/* ============================================================
   Responsive Recommendation Modal
   Tutorial CSS の設計に基づくダイアログモーダル
   ============================================================ */

:root {
  /* --- Modal Size & Spacing (Tutorial CSS準拠) --- */
  --resp-modal-width: 65vw;
  --resp-modal-height: auto;
  --resp-modal-radius: 16px;
  --resp-modal-padding: 40px 36px 32px;

  /* --- Colors (gakusee platform) --- */
  --resp-modal-bg: #ffffff;
  --resp-modal-text: #333333;
  --resp-modal-text-secondary: #666666;
  --resp-modal-overlay-bg: rgba(0, 0, 0, 0.6);

  /* --- Typography (Tutorial CSS準拠) --- */
  --resp-modal-title-size: 1.8rem;
  --resp-modal-text-size: 1.4rem;

  /* --- Button --- */
  --resp-button-bg: #007bff;
  --resp-button-bg-hover: #0056b3;
  --resp-button-text: #ffffff;
}

/* --- Responsive Design Tokens --- */
@media (max-width: 768px) {
  :root {
    --resp-modal-width: 80vw;
  }
}

/* ============================================================
   Dialog Element Styling
   ============================================================ */
.responsive-recommendation-modal {
  border: none;
  border-radius: var(--resp-modal-radius);
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1), 0 10px 13px -3px rgba(0, 0, 0, 0.1);
  width: var(--resp-modal-width);
  max-height: 90vh;
  padding: 0;
  background: var(--resp-modal-bg);
  color: var(--resp-modal-text);
}

.responsive-recommendation-modal::backdrop {
  background: var(--resp-modal-overlay-bg);
}

/* ============================================================
   Modal Content (BEM準拠)
   ============================================================ */
.responsive-recommendation-modal__content {
  padding: var(--resp-modal-padding);
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
}

/* --- Close Button --- */
.responsive-recommendation-modal__close {
  position: absolute;
  top: 14px;
  right: 18px;
  background: transparent;
  border: none;
  font-size: var(--resp-modal-title-size);
  cursor: pointer;
  color: var(--resp-modal-text-secondary);
  padding: 0;
  width: 30px;
  height: 30px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: color 0.2s ease;
}

.responsive-recommendation-modal__close:hover {
  color: var(--resp-modal-text);
}

/* --- Title (Tutorial CSS と同じサイズ感) --- */
.responsive-recommendation-modal__title {
  font-size: var(--resp-modal-title-size);
  font-weight: 700;
  margin: 0 0 1rem 0;
  color: var(--resp-modal-text);
  padding-top: 10px;
}

/* --- Message Text --- */
.responsive-recommendation-modal__message {
  font-size: var(--resp-modal-text-size);
  line-height: 1.6;
  margin-bottom: 2rem;
  color: var(--resp-modal-text-secondary);
  margin-top: 0;
}

/* ============================================================
   Checkbox Group
   ============================================================ */
.responsive-recommendation-modal__checkbox-group {
  display: flex;
  align-items: center;
  gap: 8px;
  justify-content: center;
  margin-bottom: 2rem;
  margin-top: 1.5rem;
}

.responsive-recommendation-modal__checkbox {
  width: 18px;
  height: 18px;
  cursor: pointer;
  accent-color: var(--resp-button-bg);
}

.responsive-recommendation-modal__checkbox-label {
  font-size: var(--resp-modal-text-size);
  color: var(--resp-modal-text-secondary);
  cursor: pointer;
  user-select: none;
}

.responsive-recommendation-modal__checkbox-label:hover {
  color: var(--resp-modal-text);
}

/* ============================================================
   Action Button
   ============================================================ */
.responsive-recommendation-modal__button {
  background-color: var(--resp-button-bg);
  color: var(--resp-button-text);
  padding: 0.75rem 2rem;
  font-size: var(--resp-modal-text-size);
  border: none;
  border-radius: 4px;
  cursor: pointer;
  transition: background-color 0.2s ease;
  font-weight: 600;
  align-self: center;
}

.responsive-recommendation-modal__button:hover {
  background-color: var(--resp-button-bg-hover);
}