What is CSS Grid?
A two-dimensional CSS layout system for creating complex grid-based designs with rows and columns.
CSS Grid handles two-dimensional layouts (rows AND columns simultaneously). Key properties: display: grid, grid-template-columns/rows (define track sizes), gap, grid-area (name regions), and grid-template-areas (visual layout definition).
Grid excels at page-level layouts, dashboards, image galleries, and magazine-style designs. It works with Flexbox — use Grid for overall page structure and Flexbox for component-level alignment. Features like auto-fill, minmax(), and fr units enable responsive grids without media queries.