root = Card([header, taskCard, actions])
header = CardHeader("Personal focus", "One task, all attention")
taskCard = Card([urgencyNote, taskTitle, taskDeadline, statusRow, progressBar], "sunk")
urgencyNote = Callout("warning", "Due soon", "This task is due tomorrow at 9:00 AM — it is your top priority right now.")
taskTitle = Heading("Prepare investor update deck", "h3")
taskDeadline = TextContent("**Deadline:** Tomorrow, 9:00 AM")
statusRow = Card([urgentTag, statusTag], "clear", "row", "m")
urgentTag = Tag("Most urgent", null, null, "warning")
statusTag = Tag("In progress", null, null, "info")
progressBar = Progress(70, "70% complete")
actions = Buttons([markDoneBtn, deferBtn])
markDoneBtn = Button("Mark as done", null, "primary")
deferBtn = Button("Defer 1 hour", null, "secondary")