@keyframes spinner-border {
    to {
        transform: rotate(360deg);
    }
}

.spinner {
    display: inline-block;
    border-width: .2em;
    width: 1rem;
    height: 1rem;
    vertical-align: text-bottom;
    border: .2em solid currentColor;
    border-right-color: transparent;
    -webkit-animation: spinner-border .75s linear infinite;
    animation: spinner-border .75s linear infinite;
}