.columnstack {
    float: left;
    width: 40%;
    padding-left: 0px;
    padding-top: 23px;
    padding-bottom: 22px;
}

.stackleft {
    margin-right: 20%;
}

@media screen and (max-width: 600px) {
    .columnstack {
        width: 100%;
    }
}

.rowstack {
    height: 225px;
}