root = Card([header, voteForm])
header = CardHeader("Where should we go for lunch on Friday?", "Pick your top choice — voting closes Friday at 10am")
voteForm = Form("lunch-poll", formButtons, [restaurantField])
restaurantField = FormControl("Choose a restaurant", restaurantRadio)
restaurantRadio = RadioGroup("restaurant", [sushiOpt, tacosOpt, burgersOpt])
sushiOpt = RadioItem("Sushi House", "Fresh nigiri and specialty rolls", "sushi")
tacosOpt = RadioItem("Taco El Gordo", "Street tacos with homemade salsa", "tacos")
burgersOpt = RadioItem("Burger Barn", "Smash burgers and loaded fries", "burgers")
formButtons = Buttons([voteBtn])
voteBtn = Button("Vote", null, "primary")