:root{--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light;--background:#f7f8fb;--surface:#fff;--text:#172033;--muted:#667085;--border:#e4e7ec;--accent:#315efb}*{box-sizing:border-box}body{background:var(--background);color:var(--text);margin:0;font-family:Arial,sans-serif}a{color:inherit;text-decoration:none}.shell{grid-template-columns:230px 1fr;min-height:100vh;display:grid}.sidebar{background:var(--surface);border-right:1px solid var(--border);padding:24px 16px}.brand{margin-bottom:28px;font-size:22px;font-weight:800}.nav{gap:8px;display:grid}.nav a{color:var(--muted);border-radius:9px;padding:10px 12px}.nav a:hover{color:var(--accent);background:#f1f4ff}.main{padding:32px}.grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;display:grid}.card{background:var(--surface);border:1px solid var(--border);border-radius:14px;padding:20px}.metric{margin-top:8px;font-size:30px;font-weight:800}.muted{color:var(--muted)}.button{background:var(--accent);color:#fff;border:0;border-radius:10px;justify-content:center;align-items:center;padding:10px 15px;font-weight:700;display:inline-flex}@media (max-width:800px){.shell{grid-template-columns:1fr}.sidebar{border-right:0;border-bottom:1px solid var(--border)}.nav{grid-template-columns:repeat(3,1fr)}.main{padding:20px}.grid{grid-template-columns:1fr}}