What is line height and why does it matter?
Line height (also called leading) is the vertical space between lines of text.
Improves readability: Too tight = crowded. Too loose = disjointed.
Good rule: 1.4–1.6× the font size (e.g., 16px text → ~24px line height).
Helps scannability: Especially on long-form content or small screens.
For visual hierarchy tips, explore our Typography Design Guide.