body {
    font-family: Arial, sans-serif;
    text-align: center;
    margin: 0;
    padding: 0;
}

header {
    background-color: #007BFF;
    color: white;
    padding: 15px;
}

main {
    margin: 20px;
}

footer {
    margin-top: 20px;
    padding: 10px;
    background-color: #f1f1f1;
}

a {
    text-decoration: none;
    color: #007BFF;
    margin: 10px;
}

.download-btn {
    display: inline-block;
    margin: 20px;
    padding: 10px 20px;
    background-color: #28a745;
    color: white;
    border-radius: 5px;
    text-decoration: none;
}