.header-content nav {
    display: inline-block;
}

    .header-content nav ul {
        list-style-type: none;
        padding: 0;
        display: flex;
        align-items: center;
        justify-content: center;
        align-content: center;
        flex-wrap: wrap;
    }

@media (min-width: 200px) {
    .header-content {
       margin-left:30px;
    }
    .header-content nav ul {      
    }
}

@media (min-width: 550px) {
    .header-content {
        margin-left: inherit;
        align-items: center;
    }
    .header-content nav ul {      
    }
}

.header-content nav ul li {
    display: inline;
    margin-right: 10px;
}

    .header-content nav ul li a {
        color: white;
        text-decoration: none;
    }

        .header-content nav ul li a:hover {
            text-decoration: underline;
        }