#gallery-grid ul{
    margin: 0;
    padding: 0;
    text-align: center;
    list-style: none;
}
.gallery-grid-item{
    position: relative;
    margin: 0.5%;
    padding: 0;
    width: 19%;
    cursor: pointer;
    float:left;
}
.gallery-grid-item:hover .gallery-grid-item-over{
    opacity: 1;
}
.gallery-grid-item-over{
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(255,255,255,.41);
    opacity: 0;
    -webkit-transition: opacity 0.3s ease-out;
    -moz-transition: opacity 0.3s ease-out;
    -o-transition: opacity 0.3s ease-out;
    transition: opacity 0.3s ease-out;
}
.gallery-grid-item-over div{
    position: absolute;
    top: 50%;
    left: 50%;
    width: 80px;
    height: 80px;
    margin-top: -40px;
    margin-left: -40px;
    border-radius: 50%;
    background: rgba(255,255,255,.6) url("../img/ico-zoom.png") no-repeat center;
    background-size: 62%;
}
@media (max-width: 979px){
    .gallery-grid-item{
        width: 24%;
    }
    .gallery-grid-item-over div{
        width: 60px;
        height: 60px;
        margin-top: -30px;
        margin-left: -30px;
    }
 }
@media (max-width: 767px){
    .gallery-grid-item{
        width: 32.3%;
    }
    .gallery-grid-item-over div{
        width: 50px;
        height: 50px;
        margin-top: -25px;
        margin-left: -25px;
    }
 }
@media (max-width: 480px){
    .gallery-grid-item{
        width: 49%;
    }
    .gallery-grid-item-over div{
        width: 40px;
        height: 40px;
        margin-top: -20px;
        margin-left: -20px;
    }
}