body {
    font-family: 'Segoe UI', sans-serif;
    background-color: #f4f4f9;
    margin: 0;
    padding: 0;
    color: #333;
}
header {
    background-color: #004aad;
    color: white;
    padding: 20px;
    text-align: center;
}
main {
    padding: 20px;
}
h2 {
    color: #004aad;
}
pre {
    background-color: #eaeaea;
    padding: 10px;
    overflow-x: auto;
}
footer {
    text-align: center;
    padding: 10px;
    background-color: #ddd;
}