:root{--bg:#081325;--line:#24324d;--text:#eef4ff;--muted:#92a3c5;--accent:#7c3aed;--accent2:#22d3ee;--surface:#090e1cf0;--card:#ffffff08;--input:#111b35;--nodeBg:#111b35e0;--nodeBorder:#7c3aed59;--itemBg:#ffffff05}body.light{--bg:#fff;--line:#d9dfe8;--text:#1f2937;--muted:#6b7280;--accent:#4f46e5;--accent2:#4f46e5;--surface:#fff;--card:#fff;--input:#fff;--nodeBg:#fff;--nodeBorder:#cbd5e1;--itemBg:#fff}*{box-sizing:border-box}body{background:radial-gradient(circle at top, #162847, var(--bg) 58%);color:var(--text);margin:0;font-family:Inter,system-ui,Arial,sans-serif;overflow:hidden}body.light{background:#fff}.app{grid-template-columns:340px 1fr;height:100vh;display:grid}.app.sidebar-hidden{grid-template-columns:0 1fr}.app.sidebar-hidden .left{display:none}.left{background:var(--surface);border-right:1px solid var(--line);padding:14px;overflow:auto}.main{position:relative}.brand{align-items:center;gap:10px;margin-bottom:10px;display:flex}.dot{background:linear-gradient(135deg, var(--accent), var(--accent2));border-radius:999px;width:12px;height:12px;box-shadow:0 0 18px #7c3aedcc}.card,.group,.topic{background:var(--card);border:1px solid var(--line);border-radius:14px}.card{padding:12px}.group,.topic{margin-top:10px}.head{cursor:pointer;justify-content:space-between;align-items:center;gap:8px;padding:14px;display:flex}.children{padding:0 14px 14px}.item{border:1px solid var(--line);cursor:pointer;background:var(--itemBg);border-radius:10px;margin-top:8px;padding:14px}input,select,textarea,button{border:1px solid var(--line);background:var(--input);width:100%;color:var(--text);border-radius:10px;padding:10px}textarea{resize:vertical;min-height:88px}button{cursor:pointer;background:linear-gradient(135deg, var(--accent), #4f46e5);border:none;font-weight:700}.row{gap:8px;display:flex}.row>*{flex:1}.sp8{height:8px}.hint{color:var(--muted);font-size:12px}.mini-actions{align-items:center;gap:6px;display:flex;position:relative}.kebab{border:1px solid var(--line);width:28px;height:28px;color:var(--text);cursor:pointer;background:#ffffff0f;border-radius:999px;justify-content:center;align-items:center;font-weight:800;display:inline-flex}.menu-pop{border:1px solid var(--line);background:var(--surface);z-index:12;border-radius:10px;min-width:112px;padding:6px;display:none;position:absolute;top:30px;right:0}.mini-actions.open .menu-pop{display:block}.mini-btn{color:#fff;background:#ffffff14;border:1px solid #ffffff1f;border-radius:8px;width:100%;margin-bottom:6px;padding:6px 9px;font-size:12px;line-height:1.2}.mini-btn:last-child{margin-bottom:0}.mini-btn:hover{background:#ffffff24}.danger{color:#fff;background:#ef444424;border-color:#ef444447}.danger:hover{background:#ef444433}body.light .kebab,body.light .menu-pop{background:#fff}body.light .mini-btn{color:#fff;background:linear-gradient(#7c8aa0,#66758d);border:1px solid #0f172a14}body.light .mini-btn:hover{background:linear-gradient(#8796ad,#6e7d96)}body.light 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.toolBtn{color:#111827;background:#fff;border:1px solid #d1d5db}#canvas{pointer-events:none;z-index:1;position:absolute;inset:0}#nodes{z-index:3;position:absolute;inset:0}.brain{z-index:6;cursor:grab;pointer-events:auto;background:#7c3aed2e;border:2px solid #22d3ee99;border-radius:999px;justify-content:center;align-items:center;width:78px;height:78px;display:flex;position:absolute;transform:translate(-50%,-50%);box-shadow:0 