.top-nav {
  display: flex;
  gap: 1.25rem;
  align-items: center;
}

.checkout-shell {
  max-width: 36rem;
  margin: 0 auto;
  padding: clamp(2rem, 8vh, 4rem) 1.5rem 4rem;
}

.checkout-panel .eyebrow {
  margin: 0 0 0.5rem;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}

.checkout-panel h1 {
  margin: 0 0 0.75rem;
  font-family: "Fraunces", Georgia, serif;
  font-size: clamp(2.2rem, 5vw, 3rem);
  color: var(--field);
  letter-spacing: -0.03em;
}

.price-line {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
  margin: 0 0 1.5rem;
  font-weight: 600;
}

.price-line span:first-child {
  font-family: "Fraunces", Georgia, serif;
  font-size: 2.4rem;
  color: var(--field);
}

.price-line span:last-child {
  color: var(--muted);
}

.checkout-form .button {
  width: 100%;
  margin-top: 0.5rem;
}

.checkout-form .button:disabled {
  opacity: 0.65;
  cursor: wait;
  transform: none;
}

.success-panel {
  max-width: 40rem;
  margin: 0 auto;
  padding: clamp(2rem, 8vh, 4rem) 1.5rem 4rem;
}

.license-box {
  margin: 1.5rem 0;
  padding: 1rem 1.1rem;
  background: rgba(255, 255, 255, 0.65);
  border: 1px solid rgba(20, 32, 28, 0.12);
  border-radius: 0.35rem;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 1.05rem;
  letter-spacing: 0.04em;
  word-break: break-all;
}