@Override
    public void start(Stage stage) {
        stage.initStyle(javafx.stage.StageStyle.TRANSPARENT);
        stage.setTitle("Vypers Launcher");

        StackPane root = new StackPane();
        Scene scene = new Scene(root, 820, 520);
        scene.setFill(Color.TRANSPARENT);

        StackPane windowContent = new StackPane();
        windowContent.setBackground(makeBackground("/background.png", Color.web("#0e0e14")));
        windowContent.setBorder(new Border(new BorderStroke(
                Color.web("#ffffff22"),
                BorderStrokeStyle.SOLID,
                new CornerRadii(20),
                new BorderWidths(1)
        )));

        Node socials = socialBar();
        StackPane.setAlignment(socials, Pos.TOP_LEFT);
        StackPane.setMargin(socials, new Insets(12, 0, 0, 12));

        Node closeBtn = closeButton(stage, root);
        StackPane.setAlignment(closeBtn, Pos.TOP_RIGHT);
        StackPane.setMargin(closeBtn, new Insets(12, 12, 0, 0));

        VBox card = buildGlassCard(root);
        addIntroSplash(card);

        windowContent.getChildren().addAll(socials, closeBtn, card);

        Region logo = makeLogo(root);
        StackPane.setAlignment(logo, Pos.TOP_CENTER);
        logo.setTranslateY(-220);
        logo.setViewOrder(-1);
        addFloaty(logo);

        root.getChildren().addAll(windowContent, logo);

        stage.setScene(scene);
        stage.show();

        root.setOpacity(0);
        root.setScaleX(0.96);
        root.setScaleY(0.96);
        FadeTransition f = new FadeTransition(Duration.seconds(0.6), root);
        f.setFromValue(0);
        f.setToValue(1);
        ScaleTransition s = new ScaleTransition(Duration.seconds(0.6), root);
        s.setToX(1.0);
        s.setToY(1.0);
        ParallelTransition pt = new ParallelTransition(f, s);
        pt.play();
    }

    private VBox buildGlassCard(StackPane root) {
        VBox card = new VBox(12);
        card.setAlignment(Pos.CENTER);
        card.setPadding(new Insets(14, 24, 14, 24));
        card.setMaxWidth(360);
        card.setMinWidth(320);

        card.setBackground(new Background(new BackgroundFill(
                Color.web("#00000066"), new CornerRadii(20), Insets.EMPTY)));
        card.setBorder(new Border(new BorderStroke(
                Color.web("#ffffff22"), BorderStrokeStyle.SOLID,
                new CornerRadii(20), new BorderWidths(1))));
        card.setEffect(new DropShadow(18, Color.web("#00000066")));

        VBox fields = new VBox(8);
        fields.setAlignment(Pos.CENTER);

        Label userLabel = new Label("Felhasználónév");
        userLabel.setTextFill(Color.web("#eeeeee"));
        userLabel.setFont(Font.font(14));

        TextField usernameField = inputField();

        Label passLabel = new Label("Jelszó");
        passLabel.setTextFill(Color.web("#eeeeee"));
        passLabel.setFont(Font.font(14));

        PasswordField passwordField = passwordField();

        fields.getChildren().addAll(userLabel, usernameField, passLabel, passwordField);

        HBox options = new HBox(10);
        options.setAlignment(Pos.CENTER);
        CheckBox remember = new CheckBox("Emlékezz rám");
        remember.setTextFill(Color.web("#eeeeee"));
        options.getChildren().addAll(remember);

        Button loginButton = redPrimaryButton("BEJELENTKEZÉS");
        loginButton.setMaxWidth(Double.MAX_VALUE);
        loginButton.setFont(Font.font("System", FontWeight.BOLD, 14));
        loginButton.setPadding(new Insets(10, 16, 10, 16));
        loginButton.setDefaultButton(true);

        passwordField.setOnKeyPressed(e -> {
            if (e.getCode() == KeyCode.ENTER)
                loginButton.fire();
        });

        VBox.setMargin(fields, new Insets(-40, 0, 0, 0));
        VBox.setMargin(options, new Insets(5, 0, 0, 0));
        VBox.setMargin(loginButton, new Insets(5, 0, 0, 0));

        card.getChildren().addAll(fields, options, loginButton);

        return card;
    }

    private Region makeLogo(StackPane root) {
        try {
            ImageView iv = new ImageView(new Image(
                    getClass().getResource("/logo.png").toExternalForm()));
            iv.setPreserveRatio(true);
            iv.setFitWidth(260);

            iv.setOpacity(0.0);
            FadeTransition ft = new FadeTransition(Duration.seconds(0.5), iv);
            ft.setFromValue(0);
            ft.setToValue(1);
            ft.play();

            Pane logoPane = new Pane();
            logoPane.setPrefSize(root.getWidth(), root.getHeight() + 400);
            logoPane.setPickOnBounds(false);

            logoPane.getChildren().add(iv);

            iv.layoutXProperty().bind(logoPane.widthProperty()
                    .subtract(iv.fitWidthProperty()).divide(2));

            iv.setTranslateY(-195);

            logoPane.setViewOrder(-1);

            return logoPane;
        } catch (Exception e) {
            Label title = new Label("Vypers Launcher");
            title.setFont(Font.font("Verdana", FontWeight.BOLD, 28));
            title.setTextFill(Color.web("#ffffffcc"));
            return title;
        }
    }