CSS Flexbox vs Grid: Complete Guide & When to Use Each

CSS Flexbox and Grid are powerful layout systems that revolutionized web design. Flexbox excels at one-dimensional layouts (rows or columns) and is ideal for component-level layouts like navigation bars and cards. Grid handles two-dimensional layouts (rows and columns simultaneously) and works best for page-level layouts and complex designs. Key differences include Flexbox being content-first and flow-driven, while Grid is container-first with precise element placement. The guide covers essential properties like flex-direction, justify-content, align-items for Flexbox, and grid-template-areas, subgrid for Grid. Best practice is using Grid for macro-layouts and Flexbox for micro-layouts within components.