.gallery_entry {
    display:inline-block;
    width: 30%;
    margin-right: 6px;
}
div.gallery_entry li{
    margin-bottom: -5px;
    /*margin-top: 4px;*/
    list-style-type: none; 
    display: inline-block;
}

div.gallery_entry li img{
    height: auto;
    max-width: 85px;
    width: 94%;
    /*    margin-right: 2%;
        margin-left: 2%;
        padding: 5px;
    box-shadow: 0px 0px 2px rgba(0, 0, 0, 0.16); */
}
ul.gallery_attachment_widget{
    /*border: 1px solid #ECECEC;*/
    /*padding: 10px;*/
    max-width: 500px;
    /*text-align: center;*/
    margin: auto auto;
}