waybar: Highlight battery status when critical

modules/home/services/waybar.nix

@@ -95,10 +95,7 @@
             "󰂂"
             "󰁹"
           ];
-          states = {
+          states.critical = 10;
-            critical = 5;
-            warning = 15;
-          };
         };
       };
 
@@ -135,6 +132,10 @@
           color: @theme_selected_fg_color;
           font-weight: bold;
         }
+
+        #battery.critical {
+          color: @error_color;
+        }
       '';
     };
   };