How do I set a button’s width to 100%? I’d like to have a mobile-friendly button that spans most of the width of the screen (it’d be in a wrapper or grid division so that it’s more reasonably sized on a desktop screen). 

For the button variant in the DSS, it’s possible to specify 100% as the variant’s width; however, I’ve been unable to find any way of making that button actually fill the space in the page’s runtime.