dijit-themes/flat/dgrid/flat.css

Dojo 1.x modern themes

.flat {
  import: '../../dgrid/css/skins/skin';
}
.flat .dgrid-cell-padding {
  padding: 5px 10px;
}
.flat .dgrid-header .dgrid-cell {
  border-bottom-width: 2px;
}
.flat .dgrid-selected {
  border: 1px solid #007ac2;
}