got rid of box shadows

.config/gtk-3.0/gtk-widgets.css

@@ -96,6 +96,7 @@
 * {
     color: @fg_color;
     background: @bg_color;
+    border-color:@bg_color;
 }
 
 selection,
@@ -156,6 +157,11 @@ menuitem:disabled accelerator {
 }
 
 
+button {
+    border-radius: 0px;
+    box-shadow: none;
+}
+
 button:hover label,
 button:focus label,
 switch:hover slider,