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

header {
    background: #333;
    color: #fff;
    padding: 1em 0;
    text-align: center;
}

nav {
    background: #444;
    color: #fff;
    padding: 0.5em;
    text-align: center;
}

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

nav ul li {
    display: inline;
    margin: 0 1em;
}

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

section {
    padding: 2em;
    margin: 1em;
}

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

/* Responsive Styles */
@media (max-width: 768px) {
    nav ul li {
        display: block;
        margin: 0.5em 0;
    }

    section {
        padding: 1em;
        margin: 0.5em;
    }
}

@media (max-width: 480px) {
    header {
        padding: 0.5em 0;
    }

    nav {
        padding: 0.5em;
    }

    footer {
        padding: 0.5em 0;
    }
}