:root{--paper: #f5f3ec;--card: #fffdf8;--ink: #23261f;--muted: #6f7268;--line: #dfdcd0;--accent: #49634b;--accent-soft: #e6ece3;--danger: #9d3b2f;--radius: 14px;--shadow: 0 1px 2px rgba(35, 38, 31, .06), 0 8px 24px rgba(35, 38, 31, .05);color-scheme:light}*{box-sizing:border-box}html,body,#root{height:100%;margin:0}body{background:var(--paper);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,PingFang SC,Hiragino Sans GB,Microsoft YaHei,sans-serif;font-size:15px;line-height:1.65;-webkit-font-smoothing:antialiased}.shell{display:flex;flex-direction:column;height:100%;max-width:880px;margin:0 auto;padding:0 20px}.center{align-items:center;justify-content:center;text-align:center}.muted{color:var(--muted)}.fine{color:var(--muted);font-size:13px;margin:12px 0 0}.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:32px 28px}.card h1{margin:0 0 8px;font-size:26px;letter-spacing:.02em}.bar{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:18px 0 14px;border-bottom:1px solid var(--line)}.brand{display:flex;align-items:center;gap:9px;font-size:17px;letter-spacing:.02em}.dot{width:9px;height:9px;border-radius:50%;background:var(--accent);box-shadow:0 0 0 3px var(--accent-soft)}.dot[data-status=running]{animation:breathe 1.4s ease-in-out infinite}.meta{display:flex;align-items:center;gap:8px;color:var(--muted);font-size:13px}.meta [data-status=running]{color:var(--accent)}.sep{opacity:.5}.thread{flex:1;overflow-y:auto;padding:24px 2px 8px;display:flex;flex-direction:column;gap:18px}.empty{margin-top:12vh;text-align:center}.empty h2{font-size:20px;margin:0 0 8px}.empty p{max-width:460px;margin:0 auto}.bubble{max-width:78%;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:12px 16px;white-space:pre-wrap;word-break:break-word}.bubble.user{align-self:flex-end;background:var(--accent);border-color:var(--accent);color:#fbfbf7}.bubble.assistant{align-self:flex-start}.bubble-head{display:flex;align-items:center;justify-content:space-between;gap:16px;font-size:12px;letter-spacing:.04em;opacity:.72;margin-bottom:6px}.bubble-body{font-size:15px}.pulse{color:var(--accent)}.bubble.user .pulse{color:inherit}.typing{display:inline-flex;gap:4px;align-items:center;padding:4px 0}.typing i{width:6px;height:6px;border-radius:50%;background:var(--accent);opacity:.4;animation:blink 1.2s infinite}.typing i:nth-child(2){animation-delay:.2s}.typing i:nth-child(3){animation-delay:.4s}.alert{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:10px;padding:10px 14px;border:1px solid #e3c6c0;border-radius:10px;background:#fdf4f2;color:var(--danger);font-size:14px}.alert button{border:none;background:transparent;color:inherit;cursor:pointer;font-size:13px}.composer{display:flex;align-items:flex-end;gap:10px;padding:12px 0 20px;border-top:1px solid var(--line)}.composer textarea{flex:1;resize:none;padding:11px 14px;border:1px solid var(--line);border-radius:12px;background:var(--card);color:inherit;font:inherit;line-height:1.5;max-height:180px}.composer textarea:focus{outline:2px solid var(--accent-soft);border-color:var(--accent)}.button{display:inline-block;border:1px solid var(--accent);border-radius:11px;background:var(--accent);color:#fbfbf7;padding:10px 20px;font:inherit;font-size:14px;cursor:pointer;text-decoration:none;transition:opacity .15s ease}.button:hover{opacity:.9}.button:disabled{opacity:.45;cursor:default}.button.ghost{background:transparent;color:var(--accent)}@keyframes blink{0%,60%,to{opacity:.35}30%{opacity:1}}@keyframes breathe{0%,to{box-shadow:0 0 0 3px var(--accent-soft)}50%{box-shadow:0 0 0 6px var(--accent-soft)}}@media(max-width:640px){.bubble{max-width:92%}.meta span:nth-child(2),.meta span:nth-child(3){display:none}}