:root{--ink:#17211e;--paper:#f7f5f0;--white:#fff;--sage:#d9e6da;--sage-deep:#4b7057;--clay:#b85e3c;--line:#d8d8d1}*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font-family:Arial,Helvetica,sans-serif}button,input{font:inherit}button{cursor:pointer}.demo-shell{max-width:1440px;min-height:100vh;margin:auto;padding:24px}.topbar{display:flex;justify-content:space-between;align-items:center;gap:16px;padding:4px 0 24px}.eyebrow{color:#65706a;font-size:12px;font-weight:700;letter-spacing:.09em;margin:0 0 4px;text-transform:uppercase}h1{font-size:24px;letter-spacing:.04em;margin:0}.new-conversation{background:var(--ink);border:0;border-radius:8px;color:#fff;font-weight:700;padding:11px 15px}.workspace{display:grid;grid-template-columns:minmax(0,1fr) 360px;grid-gap:20px;gap:20px;align-items:start}.chat-panel,.debug-panel{background:var(--white);border:1px solid var(--line);border-radius:12px;overflow:hidden}.chat-panel{display:grid;grid-template-rows:auto minmax(470px,calc(100vh - 210px)) auto}.chat-header{border-bottom:1px solid var(--line);gap:12px;padding:16px 18px}.avatar,.chat-header{align-items:center;display:flex}.avatar{background:var(--ink);border-radius:50%;color:#fff;font-size:12px;font-weight:700;height:38px;justify-content:center;width:38px}.chat-header span,.chat-header strong{display:block}.chat-header span{color:#69716d;font-size:13px;margin-top:3px}.activity{background:#c6cbc7;border-radius:50%;height:8px;margin-left:auto;width:8px}.activity.active{animation:pulse 1.3s infinite;background:var(--sage-deep)}@keyframes pulse{50%{opacity:.35;transform:scale(1.5)}}.conversation{background:#fbfaf7;overflow-y:auto;padding:20px}.message-row{display:flex;margin:0 0 12px}.message-row.prospect{justify-content:flex-end}.bubble{border-radius:12px;max-width:min(78%,560px);padding:10px 12px 7px}.prospect .bubble{background:var(--ink);border-bottom-right-radius:3px;color:#fff}.blackchina .bubble{background:#fff;border:1px solid #deded7;border-bottom-left-radius:3px}.bubble p{font-size:15px;line-height:1.45;margin:0;white-space:pre-wrap}.bubble time{color:inherit;display:block;font-size:10px;margin-top:5px;opacity:.62;text-align:right}.empty-state{align-items:center;color:#64706a;display:flex;flex-direction:column;justify-content:center;min-height:100%;text-align:center}.empty-state strong{color:var(--ink);margin-bottom:6px}.system-note{color:var(--clay);font-size:12px;text-align:center}.composer{background:#fff;border-top:1px solid var(--line);display:flex;gap:10px;padding:14px}.composer input{border:1px solid #bfc5bf;border-radius:8px;flex:1 1;min-width:0;outline:none;padding:11px 12px}.composer input:focus{border-color:var(--sage-deep);box-shadow:0 0 0 3px rgba(75,112,87,.15)}.composer button{background:var(--sage-deep);border:0;border-radius:8px;color:#fff;font-weight:700;padding:0 16px}.composer button:disabled{cursor:not-allowed;opacity:.45}.debug-toggle{background:var(--sage);border:0;color:var(--ink);display:flex;font-weight:700;justify-content:space-between;padding:15px 16px;text-align:left;width:100%}.debug-content{border-left:4px solid var(--sage-deep);padding:16px}.debug-content section+section{border-top:1px solid var(--line);margin-top:18px;padding-top:18px}h2{font-size:13px;letter-spacing:.03em;margin:0 0 10px}h3{font-size:12px;margin:13px 0 8px}.data-row{margin:7px 0}.data-row span{color:#68716c;display:block;font-size:11px;margin-bottom:2px}code,pre{font-family:ui-monospace,SFMono-Regular,Consolas,monospace;overflow-wrap:anywhere}.data-row code{display:block;font-size:11px;line-height:1.4}.state-field{background:#f6f7f3;border-radius:7px;margin-top:8px;padding:9px}.state-field>strong{font-size:12px}.muted{color:#68716c;font-size:13px;margin:0}.request-log{display:grid;grid-gap:9px;gap:9px}.request-log article{border:1px solid var(--line);border-radius:7px;padding:9px}.request-log article>div{display:flex;justify-content:space-between;gap:8px}.request-log p{font-size:12px;margin:7px 0}.request-log code,.request-log small{display:block;font-size:10px}.request-log small{color:#68716c;margin-top:5px}.status{font-size:10px;letter-spacing:.04em}.status.empty_response{color:#68716c}.status.response_received{color:var(--sage-deep)}.status.http_error,.status.network_error{color:var(--clay)}details{font-size:11px;margin-top:7px}pre{background:#f4f3ef;font-size:10px;max-height:160px;overflow:auto;padding:8px;white-space:pre-wrap}@media (max-width:900px){.workspace{grid-template-columns:1fr}.chat-panel{grid-template-rows:auto minmax(430px,62vh) auto}}@media (max-width:540px){.demo-shell{padding:12px}.topbar{align-items:flex-start;padding-bottom:12px}h1{font-size:20px}.new-conversation{font-size:12px;padding:10px}.conversation{padding:14px}.bubble{max-width:88%}.composer{padding:10px}.composer button{padding:0 12px}}