Before Level 2, nested grid items couldn't easily align with the parent's grid lines. Subgrid allows a child element to inherit the tracks (rows or columns) of its parent [1]. This is essential for creating complex, perfectly aligned layouts like card components where headers and footers match up across different columns.
In the technical world, refers to the second iteration of the CSS Grid Layout specification, primarily known for introducing the Subgrid feature. GRID 2
Beyond subgrid, Level 2 continues to refine how browsers handle track sizing and item placement [1]. It helps developers avoid "source ordering" hacks that can ruin web accessibility, ensuring the visual layout doesn't break the logical flow for screen readers. Before Level 2, nested grid items couldn't easily