<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 64 64"><rect width="64" height="64" rx="14" fill="#1f7a5a"/><text x="32" y="33" font-family="-apple-system,Segoe UI,Roboto,Arial,sans-serif" font-size="30" font-weight="700" fill="#ffffff" text-anchor="middle" dominant-baseline="central">SO</text></svg>