.js-activate-loader:disabled {
    cursor: not-allowed;
    opacity: 0.7;
}

.js-activate-loader:disabled:hover {
    opacity: 0.7;
}

/* Absolute Center Spinner */
.loading {
    width: 40px;
    display: inline-block;
    position: relative;
}

/* Transparent Overlay */
.loading:before {
    content: '';
    display: inline-block;
    position: relative;
    background: radial-gradient(rgba(20, 20, 20, .8), rgba(0, 0, 0, .8));
    background: -webkit-radial-gradient(rgba(20, 20, 20, .8), rgba(0, 0, 0, .8));
}

/* :not(:required) hides these rules from IE9 and below */
.loading:not(:required) {
    /* hide "loading..." text */
    font: 0/0 a;
    text-shadow: none;
    border: 0;
}

.loading:not(:required):after {
    content: '';
    display: block;
    font-size: 7px;
    width: 1em;
    height: 1em;
    margin-top: -0.9em;
    -webkit-animation: spinner 150ms infinite linear;
    -moz-animation: spinner 150ms infinite linear;
    -ms-animation: spinner 150ms infinite linear;
    -o-animation: spinner 150ms infinite linear;
    animation: spinner 150ms infinite linear;
    border-radius: 0.5em;
    -webkit-box-shadow: rgba(255, 255, 255, 0.75) 1.5em 0 0 0, rgba(255, 255, 255, 0.75) 1.1em 1.1em 0 0, rgba(255, 255, 255, 0.75) 0 1.5em 0 0, rgba(255, 255, 255, 0.75) -1.1em 1.1em 0 0, rgba(255, 255, 255, 0.75) -1.5em 0 0 0, rgba(255, 255, 255, 0.75) -1.1em -1.1em 0 0, rgba(255, 255, 255, 0.75) 0 -1.5em 0 0, rgba(255, 255, 255, 0.75) 1.1em -1.1em 0 0;
    box-shadow: rgba(255, 255, 255, 0.75) 1.5em 0 0 0, rgba(255, 255, 255, 0.75) 1.1em 1.1em 0 0, rgba(255, 255, 255, 0.75) 0 1.5em 0 0, rgba(255, 255, 255, 0.75) -1.1em 1.1em 0 0, rgba(255, 255, 255, 0.75) -1.5em 0 0 0, rgba(255, 255, 255, 0.75) -1.1em -1.1em 0 0, rgba(255, 255, 255, 0.75) 0 -1.5em 0 0, rgba(255, 255, 255, 0.75) 1.1em -1.1em 0 0;
}

/* Animation */

@-webkit-keyframes spinner {
    0% {
        -webkit-transform: rotate(0deg);
        -moz-transform: rotate(0deg);
        -ms-transform: rotate(0deg);
        -o-transform: rotate(0deg);
        transform: rotate(0deg);
    }

    100% {
        -webkit-transform: rotate(360deg);
        -moz-transform: rotate(360deg);
        -ms-transform: rotate(360deg);
        -o-transform: rotate(360deg);
        transform: rotate(360deg);
    }
}

@-moz-keyframes spinner {
    0% {
        -webkit-transform: rotate(0deg);
        -moz-transform: rotate(0deg);
        -ms-transform: rotate(0deg);
        -o-transform: rotate(0deg);
        transform: rotate(0deg);
    }

    100% {
        -webkit-transform: rotate(360deg);
        -moz-transform: rotate(360deg);
        -ms-transform: rotate(360deg);
        -o-transform: rotate(360deg);
        transform: rotate(360deg);
    }
}

@-o-keyframes spinner {
    0% {
        -webkit-transform: rotate(0deg);
        -moz-transform: rotate(0deg);
        -ms-transform: rotate(0deg);
        -o-transform: rotate(0deg);
        transform: rotate(0deg);
    }

    100% {
        -webkit-transform: rotate(360deg);
        -moz-transform: rotate(360deg);
        -ms-transform: rotate(360deg);
        -o-transform: rotate(360deg);
        transform: rotate(360deg);
    }
}

@keyframes spinner {
    0% {
        -webkit-transform: rotate(0deg);
        -moz-transform: rotate(0deg);
        -ms-transform: rotate(0deg);
        -o-transform: rotate(0deg);
        transform: rotate(0deg);
    }

    100% {
        -webkit-transform: rotate(360deg);
        -moz-transform: rotate(360deg);
        -ms-transform: rotate(360deg);
        -o-transform: rotate(360deg);
        transform: rotate(360deg);
    }
}