body {
    font-family: Arial, sans-serif;
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
    line-height: 1.6;
    color: #333;
}
header {
    text-align: center;
    border-bottom: 1px solid #ccc;
    padding-bottom: 20px;
}
nav a {
    margin: 0 10px;
    text-decoration: none;
    color: #007bff;
}
nav a:hover {
    text-decoration: underline;
}
h1 {
    font-size: 2em;
}
h2 {
    font-size: 1.5em;
}
ul {
    list-style-type: none;
    padding: 0;
}
ul li {
    margin: 10px 0;
}
footer {
    margin-top: 20px;
    text-align: center;
    color: #777;
}