* {
    box-sizing: border-box;
}



.gallery{
    margin-left: 70px;
    margin-right: 70px;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.row {
    display: flex;
    flex-wrap: wrap;
    padding: 0 4px;
}

/* Create four equal columns that sit next to each other */
.column {
    flex: 25%;
    max-width: 25%;
    padding: 0 4px;
}

.column img {
    margin-top: 8px;
    vertical-align: middle;
    width: 100%;
    height: auto;
}

.certificate{
    padding-top:  20px;
    width: 100%;
    height: auto;

}
/* Responsive layout - makes a two column-layout instead of four columns */
@media screen and (max-width: 800px) {
    .column {
        flex: 50%;
        max-width: 50%;
    }
    .gallery{
        margin-left: 20px;
        margin-right: 20px;
    }
}

/* 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 {
        flex: 100%;
        max-width: 100%;
    }
    .gallery{
        margin-left: 10px;
        margin-right: 10px;
    }
}