use GridVariant

src/main/java/com/example/application/views/results/ResultsView.java

@@ -14,6 +14,7 @@ import com.vaadin.flow.component.button.Button;
 import com.vaadin.flow.component.dependency.CssImport;
 import com.vaadin.flow.component.grid.ColumnTextAlign;
 import com.vaadin.flow.component.grid.Grid;
+import com.vaadin.flow.component.grid.GridVariant;
 import com.vaadin.flow.component.html.Label;
 import com.vaadin.flow.component.icon.Icon;
 import com.vaadin.flow.component.icon.VaadinIcon;
@@ -101,7 +102,7 @@ public class ResultsView extends SeasonAndMatchdayNavigationView {
     }
 
     private void configureMatchdayLayout() {
-//        getMatchdayHeader().addClassName("big_header"); // add dates
+        getMatchdayHeader().addClassName("big_header"); // add dates
 
         getMatchdayLayout().setPadding(false);
         getMatchdayLayout().add(getMatchdayHeader(), getGrid());
@@ -133,7 +134,9 @@ public class ResultsView extends SeasonAndMatchdayNavigationView {
         getGrid().setWidth("32em");
         getGrid().setHeightByRows(true);
 
-        getGrid().addClassName("my_grid");
+//        getGrid().addClassName("my_grid");
+        getGrid().addThemeVariants(GridVariant.LUMO_NO_BORDER,
+                GridVariant.LUMO_NO_ROW_BORDERS, GridVariant.LUMO_ROW_STRIPES);
     }
 
     private String getResultString(CalculatedMatch match) {

src/main/java/com/example/application/views/table/TableView.java

@@ -12,6 +12,7 @@ import com.example.application.views.main.MainView;
 import com.vaadin.flow.component.dependency.CssImport;
 import com.vaadin.flow.component.grid.ColumnTextAlign;
 import com.vaadin.flow.component.grid.Grid;
+import com.vaadin.flow.component.grid.GridVariant;
 import com.vaadin.flow.component.html.Label;
 import com.vaadin.flow.component.orderedlayout.HorizontalLayout;
 import com.vaadin.flow.function.ValueProvider;
@@ -131,7 +132,10 @@ public class TableView extends SeasonAndMatchdayNavigationView {
 
         getGrid().setWidth("51em");
         getGrid().setHeightByRows(true);
-        getGrid().addClassName("my_grid");
+
+//        getGrid().addClassName("my_grid");
+        getGrid().addThemeVariants(GridVariant.LUMO_NO_BORDER,
+                GridVariant.LUMO_NO_ROW_BORDERS, GridVariant.LUMO_ROW_STRIPES);
     }
 
     private String getResultString(PlayerForTable player) {