[Basic] - Responsiveness Using Grid

See [this CodePen example](https://codepen.io/zmodem-/pen/yLjLzEj) which showcases how we can utilize some basic [CSS Grid](https://developer.mozilla.org/en-US/docs/Web/CSS/CSS_grid_layout) rules in order to setup a basic, [responsive layout](https://www.w3schools.com/html/html_responsive.asp). This example has *a ton* of room for improvement, and even some bad practices. However, the basic premise of a good "jumping off point" still holds true.