body{margin:0;font-family:Arial,sans-serif;background:#f4f6f9;color:#222}
header{background:#0f2747;color:#fff;padding:24px;text-align:center}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:20px;padding:24px}
.card{background:#fff;border-radius:14px;padding:20px;box-shadow:0 2px 8px rgba(0,0,0,.1)}
h2{margin-top:0}