gui modification, style, card on_going handling started
	modified:   card_selector.py
	modified:   cards/ability.py
	modified:   cards/card.py
	modified:   game_state.py
	modified:   gui/__init__.py
	modified:   gui/gui_state.py
	new file:   gui/style.py
	modified:   gui/textbox.py
	modified:   gui/viewport.py
	modified:   gui/widget.py
	modified:   main.py