Adding custom css to WCM core placeholder
Hi,
I have been trying to use the placeholder that has been uced in core components. Like using data sly call of templates.html in core and making use of it as place holder. But I am not able to apply my css styles by adding the custom css class as given in that templates.html
The current look is default one:

I am expecting something a placholder like this:

All suggestions are welcomed.

