a {
  color: #555;
  text-decoration: none;
}

a:hover {
  color: #333;
}

ul {
  list-style: none;
  margin: 10px 0px 0px 0px;        
}

li {
  margin-right: 10px;
  padding: 5px;
  background-color: #ddd;
  border: 1px solid #999;
  width: 190px;
  float: left;
  text-align:center; 
  margin-top:0px;
}

li:hover {
  background-color: #ccc;
}