.cover_protect{
    z-index:3;position:absolute;top:50%;left:40%;
}
.overlay_gal{
    z-index:2;position:absolute;width:100%;height:100%;background-color:rgba(125,125,125,0);
}
.gal_item{
    border:5px solid grey;border-radius:5%;height:300px;position:relative;overflow:hidden;
}