#vertical {
  width:15em; 
  padding:0;
  margin:0 auto; 
  list-style-type:none; 
  font-size:1.4em; 
  font-family:georgia, "times new roman", serif;
  }
#vertical li {
  float:left; 
  border:0.2em solid #eee;
  margin:0.1em;
  }
#vertical li a, #vertical li a:visited {
  text-decoration:none; 
  color:#000; 
  display:block; 
  width:1.5em; 
  height:1.5em; 
  border-top:0.1em solid #000; 
  height:auto;
  }
#vertical li a em {
  font-style:normal; 
  display:block; 
  text-align:center; 
  background:#fff; 
  border-left:0.1em solid #000; 
  border-right:0.1em solid #000;
  }
#vertical li a em.nd {
  border-bottom:0.1em solid #000;
  }
#vertical li a:hover {
  background:#eee;
  }
#vertical li a:hover em {
  background:#eee; 
  color:#800;
  }