.nav {
    text-align: center;
    /*background: white; /* Menue Background*/
    
}

    .nav a {
        font-family: sans-serif;
        font-weight: 600;
        font-size: 1.0rem;       
    }

.nav a:hover,
.nav a.active {
        background: #d9db19; /*  #d9db19  menue background*/
        color: red; /* #042ffb*/
        }