When running my mavenized JavaFX application directly drom eclipse IDE my stylesheet is loaded correctly:

mystage.getScene().getStylesheets().add("/css/main.css");

My folder structur:
 + src/main/java
    - /myapp/Main.java
 + src/main/resources
    - /css/main.css

But after packaging my project via maven to .jar and .jnlp and running it, the stylesheet is not loaded anymore.
Console:
WARNING: com.sun.javafx.css.StyleManager$2 run Resource "null" not found.

The jar folder structure:
 + myapp/Main.class
 + css/main.css

But if I put the main.css to C:\ and then use .add("file:/c:/main.css"); it works fine.

Seem to be a path resolution problem in the StyleManager.