body{
    font-family:-apple-system,BlinkMacSystemFont,system-ui;
    line-height:1.7;
    font-size:20px;
    max-width:720px;
    margin:80px auto;
    padding:0 20px;
    color:#111;
}

a{
    color:#111;
    text-decoration:none;
}

a:hover{
    text-decoration:underline;
}

.back{
    font-size:14px;
    margin-bottom:40px;
    display:inline-block;
}

h1{
    font-size:40px;
    margin-bottom:10px;
}

h2{
    font-size:28px;
    margin-top:40px;
    margin-bottom:16px;
}

h3{
    font-size:22px;
    margin-top:20px;
    margin-bottom:12px;
}

p{
    margin-bottom:18px;
}

ul{
    margin-bottom:18px;
    padding-left:20px;
}

strong{
    font-weight:600;
}

.nav{
    margin-left:24px;
}

.nav p{
    margin-bottom:8px;
}