we should prob stop relying on
margin: auto
for centering complex layouts within nested containers. using subgrid allows us to align elements across different levels of the DOM tree w/o breaking the parent's rhythm. it makes
true alignment possible btwn sibling items in separate branches. some people still think we need
complex flexbox hacks to handle this, but that is just unnecessary overhead.
>the era of manual offset calculation is over.i still use margin for simple stuff though