:root{--bg:#eef1f6;--panel:#fff;--line:#e2e6ee;--text:#1c2333;--muted:#7b869c;--brand:#0068ff;--brand-dark:#0052cc;--in:#fff;--out:#d7e8ff;--danger:#e5484d;--ok:#18a058;--sidebar:#f7f9fc}*{box-sizing:border-box}body,html{margin:0;padding:0;height:100%;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;background:var(--bg);color:var(--text)}button{cursor:pointer}button,input,textarea{font-family:inherit}.login-wrap{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:24px}.login-card{width:100%;max-width:400px;background:var(--panel);border-radius:16px;padding:28px;box-shadow:0 12px 40px rgba(20,30,60,.12)}.login-card h1{font-size:20px;margin:0 0 4px}.login-card p.sub{color:var(--muted);font-size:13px;margin:0 0 20px}.field{margin-bottom:14px}.field label{display:block;font-size:12px;font-weight:600;color:var(--muted);margin-bottom:6px}.field input{width:100%;padding:11px 12px;border:1px solid var(--line);border-radius:10px;font-size:14px;outline:none}.field input:focus{border-color:var(--brand)}.btn{border:none;border-radius:10px;padding:11px 16px;font-size:14px;font-weight:600;background:var(--brand);color:#fff;width:100%}.btn:hover{background:var(--brand-dark)}.btn:disabled{opacity:.6;cursor:default}.err{color:var(--danger);font-size:13px;margin-top:12px}.adv{margin-bottom:14px}.adv summary{cursor:pointer;font-size:12px;color:var(--muted);font-weight:600;-webkit-user-select:none;-moz-user-select:none;user-select:none}.adv summary:hover{color:var(--brand)}.app{display:flex;height:100vh;overflow:hidden}.sidebar{width:330px;min-width:260px;background:var(--sidebar);border-right:1px solid var(--line);display:flex;flex-direction:column}.sidebar-head{padding:14px;border-bottom:1px solid var(--line);display:flex;align-items:center;gap:10px}.sidebar-head .title{font-weight:700;font-size:15px;flex:1 1}.status-dot{width:9px;height:9px;border-radius:50%;background:var(--muted);flex:none}.status-dot.on{background:var(--ok)}.status-dot.off{background:var(--danger)}.icon-btn{border:none;background:transparent;color:var(--muted);font-size:18px;padding:4px 6px;border-radius:8px}.icon-btn:hover{background:#eaeef5}.search{padding:10px 14px}.search input{width:100%;padding:9px 12px;border-radius:9px;border:1px solid var(--line);font-size:13px;outline:none}.thread-list{flex:1 1;overflow-y:auto}.tabs{display:flex;gap:6px;padding:0 14px 10px}.tab{flex:1 1;border:1px solid var(--line);background:#fff;border-radius:8px;padding:6px 4px;font-size:12px;font-weight:600;color:var(--muted)}.tab.on{background:var(--brand);border-color:var(--brand);color:#fff}.thread{padding:12px 14px;border-bottom:1px solid #eef1f6;cursor:pointer;display:flex;flex-direction:column;gap:3px}.thread:hover{background:#eef3fb}.thread.active{background:#e4edff}.thread-top{display:flex;align-items:center;gap:6px}.thread-name{font-weight:600;font-size:14px;flex:1 1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.thread-time{font-size:11px;color:var(--muted);flex:none}.thread-last{font-size:12.5px;color:var(--muted);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.badge{background:var(--danger);color:#fff;font-size:10.5px;min-width:18px;height:18px;border-radius:9px;padding:0 5px;display:inline-flex;align-items:center;justify-content:center;flex:none}.tag-ai{font-size:10px;padding:1px 6px;border-radius:6px;flex:none;font-weight:600}.tag-ai.on{background:#e6f6ec;color:var(--ok)}.tag-ai.off{background:#ffeaea;color:var(--danger)}.chat{flex:1 1;display:flex;flex-direction:column;min-width:0;background:var(--panel)}.chat-head{padding:12px 18px;border-bottom:1px solid var(--line);display:flex;align-items:center;gap:12px}.chat-head .name{font-weight:700;font-size:15px}.chat-head .spacer{flex:1 1}.toggle-ai{border:1px solid var(--line);background:#fff;border-radius:9px;padding:7px 12px;font-size:12.5px;font-weight:600;color:var(--text)}.toggle-ai.paused{background:#fff4e5;border-color:#f5c98b;color:#a15c00}.messages{flex:1 1;overflow-y:auto;padding:18px;flex-direction:column;gap:10px;background:#f2f5fa}.bubble-row,.messages{display:flex}.bubble-row.out{justify-content:flex-end}.bubble{max-width:70%;padding:9px 13px;border-radius:14px;font-size:14px;line-height:1.4;white-space:pre-wrap;word-break:break-word;box-shadow:0 1px 2px rgba(0,0,0,.05)}.bubble.in{background:var(--in);border-bottom-left-radius:4px}.bubble.out{background:var(--out);border-bottom-right-radius:4px}.bubble .meta{font-size:10.5px;color:var(--muted);margin-top:4px;text-align:right}.composer{padding:12px 16px;border-top:1px solid var(--line);display:flex;gap:10px;align-items:flex-end;background:#fff}.composer textarea{flex:1 1;resize:none;border:1px solid var(--line);border-radius:12px;padding:10px 12px;font-size:14px;outline:none;max-height:140px;min-height:44px}.composer textarea:focus{border-color:var(--brand)}.composer .send{border:none;background:var(--brand);color:#fff;border-radius:12px;padding:0 20px;height:44px;font-weight:600;font-size:14px}.composer .send:hover{background:var(--brand-dark)}.empty{flex:1 1;display:flex;align-items:center;justify-content:center;color:var(--muted);font-size:14px;text-align:center;padding:24px}.notice{background:#fff8e6;color:#8a6100;font-size:12px;padding:7px 18px;border-bottom:1px solid #f2e2b8}.mobile-only{display:none}@media (max-width:720px){.sidebar{width:100%;position:absolute;z-index:5;height:100%}.sidebar.hide{display:none}.chat{width:100%}.mobile-only{display:inline-block}}