ul {
list-style-type:none;
margin:0;
padding:0;
display:flex;
flex-direction: row; flex-direction:column;
}
li {flex-grow:1;}
a {
display:block;
padding:lem;
background-color:green;
text-align:center;
margin-right:0.2em; margin-bottom:0.2em;
text-decoration:none;
color:blue;
}
a:hover {background