No, not exactly like that. But what you can do is exclude your base theme's CSS and configure AO to defer CSS, which would result in
style.css > content > deferred_min.css
You could then optionally minimize your style CSS to obtain the best result possible.
FYI: the next major version of AO will, in case you choose "defer", allow you to specify CSS that will be inlined in head.
hope this helps,
frank