:root{--bg:#e5e7eb;--surface:#f3f4f6;--card:#fff;--text:#0f172a;--text-soft:#374151;--muted:#6b7280;--primary:#0ea5e9;--primary-dark:#0284c7;--primary-soft:#0ea5e926;--border:#94a3b873;--radius:14px;--radius-sm:10px;--shadow-sm:0 4px 12px #0f172a0f;--shadow-md:0 14px 34px #0f172a1f;--focus:0 0 0 3px #0ea5e959}*{box-sizing:border-box;margin:0;padding:0}html,body{height:100%}body{background:radial-gradient(1200px 600px at 80% -100px,#94a3b840,transparent),var(--bg);color:var(--text);min-height:100vh;margin:0;padding:0;font-family:IBM Plex Sans,Inter,system-ui,sans-serif}.app-shell{min-height:100vh;display:flex}.sidebar{background:linear-gradient(#0f172a 0%,#1e293b 100%);flex-direction:column;flex-shrink:0;width:210px;height:100vh;padding:28px 12px 24px;display:flex;position:sticky;top:0;overflow-y:auto}.sidebar-nav{flex-direction:column;gap:4px;margin-top:8px;display:flex}.sidebar-item{color:#94a3b8;cursor:pointer;text-align:left;background:0 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