Is there a way to style this diagram with CSS that will work on IE11 and all major browsers?
It seems like Flexbox doesn't support dynamic height.
Do I need separate left and right columns for larger viewports and no columns for smaller viewports?
<div class="container">
<div id="box1" class="box">box1</div>
<div id="box2" class="box">box2</div>
<div id="box3" class="box">box3</div>
<div id="box4" class="box">box4</div>
<div id="box5" class="box">box5</div>
</div>