body {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    margin: 0;
    padding: 20px;
    background-color: #f4f4f4;
}

h1, h2, h3 {
    color: #333;
}

h1 {
    font-size: 2.5em;
    margin-bottom: 20px;
}

h2 {
    font-size: 2em;
    margin-top: 30px;
    margin-bottom: 10px;
}

h3 {
    font-size: 1.5em;
    margin-top: 20px;
}

p {
    margin: 10px 0;
}

ul {
    margin: 10px 0 10px 20px;
}

footer {
    margin-top: 40px;
    text-align: center;
    font-size: 0.9em;
    color: #666;
}