body {
    margin: 0;
    padding: 0;
    background: #fff;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    color: #333;
}

main {
    max-width: 640px;
    margin: 0 auto;
    padding: 4rem 1rem;
    text-align: center;
}

h1 {
    font-size: 1.75rem;
    margin-bottom: 0.5rem;
}

p {
    font-size: 1.125rem;
    color: #666;
}