Advanced Grid – Named Areas & Sub‑Grids

Named grid areas make markup readable.

.grid {
  display:grid;
  grid-template-areas:
    "header header header"
    "nav    main   aside"
    "footer footer footer";
}
header { grid-area:header; }
nav    { grid-area:nav; }
main   { grid-area:main; }
aside  { grid-area:aside; }
footer { grid-area:footer; }

Sub‑grid (supported in Chrome 111+, Safari 16+) lets a child grid inherit the parent’s line definitions.

Example: Sub‑grid for a card list

.gallery {
  display:grid;
  grid-template-columns: repeat(auto-fill, minmax(200px,1fr));
  gap:1rem;
}
.card {
  display:grid;
  grid-template-columns: subgrid; /* inherits .gallery cols */
  gap:0.5rem;
}