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1.5rem)}#load-overlay:not([hidden])~#error-banner,#element-link-notice:not([hidden])~#error-banner{bottom:5.5rem}#welcome-drop-zone,#welcome-panel,#about-panel{position:absolute}#welcome-drop-zone{top:20px;left:15%;right:15%;bottom:calc(75% - 20px);z-index:2;display:flex;flex-direction:column;align-items:center;justify-content:center;box-sizing:border-box;border:2px dotted var(--accent);border-radius:8px;background:var(--drop-bg);color:var(--accent-text);font-size:1.7rem;font-weight:600;padding:0 1.5rem;pointer-events:none;text-align:center;white-space:normal;transition:top .12s ease,right .12s ease,bottom .12s ease,left .12s ease,background-color .12s ease,box-shadow .12s ease,font-size .12s ease}#welcome-drop-zone .drop-formats{font-size:.7em}#welcome-drop-zone .drop-privacy{margin-top:.5rem;font-size:.6em;font-weight:400}#welcome-panel,#about-panel{top:50%;left:50%;transform:translate(-50%,-50%);display:flex;flex-direction:column;align-items:center;gap:1.1rem;width:min(380px,85%);padding:2.5rem 2.25rem;background:#e7e9ed;border:1px solid rgba(55,68,93,.1);border-radius:10px}#welcome-panel{top:66.666%;background:#e7e9ed80}#about-panel{top:66.666%;z-index:4}#welcome-drop-zone[hidden],#welcome-panel[hidden],#about-panel[hidden]{display:none}#viewport-container.dragging.drop-welcome #welcome-drop-zone{inset:12px;z-index:5;background:light-dark(rgba(207,225,249,.7),rgba(42,68,103,.7));box-shadow:inset 0 0 0 2px color-mix(in srgb,var(--accent) 40%,transparent);font-size:3.1rem}.brand-title{display:flex;align-items:center;gap:0;margin:0;color:#0c1d2e;font-family:Inter,Segoe UI,Arial,sans-serif;font-size:1.7rem;font-weight:700;line-height:1}.brand-title span:last-child{color:#2e6db4;margin-left:.12rem}.brand-icon{width:36px;height:36px;flex:0 0 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.8rem;background:#e7e9edf5;border:1px solid #c6cbd4;border-radius:8px;box-shadow:0 8px 24px #23272e24;color:#23272e;font-size:.82rem}#model-details-dock.details-open~#ai-panel{bottom:calc(24px + 1.5rem)}#ai-header{display:flex;align-items:center;gap:.5rem;padding-right:2rem}#ai-title{font-weight:600;white-space:nowrap}.ai-beta{padding:.05rem .35rem;background:#2e6db4;border-radius:3px;color:#fff;font-size:.64rem;font-weight:600;letter-spacing:.04em;text-transform:uppercase;vertical-align:.08em}#ai-context{display:flex;flex:1 1 auto;gap:.35rem;min-width:0}.ai-chip{overflow:hidden;max-width:22rem;padding:.1rem .45rem;background:#f5f6f8;border:1px solid #c6cbd4;border-radius:999px;font-size:.76rem;text-overflow:ellipsis;white-space:nowrap}.ai-link{padding:0;background:none;border:0;color:#2e6db4;cursor:pointer;font-size:.76rem}#ai-close{top:.3rem;right:.35rem}#ai-settings{display:grid;grid-template-columns:1fr 1fr;gap:.4rem .8rem;padding:.45rem 0;border-top:1px solid #c6cbd4;border-bottom:1px solid #c6cbd4}#ai-settings label{display:flex;align-items:center;gap:.5rem}#ai-settings label span{flex:0 0 4.2rem}#ai-settings input,#ai-settings select,#ai-input{flex:1 1 auto;min-width:0;padding:.25rem .4rem;background:#f5f6f8;border:1px solid #b6bcc7;border-radius:4px;color:#23272e;font:inherit}#ai-settings input:disabled{opacity:.5}.ai-note,#ai-hint{grid-column:1 / -1;color:#5c6370;font-size:.76rem}#ai-transcript{display:flex;flex-direction:column;gap:.35rem;max-height:30vh;overflow-y:auto}#ai-transcript:empty{display:none}.ai-row{display:flex;gap:.6rem;line-height:1.4}.ai-who{flex:0 0 1.8rem;color:#5c6370;font-size:.76rem;line-height:1.55}.ai-body{flex:1 1 auto;min-width:0;white-space:pre-wrap;overflow-wrap:anywhere}.ai-row-user .ai-body{color:#4a505b}.ai-pending progress{display:block;width:100%;height:6px;margin-top:.3rem;accent-color:var(--accent)}.ai-actions{display:flex;flex-wrap:wrap;gap:.4rem;margin-top:.35rem}#ai-input-row{display:flex;align-items:flex-end;gap:.5rem}#ai-input{resize:none;line-height:1.4;overflow-y:auto;scrollbar-width:thin}#load-overlay[hidden],#element-link-notice[hidden]{display:none}#load-overlay,#element-link-notice{position:absolute;left:1rem;right:1rem;bottom:1rem;z-index:5;display:flex;align-items:center;gap:.75rem;max-width:720px;margin:0 