@keyframes spinner {
    0% {
        transform: translate3d(-50%, -50%, 0) rotate(0deg);
    }
    100% {
         transform: translate3d(-50%, -50%, 0) rotate(360deg);
    }
}

.spinner {
    height: 52px;
    width: 52px;
    position: relative;
}

.spinner::before {
    animation: 2s linear infinite spinner;
    border: solid 4px var(--grey);
    border-bottom-color: var(--dark-blue);
    border-radius: 50%;
    content: "";
    height: 46px;
    width: 46px;
    left: 50%;
    top: 50%;
    opacity: inherit;
    position: absolute;
    transform: translate3d(-50%, -50%, 0);
    transform-origin: center;
    will-change: transform;
}