header, nav {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
}

header {
    font-size: 66%;
}

nav ul {
    display: flex;
    justify-content: flex-end;
    list-style-type: none;
}

.wrapper {
    display: flex;
    flex-direction: column;
    justify-content: space-around;
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
}

.wrapper > * {
    padding: .5em;
}

img {
    display: block;
    width: 50%;
    height: auto;
    margin: 0 auto;
}

.row {
    margin: 0;
    display: flex;
    flex-flow: row wrap;
    justify-content: space-evenly;
}

picture {
    padding-bottom: 1em;
}

[class*="col"] {
    margin: 0 1%;
}

@media only screen and (min-width: 768px) {
    header {
        font-size: 115%;
    }
    img {
        display: block;
        width: 100%;
        height: auto;
    }
    .order-pic {
        order: 2;
    }
    .row {
        flex: 0 1 auto;
    }

    .col1 {
        display: flex;
        flex-direction: column;
        width: 31.333%;
    }
    .col2 {
        display: flex;
        flex-direction: column;
        width: 64.667%;
    }
    .col3 {
        display: flex;
        flex-direction: column;
        width: 98%;
    }
}