/* ========================================
   FLASHCARDS - CLEAN MODERN DESIGN
   ======================================== */

/* Main Container */
.flashcards-interface {
  display: flex;
  height: 100%;
  width: 100%;
  justify-content: center;
  align-items: center;
}

.flashcards-content {
  position: relative;
  width: 100%;
}

.flashcards-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
  padding: 20px;
}

.flashcards-action-buttons {
  display: flex;
  gap: 10px;
  align-items: center;
  justify-content: flex-end;
  width: 100%;
  padding: 20px;
}

.flashcards-container {
  width: 100%;
  max-width: 400px;
  margin: 0 auto;
}

.flashcards-progress {
  text-align: center;
  font-size: 15px;
  font-weight: 600;
  color: #86868b;
  letter-spacing: -0.01em;
  margin-bottom: 10px;
}

.flashcards-card-container {
  perspective: 2000px;
  margin-bottom: 32px;
}

.flashcards-card {
  width: 100%;
  height: 520px;
  position: relative;
  transform-style: preserve-3d;
  transition: transform 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);
  cursor: pointer;
}

.flashcards-card.flipped {
  transform: rotateY(180deg);
}

.flashcards-card-face {
  position: absolute;
  width: 100%;
  height: 100%;
  backface-visibility: hidden;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 60px 40px;
  text-align: center;
  border-radius: 28px;
  background: #ffffff;
  box-shadow: 0 4px 40px rgba(0, 0, 0, 0.08);
  transition: box-shadow 0.3s ease;
}

.flashcards-card-actions {
  position: absolute;
  top: 16px;
  right: 16px;
  display: flex;
  gap: 8px;
  z-index: 10;
}

.flashcards-card-action-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  padding: 0;
  border: none;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(8px);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  cursor: pointer;
  transition: all 0.2s ease;
  color: #1d1d1f;
}

.flashcards-card-action-btn:hover {
  background: #ffffff;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
  transform: scale(1.05);
}

.flashcards-card-action-btn:active {
  transform: scale(0.95);
}

.flashcards-card-edit-btn:hover {
  color: #0071e3;
}

.flashcards-card-delete-btn:hover {
  color: #ff3b30;
  background: rgba(255, 59, 48, 0.1);
}

.flashcards-card-action-btn svg {
  width: 18px;
  height: 18px;
  stroke-width: 2;
}

.flashcards-card:hover .flashcards-card-face {
  box-shadow: 0 8px 60px rgba(0, 0, 0, 0.12);
}

.flashcards-card-label {
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 24px;
  color: #86868b;
}

.flashcards-card-content {
  font-size: 32px;
  font-weight: 600;
  line-height: 1.3;
  letter-spacing: -0.02em;
  color: #1d1d1f;
}

.flashcards-card-front {
  background: #ffffff;
}

.flashcards-card-front .flashcards-card-label {
  color: #0071e3;
}

.flashcards-card-back {
  background: #ffffff;
  transform: rotateY(180deg);
}

.flashcards-card-back .flashcards-card-content {
  font-size: 24px;
  font-weight: 500;
}

.flashcards-card-back .flashcards-card-label {
  color: #06c;
}

.flashcards-controls {
  display: flex;
  gap: 12px;
  justify-content: center;
  align-items: center;
}

.flashcards-center-button {
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 120px;
}

.flashcards-btn {
  padding: 14px 28px;
  font-size: 15px;
  font-weight: 600;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  border: none;
  border-radius: 980px;
  cursor: pointer;
  transition: all 0.2s ease;
  letter-spacing: -0.01em;
}

.flashcards-btn-nav {
  background: #ffffff;
  color: #1d1d1f;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
}

.flashcards-btn-nav:hover:not(:disabled) {
  background: #f5f5f7;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12);
  transform: translateY(-1px);
}

