.success-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.7);
  display: none;
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-pack: center;
      -ms-flex-pack: center;
          justify-content: center;
  -webkit-box-align: center;
      -ms-flex-align: center;
          align-items: center;
  z-index: 9999;
}

.success-message-box {
  background: #4CAF50;
  color: white;
  padding: 20px 40px;
  border-radius: 8px;
  text-align: center;
  max-width: 400px;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  font-family: Arial, sans-serif;
}

.success-message-box h3 {
  margin: 0 0 10px 0;
  font-size: 1.5em;
  margin-bottom: 10px;
}

.success-message-box p {
  margin: 0;
  font-size: 1.1em;
  line-height: 1.4;
}

/* Animación de desvanecimiento */
.fade-out {
  animation: fadeOut 0.5s ease-in forwards;
}

@keyframes fadeOut {
  from { opacity: 1; }
  to { opacity: 0; }
}