.isv-checkout {
  max-width: 1100px;
  margin: 0 auto;
  padding: 24px;
}

.isv-header {
  background: #f5f7fb;
  border-radius: 12px;
  padding: 20px 24px;
  margin-bottom: 24px;
}

.isv-header h2 {
  margin: 0 0 6px;
  font-size: 24px;
}

.isv-course-dates {
  color: #4a4f55;
}

.isv-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
}

.isv-section {
  background: #fff;
  border: 1px solid #e5e9f2;
  border-radius: 12px;
  padding: 18px;
  margin-bottom: 18px;
}

.isv-section h3 {
  margin-top: 0;
  margin-bottom: 16px;
  font-size: 18px;
}

.isv-field {
  margin-bottom: 12px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.isv-field input {
  padding: 10px 12px;
  border: 1px solid #ccd3e0;
  border-radius: 8px;
}

.isv-options {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.isv-option {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px;
  border: 1px solid #d7dce5;
  border-radius: 10px;
}

.isv-option input {
  margin-right: 8px;
}

.isv-installment-list {
  font-size: 14px;
  color: #4a4f55;
  display: grid;
  gap: 4px;
}

.isv-installment-note {
  font-size: 13px;
  color: #6b7280;
}

.isv-summary {
  display: grid;
  gap: 12px;
}

.isv-summary-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}

.isv-promo {
  display: flex;
  gap: 8px;
  width: 100%;
}

.isv-promo input {
  flex: 1;
  padding: 8px 10px;
  border: 1px solid #ccd3e0;
  border-radius: 8px;
  width:100%;
}

.isv-promo button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 8px 14px;
  border-radius: 8px;
  border: 1px solid #0b5ed7;
  background: #0b5ed7;
  color: #fff;
}

.isv-promo button[disabled] {
  opacity: 0.7;
  cursor: wait;
}

.isv-promo button.is-loading::before {
  width: 14px;
  height: 14px;
  border: 2px solid rgb(255 255 255 / 45%);
  border-top-color: #fff;
  border-radius: 50%;
  content: '';
  animation: isv-spin 0.75s linear infinite;
}

.isv-card-element {
  padding: 12px;
  border: 1px solid #ccd3e0;
  border-radius: 8px;
  background: #fff;
}

.isv-actions {
  display: grid;
  gap: 10px;
}

#isv-pay-button {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  padding: 12px 18px;
  border-radius: 10px;
  border: none;
  background: #111827;
  color: #fff;
  font-size: 16px;
}

#isv-pay-button[disabled] {
  opacity: 0.6;
  cursor: not-allowed;
}

.isv-error {
  color: #b91c1c;
  font-size: 14px;
  margin-top: 8px;
}

.isv-status {
  min-height: 20px;
  font-size: 14px;
  color: #374151;
}

.isv-status--success {
  color: #14532d;
}

.isv-status--error {
  color: #b91c1c;
}

.isv-status--info {
  color: #1e40af;
}

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

@media (max-width: 900px) {
  .isv-grid {
    grid-template-columns: 1fr;
  }
}