:root{--bg: #f3f5f7;--panel: #ffffff;--border: #d8dee6;--text: #1a2332;--muted: #5c6b7a;--accent: #0f6e56;--accent-soft: #e6f4ef;--user-bubble: #0f6e56;--assistant-bubble: #eef1f5;--danger: #b42318;--shadow: 0 1px 2px rgba(16, 24, 40, .06);font-family:Segoe UI,PingFang SC,Microsoft YaHei,sans-serif;color:var(--text);background:var(--bg);line-height:1.5}*{box-sizing:border-box}html,body,#root{height:100%;margin:0}button,input,select,textarea{font:inherit}button{cursor:pointer}.app-shell{display:flex;flex-direction:column;height:100%;min-height:0}.app-header{display:flex;align-items:center;gap:12px;padding:10px 16px;background:#f7f4ef;border-bottom:1px solid var(--border);flex-shrink:0}.app-header-brand{display:inline-flex;align-items:center;gap:8px}.app-header-dot{width:10px;height:10px;border-radius:50%;background:#2c2c2c;display:inline-block}.app-header-title{font-size:.95rem;font-weight:600;color:var(--text)}.sidebar-toggle{display:inline-flex;align-items:center;justify-content:center;width:32px;height:32px;padding:0;border:1px solid transparent;border-radius:8px;background:transparent;color:var(--text)}.sidebar-toggle:hover{background:#0000000f}.sidebar-toggle.is-active{background:var(--accent-soft);border-color:var(--border);color:var(--accent)}.app-header-spacer{flex:1}.login-bar{display:inline-flex;align-items:center;gap:8px;margin-left:auto;flex-wrap:wrap}.login-input{width:110px;height:28px;padding:0 8px;border:1px solid var(--border);border-radius:6px;background:#fff;font-size:.8rem}.login-err{color:#b42318;font-size:.75rem;max-width:220px}.app{display:grid;grid-template-columns:240px 1fr 280px;flex:1;min-height:0}.app.sidebar-collapsed{grid-template-columns:1fr 280px}.panel{background:var(--panel);border-right:1px solid var(--border);min-height:0;display:flex;flex-direction:column}.panel:last-child{border-right:none;border-left:1px solid var(--border)}.panel-header{padding:14px 16px;border-bottom:1px solid var(--border);font-weight:600;display:flex;align-items:center;justify-content:space-between;gap:8px}.panel-body{flex:1;overflow:auto;padding:12px;min-height:0}.main{display:flex;flex-direction:column;min-width:0;min-height:0}.topbar{display:flex;flex-wrap:wrap;gap:10px;align-items:center;padding:12px 16px;border-bottom:1px solid var(--border);background:var(--panel)}.topbar label{display:inline-flex;align-items:center;gap:6px;color:var(--muted);font-size:.9rem}.topbar select,.topbar input[type=text]{border:1px solid var(--border);border-radius:6px;padding:4px 8px;background:#fff}.health{margin-left:auto;font-size:.85rem;color:var(--muted)}.health.ok{color:var(--accent)}.health.bad{color:var(--danger)}.messages{flex:1;overflow:auto;padding:16px;display:flex;flex-direction:column;gap:12px;min-height:0}.msg{max-width:min(720px,92%);padding:10px 14px;border-radius:12px;white-space:pre-wrap;word-break:break-word;box-shadow:var(--shadow)}.msg.user{align-self:flex-end;background:var(--user-bubble);color:#fff}.msg.assistant{align-self:flex-start;background:var(--assistant-bubble);color:var(--text)}.msg.system{align-self:center;background:transparent;color:var(--muted);box-shadow:none;font-size:.9rem}.msg .role{display:block;font-size:.75rem;opacity:.75;margin-bottom:4px}.typing-dots{display:inline-flex;gap:4px;align-items:center;padding:4px 0}.typing-dots span{display:block;width:6px;height:6px;border-radius:50%;background:var(--muted);animation:typing-bounce 1.2s infinite ease-in-out}.typing-dots span:nth-child(2){animation-delay:.15s}.typing-dots span:nth-child(3){animation-delay:.3s}@keyframes typing-bounce{0%,60%,to{transform:translateY(0);opacity:.35}30%{transform:translateY(-4px);opacity:1}}.composer{border-top:1px solid var(--border);background:var(--panel);padding:12px 16px;display:flex;gap:8px}.composer textarea{flex:1;resize:none;min-height:64px;max-height:160px;border:1px solid var(--border);border-radius:8px;padding:10px 12px}.composer-actions{display:flex;flex-direction:column;gap:6px}.btn{border:1px solid var(--border);background:#fff;border-radius:8px;padding:8px 