Full-Width Containers in Limited Width Parents

@mixin full-width {
	width: 100%;
	width: 100vw;
	position: relative;
	left: 50%;
	right: 50%;
	margin-left: -50vw;
	margin-right: -50vw;
}

The idea here is:
1. push the container to the exact middle of the browser window with left: 50%
2. pull it back to the left edge with negative -50vw margin
https://css-tricks.com/full-width-containers-limited-width-parents/