#button {
  width: 12em;
  border-right: 1px solid #000;
  padding: 0 0 1em 0;
  margin-bottom: 1em;
  font-family: 'Trebuchet MS', 'Lucida Grande',
    Verdana, Lucida, Geneva, Helvetica, 
    Arial, sans-serif;
  background-color: #90bade;
  color: #333;
  }

#button ul {
    list-style: none;
    margin: 0;
    padding: 0;
    border: none;
    }
    
#button li {
    border-bottom: 1px solid #90bade;
    margin: 0;
    }
#button li a {
    display: block;
    padding: 5px 5px 5px 0.5em;
    border-left: 10px solid #1958b7;
    border-right: 10px solid #508fc4;
    background-color: #2175bc;
    color: #fff;
    text-decoration: none;
    width: 100%;
    }

  html>body #button li a {
    width: auto;
    }

 #button li a:hover {
    border-left: 10px solid #1c64d1;
    border-right: 10px solid #5ba3e0;
    background-color: #2586d7;
    color: #fff;
    }