:root{--teal:#0d7d6c;--teal-dark:#0a5f53;--teal-light:#e3f2ee;--teal-pale:#f0faf7;--ink:#23272a;--ink-soft:#5b6367;--ink-faint:#9aa3a7;--bg:#f6f3ee;--card:#fff;--bubble-in:#fff;--bubble-out:#d7f0e8;--hairline:#e7e2d9;--amber:#b7791f;--amber-bg:#fdf3e0;--red:#c0392b;--red-bg:#fbeae7;--green:#1e8e5a;--green-bg:#e6f4ec;--gray:#8a9296;--gray-bg:#eef0f1;--radius:14px;--nav-h:64px;--shadow:0 8px 28px #14282424}*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}html,body{height:100%}body{color:var(--ink);overscroll-behavior-y:none;background:#e9e4da;margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif}#root{justify-content:center;min-height:100dvh;display:flex}.app-frame{background:var(--bg);flex-direction:column;width:100%;max-width:480px;min-height:100dvh;display:flex;position:relative;box-shadow:0 0 40px #1428241f}.hdr{z-index:30;background:var(--teal);color:#fff;padding:calc(10px + env(safe-area-inset-top)) 14px 10px;align-items:center;gap:10px;display:flex;position:sticky;top:0}.hdr .ttl{letter-spacing:.2px;flex:1;min-width:0;font-size:19px;font-weight:700}.hdr .sub{opacity:.85;white-space:nowrap;text-overflow:ellipsis;font-size:12px;overflow:hidden}.hdr button.iconbtn{color:#fff;cursor:pointer;background:0 0;border:0;border-radius:10px;padding:6px;font-size:22px}.hdr .brand{align-items:center;gap:9px;display:flex}.hdr .brand img{border-radius:8px;width:32px;height:32px}.chat-hdr{z-index:30;background:var(--teal-dark);color:#fff;padding:calc(8px + env(safe-area-inset-top)) 8px 8px;align-items:center;gap:4px;display:flex;position:sticky;top:0}.chat-hdr .who{text-align:left;color:#fff;cursor:pointer;background:0 0;border:0;border-radius:10px;flex:1;align-items:center;gap:10px;min-width:0;padding:4px;display:flex}.chat-hdr .nm{white-space:nowrap;text-overflow:ellipsis;font-size:16.5px;font-weight:700;overflow:hidden}.chat-hdr 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8px;font-size:15px;line-height:1.55}.steps{gap:6px;margin:18px 0 4px;display:flex}.steps i{background:var(--hairline);border-radius:2px;flex:1;height:4px}.steps i.on{background:var(--teal)}.demobox{border:2px dashed var(--amber);text-align:center;background:#fff8e6;border-radius:12px;margin:14px 0;padding:14px}.demobox .code{letter-spacing:6px;color:var(--teal-dark);margin-top:6px;font-size:30px;font-weight:800}