body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
}
header {
    background: #222;
    color: white;
}
nav ul {
    list-style: none;
    display: flex;
    background: #444;
    padding: 0;
}
nav ul li {
    margin: 0;
}
nav ul li a {
    display: block;
    padding: 10px 15px;
    color: white;
    text-decoration: none;
}
.language-selector {
    background: #111;
    text-align: right;
    padding: 0.5em 1em;
}
.language-selector a {
    color: white;
    text-decoration: none;
    margin-left: 0.5em;
    font-size: 1.2em;
}