html {
    font-family: Cambria,Georgia,"Times New Roman",Times,serif;
    font-size: 20px;
    line-height: 1.5;
}
h1,h2,h3,h4,h5,h6 {
    font-family: sans-serif;
    line-height: 1.2;
}
body {
    max-width: 740px;
    padding: 15px;
    position:relative;
    margin: 0 auto;
}
@media (max-width: 767px) {
    html {
        font-size: 18px;
    }
}