.checkout-boot-overlay {
  position: fixed;
  inset: 0;
  z-index: 99998;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.25rem;
  background: rgba(8, 15, 35, 0.72);
  backdrop-filter: blur(6px);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.25s ease, visibility 0.25s ease;
}

.checkout-boot-overlay.is-active {
  opacity: 1;
  visibility: visible;
}

.checkout-boot-card {
  width: min(100%, 360px);
  border-radius: 18px;
  background: #fff;
  box-shadow: 0 24px 60px rgba(15, 23, 42, 0.28);
  padding: 1.5rem 1.35rem 1.25rem;
  text-align: center;
}

.checkout-boot-spinner {
  width: 44px;
  height: 44px;
  margin: 0 auto 1rem;
  border: 3px solid #e2e8f0;
  border-top-color: #2563eb;
  border-radius: 50%;
  animation: checkout-boot-spin 0.9s linear infinite;
}

.checkout-boot-title {
  margin: 0 0 0.35rem;
  font: 600 1.05rem/1.35 system-ui, -apple-system, Segoe UI, sans-serif;
  color: #0f172a;
}

.checkout-boot-text {
  margin: 0;
  font: 400 0.92rem/1.5 system-ui, -apple-system, Segoe UI, sans-serif;
  color: #64748b;
}

@keyframes checkout-boot-spin {
  to { transform: rotate(360deg); }
}