:root{--bg:#f6f7f9;--surface:#fff;--surface-2:#eef2f7;--text:#172033;--muted:#64748b;--line:#d9e0ea;--primary:#2563eb;--primary-strong:#1d4ed8;--positive:#087f5b;--negative:#c2410c;--shadow:0 10px 28px #161f3314}*{box-sizing:border-box}body{background:var(--bg);color:var(--text);margin:0;font-family:Arial,Helvetica,sans-serif;font-size:16px;line-height:1.5}button,input,select{font:inherit}button{cursor:pointer}.shell{grid-template-columns:260px minmax(0,1fr);min-height:100dvh;display:grid}.sidebar{color:#f8fafc;background:#101827;padding:24px}.brand{align-items:center;gap:12px;margin-bottom:32px;display:flex}.brand svg{color:#60a5fa}.brand strong,.brand span{display:block}.brand span{color:#b6c2d2;font-size:14px}.nav{gap:6px;display:grid}.nav button{color:#cbd5e1;text-align:left;background:0 0;border:0;border-radius:8px;min-height:44px;padding:10px 12px}.nav 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