root = Card([header, pollForm])
header = CardHeader("Where should we go for lunch on Friday?", "Vote for your pick")
pollForm = Form("lunch-poll", pollButtons, [restaurantField])
restaurantField = FormControl("Choose a restaurant", restaurantRadio, "Pick one — votes close Thursday")
restaurantRadio = RadioGroup("restaurant", [sushiOption, tacoOption, gardenOption], "sushi")
sushiOption = RadioItem("Sushi House", "Fresh sushi, poke bowls and bento boxes", "sushi")
tacoOption = RadioItem("Taco Cantina", "Street tacos, burritos and quesadillas", "tacos")
gardenOption = RadioItem("Green Garden", "Salads, grain bowls and flatbreads", "garden")
pollButtons = Buttons([voteBtn])
voteBtn = Button("Vote", null, "primary")