Curious about the design behind mastercard.us? SiteFontCheck scanned their live CSS architecture and identified 3 unique font families. The website relies heavily on <mccom, sofiasans, arial, sans-serif> for its main text elements, paired with <markoffcformc, arial, helvetica, sans-serif> and <arial, helvetica, sans-serif> as fallback options. Below is the precise map of font sizes, weights, and text elements used across their site.