<span><span><span><section</span> class<span>="image-grid"</span>></span>
</span>  <span><span><span><div</span> class<span>="image__cell is-collapsed"</span>></span>
</span>    <span><span><span><div</span> class<span>="image--basic"</span>></span>
</span>      <span><span><span><a</span> href<span>="#expand-jump-1"</span>></span>
</span>        <span><span><span><img</span> id<span>="expand-jump-1"</span> 
</span></span><span>                 <span>class<span>="basic__img"</span>
</span></span><span>                 <span>src<span>="https://lorempixel.com/250/250/fashion/1"</span> alt<span>="Fashion 1"</span>></span>
</span>      <span><span><span></a</span>></span>
</span>      <span><span><span><div</span> class<span>="arrow--up"</span>></span><span><span></div</span>></span>
</span>    <span><span><span></div</span>></span>
</span>    <span><span><span><div</span> class<span>="image--expand"</span>></span>
</span>      <span><span><span><a</span> href<span>="#close-jump-1"</span> class<span>="expand__close"</span>></span><span><span></a</span>></span>
</span>      <span><span><span><img</span> class<span>="image--large"</span> 
</span></span><span>           <span>src<span>="https://lorempixel.com/400/400/fashion/1"</span> alt<span>="Fashion 1"</span>></span>
</span>    <span><span><span></div</span>></span>
</span>  <span><span><span></div</span>></span>
</span>  ...
<span><span><span></section</span>></span></span>

<span>/* apply a natural box layout model to all elements,
</span><span>   but allowing components to change */
</span>
<span>html {
</span>  <span>box-sizing: border-box;
</span><span>}
</span>
<span>*<span>, *:before, *:after</span> {
</span>  <span>box-sizing: inherit;
</span><span>}</span>