.captcha {
  display: flex;
  justify-content: space-around;
  /*align-items: center;*/
  background-color: #f0f0f0;
  border: 1px solid #ccc;
  height: 38px;
  /*margin-left: 12px;  Margen izquierdo de 10 píxeles */
  margin-bottom: 3px;
  border-radius: 5px;
   box-shadow: 5px 5px 10px rgba(0, 0, 0, 0.2); /* Sombra externa */
  
 }

.captcha-letter {
  font-family: monospace;
  font-size: 20px;
  color: #333;
  /* Simula distorsión con transformaciones aleatorias */
  transform: rotate(-5deg) skewX(2deg) scale(1.1);
  letter-spacing: 4px;
  
}  
.text-span{
    font-size: 20px;
    color: red;
}
.posDer{
    float: right;
}