.gallery_flex {
            display: flex;
            flex-grow: 1;
            flex-direction: row;
            justify-content: center;
            flex-wrap: wrap;
            margin: 4px;
            align-items: stretch;
        }

      
       

        .m1 {
            /* THIS AFFECTS ALL BOXES */
            /* flex-grow: 1; */
            margin: 15px;
            flex-basis: 300px;
            height: 300px;
            background-color: #ccc;
        }

        .lb-image a {
            margin: 1px;
        }