What problem does it solve? Choosing and implementing web typography involves many interdependent decisions — typeface selection, pairing, sizing, line length, line height, hierarchy, and font-loading performance — and getting any of them wrong makes text hard to read or slow to render. ## Core Features & Use Cases - Typeface Evaluation and Pairing: Apply technical, structural, and practical quality checks to candidate fonts, then pair faces using structural contrast, superfamilies, or same-designer strategies. - Typographic Measurement and Hierarchy: Set body size (16px+), measure (45-75ch), line height (1.4-1.8), and modular heading scales with copy-ready CSS patterns. - Responsive Type and Font Performance: Implement fluid typography with clamp(), font-display: swap, preloading, WOFF2 subsetting, and a 200KB payload budget to avoid FOIT/FOUT. - Use Case: When a user says "the text on my landing page is hard to read", run the 10-row Quick Diagnostic to score the page, identify failing rows (e.g., sub-16px body, no measure cap), and produce the corrected CSS. ## Quick Start Review the typography on my page and fix the font sizes, line length, and line height so the body text is comfortable to read.