body {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f4f4f4;
}

header, nav, footer {
    padding: 20px 0;
    text-align: center;
}

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

nav ul li {
    display: inline;
}

nav ul li a {
    padding: 15px 20px;
    text-decoration: none;
    color: #fff;
    background-color: #333;
}

nav ul li a:hover {
    background-color: #555;
}

footer {
    background-color: #333;
    color: #fff;
}