.flashcards-btn-nav:active:not(:disabled) {
  transform: scale(0.98);
}

.flashcards-btn-nav:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}

.flashcards-btn-flip {
  background: #0071e3;
  color: #ffffff;
  padding: 14px 36px;
  box-shadow: 0 2px 12px rgba(0, 113, 227, 0.3);
}

.flashcards-btn-flip:hover {
  background: #0077ed;
  box-shadow: 0 4px 16px rgba(0, 113, 227, 0.4);
  transform: translateY(-1px);
}

.flashcards-btn-flip:active {
  transform: scale(0.98);
}

.flashcards-rating-buttons {
  display: flex;
  gap: 12px;
  justify-content: center;
  align-items: center;
}

.flashcards-controls .flashcards-rating-buttons {
  margin: 0;
}

.flashcards-btn-correct {
  background: #34c759;
  color: #ffffff;
  padding: 12px 24px;
  box-shadow: 0 2px 12px rgba(52, 199, 89, 0.3);
  display: flex;
  align-items: center;
  gap: 8px;
}

.flashcards-btn-correct:hover {
  background: #30d158;
  box-shadow: 0 4px 16px rgba(52, 199, 89, 0.4);
  transform: translateY(-1px);
}

.flashcards-btn-correct:active {
  transform: scale(0.98);
}

.flashcards-btn-incorrect {
  background: #ff3b30;
  color: #ffffff;
  padding: 12px 24px;
  box-shadow: 0 2px 12px rgba(255, 59, 48, 0.3);
  display: flex;
  align-items: center;
  gap: 8px;
}

.flashcards-btn-incorrect:hover {
  background: #ff453a;
  box-shadow: 0 4px 16px rgba(255, 59, 48, 0.4);
  transform: translateY(-1px);
}

.flashcards-btn-incorrect:active {
  transform: scale(0.98);
}

.flashcards-btn-correct svg,
.flashcards-btn-incorrect svg {
  width: 20px;
  height: 20px;
  stroke-width: 2.5;
}

/* Create Flashcard Modal - Inspired by Action Not Available Popup */
.modal#flashcardsCreateModal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.5);
  z-index: 10000;
  animation: fadeIn 0.3s ease-out;
  align-items: center;
  justify-content: center;
}

.modal#flashcardsCreateModal[style*="display: flex"] {
  display: flex !important;
}

.modal-content.create-modal {
  position: relative;
  background: var(--sidebar-bg, #ffffff);
  border-radius: 16px;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
  min-width: 400px;
  max-width: 500px;
  width: 90%;
  animation: slideIn 0.3s ease-out;
  border: 1px solid var(--border-color, #D9D9D9);
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes slideIn {
  from {
    opacity: 0;
    transform: translate(-50%, -50%) scale(0.95);
  }
  to {
    opacity: 1;
    transform: translate(-50%, -50%) scale(1);
  }
}

.modal-content.create-modal {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

.modal-body {
  padding: 24px;
}

.modal-title {
  margin: 0 0 20px 0;
}

.modal-title h3 {
  margin: 0;
  font-size: var(--font-size-xlarge, 20px);
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

.flashcards-form-group {
  margin-bottom: 20px;
}

.flashcards-form-group:last-of-type {
  margin-bottom: 24px;
}

.flashcards-form-label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: var(--font-size-base, 15px);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 10px;
  letter-spacing: -0.01em;
}

.flashcards-label-icon {
  font-size: 16px;
}

.flashcards-form-input {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--input-border, #CCCCCC);
  border-radius: 12px;
  font-size: var(--font-size-base, 15px);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  color: var(--text-primary);
  background: var(--input-bg, #FFFFFF);
  transition: all 0.2s ease;
  resize: vertical;
  line-height: 1.5;
  box-sizing: border-box;
}

.flashcards-form-input:focus {
  outline: none;
  border-color: var(--accent, #4A74E8);
  box-shadow: 0 0 0 2px rgba(74, 116, 232, 0.1);
}

