t: 3em; /* percentages become auto (see 10.5 and 10.7) and intrinsic height is more than 3em, so 3em wins */ padding: 0; width: 12em; }
   .nose > div { padding: 1em 1em 3em; height: 0; background: yellow; }
   .nose div div { width: 2em; height: 2em; background: red; margin: auto; }
   .nose :hover div { border-color: blue; }
   .nose div:hover :before { border-bottom-color: inherit; }
   .nose div:hover :after { border-top-color: inherit; }
   .nose div div:before { display: block; border-style: none soli