Flexbox Absolute Centered Div

flexbox-absolute-centered

/* Vertical align
https://chriswrightdesign.com/experiments/flexbox-adventures/#
*/

.d-flex-vertical {
	/* Tell flexbox to start vertically from the center */
	align-items:center;
	display:flex;
	/* I'm also aligning it horizontally */
	justify-content:center;
}
/* all the child element needs is to be a flex item */
.d-flex-vertical > div {
	display:flex;
}