.row {
    margin: 8px -25px 0px 0px;
}

/* Add padding BETWEEN each column (if you want) */
.row,
.row > .column {
    padding: 0px;
}

/* Create four equal columns that floats next to each other */
.column {
    float: left;
    width: 33%;
    display: none; /* Hide columns by default */
}

/* The "show" class is added to the filtered elements */
.show {
    display: inline-block;
}

/* Responsive layout - makes a two column-layout instead of four columns */
@media screen and (max-width: 900px) {
    .column {
        width: 50%;
    }
}

/* Responsive layout - makes the two columns stack on top of each other instead of next to each other */
@media screen and (max-width: 600px) {
    .column {
        width: 100%;
    }
}

.gallery-image {
    width : 180px;
    border-radius: 10px;
}