.Grid_Page {
  display: block; 
}

/* Desktop-specific: apply grid */
@media (min-width: 800px) {
  .Grid_Page {
    display: grid;
    grid-template-columns: 1fr 45rem 1fr; /* Desktop-specific: apply grid */
    grid-template-rows: auto;
    grid-template-areas: "Page_Column_1 Page_Column_2 Page_Column_3";
  }
}

    .Page_Column_1 {
    grid-area: Page_Column_1;
  }
  
    .Page_Column_2 {
    grid-area: Page_Column_2; 
  }

  .Page_Column_3 {
    grid-area: Page_Column_3;
  }