auto;padding:.65rem .8rem;background:#e7e9edf5;border:1px solid #c6cbd4;border-radius:8px;box-shadow:0 8px 24px #23272e24;color:#23272e;pointer-events:auto}#model-details-dock.details-open~#load-overlay,#model-details-dock.details-open~#element-link-notice{bottom:calc(24px + 1.5rem)}#load-content{flex:1 1 auto;min-width:0}#element-link-notice{pointer-events:none;font-size:.85rem;line-height:1.35}#element-link-notice>div{min-width:0}#element-link-notice-detail{overflow:hidden;text-overflow:ellipsis;white-space:nowrap;margin-top:.2rem;font-size:.76rem;color:#5c6370}.element-link-spinner{flex:0 0 auto;width:16px;height:16px;border:2px solid #c6cbd4;border-top-color:var(--accent);border-radius:50%;animation:element-link-spin .8s linear infinite}@keyframes element-link-spin{to{transform:rotate(360deg)}}@media(prefers-reduced-motion:reduce){.element-link-spinner{animation:none}}#load-overlay:not([hidden])~#element-link-notice{bottom:5.5rem}#load-main-row{display:flex;align-items:center;gap:20px}#load-message{flex:0 1 auto;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;line-height:1.35;font-size:.85rem}#load-progress{flex:1 1 auto;min-width:260px;height:8px;accent-color:var(--accent)}#load-hint{display:block;margin-top:.28rem;color:#5c6370;font-size:.76rem;line-height:1.25;white-space:normal}#load-hint[hidden]{display:none}#load-cancel{flex:0 0 auto;height:24px;padding:0 .55rem;font-size:.8rem}#nav-key-hint[hidden]{display:none}#nav-key-hint{position:absolute;left:50%;bottom:1rem;z-index:4;transform:translate(-50%);max-width:min(520px,calc(100% - 2rem));padding:.4rem .65rem;background:#e7e9edf0;border:1px solid rgba(198,203,212,.9);border-radius:6px;color:#4a505b;font-size:.8rem;line-height:1.3;text-align:center;box-shadow:0 8px 24px #23272e24;pointer-events:none}#model-details-dock.details-open~#nav-key-hint{bottom:calc(24px + 1.5rem)}#terrain-credit{position:absolute;right:.75rem;bottom:5px;z-index:3;display:flex;align-items:center;gap:.5rem;height:20px;padding:0 .45rem;background:#e7e9ede6;border:1px solid rgba(198,203,212,.9);border-radius:2px;color:#4a505b;font-size:.72rem;white-space:nowrap}#terrain-credit[hidden]{display:none}#terrain-credit a{color:inherit}#model-details-dock.details-open~#terrain-credit{bottom:34px}#load-overlay:not([hidden])~#nav-key-hint,#element-link-notice:not([hidden])~#nav-key-hint{bottom:5.5rem}#status-bar{display:flex;align-items:center;gap:.4rem;height:34px;padding:0 .45rem;background:var(--bg-panel);border-top:1px solid var(--border);color:var(--text-dim);font-size:.76rem;font-variant-numeric:tabular-nums;flex:0 0 auto;overflow:hidden;white-space:nowrap}#status-bar button{flex:0 0 auto;min-width:46px;height:24px;padding:0 .55rem}#status-bar button svg{width:14px;height:14px;flex:0 0 auto;fill:none;stroke:currentColor;stroke-linecap:round;stroke-linejoin:round;stroke-width:1.8}#status-bar button:disabled{opacity:.5;cursor:default}#model-details-link{flex:0 0 auto;height:24px;padding:0 .55rem;font-size:.76rem}#model-details-dock.details-open #model-details-link{border-top-right-radius:0;border-bottom-right-radius:0}#viewport-container.dragging:not(.drop-welcome):before,#viewport-container.dragging:not(.drop-welcome):after{position:absolute;left:12px;right:12px;display:flex;align-items:center;justify-content:center;box-sizing:border-box;border:2px dotted var(--accent);border-radius:8px;background:var(--drop-bg);color:var(--accent-text);font-size:2rem;font-weight:600;padding:0 1.5rem;pointer-events:none;text-align:center;white-space:normal}#viewport-container.dragging:not(.drop-welcome):before{content:"Load dropped ifc/ifczip files";top:12px;bottom:12px}#viewport-container.dragging:not(.drop-welcome):after{display:none}#viewport-container.dragging:not(.drop-welcome).drop-split:before{content:"Clear