#photo_gallery {
    position: relative;
    overflow: hidden;
    /*perspective: 3000;
    perspective-origin: 50% 50%;*/
}

.photo_gallery_tile {
    position: absolute;
    -webkit-transition: all 0.3s;
    transition: all 0.3s;
    transform-origin: 50% 50%;
    opacity: 0;
}


.photo_gallery_tile:hover {
    /*z-index: 2000!important;*/
    /*transform: rotateY(10deg);*/
    filter: brightness(120%) saturate(130%);
}

/*.photo_gallery_tile_hover_frame {
    position: absolute;
    opacity: 0;
    left: 0; top: 0; width: 100%; height: 100%;
    border: 5px solid rgba(108, 214, 70, 1);
    box-sizing: border-box;
    -webkit-transition: all 0.3s;
    transition: all 0.3s;
}

.photo_gallery_tile:hover .photo_gallery_tile_hover_frame {
    opacity: 0.5;
}*/

.photo_gallery_tile > img {
    z-index: 0;
    width: 100%; height: 100%;
}

.photo_gallery_tile_black_grad {
    position: absolute;
    display: block;
    left: 0;
    bottom: 0;
    width: 100%;
    height: 80%;
    background: url('../images1/black_gradient.png') no-repeat;
    background-size: 100% 100%;
    opacity: 0;
    z-index: 1;
    transition: opacity 0.3s;
}

.photo_gallery_tile:hover > .photo_gallery_tile_black_grad {
    opacity: 0.9;
}

.photo_gallery_tile > .photo_gallery_tile_title {
    position: absolute;
    display: block;
    left: 0; bottom: 0; width: 100%;
    padding: 14px 8px;
    box-sizing: border-box;
    background: rgba(108, 214, 70, 0.0);

    font-family: Arial;
    letter-spacing: normal !important;
    color: #FFFFFF;
    font-size: 15px;
    font-weight: 300;
    line-height: 20px;

    text-align: center;
    z-index: 2;

    opacity: 0;
    transition: opacity 0.3s;
}

.photo_gallery_tile:hover > .photo_gallery_tile_title {
    opacity: 1;
    /*background: rgba(108, 214, 70, 0.6);*/
}