@media (max-width: 768px) {
  .g1, .g2, ..., .g12 {
    grid-column: span 12; /* stack vertically on small screens */
  }
}

@media (max-width: 1550px) {
    .jump-menu {
      transform: translateX(-100%);
    }

    .jump-menu.open {
      transform: translateX(0);
    }

    .menu-toggle {
      display: block;
    }
}