nav {
    background: #222;
    padding: 0;
}

nav ul {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
}

nav li {
    margin: 0;
}

nav a {
    display: block;
    padding: 14px 20px;
    color: white;
    text-decoration: none;
}

nav a:hover {
    background: #444;
}