Using UI System Fonts In Web Design: A Quick Practical Guide:

Microsoft restarted conversations about system UI fonts with its original Windows Phone design language, which relied heavily on typography in general, and on a font named Segoe in particular. No wonder that the idea of using those fonts is spreading through the web world as well. Whether you want your website to feel more like an app, to draw clearer lines between the content and user interface, or to use modern, beautiful fonts with zero latency, you might be interested in using system UI fonts on your website. But it’s not as easy as it could be. That’s because the CSS support is curiously…