.clb-isbn-feedback {
  margin-top: 8px;
  font-size: 0.9em;
}

.clb-isbn-feedback.is-info {
  opacity: 0.8;
}

.clb-isbn-feedback.is-success {
  color: var(--wp--preset--color--vivid-green-cyan, #137333);
}

.clb-isbn-feedback.is-warning {
  color: var(--wp--preset--color--luminous-vivid-amber, #8a6d00);
}

.clb-isbn-feedback.is-error {
  color: var(--wp--preset--color--vivid-red, #b42318);
}

.clb-isbn-modal[hidden] {
  display: none !important;
}

.clb-isbn-modal {
  position: fixed;
  inset: 0;
  z-index: 2147483000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: clamp(16px, 4vh, 40px) 16px;
  box-sizing: border-box;
}

.clb-isbn-modal__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(12, 16, 26, 0.56);
  backdrop-filter: blur(2px);
}

.clb-isbn-modal__dialog {
  position: relative;
  z-index: 1;
  width: min(560px, calc(100vw - 32px));
  max-height: calc(100vh - 32px);
  margin: 0;
  background: var(--wp--preset--color--base, #fff);
  color: inherit;
  border-radius: 12px;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.28);
  padding: 0;
  overflow: auto;
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.clb-isbn-modal__header,
.clb-isbn-modal__footer {
  padding: 14px 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.clb-isbn-modal__header {
  border-bottom: 1px solid rgba(0, 0, 0, 0.08);
}

.clb-isbn-modal__header h3 {
  margin: 0;
  font-size: 1.1rem;
  line-height: 1.25;
}

.clb-isbn-modal__body {
  padding: 18px;
}

.clb-isbn-modal__row {
  margin-bottom: 10px;
  line-height: 1.45;
  word-break: break-word;
}

.clb-isbn-modal__check {
  display: flex;
  gap: 8px;
  align-items: flex-start;
  margin-top: 14px;
}

.clb-isbn-modal__check input {
  margin-top: 3px;
}

.clb-isbn-modal__hint {
  margin-top: 8px;
  min-height: 1em;
  color: var(--wp--preset--color--vivid-red, #b42318);
  font-size: 0.9em;
}

.clb-isbn-modal__footer {
  border-top: 1px solid rgba(0, 0, 0, 0.08);
  justify-content: flex-end;
  position: sticky;
  bottom: 0;
  background: inherit;
}

.clb-isbn-modal__btn,
.clb-isbn-modal__icon-btn {
  cursor: pointer;
}

.clb-isbn-modal__btn {
  border: 1px solid rgba(0, 0, 0, 0.18);
  background: transparent;
  padding: 8px 14px;
  border-radius: 8px;
  font: inherit;
}

.clb-isbn-modal__btn.is-primary {
  background: var(--wp--preset--color--contrast, #111);
  color: var(--wp--preset--color--base, #fff);
  border-color: transparent;
}

.clb-isbn-modal__icon-btn {
  border: 0;
  background: transparent;
  font-size: 22px;
  line-height: 1;
  padding: 0 4px;
}

html.clb-isbn-modal-open,
body.clb-isbn-modal-open {
  overflow: hidden;
}

@media (max-width: 640px) {
  .clb-isbn-modal {
    align-items: flex-start;
    padding-top: max(12px, env(safe-area-inset-top));
    padding-bottom: max(12px, env(safe-area-inset-bottom));
  }

  .clb-isbn-modal__dialog {
    width: min(560px, calc(100vw - 16px));
    max-height: calc(100vh - 24px);
    border-radius: 10px;
  }
}