.nav {
    backgraound-color:white;
}

.nav ul{
    list-style: none;
    padding: 0;
}

.nav li{
    display: inline-block;
}

.nav li a {
    display: block;
    width: 150px;
    border: 5px solid gray;
    text-align: center;
    text-decoration: none;
    color: forestgreen;
    padding: .2em 0 ;
    font-size: 15px;
}

.nav li a:hover{
    color: firebrick;
}