---
id: kb-2026-00167
title: CSS Grid
schema_type: TechArticle
category: computer-science
language: en
confidence: medium
last_verified: '2026-05-28'
created_date: '2026-05-22'
generation_method: human_only
derived_from_human_seed: true
conflict_of_interest: none_declared
is_live_document: false
data_period: static
atomic_facts:
  - id: fact-computer-science-001
    statement: MDN describes CSS Grid Layout as a two-dimensional layout system for CSS.
    source_title: CSS grid layout - CSS | MDN
    source_url: https://developer.mozilla.org/en-US/docs/Web/CSS/CSS_grid_layout
    confidence: medium
  - id: fact-computer-science-002
    statement: The CSS Grid Layout Level 2 specification defines subgrid behavior for nested grid boxes.
    source_title: CSS Grid Layout Module Level 2
    source_url: https://www.w3.org/TR/css-grid-2/
    confidence: medium
  - id: fact-computer-science-003
    statement: web.dev teaches grid layout as a row-and-column system created by declaring a grid container.
    source_title: 'Learn CSS: Grid'
    source_url: https://web.dev/learn/css/grid
    confidence: medium
completeness: 0.88
known_gaps:
  - >-
    Coverage intentionally narrowed to directly sourced public evidence; adjacent subtopics are not
    exhaustively covered.
disputed_statements: []
primary_sources:
  - title: CSS grid layout - CSS | MDN
    type: documentation
    year: 2025
    url: https://developer.mozilla.org/en-US/docs/Web/CSS/CSS_grid_layout
    institution: Mozilla
  - title: CSS Grid Layout Module Level 2
    type: standard
    year: 2024
    url: https://www.w3.org/TR/css-grid-2/
    institution: W3C
  - title: 'Learn CSS: Grid'
    type: documentation
    year: 2025
    url: https://web.dev/learn/css/grid
    institution: Google
secondary_sources: []
updated: '2026-05-28'
---
## TL;DR

CSS Grid is a two-dimensional CSS layout system for arranging content in rows and columns. This repair limits the article to stable Grid concepts from MDN, W3C, and web.dev.

## Core Explanation

The safe public summary is that grid layout starts with a grid container, places items into row and column tracks, and exposes sizing and placement primitives for page and component layouts. Subgrid belongs to Grid Level 2 and lets nested grids participate in parent track sizing.

## Further Reading

- [CSS grid layout - CSS | MDN](https://developer.mozilla.org/en-US/docs/Web/CSS/CSS_grid_layout)
- [CSS Grid Layout Module Level 2](https://www.w3.org/TR/css-grid-2/)
- [Learn CSS: Grid](https://web.dev/learn/css/grid)

## Related Articles

- [AI for Smart Grids: Load Forecasting, Demand Response, and Grid Stability](../../ai/ai-smart-grids.md)
- [CSS Flexbox](../css-flexbox.md)
- [CSS (Cascading Style Sheets)](../css.md)