The article explains how to replace rigid pixel-based fonts with relative units rem and vw to build responsive, accessible typography: set a clear root/body base size, use rem for a consistent heading hierarchy, apply vw so body text scales with viewport, and keep scaling smooth and consistent; a news site example shows this yields legible, harmonious text across phones, desktops, and large screens.
Practical guide to CSS relative units: em scales with the parent’s font size for proportional text/spacing; rem scales to the root (HTML) for consistent, app‑wide sizing; percentages size elements by parent dimensions for flexible, responsive layouts. Includes examples and best practices: set global type in rem, use % for layout, avoid mixing units, and test across browsers/devices.
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