<svg xmlns="http://www.w3.org/2000/svg" width="800" height="800" viewBox="0 0 800 800" fill="none">
  <defs>
    <linearGradient id="bg" x1="0" y1="0" x2="1" y2="1">
      <stop offset="0" stop-color="#0b1220"/>
      <stop offset="1" stop-color="#0f2f2a"/>
    </linearGradient>
    <linearGradient id="g" x1="0" y1="0" x2="1" y2="1">
      <stop offset="0" stop-color="#22c55e"/>
      <stop offset="0.5" stop-color="#3b82f6"/>
      <stop offset="1" stop-color="#a855f7"/>
    </linearGradient>
  </defs>
  <rect width="800" height="800" fill="url(#bg)"/>
  <circle cx="400" cy="330" r="140" fill="rgba(255,255,255,0.10)"/>
  <path d="M190 700c34-130 144-210 210-210s176 80 210 210" fill="rgba(255,255,255,0.08)"/>
  <circle cx="400" cy="330" r="120" stroke="url(#g)" stroke-width="18" opacity="0.9"/>
  <text x="400" y="740" text-anchor="middle" font-family="ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial" font-size="22" font-weight="600" fill="rgba(255,255,255,0.75)">
    Imagen placeholder (reemplazar)
  </text>
</svg>

