:root{font-family:ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,"Apple Color Emoji","Segoe UI Emoji";line-height:1.5;font-weight:400;color:#111827;background-color:#f7f7f8;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}body{margin:0;min-width:320px;min-height:100vh;background:#f7f7f8;color:#111827}#root{min-height:100vh}*{box-sizing:border-box}button,textarea,input{font:inherit}button{color:inherit}.page{min-height:100vh;display:flex;justify-content:center;padding:24px}.chatShell{width:min(980px,100%);min-height:calc(100vh - 48px);display:flex;flex-direction:column}.messages{flex:1;overflow:auto;padding:28px 0 150px}.emptyState{min-height:calc(100vh - 260px);display:flex;align-items:center;justify-content:center}.emptyTitle{margin:0;font-size:32px;font-weight:600;color:#0f172a;letter-spacing:-.02em}.messageList{display:flex;flex-direction:column;gap:18px;padding:0 16px}.row{display:flex;flex-direction:column;gap:6px;max-width:100%}.rowUser{align-items:flex-end}.rowAssistant{align-items:flex-start}.bubble{max-width:min(760px,100%);padding:12px 14px;border-radius:16px;font-size:16px;line-height:1.55;white-space:pre-wrap;word-break:break-word}.bubbleUser{background:#e5e7eb;color:#0b1220;border-top-right-radius:6px}.bubbleAssistant{background:#fff;border:1px solid #e5e7eb;color:#0b1220;border-top-left-radius:6px}.messageActions{display:inline-flex;gap:8px;align-items:center;padding-left:6px;color:#6b7280}.iconButton{display:inline-flex;align-items:center;justify-content:center;padding:6px;border-radius:10px;border:1px solid transparent;background:transparent;cursor:pointer}.iconButton:hover{background:#0f172a0a;border-color:#0f172a14}.composerWrap{position:sticky;bottom:0;padding:18px 0 10px;background:linear-gradient(to bottom,#f7f7f800,#f7f7f8e6 30%,#f7f7f8)}.composer{width:min(900px,100%);margin:0 auto;border-radius:18px;background:#fff;border:1px solid #d1d5db;box-shadow:0 16px 40px #0f172a14;padding:12px}.composerTop{display:flex;gap:10px;align-items:flex-end}.composerInput{flex:1;resize:none;border:none;outline:none;padding:10px 0;min-height:40px;max-height:160px;background:transparent;color:#0b1220}.circleButton{width:40px;height:40px;border-radius:999px;border:1px solid #e5e7eb;background:#fff;cursor:pointer;display:inline-flex;align-items:center;justify-content:center}.circleButton:hover{background:#f3f4f6}.sendButton{width:40px;height:40px;border-radius:999px;border:1px solid #111827;background:#111827;color:#fff;cursor:pointer;display:inline-flex;align-items:center;justify-content:center}.sendButton:disabled{opacity:.4;cursor:not-allowed}.composerTools{display:flex;gap:10px;align-items:center;flex-wrap:wrap;margin-top:10px}.toolButton{display:inline-flex;align-items:center;gap:6px;padding:6px 8px;border-radius:12px;border:1px solid transparent;background:transparent;cursor:pointer;color:#374151}.toolButton:hover{background:#f3f4f6;border-color:#e5e7eb}.bubbleTyping{display:inline-flex;align-items:center;gap:6px;width:72px}.dot{width:6px;height:6px;border-radius:999px;background:#9ca3af;animation:pulse 1.2s infinite ease-in-out}.dot:nth-child(2){animation-delay:.18s}.dot:nth-child(3){animation-delay:.36s}@keyframes pulse{0%,80%,to{opacity:.3;transform:translateY(0)}40%{opacity:1;transform:translateY(-2px)}}@media (max-width: 520px){.page{padding:12px}.messageList{padding:0 8px}}