body {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    margin: 0;
    padding: 0;
    background-color: #f9f9f9;
    color: #333;
}


main {
    padding: 20px;
    max-width: 800px;
    margin: 0 auto;
    background: white;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

h1, h2, h3 {
    color: black;
}

p {
    margin: 10px 0;
}

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

footer {
    text-align: center;
    padding: 10px;
    background-color: #f1f1f1;
    margin-top: 20px;
    font-size: 0.9em;
}