:root{--bg:#0a1118;--panel:#101b24;--ink:#edf2f3;--muted:#a1b1bd;--line:#293944;--accent:#94c4d2;--amber:#e7b978;--red:#e98272;--side:390px;--head:76px;--foot:128px;color-scheme:dark;font:16px/1.55 -apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}
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#workspace-mode{position:fixed;top:22px;left:390px;z-index:14;display:flex;border:1px solid var(--line);border-radius:3px;overflow:hidden}#workspace-mode button{border:0;padding:6px 14px;font-size:12px}#workspace-mode button[aria-pressed=true]{background:#274350;color:#d6eef4}#floor-picker{display:grid;grid-template-columns:1.6fr 1fr;gap:12px;margin-bottom:24px}#floor-picker label{font-size:11px;letter-spacing:.05em;color:var(--muted)}select{display:block;width:100%;background:#0f202b;color:var(--ink);border:1px solid #3b525f;margin-top:5px;padding:8px;font:14px inherit;border-radius:2px}.floor-views{display:flex;gap:6px;margin:18px 0}.floor-views button{flex:1;font-size:12px;padding:7px 5px}.floor-views button[aria-pressed=true]{border-color:var(--accent);background:#243d4b}.floor-state>span{font-size:11px;letter-spacing:.05em;color:var(--muted)}.floor-state .floor-views{margin:8px 0 18px}.floor-layers{display:flex;flex-wrap:wrap;gap:12px;font-size:12px;color:var(--muted);margin-bottom:22px}.floor-layers label{display:flex;align-items:center;gap:5px}.floor-layers input{accent-color:var(--accent)}.dimension-list{margin:20px 0;border-top:1px solid var(--line)}.dimension-list div{display:flex;justify-content:space-between;align-items:baseline;border-bottom:1px solid var(--line);padding:8px 0;gap:15px}.dimension-list dt{font-size:13px;color:var(--muted)}.dimension-list dd{font:15px ui-monospace,Menlo,monospace;margin:0;color:#d9e7ee}.floor-tag{font:11px ui-monospace,Menlo,monospace;letter-spacing:.06em;color:var(--accent);margin:10px 0 17px}.floor-mode #chapters{display:none}.floor-mode #transport{height:77px}.floor-mode #experience{bottom:77px}.floor-mode .model-tools{display:none}.floor-mode #clock-overlay{display:none}.floor-mode #model-legend{bottom:52px}.floor-mode #previous,.floor-mode #next{display:none}.floor-mode #model-scope{max-width:90%;font-size:10px}.floor-mode .pace-note{max-width:230px}.floor-mode #stage-card .chapter-meta{margin-bottom:20px}.floor-mode #model-legend .legend-damage{background:#7499ad}.floor-mode #model-legend .legend-force{background:#768893}.floor-mode #camera-tools{bottom:96px}.floor-mode #illustrative-label{bottom:90px;max-width:410px}.floor-mode #motion-caption{bottom:56px}
@media(max-width:1100px){#workspace-mode{left:330px}.masthead-right #reference-open{max-width:160px}.floor-mode #model-scope{font-size:9px}}@media(max-width:760px){#workspace-mode{top:var(--head);left:0;right:0;height:36px;border:0;border-bottom:1px solid var(--line);background:var(--bg)}#workspace-mode button{width:50%}#experience{top:calc(var(--head) + 36px)}.floor-mode #experience{top:calc(var(--head) + 36px);bottom:70px}.floor-mode #transport{height:70px}.floor-mode #scene-wrap{height:43%;min-height:200px}.floor-mode #camera-tools{bottom:35px}.floor-mode #illustrative-label{bottom:67px;max-width:none}.floor-mode #model-scope{font-size:8px}.floor-mode .viewport-heading{top:12px}.floor-mode #motion-caption{display:none}}

.damage-key{font-size:.875rem;line-height:1.5;color:#aec4d2;margin:.75rem 0}
#member-inspector{margin:1rem 0;padding:.85rem;border:1px solid #476070;background:#10232f}
#member-id{font-size:.9rem;overflow-wrap:anywhere}
#member-detail{font-size:.875rem;line-height:1.5;margin:.5rem 0 0}
#download-mapping{font-size:.875rem;padding:.5rem .75rem}

