some more config, want to turn waybar into simple battery bar

modules/niri/swayosd.css.nix

@@ -0,0 +1,30 @@
+{ config, ... }: let
+    background = config.theme.overlay;
+    muted = config.theme.muted;
+    font = config.theme.text;
+in {
+    style = ''
+        window#osd {
+            border-radius: 8px;
+            border: none;
+            background: ${background};
+        }
+
+        image,
+        label {
+            color: ${font};
+        }
+
+        progressbar {
+            background: ${muted};
+        }
+
+        progress:disabled {
+            background: ${font};
+        }
+
+        progress {
+            background: ${font};
+        }
+    '';
+}