Body text use the font Hind:
Headlines use the font Georgia.
You can use breakpoint infixes to set font sizes at different breakpoints.
.font-size-sm-base
.font-size-sm-sm
.font-size-sm-lg
.font-size-md-base
.font-size-md-sm
.font-size-md-lg
.font-size-lg-base
.font-size-lg-sm
.font-size-lg-lg
.font-size-xl-base
.font-size-xl-sm
.font-size-xl-lg
You can use the class .lh-0
to set the line height of an element to zero.