.navbar {
    position: sticky;
    top: 0;
    left: 0;
    background: white;
    z-index: 998;
    font-size: 1.5em;

    a {
        background-color: black;
        color: white;
        text-decoration: none;
    }
    a:hover {
        background-color: white;
        color: black;
    }

    span {
        color: black;
    }
}

@media (orientation: portrait) {
    .navbar {
        font-size: 3.5em;
    }
}