There are times when we want to place a specific child item out of flexbox context, so we have granular control on its placement relative to its parent.
justify-self doesn't seem to work, contrast to its sibling
The flexbox layout specification talks about absolutely-positioned children:
As it is out-of-flow, an absolutely-positioned child of a flex container does not participate in flex layout.
Taking this into account, we can let flex items of choice opt-out flexbox layout, and be positioned using