body {
    font-family: sans-serif;
    max-width: 700px;
    margin: 2em auto;
    padding: 1em;
    line-height: 1.6;
}
h1 {
    font-size: 2em;
    margin-bottom: 0.5em;
}
.cta {
    margin-top: 2em;
    background: #eee;
    padding: 1em;
    border-radius: 8px;
    text-align: center;
}