body {
    font-family: 'Arial', sans-serif;
    background-color: #f0f0f0;
    color: #333;
    text-align: center;
    margin: 0;
    padding: 0;
}
header {
    background-color: #ffcc00;
    padding: 2rem 1rem;
}
header h1 {
    margin: 0;
    font-size: 2.5rem;
}
main {
    padding: 2rem;
}
button {
    padding: 0.5rem 1rem;
    font-size: 1rem;
    cursor: pointer;
    background-color: #333;
    color: #fff;
    border: none;
    border-radius: 5px;
}
button:hover {
    background-color: #555;
}
footer {
    background-color: #222;
    color: #fff;
    padding: 1rem;
}