What Is Font Family?
A font family is the complete set of related styles built from one typeface — regular, bold, italic, light, condensed, and so on. All members share the same core design but differ in weight, width, or slant, so they work together harmoniously in a single layout.
A well-built family gives designers range without clashing: you can set body text in the regular weight, headings in bold, and captions in the light italic, and everything still feels like one voice.
In CSS, `font-family` is also the property that tells the browser which typeface to use, often with fallbacks (e.g. `font-family: Georgia, serif`) so text still renders if the first choice is unavailable.