.container {
  display: grid | inline-grid;
}
 
.container {
  grid-template-columns: <track-size> ... | <line-name> <track-size> ...;
  grid-template-rows: <track-size> ... | <line-name> <track-size> ...;
}

.container {
  grid-template-rows: [row1-start] 25% [row1-end row2-start] 25% [row2-end];
}