body {
    font-family:
        -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
        Helvetica, Arial, sans-serif;
    line-height: 1.6;
    max-width: 800px;
    margin: 40px auto;
    padding: 0 20px;
    color: #111;
    background: #fff;
}
h1,
h2 {
    color: #000;
}
h1 {
    font-size: 28px;
    margin-bottom: 10px;
}
h2 {
    margin-top: 30px;
    font-size: 20px;
}
p {
    margin: 10px 0;
}
ul {
    margin: 10px 0 20px 20px;
}