.left {
  grid-column: 1;
}
.left-2 {
  grid-column: 1/ span 2;
}
.center {
  grid-column: 2;
}
.grid-right {
  grid-column: 3;
}
.full_width {
  grid-column: 1 / -1;
  width: 100%;
}
@media (max-width: 768px) {
  .grid-right {
    grid-column: 2;
  }
  .left-2, .center {
    grid-column: 1;
  }
}