.generador-container {
  width: 620px;
  height: 550px;
  background: radial-gradient(circle, #111 30%, #222 80%);
  display: flex;
  align-items: center;
  justify-content: center;
  border: 4px solid #00f0ff;
  border-radius: 50%;
  box-shadow: 0 0 40px #00f0ff88;
  margin-top: -160px;
}

#generador-pixeles {
  position: relative;
  width: 400px;
  height: 400px;
}
.pixel {
  position: absolute;
  width: 20px;
  height: 20px;
  opacity: 0;
}