body {
    font-family: Arial, sans-serif;
    margin: 40px;
    background: #ffffff;
    color: #222222;
}

header {
    border-bottom: 1px solid #cccccc;
    padding-bottom: 20px;
}

h1 {
    font-size: 40px;
}

nav {
    margin: 20px 0;
}

nav a {
    margin-right: 20px;
    text-decoration: none;
    color: #0066cc;
}

section {
    max-width: 800px;
    line-height: 1.6;
}

footer {
    margin-top: 50px;
    font-size: 14px;
    color: #666666;
}