12px;color:var(--text)}.btn:hover:not(:disabled){background:#f7f9fb}.btn:disabled{opacity:.55;cursor:not-allowed}.btn.primary{background:var(--accent);border-color:var(--accent);color:#fff}.btn.primary:hover:not(:disabled){filter:brightness(1.05)}.btn.danger{color:var(--danger);border-color:#f0c4c0}.session-item{display:flex;gap:6px;align-items:center;margin-bottom:6px}.session-item button.pick{flex:1;text-align:left;border:1px solid transparent;background:transparent;border-radius:6px;padding:8px 10px;color:var(--text);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.session-item button.pick:hover{background:var(--accent-soft)}.session-item button.pick.active{background:var(--accent-soft);border-color:#b7ddd0;font-weight:600}.muted{color:var(--muted);font-size:.9rem}.error-banner{margin:0 16px 8px;padding:8px 12px;border-radius:8px;background:#fef3f2;color:var(--danger);border:1px solid #f0c4c0;font-size:.9rem}.kb-form{display:flex;flex-direction:column;gap:8px}.kb-form input{border:1px solid var(--border);border-radius:6px;padding:8px 10px}.kb-result,.kb-stats{margin-top:12px;padding:10px;background:#f7f9fb;border-radius:8px;border:1px solid var(--border);font-size:.9rem;white-space:pre-wrap;word-break:break-word}.side-stack{display:flex;flex-direction:column;min-height:0;border-left:1px solid var(--border);background:var(--panel)}.side-stack .panel{border-right:none;border-left:none}.side-stack .settings-panel{flex:0 0 auto;max-height:48%;border-bottom:1px solid var(--border)}.side-stack .panel:last-child{flex:1;min-height:0;border-left:none;border-top:none}.settings-hint{margin:0 0 10px;font-size:.85rem;line-height:1.4}.settings-form{display:flex;flex-direction:column;gap:8px}.settings-form input{border:1px solid var(--border);border-radius:6px;padding:8px 10px;width:100%}.settings-actions{display:flex;gap:8px;margin-top:4px}.settings-saved{margin-top:4px;font-size:.85rem}.empty{margin:auto;color:var(--muted);text-align:center;padding:24px}.file-toolbar{border-top:1px solid var(--border);padding:8px 12px;display:flex;flex-direction:column;gap:8px;background:#00000026}.file-toolbar-actions{display:flex;flex-wrap:wrap;gap:6px;align-items:center}.file-toolbar-error{color:#f87171;font-size:12px}.file-chips{display:flex;flex-wrap:wrap;gap:6px}.file-chip{display:inline-flex;align-items:center;gap:4px;max-width:240px;padding:2px 8px;border-radius:999px;font-size:12px;background:#ffffff14;border:1px solid rgba(255,255,255,.12)}.file-chip-name{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.file-chip-x{border:none;background:transparent;color:inherit;cursor:pointer;padding:0 2px;line-height:1}.file-tree-panel{max-height:180px;overflow:auto;border:1px solid rgba(255,255,255,.1);border-radius:6px;padding:4px 0}.file-tree-item{display:block;width:100%;text-align:left;border:none;background:transparent;color:inherit;font:inherit;font-size:13px;padding:3px 8px;cursor:pointer}.file-tree-item:hover{background:#ffffff0f}.file-tree-item.file{opacity:.95}@media (max-width: 960px){.app{grid-template-columns:1fr;grid-template-rows:auto 1fr auto}.panel{border-right:none;border-bottom:1px solid var(--border);max-height:220px}.side-stack{border-left:none;border-top:1px solid var(--border);max-height:360px}.side-stack .panel:last-child{border-left:none;border-top:1px solid var(--border);max-height:none}}.icp-footer{flex-shrink:0;text-align:center;padding:8px 12px;font-size:12px;line-height:1.4;color:#8a8680;background:#f7f4ef;border-top:1px solid var(--border)}.icp-footer a{color:inherit;text-decoration:none}.icp-footer a:hover{text-decoration:underline}.login-page{height:100%;min-height:100%;display:flex;flex-direction:column;background:#f7f4ef}.icp-footer-text{margin-right:10px}.login-page-main{flex:1;display:flex;align-items:center;justify-content:center;padding:24px;min-height:0}.login-page .icp-footer{width:100%}.login-card{width:100%;max-width:360px;display:flex;flex-direction:column;gap:8px;padding:28px 24px;background:#fff;border:1px solid var(--border);border-radius:12px;box-shadow:0 8px 24px #0000000f}.login-card-brand{display:flex;align-items:center;gap:8px}.login-card-title{margin:0;font-size:1.1rem;font-weight:600}.login-card-hint{margin:0 0 8px;font-size:.85rem}.login-page-input{height:36px;padding:0 10px;border:1px solid var(--border);border-radius:8px;font-size:.9rem}.login-page-err{margin-top:4px}.login-page-btn{margin-top:12px;height:36px}