.gm_addtocartspinner {
   width: 100%;
   height: 100%;
   position: fixed;
   top:0;
   left: 0;
   z-index: 9999;
   display: flex;
   align-items: center;
   justify-content: center;
}

.lds-dual-ring {
   display: inline-block;
   width: 80px;
   height: 80px;
}
.lds-dual-ring:after {
   content: " ";
   display: block;
   width: 64px;
   height: 64px;
   margin: 8px;
   border-radius: 50%;
   border: 6px solid #666;
   border-color: #666 transparent #666 transparent;
   animation: lds-dual-ring 1.2s linear infinite;
}
@keyframes lds-dual-ring {
   0% {
      transform: rotate(0deg);
   }
   100% {
      transform: rotate(360deg);
   }
}