<?xml version="1.0" encoding="UTF-8"?>
<svg xmlns="http://www.w3.org/2000/svg" width="64" height="64" viewBox="0 0 64 64">
  <defs>
    <style>
      .bg { fill: #117f5e; }
      .txt { fill: #ffffff; font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; font-weight: 700; font-size: 32px; }
    </style>
  </defs>
  <circle class="bg" cx="32" cy="32" r="30" />
  <text class="txt" x="50%" y="50%" dominant-baseline="central" text-anchor="middle">A</text>
</svg>