:root{font-family:Inter,system-ui,Arial,sans-serif;color:#1e1e2e}body{margin:0;background:#f7f7fb}.layout{max-width:1100px;margin:0 auto;padding:24px}.grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}.card{background:#fff;border-radius:12px;padding:16px;box-shadow:0 2px 10px #0000000f}.row{display:flex;gap:8px;align-items:center;margin-bottom:10px;flex-wrap:wrap}.chatbox{min-height:240px;max-height:360px;overflow:auto;border:1px solid #ececf2;border-radius:10px;padding:10px;background:#fafafe}.msg{margin-bottom:8px}.msg.user{color:#223}.msg.assistant{color:#0b5}input,select,button{padding:8px 10px;border-radius:8px;border:1px solid #d4d7e3}button{background:#4f46e5;color:#fff;border:none;cursor:pointer}.muted{color:#666;font-size:13px}@media (max-width: 900px){.grid{grid-template-columns:1fr}}