What is the difference between Flexbox and Grid in CSS?

Flexbox is designed for one-dimensional layouts (row or column). It is well suited for aligning elements within a container and distributing space between them.

Grid is designed for two-dimensional layouts (rows and columns simultaneously). It provides more powerful capabilities for creating complex grid structures and arranging content.

Comparison of main differences:

Characteristic	Flexbox	Grid
Layout dimension	One-dimensional (row or column)	Two-dimensional (rows and columns)
Main axis	main-axis (default horizontal)	grid-template-columns, grid-template-rows
Cross axis	cross-axis (default vertical)	Has no direct analogue
Control over elements	Flexible alignment and space distribution	Positioning elements within grid cells
Used for	Navigation panels, cards, aligning elements in a row/column	Main page layout, complex grids, image galleries
Layout complexity	Simple to medium	Any complexity

Example of using Flexbox to center an element on both axes:

.container {
  display: flex; /* Enable Flexbox */
  justify-content: center; /* Align along main axis (horizontal) */
  align-items: center; /* Align along cross axis (vertical) */
  height: 100vh; /* Take up full viewport height */
}

.item {
  /* Style the element */
}

Example of using Grid to create a 3x2 grid:

.container {
  display: grid; /* Enable Grid */
  grid-template-columns: repeat(3, 1fr); /* 3 columns of equal width */
  grid-template-rows: repeat(2, 100px); /* 2 rows of 100px height */
  gap: 10px; /* Gap between cells */
}

.item {
  /* Style the element */
}

Ultimately, the choice between Flexbox and Grid depends on the specific layout task. They are often used together to achieve the desired result. Use Grid for the overall page layout, and Flexbox for positioning elements within Grid cells or individual blocks.