#open-sag-study{width:100%;padding:10px 14px;margin:0 0 6px;text-align:left;color:var(--accent);border-color:#567885}#sag-controls{margin:22px 0 28px;padding:16px;border:1px solid #476070;background:#10232f}#sag-controls .eyebrow{margin-bottom:12px}.sag-states{display:flex;gap:6px;margin-bottom:10px}.sag-states button{flex:1;padding:8px 5px}.sag-states button[aria-pressed=true],#sag-reference[aria-pressed=true]{background:#94c4d2;color:#0b1820;border-color:var(--accent)}#sag-reference{width:100%;padding:8px;font-size:12px}#sag-readout{font-size:13px;line-height:1.55;margin:14px 0 8px}.sag-source-note,#sag-controls a{font-size:12px;color:var(--muted)}.sag-mode #damage-state,.sag-mode .damage-key,.sag-mode #damage-status,.sag-mode #download-mapping,.sag-mode #floor-picker,.sag-mode #open-sag-study{display:none}.sag-mode #stage-card h1{font-size:32px}.sag-mode #stage-card-content details p{font-size:13px;line-height:1.55}.sag-mode .floor-views{flex-wrap:wrap}.sag-mode .floor-views button{min-width:70px}

.sag-floor-label{display:grid;gap:6px;font-size:13px;margin-bottom:12px}.sag-floor-label select{width:100%;padding:9px;background:#10232f;color:var(--ink);border:1px solid #567885}#sag-compare{width:100%;padding:9px;margin-bottom:14px}#sag-compare[aria-pressed=true]{background:#94c4d2;color:#0b1820}.sag-mode .sag-states[hidden]{display:none}.sag-mode button:disabled{opacity:.45;cursor:default}.sag-times-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:7px;font-size:13px;padding-left:0;list-style:none}

/* Tower initiation: source-constrained motion on the existing structural model. */
#open-north-sequence{display:block;width:100%;margin:0 0 8px;border-color:#589ba6;color:#b9f0f1;background:#173039;padding:10px;text-align:left}
#north-controls{margin:16px 0;font-size:12px;line-height:1.55}
#north-controls[hidden]{display:none}
.sequence-tower-label{display:block;font-size:12px;color:var(--muted);margin-bottom:16px}
#north-controls details[hidden]{display:none}
.north-phases{display:flex;flex-wrap:wrap;gap:5px;margin-bottom:12px}
.north-phases button{padding:7px 9px;font-size:11px}
.north-phases button[aria-pressed=true]{background:#255363;border-color:#80cbd3;color:#fff}
.north-actions{display:flex;gap:7px;margin-bottom:14px}.north-actions button{padding:8px}
#north-replay{background:#183e4b;border-color:#79c4ce;color:#d8f8f9}
.north-metrics{display:grid;grid-template-columns:1fr 1fr;gap:12px;padding:13px 0;border-block:1px solid #2b3d48}
.north-metrics div:last-child{grid-column:1/-1}.north-metrics strong{display:block;color:#c9edf0;font-size:22px;font-weight:500}.north-metrics span{font-size:11px;color:#99aebd}
#north-phase-note{min-height:4em;color:#c8d9e3}
#north-controls details{margin-top:14px;color:#9db2c0}#north-controls summary{cursor:pointer;color:#c3dfe7}
.north-mode #floor-picker,.north-mode #damage-state,.north-mode .damage-key,.north-mode #damage-status,.north-mode #download-mapping,.north-mode #floor-inspector .floor-views,.north-mode #detail-member-wrap,.north-mode #open-north-sequence{display:none!important}
.north-mode #stage-card-content h1{font-size:27px}.north-mode #stage-card-content p{font-size:12px;line-height:1.6}
.north-mode #clock-time{font-size:17px}.north-mode #illustrative-label{max-width:440px}


.north-presentations{display:flex;gap:6px;margin-bottom:10px}.north-presentations button{flex:1;padding:8px;font-size:12px}.north-presentations button[aria-pressed=true]{background:#245264;color:#e6f9fa;border-color:#80cbd3}#north-status{color:#a1e0df}#north-status.assumed{color:#e6bd7b}.north-mode .evidence img{object-fit:contain;height:auto;max-height:290px}

#bathtub-scope{font:14px/1.4 system-ui}

#detail-tiebacks-control{display:block;padding:12px;border:1px solid var(--line);color:var(--accent);font-size:14px;line-height:1.5;margin:16px 0}#detail-tiebacks-control input{accent-color:var(--accent)}#detail-tiebacks-control small{display:block;margin-top:5px;color:var(--muted);font-size:14px}