.loading_adding_to_cart {
    pointer-events: none;
    opacity: 0.7;
}

.loading_adding_to_cart:after {
    content: '';
    display: inline-block;
    margin-left: 10px;
    border-radius: 50%;
    border: 2px solid #bbb;
    border-top: 2px solid #444;
    width: 15px;
    height: 15px;
    -webkit-animation: spin_adding_to_cart 1s linear infinite;
    animation: spin_adding_to_cart 1s linear infinite;
}

    /* Animación del spinner */
@-webkit-keyframes spin_adding_to_cart {
    0% { -webkit-transform: rotate(0deg); }
    100% { -webkit-transform: rotate(360deg); }
}

@keyframes spin_adding_to_cart {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}