Explore the transformative world of variable fonts and their impact on web design in this conference talk from CSSconf EU 2019. Discover how variable fonts, when combined with CSS custom properties and calculations, revolutionize typography and user experience. Learn to create dynamic, fluidly scaling typography that adapts to screen size and user context. Delve into the performance and design implications of this evolution in type design, and understand its potential for enhancing design systems and accessibility. Gain insights into topics such as CSS locks, dark mode implementation, and progressive font enrichment. Examine real-world applications through case studies of Georgia Gov and IBM websites.