.sb-hover-image {
    position: relative;
    display: inline-block;
}

.sb-hover-image img {
    display: block;
    transition: opacity 0.3s ease-in-out;
}

.sb-hover-image img.hover {
    position: absolute;
    top: 0;
    left: 0;
    opacity: 0;
}

.sb-hover-image:hover img.hover {
    opacity: 1;
}

.sb-hover-image:hover img.normal {
    opacity: 0;
}