<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 64 64"><rect width="64" height="64" rx="14" fill="#1c3a5e"/><text x="32" y="45" font-family="Arial, Helvetica, sans-serif" font-size="40" font-weight="800" fill="#ffffff" text-anchor="middle">S</text></svg>
