A super rough guide to approximating font stacks and fallback fonts.
font-family: "Open Sans", "Segoe UI", Tahoma, sans-serif;
font-family: "Open Sans", "Arial Black", sans-serif;
font-family: "Open Sans Condensed", Impact, "Franklin Gothic Bold", sans-serif;
font-family: "Lato", "Trebuchet MS", sans-serif;
font-family: "Arimo", Arial, sans-serif;
font-family: "Roboto", "Franklin Gothic Medium", Tahoma, sans-serif;
font-family: "Roboto Condensed", Impact, "Franklin Gothic Bold", sans-serif;
font-family: "Oswald", Impact, "Franklin Gothic Bold", sans-serif;