The code below produced the above display
#menu li {
list-style-type: none;
width: 7em;
text-align: center;
margin-left: -2.5em;
}
#menu a {
text-decoration: none;
color: black;
display: block;
background-color: #EEEEFF;
box-shadow: 5px 5px 5px gray;
margin-bottom: 2px;
}
#menu a:hover {
background-color: #DDDDEE;
box-shadow: 3px 3px 3px gray;
border: none;
}