:root{color-scheme:light;--bg: #f6f7f4;--panel: #ffffff;--panel-soft: #eef2ed;--text: #1c211e;--muted: #657169;--line: #d9dfd9;--accent: #2d6d63;--accent-soft: #dcefeb;--code-bg: #18211f;--code-text: #e6f2ee;font-family:Aptos,Avenir Next,Helvetica Neue,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}:root[data-theme=dark]{color-scheme:dark;--bg: #101312;--panel: #171b1a;--panel-soft: #202725;--text: #edf3ef;--muted: #9aa8a1;--line: #2c3431;--accent: #7ad2bf;--accent-soft: #203b36;--code-bg: #070908;--code-text: #dce9e5}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);text-rendering:optimizeLegibility}button,input{font:inherit}.app-shell{--sidebar-width: 340px;display:grid;grid-template-columns:var(--sidebar-width) 8px minmax(0,1fr);height:100vh;overflow:hidden}.sidebar{background:var(--panel);min-height:0;display:flex;flex-direction:column}.splitter{cursor:col-resize;background:linear-gradient(to 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