body {
font-family: Arial, sans-serif;
margin: 0;
background: #f5f5f5;
color: #222;
}
header {
text-align: center;
padding: 20px;
background: white;
}
main {
padding: 20px;
}
button {
display: block;
margin: 10px 0;
padding: 10px;
width: 100%;
}
footer {
text-align: center;
padding: 20px;
background: white;
}