:root{--bg:#FCFCFD;--surface:#FFFFFF;--surface-2:#F7F7F8;--border:#E4E4E7;--border-strong:#D4D4D8;--text:#18181B;--text-2:#52525B;--text-3:#A1A1AA;--accent:#5B5BD6;--accent-bg:#EEEEFB;--ok:#16A34A;--ok-bg:#EAF7EF;--warn:#D97706;--warn-bg:#FDF3E3;--risk:#DC2626;--risk-bg:#FCEBEB;--info:#2563EB;--info-bg:#EAF1FE;--ok-text:#15803D;--warn-text:#B45309;--risk-bg-2:#F6D5D5;--g:var(--ok-text);--y:var(--warn-text);--r:var(--risk);--n:var(--text-3);--blue:var(--accent);--navy:var(--text);--ink:var(--text);--sub:var(--text-2);--faint:var(--text-2);--line:var(--border);--line2:var(--border);--panel:var(--surface);--mono:"Inter",-apple-system,"Segoe UI",system-ui,sans-serif;--radius:8px;--shadow:none;--shadow-modal:0 8px 24px rgba(0,0,0,0.08);--ease:150ms ease-out}[data-theme=dark]{--bg:#0F0F12;--surface:#17171B;--surface-2:#1E1E23;--border:#2A2A31;--border-strong:#3A3A42;--text:#EDEDEF;--text-2:#A5A5AE;--text-3:#6B6B74;--accent:#8B8BF5;--accent-bg:#232345;--ok:#4ADE80;--ok-text:#4ADE80;--ok-bg:#12291C;--warn:#FBBF24;--warn-text:#FBBF24;--warn-bg:#2C2312;--risk:#F87171;--risk-text:#F87171;--risk-bg:#2E1616;--info:#60A5FA;--info-text:#60A5FA;--info-bg:#14213A;--risk-bg-2:#3A1D1D;--shadow-modal:0 8px 24px rgba(0,0,0,0.5)}*{box-sizing:border-box}body,html{height:100%}body{margin:0;background:var(--bg);color:var(--text);font-family:var(--mono);font-size:15px;line-height:1.5;font-feature-settings:"tnum";font-variant-numeric:tabular-nums;-webkit-font-smoothing:antialiased}a{color:var(--accent)}button,input,textarea{font-family:inherit;font-size:inherit}.btn{padding:9px 14px;border:1px solid var(--border);border-radius:6px;background:var(--surface);color:var(--text);cursor:pointer;transition:background var(--ease),border-color var(--ease)}.btn:hover:not(:disabled){border-color:var(--border-strong)}.btn:disabled{color:var(--text-3);cursor:not-allowed}.btn:focus-visible{outline:2px solid var(--accent);outline-offset:2px}.btn-primary{background:var(--accent);border-color:var(--accent);color:var(--surface);font-weight:600}.btn-primary:hover:not(:disabled){filter:brightness(1.06)}.btn-primary:disabled{background:var(--surface-2);border-color:var(--border)}.btn-ghost{background:transparent;color:var(--text-2)}.btn-ghost:hover:not(:disabled){background:var(--surface-2)}.input,.textarea{width:100%;padding:10px 12px;background:var(--bg);color:var(--text);border:1px solid var(--border-strong);border-radius:6px;outline:none}.input:focus,.textarea:focus{border-color:var(--accent)}.textarea{resize:none;line-height:1.5;max-height:200px;overflow-y:auto}.textarea:disabled{background:var(--surface-2);color:var(--text-3)}.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius)}.chat-layout{display:grid;grid-template-columns:264px 1fr;height:100vh;height:100dvh}.chat-sidebar{display:flex;flex-direction:column;gap:12px;min-height:0;padding:16px 12px;background:var(--surface);border-right:1px solid var(--border);overflow-y:auto}.chat-sidebar .btn{display:block;flex:none;text-align:center;text-decoration:none}.conv-list{display:flex;flex-direction:column;gap:2px;margin:0;padding:0;list-style:none;min-height:0}.conv-item{display:block;padding:8px 10px;border-radius:6px;color:var(--text-2);font-size:14px;text-decoration:none;overflow:hidden;white-space:nowrap;text-overflow:ellipsis}.conv-item:hover{background:var(--surface-2)}.conv-item[aria-current=page]{background:var(--accent-bg);color:var(--text);font-weight:600}.chat-main{display:flex;flex-direction:column;min-height:0;min-width:0}.chat-topbar{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:12px 20px;background:var(--surface);border-bottom:1px solid var(--border)}.msg-list{flex:1 1;min-height:0;overflow-y:auto;padding:24px 20px;display:flex;flex-direction:column;gap:18px}.msg-assistant,.msg-user{display:flex;max-width:760px;width:100%;margin:0 auto}.msg-user{justify-content:flex-end}.msg-body{white-space:pre-wrap;overflow-wrap:anywhere;max-width:100%}.msg-user .msg-body{padding:10px 14px;background:var(--accent-bg);border-radius:var(--radius);max-width:85%}.msg-assistant .msg-body{color:var(--text)}.msg-sources{margin:12px 0 0;padding:10px 12px;background:var(--surface-2);border:1px solid var(--border);border-radius:var(--radius);color:var(--text-2);font-size:13px;white-space:normal;list-style:none}.msg-sources li{margin:2px 0}.typing{display:inline-flex;gap:4px;align-items:center;height:22px}.typing span{width:6px;height:6px;border-radius:50%;background:var(--text-3);animation:typing-bounce 1.2s ease-in-out infinite}.typing span:nth-child(2){animation-delay:.15s}.typing span:nth-child(3){animation-delay:.3s}@keyframes typing-bounce{0%,60%,to{opacity:.35;transform:translateY(0)}30%{opacity:1;transform:translateY(-3px)}}@media (prefers-reduced-motion:reduce){.typing span{animation:none;opacity:.6}}.composer{padding:12px 20px 16px;background:var(--surface);border-top:1px solid var(--border)}.composer>*{max-width:760px;margin-left:auto;margin-right:auto}.composer-row{display:flex;align-items:flex-end;gap:8px}.disclaimer{margin:0 0 8px;color:var(--text-3);font-size:12px;text-align:center}.chat-error{display:flex;align-items:center;justify-content:space-between;gap:12px;margin:0 0 10px;padding:9px 12px;background:var(--risk-bg);border:1px solid var(--risk);border-radius:var(--radius);color:var(--risk);font-size:13px}@media (max-width:860px){.chat-layout{grid-template-columns:1fr;grid-template-rows:auto 1fr}.chat-sidebar{flex-direction:row;align-items:center;gap:8px;padding:10px 12px;border-right:none;border-bottom:1px solid var(--border);overflow-x:auto;overflow-y:hidden}.conv-list{flex-direction:row;gap:6px}.conv-item{border:1px solid var(--border);border-radius:999px;max-width:180px;flex:none}.msg-list{padding:16px 14px}.composer{padding:10px 14px 14px}}