CSS Grid Layout

1. Grid concepts

   Grid container, tracks, lines, cells and areas.

2. Defining the grid

   grid-template-columns, rows and areas.

3. Placing grid items

   grid-row, grid-column and auto-placement.

4. Track sizing

   fr units, minmax(), auto tracks and the sizing algorithm.

5. Alignment and spacing

   Alignment properties and gaps.

6. Subgrids

   Subgrid track inheritance.

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