viewer and load dropped ifc files";bottom:calc(50% + 6px)}#viewport-container.dragging:not(.drop-welcome).drop-split:after{content:"Append to previously loaded files";display:flex;top:calc(50% + 6px);bottom:12px}#viewport-container.dragging:not(.drop-welcome):not(.drop-split):before,#viewport-container.dragging:not(.drop-welcome).drop-split.drop-replace:before,#viewport-container.dragging:not(.drop-welcome).drop-split.drop-append:after{background:light-dark(rgba(207,225,249,.7),rgba(42,68,103,.7));box-shadow:inset 0 0 0 2px color-mix(in srgb,var(--accent) 40%,transparent)}#viewport-container.dragging:not(.drop-welcome).drop-split:after{border-color:#41816c;background:#41816c4d}#viewport-container.dragging:not(.drop-welcome).drop-split.drop-append:after{background:#41816cb3;box-shadow:inset 0 0 0 2px #41816c66}@media(max-width:700px){#load-overlay{align-items:stretch;flex-direction:column}#load-message{white-space:normal}#load-main-row{align-items:stretch;flex-direction:column}#load-progress{flex:0 0 auto;width:100%}#load-hint{width:100%}#load-cancel{align-self:flex-end}}#ai-body,#ai-chat{display:flex;flex-direction:column;gap:.45rem;min-width:0;min-height:0}#ai-panel.script-open{max-width:1180px}#ai-panel.script-open #ai-body{display:grid;grid-template-columns:minmax(0,3fr) minmax(0,2fr);gap:.7rem}#ai-panel.script-open #ai-transcript{max-height:min(46vh,430px);flex:1}#ai-script{display:flex;flex-direction:column;gap:.35rem;min-width:0}#ai-script[hidden],#script-tools[hidden]{display:none}#script-toolbar,#script-savebar,#script-tools{display:flex;flex-wrap:wrap;align-items:center;gap:.35rem}#script-toolbar button,#script-savebar button{padding:.25rem .6rem}#script-library{margin-left:auto;max-width:15rem}#script-name{width:9rem}#script-params{flex:1;min-width:8rem}#script-editor{height:min(26vh,250px);border:1px solid #c6cbd4;border-radius:6px;background:#fff;overflow:hidden}#script-editor .cm-editor{height:100%;font-size:.78rem}#script-editor textarea{width:100%;height:100%;border:0;padding:.4rem;resize:none;font:.78rem ui-monospace,Consolas,monospace;white-space:pre}#script-output{height:5rem;overflow:auto;padding:.3rem .45rem;border:1px solid #c6cbd4;border-radius:6px;background:#f7f8fa;font:.74rem ui-monospace,Consolas,monospace;white-space:pre-wrap}.script-info{color:#5b6472}.script-warn{color:#9a5b00}.script-error{color:#b3261e}@media(max-width:900px){#ai-panel.script-open #ai-body{grid-template-columns:minmax(0,1fr)}}#ai-panel:not([hidden])~#load-overlay,#ai-panel:not([hidden])~#element-link-notice,#ai-panel:not([hidden])~#nav-key-hint,#ai-panel:not([hidden])~#error-banner{top:1rem;bottom:auto}#settings-panel #licence-key{width:11rem}#licence-status{margin-top:-.2rem;font-size:.76rem;line-height:1.35;color:#5c6370}#licence-status[data-state=licensed]{color:#1b7a3a}#licence-status[data-state=invalid],#licence-status[data-state=expired]{color:#b3261e}#model-overview-overlay,#element-link-overlay{position:fixed;inset:0;width:100%;height:100%;pointer-events:none;z-index:3}.tree-row[data-model-id]{box-shadow:inset -3px 0 var(--model-overview-color, transparent)}#georeferencing-panel[hidden]{display:none}#georeferencing-panel{position:absolute;left:.75rem;right:.75rem;bottom:calc(24px + 1rem);z-index:5;height:var(--geo-panel-height);min-height:250px;display:flex;flex-direction:column;gap:.5rem;padding:.75rem 1rem;background:var(--bg-panel);color:var(--text);border:1px solid var(--border-strong);border-radius:6px;box-shadow:0 3px 16px #0002;font-size:.78rem;overflow:auto}.geo-header,.geo-fields,.geo-actions{display:flex;flex-wrap:wrap;align-items:center;gap:.4rem .7rem}.geo-header{padding-right:1.5rem}.geo-header h2{font-size:.95rem}#geo-close{position:absolute;top:.35rem;right:.35rem}#geo-model{max-width:min(400px,65%)}.geo-header span{color:var(--text-muted)}#georeferencing-panel