body {
    font-family: Arial, sans-serif;
    margin: 20px;
    padding: 20px;
    background-color: #f4f4f4;
}
button {
    padding: 8px 16px;
    background: #28a745;
    color: white;
    border: none;
    cursor: pointer;
}
button:hover {
    background: #218838;
}