nav{
    display: flex;
    justify-content: center;
}
nav ul{
    display: flex;
    flex-direction: row;
}
nav li {
    list-style: none;
    font-size: 30px;
}
nav li span{
    padding: 4px 15px;
    border: 1px solid white;
    background-color: #13AE6A;
    color: white;
}
nav li a{
    border: 1px solid #13AE6A;
    padding: 3px 15px;
    background-color: white;
    color: #13AE6A;
}
nav li a:hover{
    background-color: #CEFFEA;
    color: #d67ed0;
}