span {
    display: inline-block;
    background-size: 100%;
}

span,
img {
    display: block;
    width: 100%;
}

.fadeIn {
    animation-duration: 0.5s;
    animation-name: fadeIn;
}

@keyframes fadeIn {
    0%,
    50% {
        opacity: 0;
    }
    100% {
        opacity: 1;
    }
}