Saving bytes makes sense. But how does the rendering engine know that those lines are CSS instead of junk text? And without a head tag, how do those lines not e

Saving bytes makes sense. But how does the rendering engine know that those lines are CSS instead of junk text? And without a head tag, how do those lines not end up as text in the body of the document? And isn't it strange that it doesn't have a title tag (though, if you aren't going to have a head section, maybe skipping the title tag makes sense too).