body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    line-height: 1.6;
}

header {
    background-color: #333;
    color: white;
    padding: 1rem;
    text-align: center;
}

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

nav ul li {
    margin: 0 10px;
}

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

.content-section {
    padding: 2rem;
    max-width: 800px;
    margin: auto;
}

footer {
    background-color: #333;
    color: white;
    text-align: center;
    padding: 1rem;
    position: fixed;
    width: 100%;
    bottom: 0;
}

@media (max-width: 600px) {
    nav ul {
        flex-direction: column;
    }

    nav ul li {
        margin: 5px 0;
    }
}