What is fluid typography?

Fluid typography is a modern web design approach where font sizes automatically and smoothly scale up or down based on the size of the browser viewport, rather than jumping abruptly between fixed sizes at specific breakpoints the way traditional responsive design typically works. Instead of setting a font size of, say, 16 pixels for mobile and then switching to 24 pixels at a certain screen width using media queries, fluid typography uses CSS techniques, most commonly the clamp function combined with viewport-relative units like vw, to create a smooth, continuous scaling effect where text size gradually grows or shrinks proportionally as the browser window resizes, with no jarring jumps at specific breakpoints. This approach has become popular because it results in text that always looks proportionally appropriate for the current screen size, improving both aesthetics and readability across the huge range of device sizes people now use to browse the web, from small phones to large desktop monitors and everything in between. Fluid typography typically still includes defined minimum and maximum size limits to prevent text from becoming unreadably small on tiny screens or awkwardly oversized on very large displays. It's become a standard best practice in modern responsive web design, particularly since CSS functions like clamp made implementation significantly simpler than earlier workarounds.