body {
    font-family: Arial, sans-serif;
    background-color: #f0f0f0;
}

.header {
    background-color: #333;
    color: #fff;
    padding: 20px;
    text-align: center;
}

.nav {
    background-color: #444;
    padding: 10px;
    text-align: center;
}

.nav ul {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: space-between;
}

.nav li {
    margin-right: 20px;
}

.nav a {
    color: #fff;
    text-decoration: none;
}

.nav a:hover {
    color: #ccc;
}

.content {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 20px;
}