# A label is plain text — it may span lines with `\n` — and coexists with arrow
# styling: pathColor on a node colours the arrows that start there, while the
# label stays on its own plate. Straight-mode labels need room beside the line,
# so a vertical flow (open canvas to the side) shows them off well.
checkout {
  cart    { label: "Cart" }
  payment { label: "Payment" }
  email   { label: "Email" }
}

@layout {
  margin: 28
  checkout { box: none; direction: vertical }
  checkout.payment { pathColor: #16a34a }   # arrows leaving Payment turn green
}

checkout.cart    --> checkout.payment { label: "POST /charge\n(idempotent)" }
checkout.payment --> checkout.email   { label: "send receipt" }