body {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    margin: 20px;
    padding: 0;
    background-color: #f8f9fa;
    color: #333;
}
h1, h2, h3, h4 {
    color: #007bff;
}
h1 {
    text-align: center;
}
section {
    margin-bottom: 20px;
    padding: 15px;
    border: 1px solid #ccc;
    background-color: #fff;
    border-radius: 5px;
}
ul {
    padding-left: 20px;
}
footer {
    text-align: center;
    margin-top: 40px;
    font-size: 0.9em;
    color: #777;
}