grid-template-areas
from
Grid Layout
各
Grid Area
に名前をつける
code:e.g.css
grid-template-areas:
"areaA areaB"
"areaA areaC";
https://css-tricks.com/snippets/css/complete-guide-grid/#aa-grid-template-areas
https://www.builder.io/blog/css-grid-template-areas