.loading-hourglass {
    display: inline-block;
    position: relative;
    width: 80px;
    height: 80px;
}

.loading-hourglass:after {
    content: " ";
    display: block;
    border-radius: 50%;
    width: 0;
    height: 0;
    margin: 8px;
    box-sizing: border-box;
    border: 32px solid var(--text-secondary);
    border-color: var(--text-secondary) transparent var(--text-secondary) transparent;
    animation: loading-hourglass 2s infinite;
}

@keyframes loading-hourglass {
    0% {
        transform: rotate(0);
        animation-timing-function: cubic-bezier(0.55, 0.055, 0.675, 0.19);
    }

    50% {
        transform: rotate(900deg);
        animation-timing-function: cubic-bezier(0.215, 0.61, 0.355, 1);
    }

    100% {
        transform: rotate(1800deg);
    }
}