body {
    font-family: sans-serif;
    max-width: 40rem;
    margin: 4rem auto;
    padding: 0 1rem;
    color: #222;
}

h1 {
    color: #2a6041;
    border-bottom: 3px solid #2a6041;
    padding-bottom: 0.3rem;
}

code {
    background: #eee;
    padding: 0.1rem 0.3rem;
    border-radius: 3px;
}