Webkit documentation here: h t t p s : / /webkit.org/blog/3709/using-the-system-font-in-web-content/ states:
Going beyond the system font, iOS has dynamic type behavior, which can provide an additional level of fit and finish to your content. These text styles identify more than simply a particular font family; instead, they represent an entire style, including size and weight. These styles are therefore characterized by values given to the more-general
fontfont: -apple-system-body
font: -apple-system-headline
font: -apple-system-subheadline
font: -apple-system-caption1
font: -apple-system-caption2
font: -apple-system-footnote
font: -apple-system-short-body
font: -apple-system-short-headline
font: -apple-system-short-subheadline
font: -apple-system-short-caption1
font: -apple-system-short-footnote
font: -apple-system-tall-body
But what about UIFontTextStyleTitle1 2, and 3?
