:root{--bg:#f4f6f8;--card:#fff;--ink:#1f2937;--muted:#6b7280;--brand:#0f766e;--brand-soft:#ccfbf1;--border:#d1d5db}*{box-sizing:border-box}body{margin:0;font-family:Segoe UI,Tahoma,Geneva,Verdana,sans-serif;background:radial-gradient(circle at top right,#d9f99d,transparent 35%),radial-gradient(circle at bottom left,#bfdbfe,transparent 35%),var(--bg);color:var(--ink)}.page{min-height:100vh;padding:24px}.layout{max-width:1100px;margin:0 auto;display:grid;grid-template-columns:1.7fr 1fr;grid-gap:16px;gap:16px}.panel{background:var(--card);border:1px solid var(--border);border-radius:14px;box-shadow:0 10px 24px rgba(17,24,39,.06)}.chat-wrap{display:flex;flex-direction:column;min-height:78vh}.header{padding:16px;border-bottom:1px solid var(--border)}.header h1{margin:0;font-size:1.15rem}.header p{margin:6px 0 0;color:var(--muted);font-size:.92rem}.messages{flex:1 1;padding:16px;overflow-y:auto;display:flex;flex-direction:column;gap:10px}.bubble{max-width:85%;border-radius:12px;padding:10px 12px;line-height:1.4;white-space:pre-wrap}.bubble.user{align-self:flex-end;background:var(--brand);color:#fff}.bubble.assistant{align-self:flex-start;background:#f9fafb;border:1px solid var(--border)}.composer{display:grid;grid-template-columns:1fr auto;grid-gap:8px;gap:8px;border-top:1px solid var(--border);padding:12px}.composer input{border:1px solid var(--border);border-radius:10px;padding:10px;font-size:.95rem}.composer button{border:none;border-radius:10px;background:var(--brand);color:#fff;padding:10px 14px;cursor:pointer}.composer button:disabled{opacity:.6;cursor:not-allowed}.side{padding:14px}.side h2{margin-top:0;font-size:1rem}.kv{border:1px solid var(--border);border-radius:10px;padding:10px;margin-bottom:10px}.label{color:var(--muted);font-size:.82rem}.value{font-weight:600;margin-top:2px}.estimate{background:var(--brand-soft)}.trace{margin:6px 0 0;padding:8px;background:#111827;color:#d1fae5;border-radius:8px;overflow-x:auto;font-size:.75rem}@media (max-width:900px){.layout{grid-template-columns:1fr}}