:root{--bg:#f7f8fa;--panel:#ffffff;--panel-muted:#f0f3f5;--text:#172026;--muted:#66737c;--line:#dce2e6;--accent:#0f766e;--accent-dark:#115e59;--danger:#b42318;--warning:#9a6700;--success:#1a7f37}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font-family:Arial,Helvetica,sans-serif}a{color:inherit}button,input,select{font:inherit}button{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:40px;border:0;border-radius:7px;background:var(--accent);color:white;padding:0 14px;cursor:pointer;font-weight:700}button:hover{background:var(--accent-dark)}button:disabled{cursor:not-allowed;opacity:.65}input,select,textarea{width:100%;border:1px solid var(--line);border-radius:7px;background:white;color:var(--text);padding:10px 11px}label{display:grid;gap:7px;color:var(--muted);font-size:13px;font-weight:700}table{width:100%;border-collapse:collapse}td,th{border-bottom:1px solid var(--line);padding:11px 8px;text-align:left;vertical-align:top;font-size:14px}th{color:var(--muted);font-size:12px;text-transform:uppercase}.app-shell{min-height:100vh}.topbar{display:flex;align-items:center;justify-content:space-between;gap:16px;border-bottom:1px solid var(--line);background:white;padding:14px clamp(16px,4vw,36px)}.topbar h1{margin:0;font-size:18px}.topbar nav{display:flex;align-items:center;gap:12px}.topbar a{color:var(--muted);font-weight:700;text-decoration:none}.ghost-button{border:1px solid var(--line);background:white;color:var(--text)}.ghost-button:hover{background:var(--panel-muted)}.content{width:min(1180px,calc(100% - 32px));margin:24px auto 48px}.grid{display:grid;grid-template-columns:minmax(280px,380px) minmax(0,1fr);gap:18px;align-items:start}.panel{border:1px solid var(--line);border-radius:8px;background:var(--panel);padding:18px}.panel h2{margin:0 0 14px;font-size:16px}.stack{display:grid;gap:14px}.alert{border:1px solid #f3b8b0;border-radius:7px;background:#fff3f1;color:var(--danger)}.alert,.notice{padding:10px 12px;font-size:14px}.notice{border:1px solid #b9e1dc;border-radius:7px;background:#edfdfa;color:var(--accent-dark)}.status{display:inline-flex;align-items:center;min-height:24px;border-radius:999px;padding:0 9px;font-size:12px;font-weight:700}.status.ready{background:#eaf7ee;color:var(--success)}.status.processing{background:#fff8db;color:var(--warning)}.status.failed{background:#fff0ee;color:var(--danger)}.login-shell{display:grid;min-height:100vh;place-items:center;padding:24px}.login-panel{width:min(420px,100%);border:1px solid var(--line);border-radius:8px;background:white;padding:28px}.login-panel h1{margin:10px 0 6px}.login-panel p{margin:0 0 18px;color:var(--muted)}.brand-mark{display:inline-grid;width:44px;height:44px;place-items:center;border-radius:8px;background:#dff7f3;color:var(--accent-dark)}.chat-layout{display:grid;grid-template-rows:auto minmax(420px,calc(100vh - 240px)) auto;gap:12px}.chat-actions{display:flex;gap:8px;justify-content:flex-end}.messages{overflow:auto;border:1px solid var(--line);border-radius:8px;background:white;padding:16px}.message{width:min(760px,92%);margin-bottom:12px;border-radius:8px;padding:12px 14px;line-height:1.45}.message.user{margin-left:auto;background:#dff7f3}.message.assistant{background:var(--panel-muted)}.message-content{white-space:pre-wrap}.answering-status{display:flex;align-items:center;gap:9px;color:var(--muted);font-size:13px}.message-content+.answering-status{margin-top:9px}.answering-dots{display:inline-flex;align-items:center;gap:3px}.answering-dots span{width:6px;height:6px;border-radius:50%;background:var(--accent);animation:answering-pulse 1.2s ease-in-out infinite}.answering-dots span:nth-child(2){animation-delay:.15s}.answering-dots span:nth-child(3){animation-delay:.3s}@keyframes answering-pulse{0%,60%,to{opacity:.35;transform:translateY(0)}30%{opacity:1;transform:translateY(-3px)}}.sources{margin-top:8px;color:var(--muted);font-size:12px}.chat-form{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:10px}.muted{color:var(--muted)}@media (max-width:760px){.chat-form,.grid{grid-template-columns:1fr}.topbar{align-items:flex-start;flex-direction:column}.chat-actions{flex-wrap:wrap}}