.loading {
    width: 500px;
    max-width: 50%;
    height: auto;
    display: flex;
    flex-flow: column;
    justify-content: center;
    align-items: center;
    margin: 0;
    position: absolute;
    top: 50%;
    left: 50%;
    -ms-transform: translate(-50%, -50%);
    transform: translate(-50%, -50%);
}

@keyframes fadein {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

@keyframes fadeout {
    from {
        opacity: 1;
    }

    to {
        opacity: 0;
    }
}