<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512" role="img" aria-label="Arcadia Imperial favicon">
  <defs>
    <linearGradient id="bg" x1="0" y1="0" x2="1" y2="1">
      <stop offset="0" stop-color="#0B6B30"/>
      <stop offset="0.55" stop-color="#16A34A"/>
      <stop offset="1" stop-color="#22C55E"/>
    </linearGradient>
    <radialGradient id="glow" cx="25%" cy="18%" r="70%">
      <stop offset="0" stop-color="#FFFFFF" stop-opacity="0.24"/>
      <stop offset="0.62" stop-color="#FFFFFF" stop-opacity="0"/>
    </radialGradient>
    <filter id="shadow" x="-30%" y="-30%" width="160%" height="160%">
      <feDropShadow dx="0" dy="18" stdDeviation="18" flood-color="#000000" flood-opacity="0.32"/>
    </filter>
  </defs>
  <rect width="512" height="512" rx="70" fill="url(#bg)"/>
  <rect width="512" height="512" rx="70" fill="url(#glow)"/>
  <text x="50%" y="54%" text-anchor="middle" dominant-baseline="middle"
        font-family="Sora, Inter, Arial, sans-serif" font-size="228" font-weight="900"
        letter-spacing="-22" fill="#FFFFFF" filter="url(#shadow)">AI</text>
</svg>
