root = Card([header, taskCard, statusSection, markDoneSection])
header = CardHeader("Focus View", "One task at a time")
taskCard = Card([taskTitle, deadlineText], "sunk")
taskTitle = TextContent("**Complete quarterly report**", "large-heavy")
deadlineText = TextContent("Deadline: **Friday, 5:00 PM**", "default")
statusSection = Card([statusHeading, statusBadge, progressBar], "clear")
statusHeading = Heading("Current status", "h3")
statusBadge = Tag("In progress", null, "md", "info")
progressBar = Progress(65, "65% complete")
markDoneSection = Card([doneHeading, doneText, doneButton], "clear")
doneHeading = Heading("Mark as done", "h3")
doneText = TextContent("Once you finish, this task will be moved to your completed list.", "small")
doneButton = Button("Mark as done", null, "primary")