.se-grid {
  display: grid;
  gap: 20px;
}
.se-grid.columns-2 { grid-template-columns: repeat(2, 1fr); }
.se-grid.columns-3 { grid-template-columns: repeat(3, 1fr); }
.se-grid.columns-4 { grid-template-columns: repeat(4, 1fr); }
.se-sticky { position: sticky; }