input,#georeferencing-panel select,#georeferencing-panel button:not(.panel-close){font:inherit;padding:.22rem .35rem}.geo-fields label{display:flex;align-items:center;gap:.3rem}.geo-fields input{width:130px}.geo-fields input[type=number]{width:75px}#geo-metadata{flex-shrink:0;max-height:150px;overflow:auto}#geo-metadata summary{cursor:pointer;font-weight:600}#geo-details{white-space:pre-wrap;overflow-wrap:anywhere;padding:.4rem 0;font-size:.74rem}#geo-warnings{padding-left:1.1rem;color:#80531c}.geo-manual{position:relative}.geo-manual summary{cursor:pointer}.geo-manual>div{position:absolute;bottom:100%;left:0;padding:.7rem;width:390px;background:var(--bg-panel);border:1px solid var(--border-strong);box-shadow:0 3px 10px #0003;z-index:2}.geo-manual input{width:104px;margin:.4rem 0}.geo-confirm{display:flex;gap:.4rem;align-items:center}.geo-table{overflow:auto;flex:1;min-height:80px}.geo-table table{border-collapse:collapse;width:100%;text-align:left}.geo-table th{position:sticky;top:0;background:var(--bg-panel)}.geo-table th,.geo-table td{white-space:nowrap;padding:.28rem .4rem;border-bottom:1px solid var(--border-strong)}.geo-table td input{width:90px}.geo-table td span{display:block;max-width:260px;overflow:hidden;text-overflow:ellipsis;font-size:.72rem}.geo-table tr.selected{background:var(--row-hover);outline:1px solid var(--accent);outline-offset:-1px}.geo-table tr[data-result=FAIL] td:last-child{color:#ab2424;font-weight:700}.geo-table tr[data-result=PASS] td:last-child,.geo-table tr[data-result="H PASS"] td:last-child{color:#126039;font-weight:700}.geo-table td button{border:0;background:none;color:var(--accent-text);cursor:pointer}#geo-summary,#geo-status{overflow-wrap:anywhere}#geo-status{color:var(--text-muted);min-height:1em}#viewport-container{--geo-panel-height: max(250px, min(390px, 58%))}#viewport-container.georeferencing-open #viewport,#viewport-container.georeferencing-open #measure-overlay,#viewport-container.georeferencing-open #section-overlay{height:calc(100% - var(--geo-panel-height) - 50px)}#viewport-container.georeferencing-open #minimap{bottom:calc(24px + 1.5rem + var(--geo-panel-height));max-height:calc(100% - 24px - 2.25rem - var(--geo-panel-height))}.rail-road-context{position:fixed;z-index:1000;padding:.3rem;border:1px solid #bbc5d1;border-radius:.35rem;background:#f5f7fa;box-shadow:0 4px 16px #0003}.rail-road-context[hidden]{display:none}.rail-road-context button{border:0;padding:.5rem .9rem;background:transparent;color:#152536;cursor:pointer}.rail-road-context button:hover,.rail-road-context button:focus-visible{background:#dbe9f6}#open-menu{position:fixed;z-index:100;padding:.3rem;background:var(--bg-panel);color:var(--text);border:1px solid var(--border-strong);border-radius:5px;box-shadow:0 4px 16px #0003}#open-menu[hidden],#export-settings-panel[hidden]{display:none}#open-menu button{display:block;width:100%;padding:.55rem .7rem;text-align:left;border:0;background:transparent;color:inherit;cursor:pointer}#open-menu button:hover,#open-menu button:focus-visible{background:#dce9f7;color:#1f5b99}#open-menu .open-menu-hint{padding:.55rem .7rem;font-size:.8rem;color:var(--text-dim)}#export-settings-panel{position:absolute;left:.75rem;bottom:calc(24px + 1rem);z-index:10;box-sizing:border-box;width:380px;max-width:calc(100% - 1.5rem);max-height:calc(100% - 4rem);overflow:auto;padding:1rem;background:var(--bg-panel);color:var(--text);border:1px solid var(--border-strong);border-radius:6px;box-shadow:0 4px 16px #0003}#export-settings-panel h2{margin:0 2rem .8rem 0;font-size:1rem}#export-settings-panel label{display:flex;align-items:center;justify-content:space-between;gap:.75rem;margin-top:.7rem;font-size:.82rem}#export-settings-panel label[hidden]{display:none}#export-settings-panel input[type=text]{width:175px;min-width:0}#export-settings-panel input,#export-settings-panel select{font:inherit}#export-settings-panel p{font-size:.76rem;color:var(--text-dim)}