Fixes

app/src/main/java/io/xpipe/app/core/AppTheme.java

@@ -43,6 +43,7 @@ public class AppTheme {
 
     public static void initThemeHandlers(Stage stage) {
         Runnable r = () -> {
+            stage.getScene().getRoot().getStyleClass().add(OsType.getLocal().getId());
             if (AppPrefs.get() == null) {
                 var def = Theme.getDefaultLightTheme();
                 stage.getScene().getRoot().getStyleClass().add(def.getCssId());

app/src/main/java/io/xpipe/app/core/window/ModifiedStage.java

@@ -66,8 +66,8 @@ public class ModifiedStage extends Stage {
             }
             case OsType.MacOs macOs -> {
                 var ctrl = new NativeMacOsWindowControl(stage);
-                ctrl.setWindowDarkMode(AppPrefs.get().theme.getValue().isDark());
                 var seamlessFrame = !AppPrefs.get().performanceMode().get() && mergeFrame();
+                ctrl.setAppearance(seamlessFrame, AppPrefs.get().theme.getValue().isDark());
                 stage.getScene().getRoot().pseudoClassStateChanged(PseudoClass.getPseudoClass("seamless-frame"), seamlessFrame);
                 stage.getScene().getRoot().pseudoClassStateChanged(PseudoClass.getPseudoClass("separate-frame"), !seamlessFrame);
             }

app/src/main/java/io/xpipe/app/core/window/NativeMacOsWindowControl.java

@@ -28,7 +28,7 @@ public class NativeMacOsWindowControl {
         this.nsWindow = (long) nativeHandle;
     }
 
-    public void setWindowDarkMode(boolean darkMode) {
+    public void setAppearance(boolean seamlessFrame, boolean darkMode) {
         if (!ModuleHelper.isImage()) {
             return;
         }

app/src/main/resources/io/xpipe/app/resources/style/style.css

@@ -9,7 +9,7 @@
     -fx-background-color: transparent;
 }
 
-.root:seamless-frame {
+.root.macos:seamless-frame {
     -fx-padding: 0 0 27 0;
 }
 

core/src/main/java/io/xpipe/core/process/OsType.java

@@ -46,6 +46,8 @@ public interface OsType {
 
     sealed interface Local extends OsType permits OsType.Windows, OsType.Linux, OsType.MacOs {
 
+        String getId();
+
         default Any toAny() {
             return (Any) this;
         }
@@ -131,6 +133,11 @@ public interface OsType {
                 return "Windows";
             }
         }
+
+        @Override
+        public String getId() {
+            return "windows";
+        }
     }
 
     class Unix implements OsType {
@@ -197,6 +204,11 @@ public interface OsType {
 
     final class Linux extends Unix implements OsType, Local, Any {
 
+        @Override
+        public String getId() {
+            return "linux";
+        }
+
         @Override
         public String determineOperatingSystemName(ShellControl pc) throws Exception {
             try (CommandControl c = pc.command("lsb_release -a").start()) {
@@ -223,6 +235,11 @@ public interface OsType {
 
     final class MacOs implements OsType, Local, Any {
 
+        @Override
+        public String getId() {
+            return "macos";
+        }
+
         @Override
         public String makeFileSystemCompatible(String name) {
             // Technically the backslash is supported, but it causes all kinds of troubles, so we also exclude it