body {
    margin: 0;
    background: #fff;
    color: #222;
    font-family: Helvetica, Arial, sans-serif;
    font-size: 16px;
    line-height: 1.5;
}

main {
    max-width: 40rem;
    margin: 0 auto;
    padding: 2rem 1.25rem 3rem;
}

h1 {
    font-size: 1.6rem;
    margin: 0 0 1.25rem;
}

h2 {
    font-size: 1.1rem;
    margin: 1.75rem 0 0.5rem;
}

p {
    margin: 0 0 1rem;
}

a {
    color: #111;
}

.back {
    margin-bottom: 1.5rem;
}

.nav {
    margin-top: 2rem;
}