custom-grid
{
   display: grid;
   grid-template-columns: repeat(1, 1fr);
}

@media screen and (min-width: 744px)
{
   custom-grid
   {
      grid-template-columns: repeat(2, 1fr);
      column-gap: 16px;
   }
}

@media screen and (min-width: 1440px)
{
   custom-grid
   {
      grid-template-columns: repeat(3, 1fr);
      column-gap: 25px;
   }
}