#root-loading {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

#root-spinner {
    box-sizing: border-box;
    height: 24px;
    width: 24px;
    border: 2px solid lightgray;
    border-top: 2px solid gray;
    border-radius: 50%;
    animation: root-spinner-spin 1s linear infinite;
}

@keyframes root-spinner-spin {
    0% {
        transform: rotate(0deg);
    }
    100% {
        transform: rotate(360deg);
    }
}