root = Card([header, taskSection, actions])
header = CardHeader("Focus view", "Your single most urgent task")
taskSection = Card([taskTitle, deadlineCallout, statusRow], "sunk", "column", "m")
taskTitle = TextContent("**Ship the Q3 board deck**", "large")
deadlineCallout = Callout("warning", "Deadline", "Tomorrow, 9:00 AM · 14 hours left")
statusRow = Card([statusLabel, statusTag], "clear", "row", "s", "center")
statusLabel = TextContent("Status", "small-heavy")
statusTag = Tag("In progress", null, null, "warning")
actions = Buttons([markDoneBtn])
markDoneBtn = Button("Mark as done", null, "primary")