.mosaicpic-wrapper-items {
    position:   absolute;
    background-image:   url("../img/loader.gif");
    background-position:    center center;
    background-repeat:  no-repeat;
}


.mosaicpic-wrapper-items div {
    height: 100%;
    width:  100%;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

.mosaicpic-wrapper-items:hover div {
    background-color:   rgba(0,0,0,0.7);
    background-position: center center;
    background-repeat:  no-repeat;
    background-image:   url("../img/lupa.png");
}