0 30px #22d3ee2e}body.light .brain{box-shadow:none;color:#374151;background:#d1d5db;border:2px solid #d1d5db}.node{background:var(--nodeBg);border:1px solid var(--nodeBorder);white-space:nowrap;cursor:grab;border-radius:999px;align-items:center;gap:8px;padding:8px 12px;display:flex;position:absolute;transform:translate(-50%,-50%)}.node-dot{background:#38bdf8;border-radius:999px;width:10px;height:10px;display:inline-block;box-shadow:0 0 10px #0000001f}body.light .node-dot{background:#9ca3af!important}.detail{border:1px solid var(--line);z-index:7;background:#090e1cf5;border-radius:14px;width:min(380px,38vw);max-height:72vh;padding:12px;display:none;position:absolute;top:84px;right:14px;overflow:auto}body.light .detail{color:#111827;background:#f3f4f6;border:1px solid #d1d5db}.tag{background:#7c3aed2e;border-radius:999px;margin:0 6px 6px 0;padding:4px 8px;font-size:12px;display:inline-block}.brain-query-panel{background:var(--surface);border-left:1px solid var(--line);z-index:40;flex-direction:column;width:min(560px,48vw);height:100vh;padding:14px;transition:transform .28s;display:flex;position:fixed;top:0;right:0;transform:translate(102%)}.brain-query-panel.open{transform:translate(0)}.chat-row{margin:10px 0;display:flex}.chat-row.user{justify-content:flex-end}.chat-row.assistant{justify-content:flex-start}.chat-bubble{border:1px solid var(--line);background:#ffffff0a;border-radius:16px;max-width:82%;padding:10px 12px 28px;position:relative}.copy-reply{border:1px solid var(--line);width:auto;color:var(--text);cursor:pointer;background:#ffffff14;border-radius:999px;padding:2px 8px;font-size:11px;position:absolute;bottom:8px;right:10px}.chat-row.user .chat-bubble{background:linear-gradient(#1d4ed8,#1e40af);border-color:#ffffff24}.chat-row.assistant .chat-bubble{background:#ffffff0f;border-color:#6366f138}.role-badge{letter-spacing:.04em;color:#fff;border-radius:999px;margin-bottom:7px;padding:4px 8px;font-size:11px;font-weight:800;display:inline-block}.role-badge.user{background:linear-gradient(#b91c1c,#7f1d1d)}.role-badge.assistant{background:linear-gradient(#8b5cf6,#4f46e5)}.chat-text{white-space:normal;color:#fff;line-height:1.55}.chat-text h2,.chat-text h3,.chat-text h4{margin:8px 0 6px}.chat-text code{background:#ffffff1f;border-radius:6px;padding:2px 6px;font-family:ui-monospace,SFMono-Regular,Menlo,monospace}.chat-text strong{font-weight:800}body.light .brain-query-panel{background:#fff}body.light .chat-row.user .chat-bubble{background:linear-gradient(#1d4ed8,#1e40af)}body.light .chat-row.assistant .chat-bubble{background:#f3f4f6;border-color:#dbe1ea}body.light .chat-text{color:#111827}body.light .chat-row.user .chat-text{color:#fff}.auth{z-index:50;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);background:#030814b8;justify-content:center;align-items:center;display:flex;position:fixed;inset:0}.auth-card{background:var(--surface);border:1px solid var(--line);border-radius:22px;width:min(420px,92vw);padding:22px;box-shadow:0 24px 80px #00000047}.auth-title{margin:0 0 8px;font-size:24px;font-weight:800}.auth-sub{color:var(--muted);margin:0 0 18px;font-size:14px}.auth-actions{gap:10px;margin-top:10px;display:flex}.ghostBtn{border:1px solid var(--line);background:0 0}.auth-msg{color:var(--muted);margin-top:10px;font-size:13px}body.light .auth{background:#f4f6fbd6}body.light .auth-card{box-shadow:0 20px 60px #0f172a1f}