:root{--bg:#0d0d0d;--bg2:#141414;--bg3:#1c1c1c;--bg4:#222;--border:#252525;--border2:#303030;--text:#e0e0e0;--text2:#888;--text3:#444;--accent:#4f8ef7;--accent-dim:rgba(79,142,247,.12);--green:#3fb950;--green-dim:rgba(63,185,80,.12);--red:#f85149;--red-dim:rgba(248,81,73,.12);--yellow:#d29922;--yellow-dim:rgba(210,153,34,.12);--font-mono:"SF Mono","Fira Code","Cascadia Code","Consolas",monospace;--font-ui:-apple-system,BlinkMacSystemFont,"Segoe UI",system-ui,sans-serif;--chat-w:220px;--file-w:200px}html,body{height:100%;background:var(--bg);color:var(--text);font-family:var(--font-ui);font-size:13px;line-height:1.5;overflow:hidden}::-webkit-scrollbar{width:5px;height:5px}::-webkit-scrollbar-thumb:hover{background:#3a3a3a}.spin{animation:spin .8s linear infinite;display:inline-block}@keyframes spin{to{transform:rotate(360deg)}}.app{display:flex;height:100vh;overflow:hidden}.chat-sidebar{width:var(--chat-w);min-width:var(--chat-w);background:var(--bg2);border-right:1px solid 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