.loaderback {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background-color: rgba(1, 1, 1, 0.6);
  z-index: 998;
  display: none; /* Oculto por defecto */
}

.loader {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  z-index: 999;
  display: none; /* Oculto por defecto */
  width: 48px;
  height: 48px;
  border-radius: 50%;
  border: 3px solid;
  border-color: #FFF #FFF transparent transparent;
  box-sizing: border-box;
  animation: rotation 1s linear infinite;
}
.loader::after,
.loader::before {
  content: '';  
  box-sizing: border-box;
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  bottom: 0;
  margin: auto;
  border: 3px solid;
  border-color: transparent transparent #37A398 #37A398;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  box-sizing: border-box;
  animation: rotationBack 0.5s linear infinite;
  transform-origin: center center;
}
.loader::before {
  width: 32px;
  height: 32px;
  border-color: #FFF #FFF transparent transparent;
  animation: rotation 1.5s linear infinite;
}
    
@keyframes rotation {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
} 
@keyframes rotationBack {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(-360deg);
  }
}