z-index:30;box-sizing:border-box;width:min(340px,calc(100vw - 16px - env(safe-area-inset-left,0px) - env(safe-area-inset-right,0px)));min-width:0;max-width:calc(100vw - 16px);padding:10px;padding-bottom:max(10px,env(safe-area-inset-bottom,0px));border-radius:12px;border:1px solid var(--line);background:var(--surface-menu-bg);box-shadow:0 12px 30px var(--shadow);display:none;gap:8px}.ifc-add-menu.is-open{display:grid}.ifc-add-menu-row{display:grid;grid-template-columns:1fr;gap:8px}.ifc-add-menu .hint{margin:0;font-size:11px}.ifc-add-source-btn{padding:8px 10px;font-size:12px;border-radius:8px}.ifc-add-yandex-head{display:grid;grid-template-columns:1fr auto auto auto;gap:6px;align-items:center}.ifc-add-yandex-head button{width:28px;height:28px;padding:0;line-height:26px;border-radius:8px;font-size:14px;text-align:center}.ifc-add-yandex-head button.is-loading{position:relative;color:transparent;pointer-events:none}.ifc-add-yandex-head button.is-loading:after{content:"";position:absolute;inset:0;margin:auto;width:14px;height:14px;border:2px solid var(--accent);border-top-color:transparent;border-radius:50%;animation:cde-btn-spin .8s linear infinite}@keyframes cde-btn-spin{to{transform:rotate(360deg)}}.ifc-add-yandex-list{width:100%;min-height:120px;border-radius:8px;border:1px solid var(--line);background:var(--surface-2-translucent);color:var(--text);font-size:12px;padding:6px}.ifc-add-presentation-head{margin-bottom:6px}.ifc-presentation-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px}.ifc-presentation-card{display:flex;flex-direction:column;gap:4px;padding:6px;border-radius:10px;border:1px solid var(--line);background:var(--surface-2-translucent);text-align:left;min-height:44px;min-width:0;cursor:pointer;color:var(--text)}.ifc-presentation-card.is-loading{opacity:.55;pointer-events:none}.ifc-presentation-thumb{width:100%;aspect-ratio:4 / 3;object-fit:cover;border-radius:6px;background:var(--surface-1);border:1px solid var(--line);display:block}.ifc-presentation-title{font-size:11px;font-weight:600;color:var(--text);white-space:normal;overflow-wrap:break-word;line-height:1.25;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.ifc-presentation-meta-row{display:flex;align-items:center;justify-content:space-between;gap:4px;min-width:0}.ifc-presentation-meta{font-size:10px;color:var(--muted);min-width:0}.ifc-presentation-copy{flex:0 0 auto;display:inline-flex;align-items:center;justify-content:center;width:22px;height:22px;padding:0;border-radius:6px;color:var(--muted)}.ifc-presentation-copy svg{pointer-events:none}.ifc-presentation-copy.is-copied{color:var(--accent);border-color:var(--accent)}.side-rail-backdrop{display:none;position:fixed;inset:0;z-index:15;background:var(--surface-backdrop-bg);backdrop-filter:blur(3px);-webkit-tap-highlight-color:transparent}.side-rail-backdrop.is-visible{display:block}.side-rail{position:absolute;top:0;left:0;height:100%;max-height:100dvh;z-index:16;display:flex;flex-direction:column;background:var(--panel);backdrop-filter:blur(8px);border-right:1px solid var(--line);box-shadow:4px 0 28px var(--shadow);transition:width .22s ease;overflow:hidden;-webkit-overflow-scrolling:touch}.side-rail.is-collapsed{box-sizing:border-box;width:46px;min-width:46px;max-width:46px}.side-rail.is-expanded{width:min(368px,calc(100vw - 16px));background:#18181bc7}:root[data-theme=light] .side-rail.is-expanded{background:#ffffffdb}.side-rail-brand{display:flex;align-items:center;gap:10px;padding:12px 8px;border-bottom:1px solid var(--line);flex-shrink:0}.side-rail.is-collapsed .side-rail-brand{flex-direction:column;justify-content:flex-start;gap:8px;padding:10px 