body{
    background-color:#f2f2f2;
}
#header{
    position:relative;
}

#gallery{
    padding: 90px 0;
}
#gallery .gallery-grid{
    display:flex;
}
#gallery .gallery-grid > li{ 
    width:50%;
} 
#gallery .gallery-grid li ul li{
    margin-bottom: 20px;
}
#gallery .gallery-grid li img{
    width: 100%;
    display: block;
}
#gallery .gallery-grid .left-column{
    padding-right: 10px;
}
#gallery .gallery-grid .right-column{
    padding-left: 10px;
}
#gallery .gallery-grid li ul{
    display: flex;
    flex-wrap: wrap;
}
#gallery .gallery-grid li ul li{
    width: 50%;
    box-sizing: border-box;
    cursor:pointer;
}
#gallery .gallery-grid li ul li.full{
    width: 100%;
}
#gallery .gallery-grid li ul li:hover{
    opacity: 0.9;
}

#preview-modal{
    width:100%;
    height: 100%;
    position: fixed;
    top: 0;
    left: 0;
    z-index: 99999;
    display:none;
}
#preview-modal .second-layer{
    width:100%;
    height: 100%;
    background-color:rgba(0, 0, 0, 0.7);
    cursor:zoom-out;
}
#preview-modal .modal{
    box-sizing: border-box;
    padding:50px 10px 10px 10px;
    background-color:#fff;
    position:absolute;
    border-radius: 2px;
}
#preview-modal .modal #close_preview{
    position: absolute;
    top: 10px;
    right: 10px;
    cursor: pointer;
    width: 30px;
    height: 30px;
}

@media screen and (max-width:550px){
    #gallery .gallery-grid{
        display: block;
    }
    #gallery .gallery-grid > li{
        width:100%;
        padding:0 !important;
    }
}
@media screen and (max-width:450px){
    #preview-modal .modal{
        width:95%;
    }
}