<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 64 64"><rect width="64" height="64" rx="10" fill="#1a3a5c"/><text x="32" y="46" font-family="Arial Black,Arial,sans-serif" font-size="36" font-weight="900" text-anchor="middle" fill="white">F</text></svg>