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

header {
    background-color: #4CAF50;
    color: #fff;
    text-align: center;
    padding: 1rem;
}

main {
    padding: 2rem;
}

button {
    display: inline-block;
    color: #fff;
    background-color: #333;
    padding: 0.5rem 1rem;
    margin: 1rem 0;
    border: none;
    cursor: pointer;
}

button:hover {
    background-color: #4CAF50;
}

footer {
    background-color: #f4f4f4;
    text-align: center;
    padding: 1rem;
    margin-top: 1rem;
    border-top: 1px solid #ddd;
}