.span1,
.span2 {
    width: 100%;
}

.span1 > div,
.span2 > div {
    background: white;
}

.col-sml-4 {
    float: left;
    width: 33.333%;
}

.col-sml-6 {
    float: left;
    width: 50%;
}

.col-sml-12 {
    width: 100%;
}

main img.left,
main img.right {
    width: 100%;
    float: none;
    margin: 1em 0;
}

@media (min-width: 550px) {
    .items-row {
        flex-wrap: wrap;
        display: flex;
        width: 100%;
    }

    .span1,
    .span2 {
        display: flex;
        width: 50%;
        padding: 15px;
    }
    
    .col-mid-3 {
        float: left;
        width: 25%;
    }

    .col-mid-4 {
        float: left;
        width: 33.333%;
    }

    .col-mid-6 {
        float: left;
        width: 50%;
    }

    .col-mid-12 {
        width: 100%;
    }

    main img.left {
        width: 50%;
        margin: 2em;
        margin-left: 0;
        float: left;
    }

    main img.right {
        width: 50%;
        margin: 2em;
        margin-right: 0;
        float: right;
    }
}

@media (min-width: 850px) {
    .span1,
    .span2 {
        width: 33.333%;
        max-width: 322px;
    }

    .col-big-2 {
        float: left;
        width: 16.666%;
    }

    .col-big-3 {
        float: left;
        width: 25%;
    }

    .col-big-4 {
        float: left;
        width: 33.333%;
    }

    .col-big-6 {
        float: left;
        width: 50%;
    }

    .col-big-8 {
        float: left;
        width: 66.667%;
        padding-left: 30px;
    }

    .col-big-12 {
        width: 100%;
    }

    main img.left {
        width: 40%;
        margin: 2em;
        margin-left: 0;
        float: left;
    }

    main img.right {
        width: 40%;
        margin: 2em;
        margin-right: 0;
        float: right;
    }
}

@media (min-width: 1100px) {
    .col-max-2 {
        float: left;
        width: 16.666%;
    }

    .col-max-3 {
        float: left;
        width: 25%;
    }

    .col-max-4 {
        float: left;
        width: 33.333%;
    }

    .col-max-6 {
        float: left;
        width: 50%;
    }

    .col-max-9 {
        float: left;
        width: 75%;
    }

    .col-max-12 {
        width: 100%;
    }

    main img.left {
        width: 33.333%;
        margin: 2em;
        margin-left: 0;
        float: left;
    }

    main img.right {
        width: 33.333%;
        margin: 2em;
        margin-right: 0;
        float: right;
    }
}

main img.top {
    margin-top: 0;
}