This page serves as a web style guide and defines the fonts to use. Some sizes are in rem units, and to understand this it is necessary to know that 1rem is equal to the base font size set in the body of the web page, in this case 16px. Setting the sizes in this way allows to scale all the typography of the web with a simple change in the font size set in the body of the page. The em units are a function of the element’s font size, rather than the base font size. An element with a font size of 24px will have that same value as 1em, and 2 em will equal 48px.

Most line sizes and heights are established based on the Golden Ratio, a design principle to achieve balanced and proportional designs that are aesthetically pleasing. This may no longer be the case if changes have been implemented.