I understand that the new introduction in HMTL5 (article, section, main, aside, footer, etc.) are good but they would have been better if they help in positioning or arranging sections of a web page easier. I've been wondering, since I can list an item using <li> and <ul> as the containing body all inside a <nav> and then tell them that I want them displayed inline, and it works, why can't I put my <nav>, <section> and <aside> into a containing body like <main> or <article> and then do this:Article nav section aside { display: inline }I mean, if this works:Nav ul li { display: inline }Why can't this work: article nav section aside { display: inline }