6px}.side-rail.is-collapsed .header-logo{display:none}.side-rail.is-expanded .header-logo{width:52px;height:52px}.side-rail.is-expanded .side-rail-brand{box-sizing:border-box;display:grid;grid-template-columns:46px minmax(0,1fr);align-items:center;column-gap:8px;height:69px;padding:0 10px 0 0;overflow:hidden}.side-rail.is-expanded .side-rail-toggle{grid-column:1;grid-row:1;justify-self:center}.side-rail.is-expanded .header-logo,.side-rail.is-expanded .side-rail-brand-text{grid-column:2;grid-row:1}.side-rail.is-expanded .side-rail-brand-text{margin-left:60px}.header-logo{border-radius:0;object-fit:contain;border:none;flex:0 0 auto;width:52px;height:52px}.side-rail-brand-text{flex:1;min-width:0;display:none}.side-rail.is-expanded 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.ifc-add-menu-row{margin-top:8px}#compare-cde-block[hidden]{display:none}.compare-pair{display:flex;flex-direction:column;gap:4px}.compare-pair-row{display:flex;align-items:baseline;justify-content:space-between;gap:8px}.compare-pair-label-group{display:inline-flex;align-items:center;gap:5px;flex:0 0 auto}.compare-pair-label{font-size:11px;text-transform:uppercase;letter-spacing:.04em;color:var(--muted);flex:0 0 auto}.section-head-row{display:flex;align-items:center;gap:6px;margin:0 0 10px}.section-head-row .side-rail-section-head{margin:0}.help-icon{display:inline-flex;align-items:center;justify-content:center;width:15px;height:15px;flex:0 0 auto;border-radius:50%;border:1px solid var(--line);background:var(--surface-2-translucent);color:var(--muted);font-size:10px;font-weight:700;line-height:1;cursor:help;user-select:none;transition:.15s 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auto}.compare-pair-value{font-size:12px;font-weight:600;color:var(--text);text-align:right;word-break:break-word}.compare-pair-sep{align-self:center;font-size:14px;color:var(--muted);line-height:1}.compare-load-panel .compare-hidden-file-input{position:absolute;width:1px;height:1px;opacity:0;pointer-events:none;left:-9999px;top:0}.muted{color:var(--muted);font-size:13px;line-height:1.45;margin:0 0 12px}.controls{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin-bottom:10px}.share-link-row{display:flex;align-items:center;gap:6px;margin-bottom:10px}.share-link-row #share-link-btn{flex-shrink:0;white-space:nowrap}.share-link-url-input{flex:1;min-width:0;font-size:11px;padding:6px 8px;border:1px solid var(--line);border-radius:8px;background:var(--surface-1);color:var(--muted);cursor:text;user-select:all}.share-link-copy-btn{flex-shrink:0;padding:6px 10px;font-size:16px;line-height:1}button{border:1px solid var(--line);border-radius:8px;padding:10px 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var(--line);padding-top:10px;font-size:13px;color:var(--muted);line-height:1.5;white-space:pre-wrap}.selection-hud{box-sizing:border-box;position:absolute;z-index:14;right:max(14px,env(safe-area-inset-right,0px));bottom:max(14px,env(safe-area-inset-bottom,0px));left:auto;max-width:min(300px,42vw);margin:0;padding:7px 9px;border:none;border-radius:8px;background:var(--selection-hud-bg);color:var(--selection-hud-fg);font-family:inherit;font-size:12px;line-height:1.35;white-space:pre-wrap;overflow-wrap:anywhere;pointer-events:none;user-select:none}.selection-hud.is-empty{display:none}@media (max-width: 932px),(pointer: coarse){.selection-hud{font-size:13px;line-height:1.4;padding:8px 10px;max-width:min(220px,calc(100vw - 72px));color:var(--text);background:var(--selection-hud-bg-mobile);border:1px solid var(--line)}}.hint{margin-top:8px;font-size:12px;color:var(--muted)}.measure-history{margin:8px 