<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512">
  <defs>
    <linearGradient id="bg" x1="0" y1="0" x2="1" y2="1">
      <stop offset="0" stop-color="#0e1a33"></stop>
      <stop offset="1" stop-color="#1d3158"></stop>
    </linearGradient>
    <radialGradient id="glow" cx="0.25" cy="0.2" r="0.7">
      <stop offset="0" stop-color="#3ee0a8" stop-opacity="0.25"></stop>
      <stop offset="1" stop-color="#3ee0a8" stop-opacity="0"></stop>
    </radialGradient>
  </defs>
  <rect width="512" height="512" rx="112" fill="url(#bg)"></rect>
  <rect width="512" height="512" rx="112" fill="url(#glow)"></rect>
  <circle cx="256" cy="256" r="184" fill="none" stroke="#3ee0a8" stroke-opacity="0.18" stroke-width="23" stroke-linecap="round" stroke-dasharray="867.0795723907829 1156.1060965210438" transform="rotate(-65 256 256)"></circle>
  <path d="M 256 256 m -184 0 a 184 184 0 0 1 295 -110" fill="none" stroke="#3ee0a8" stroke-width="23" stroke-linecap="round" transform="rotate(180 256 256)"></path>
  <text x="256" y="290" text-anchor="middle" font-family="Georgia, serif" font-style="italic" font-weight="700" font-size="320" fill="#3ee0a8">T</text>
</svg>