*{box-sizing:border-box}body{margin:0;font-family:-apple-system,PingFang SC,Segoe UI,sans-serif;background:#f6f5f2;color:#1f1f1f}.app{max-width:720px;margin:0 auto;height:100vh;display:flex;flex-direction:column}.header{padding:20px 16px 12px;border-bottom:1px solid #e4e2dc}.header h1{margin:0;font-size:20px;font-weight:600}.subtitle{margin:4px 0 0;font-size:13px;color:#8a877f}.chat{flex:1;overflow-y:auto;padding:16px;display:flex;flex-direction:column;gap:14px}.empty{margin:auto;color:#a5a29a;font-size:14px;text-align:center}.message{display:flex}.message.user{justify-content:flex-end}.message.assistant{justify-content:flex-start}.bubble{max-width:80%;padding:10px 14px;border-radius:14px;font-size:14px;line-height:1.6;white-space:pre-wrap;word-break:break-word}.message.user .bubble{background:#1f1f1f;color:#fff;border-bottom-right-radius:4px}.message.assistant .bubble{background:#fff;border:1px solid #e4e2dc;border-bottom-left-radius:4px}.tool-log{margin-bottom:8px;display:flex;flex-direction:column;gap:4px}.tool-badge{font-size:12px;color:#6b6862;background:#f0efe9;border-radius:8px;padding:4px 8px;display:flex;align-items:center;gap:6px;width:fit-content}.tool-input{color:#a5a29a}.tool-done{color:#4a7a4a}.tool-pending,.cursor{animation:blink 1s infinite}@keyframes blink{50%{opacity:0}}.input-bar{display:flex;gap:8px;padding:14px 16px;border-top:1px solid #e4e2dc;background:#fff}.input-bar input{flex:1;padding:10px 14px;border-radius:10px;border:1px solid #e4e2dc;font-size:14px;outline:none}.input-bar input:focus{border-color:#b5b2a9}.input-bar button{padding:10px 18px;border-radius:10px;border:none;background:#1f1f1f;color:#fff;font-size:14px;cursor:pointer}.input-bar button:disabled{background:#cfccc4;cursor:not-allowed}