Challenge #3 - 3-column preview card component

Is it possible to add border-radius to .container (the columns group) in order to not have the border-radius of columns hard-coded when resizing the window?

Also when not using top: 0; on the resize, the .container appears off the site due to the technique of centering it on the page: {top:50%; left: 50%; transform: translate(-50%,-50%);}