:root{color-scheme:dark;--bg:#0b0d10;--panel:#12151a;--panel2:#181c22;--line:#292f38;--muted:#8f99a8;--text:#eef2f7;--accent:#57d99a;--user:#26354f}*{box-sizing:border-box}html,body{margin:0;height:100%;font-family:Inter,"Segoe UI","Microsoft YaHei",sans-serif;background:var(--bg);color:var(--text)}button,input{font:inherit}.shell{height:100vh;display:grid;grid-template-columns:350px 1fr;overflow:hidden}.sidebar{background:var(--panel);border-right:1px solid var(--line);display:flex;flex-direction:column;min-width:0}.brand{display:flex;gap:12px;align-items:center;padding:22px 20px 14px}.logo{width:40px;height:40px;border-radius:13px;background:linear-gradient(145deg,#57d99a,#248a67);display:grid;place-items:center;font-weight:800;color:#06130e}.brand h1{font-size:17px;margin:0 0 3px}.brand p,.conversation-head p{font-size:12px;color:var(--muted);margin:0}.search{margin:8px 16px 12px;border:1px solid var(--line);background:#0d1014;border-radius:11px;display:flex;align-items:center;padding:0 12px;color:var(--muted)}.search input{width:100%;height:40px;border:0;outline:0;background:transparent;color:var(--text);padding-left:8px}.summary{padding:0 18px 10px;display:flex;justify-content:space-between;align-items:center;color:var(--muted);font-size:12px}.summary button{border:0;background:transparent;color:var(--accent);cursor:pointer}.threads{overflow:auto;padding:0 10px 20px}.thread{width:100%;border:0;text-align:left;color:var(--text);background:transparent;padding:12px;border-radius:11px;cursor:pointer;margin:2px 0}.thread:hover,.thread.active{background:var(--panel2)}.thread.active{box-shadow:inset 3px 0 var(--accent)}.thread-title{white-space:nowrap;overflow:hidden;text-overflow:ellipsis;font-size:14px;font-weight:650;margin-bottom:5px}.thread-meta{white-space:nowrap;overflow:hidden;text-overflow:ellipsis;color:var(--muted);font-size:11px}.conversation{display:flex;flex-direction:column;min-width:0}.conversation-head{height:77px;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;padding:0 28px;background:rgba(18,21,26,.85);backdrop-filter:blur(12px)}.conversation-head h2{font-size:17px;margin:0 0 5px}.readonly{color:var(--accent);border:1px solid #285943;border-radius:20px;padding:6px 11px;font-size:11px}.messages{overflow:auto;flex:1;padding:28px max(28px,calc((100% - 900px)/2)) 80px}.turn{margin:0 0 30px}.label{color:var(--muted);font-size:11px;text-transform:uppercase;letter-spacing:.08em;margin:0 0 8px}.bubble{border:1px solid var(--line);border-radius:14px;padding:15px 17px;white-space:pre-wrap;word-break:break-word;line-height:1.65;font-size:14px;background:var(--panel)}.user .bubble{background:var(--user);border-color:#334968}.assistant{margin-top:14px}.assistant .bubble{background:transparent}.commentary{color:#b7c0cd;font-size:13px;border-left:2px solid #47515f;padding:8px 12px;margin:7px 0}.tool{margin:8px 0;border:1px solid var(--line);border-radius:9px;background:#0c0f13}.tool summary{cursor:pointer;color:var(--muted);font-size:12px;padding:9px 12px}.tool pre{white-space:pre-wrap;word-break:break-word;margin:0;padding:12px;border-top:1px solid var(--line);font-size:11px;max-height:420px;overflow:auto}.empty{height:65vh;display:grid;place-items:center;align-content:center;text-align:center;color:var(--muted)}.empty-icon{font-size:34px;color:var(--accent);margin-bottom:12px}.empty h3{color:var(--text);margin:0 0 8px}.empty p{max-width:430px;line-height:1.7;margin:0}.loading{color:var(--muted);padding:30px;text-align:center}@media(max-width:800px){.shell{grid-template-columns:280px 1fr}.messages{padding:20px}}