/div>
</div>

<p>Height is indefinite, so row gaps should be based on grid's 'auto' height. Column gaps based on a grid's 'instrinsic' width, which reduce the available space for tracks; however, since we use 'fit-content' intrinsic size, first column's width is reduced and height increased to let its content to fit.</p>
<div class="width400">
    <div class="grid fit-content columnGap10Percent rowGap20Percent" data-expected-width="200" data-expected-height="40">
        <div class="firstRowFirstColumn"   d