javafx - Neon Button

import java.nio.file.Files;
import java.nio.file.Path;

import javafx.application.Application;
import javafx.geometry.Pos;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.effect.Bloom;
import javafx.scene.input.KeyCode;
import javafx.scene.input.KeyCodeCombination;
import javafx.scene.layout.VBox;
import javafx.stage.Stage;

public class Main extends Application {

 public static void main(String[] args) {
  launch(args);
 }
 
 @Override
 public void start(Stage stage) throws Exception {
  Path p = Files.createTempFile("prefix", "suffix");
  p.toFile().deleteOnExit();
  setUserAgentStylesheet(p.toUri().toURL().toString()); // remove default stylesheet
  
  Button b = new Button("Neon button");
  b.setEffect(new Bloom());
   
  VBox root = new VBox(20, b);
  root.setAlignment(Pos.CENTER);
  Scene scene = new Scene(root, 300, 300); 
  stage.setScene(scene);
  scene.getStylesheets().add("style.css");
  stage.getScene().getAccelerators().put(new KeyCodeCombination(KeyCode.ESCAPE), () -> System.exit(0));
  stage.show();
 }
}

.root {
 -fx-background-color: darkblue;
}

.button {
  -fx-font-size:2em;
 -fx-font-family: "Eras Medium ITC";
 -fx-padding:15px 20px;
 -fx-text-alignment: center;
 -fx-border-width: 2px; 
 -fx-border-color: cyan;
 -fx-text-fill:cyan;
 -fx-border-radius: 50%;
 -fx-padding:1em 2em 0.9em 2em;
}

.button:hover {
 -fx-border-color: derive(cyan, -20%);
 -fx-text-fill:derive(cyan, -20%);
}

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