/* A7 — Extended-thinking cost section */
#extThinking{margin-top:8px}
#extThinking .ext-head{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:8px;margin-bottom:8px}
#extThinking .ext-head h2{margin:0}
#extThinking .ext-tabs{display:flex;gap:4px;flex-wrap:wrap}
#extThinking .ext-tab{padding:4px 10px;border-radius:8px;cursor:pointer;background:var(--panel2);border:1px solid var(--border);font-size:12px;color:var(--muted)}
#extThinking .ext-tab.active{background:var(--accent);border-color:var(--accent);color:#fff}
#extThinking .ext-summary{display:flex;gap:18px;flex-wrap:wrap;margin-top:10px;font-size:12px;color:var(--muted)}
#extThinking .ext-summary b{color:var(--text);font-variant-numeric:tabular-nums}
#extThinking .ext-empty{padding:24px;color:var(--muted);text-align:center;font-size:13px}
#extThinking canvas{max-height:300px}