/* Ad layout. Phones show the header unit above the content. Wide screens add a right rail, and very wide screens add a left rail.
   Ads sit beside the calculator, never between its inputs and buttons. */
.page-grid { display: grid; grid-template-columns: minmax(0, 1fr); gap: 24px; }
.page-main { min-width: 0; }
.side-rail { display: none; }
.slot-top { margin: 0 0 8px; }
@media (min-width: 1024px) {
  .page-grid { grid-template-columns: minmax(0, 1fr) 300px; }
  .side-right { display: block; position: sticky; top: 96px; align-self: start; }
  .side-right .slot + .slot { margin-top: 24px; }
}
@media (min-width: 1280px) {
  .page-grid { grid-template-columns: 160px minmax(0, 1fr) 300px; }
  .side-left { display: block; position: sticky; top: 96px; align-self: start; }
}