.lazyload,
.lazyloading {
    opacity: 0;
}

.lazyloaded {
    opacity: 1;
    transition: opacity 300ms;
}

.lazyload {
    opacity: 0;
}

.lazyloading {
    opacity: 1;
    transition: opacity 300ms;
    /* background: #f7f7f7 url('https://cdnjs.cloudflare.com/ajax/libs/jquery.lazyloadxt/1.1.0/loading.gif') no-repeat center; */
}

/* remove borders */
img:not([src]) {
    visibility: hidden;
}