.ag-theme-material .ag-cell {
 line-height: 51px !important;
}
.ag-cell-edit-input {
  line-height: 51px !important;
  height: 51px !important;
}
#myGrid {
  <!-- height: 538px !important; -->
}
.ag-theme-material .ag-cell[col-id="btns"] {
  line-height: calc(51px - 3px) !important;
  padding: 0px !important;
  text-align: center !important;
}