0 0;padding-left:18px;font-size:12px;color:var(--muted);max-height:120px;overflow:auto}.measure-history li{margin-bottom:4px;line-height:1.35;display:flex;justify-content:space-between;gap:8px;align-items:center}.measure-controls-row{display:grid;grid-template-columns:1fr auto;gap:8px;align-items:center;margin-top:8px}.measure-controls-row label{font-size:12px;color:var(--muted)}.measure-controls-row select{padding:6px 8px;border-radius:8px;border:1px solid var(--line);background:var(--surface-2-translucent);color:var(--text);font-size:12px}.measure-delete-btn{padding:2px 8px;font-size:11px}.filter-block{margin-top:10px;border-top:1px solid var(--line);padding-top:10px}.filter-grid{display:grid;grid-template-columns:1fr;gap:8px;margin-top:8px}.filter-grid label{font-size:12px;color:var(--muted);display:grid;gap:4px}.filter-grid select,.filter-grid input{padding:7px 8px;border-radius:8px;border:1px solid var(--line);background:var(--surface-2-translucent);color:var(--text);font-size:12px}.filter-row{display:grid;grid-template-columns:1fr 1fr;gap:8px}.filter-grid .compare-show-removed{display:flex;flex-direction:row;align-items:center;gap:8px;margin-top:8px;font-size:12px;color:var(--text);cursor:pointer}.filter-grid .compare-show-removed input{flex:0 0 auto;margin:0}.compare-show-removed input:disabled+span{color:var(--muted);cursor:default}.compare-stats{margin-top:8px;font-size:12px;color:var(--muted);line-height:1.4;white-space:pre-wrap}.modal-overlay{position:fixed;inset:0;background:var(--surface-overlay-bg);backdrop-filter:blur(6px);z-index:200;display:none;align-items:center;justify-content:center;padding:max(12px,env(safe-area-inset-top,0px)) max(12px,env(safe-area-inset-right,0px)) max(12px,env(safe-area-inset-bottom,0px)) max(12px,env(safe-area-inset-left,0px))}#annotation-list-overlay{z-index:200}#annotation-form-overlay{z-index:210}.modal-overlay.is-open{display:flex}.modal{width:min(520px,100%);max-height:min(88dvh,720px);overflow:hidden;display:flex;flex-direction:column;background:var(--surface-modal-bg);border:1px solid var(--line);border-radius:14px;box-shadow:0 24px 60px var(--shadow-strong)}.modal--wide{width:min(640px,100%)}.modal-head{padding:14px 16px;border-bottom:1px solid var(--line);font-weight:700;font-size:16px;flex:0 0 auto}.modal-body{padding:14px 16px;overflow-y:auto;flex:1 1 auto;display:flex;flex-direction:column;gap:10px}.modal-foot{padding:12px 16px;border-top:1px solid var(--line);display:flex;flex-wrap:wrap;gap:8px;justify-content:flex-end;flex:0 0 auto}.form-grid label{display:grid;gap:6px;font-size:12px;color:var(--muted)}.form-grid .annotation-desc-field{display:grid;gap:6px;margin:0}.form-grid .annotation-desc-field-label{font-size:12px;color:var(--muted)}.form-grid 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9px;font-size:12px;border-radius:8px}.annotation-list{display:flex;flex-direction:column;gap:10px}.annotation-card{border:1px solid var(--line);border-radius:12px;padding:12px;background:var(--surface-card-bg)}.annotation-card-head{font-weight:600;margin-bottom:6px;font-size:14px}.annotation-card-meta{font-size:12px;color:var(--muted);line-height:1.45;margin-bottom:8px}.annotation-card-actions{display:flex;flex-wrap:wrap;gap:8px}.annotation-card-actions button{padding:6px 10px;font-size:12px}.annotation-card-preview{font-size:12px;color:var(--text);max-height:64px;overflow:hidden;opacity:.9}.panel-annotate-row{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin-top:10px}.ifc-tree{margin-top:8px;max-height:55vh;overflow:auto;padding:6px 4px;border:1px solid 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