una/template/_row_1_column_half.html

<div class="bx-layout-row">
    <div class="bx-layout-col bx-layout-1-column-half-column1 bx-layout-column-half max-w-full md:w-1/2 mx-auto">
        <div class="bx-layout-cell" id="bx-layout-cell-1">
            __cell_1__
        </div>
    </div>
</div>