body {
    font-family: Arial, sans-serif;
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
    background-color: #f4f4f4;
}
h1, h2, h3 {
    color: #2C3E50;
}
a {
    color: #2980B9;
    text-decoration: none;
}
a:hover {
    text-decoration: underline;
}
nav ul {
    list-style-type: none;
    padding: 0;
}
nav ul li {
    display: inline;
    margin-right: 15px;
}
footer {
    margin-top: 30px;
    text-align: center;
    font-size: 0.9em;
    color: #666;
}