.flashcards-form-input::placeholder {
  color: var(--text-faded, #777777);
}

.flashcards-difficulty-options {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.flashcards-difficulty-option {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  border: 1px solid var(--border-primary, #e5e5e7);
  border-radius: 20px;
  cursor: pointer;
  transition: all 0.2s ease;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-primary, #1d1d1f);
  background: var(--background, #ffffff);
}

.flashcards-difficulty-option:hover {
  border-color: var(--primary, #0071e3);
  background: var(--background-secondary, #f5f5f7);
}

.flashcards-difficulty-option input[type="radio"] {
  margin: 0;
  cursor: pointer;
  accent-color: var(--primary, #0071e3);
}

.flashcards-difficulty-option input[type="radio"]:checked + span {
  color: var(--primary, #0071e3);
  font-weight: 600;
}

.flashcards-difficulty-option:has(input[type="radio"]:checked) {
  border-color: var(--primary, #0071e3);
  background: var(--background-secondary, rgba(0, 113, 227, 0.05));
}

.flashcards-radio-group {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.flashcards-radio-label {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  border: 1px solid var(--border-primary, #e5e5e7);
  border-radius: 12px;
  cursor: pointer;
  transition: all 0.2s ease;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-primary, #1d1d1f);
  background: var(--background, #ffffff);
}

.flashcards-radio-label:hover {
  border-color: var(--primary, #0071e3);
  background: var(--background-secondary, #f5f5f7);
}

.flashcards-radio-label input[type="radio"] {
  margin: 0;
  cursor: pointer;
  accent-color: var(--primary, #0071e3);
}

.flashcards-radio-label:has(input[type="radio"]:checked) {
  border-color: var(--primary, #0071e3);
  background: var(--background-secondary, rgba(0, 113, 227, 0.05));
}

.flashcards-radio-label:has(input[type="radio"]:checked) span {
  color: var(--primary, #0071e3);
  font-weight: 600;
}

.modal-actions {
  display: flex;
  gap: 12px;
  justify-content: center;
  margin-top: 24px;
  padding-top: 20px;
  border-top: 1px solid var(--border-color, #D9D9D9);
  width: 100%;
}

.btn {
  padding: 12px 20px;
  border-radius: 12px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  border: none;
  font-size: var(--font-size-base, 15px);
  flex: 1;
  width: 100%;
  text-align: center;
  display: flex;
  align-items: center;
  justify-content: center;
}

.btn-cancel {
  background: var(--nav-active-bg, #F2F2F2);
  color: var(--text-secondary, #444444);
  border: 1px solid var(--border-color, #D9D9D9);
}

.btn-cancel:hover {
  background: var(--input-bg, #FFFFFF);
  color: var(--text-primary);
}

.btn-create {
  background: var(--accent, #4A74E8);
  color: #ffffff;
  border: 1px solid var(--accent, #4A74E8);
}

.btn-create:hover {
  background: var(--accent-hover, #6C90FF);
  border-color: var(--accent-hover, #6C90FF);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(74, 116, 232, 0.3);
}

.btn-create[style*="background: #ef4444"] {
  background: #ef4444 !important;
  border-color: #ef4444 !important;
}

.btn-create[style*="background: #ef4444"]:hover {
  background: #dc2626 !important;
  border-color: #dc2626 !important;
}

/* Edit and Delete Modal Styles */
.modal#flashcardsEditModal,
.modal#flashcardsDeleteModal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.5);
  z-index: 10000;
  animation: fadeIn 0.3s ease-out;
  align-items: center;
  justify-content: center;
}

.modal#flashcardsEditModal[style*="display: flex"],
.modal#flashcardsDeleteModal[style*="display: flex"] {
  display: flex !important;
}

/* Bluey Generate Modal Styles */
.modal#blueyQuizModal,
.modal#blueyProcessingModal,
.modal#processingModal,
.modal#blueyGenerateModal,
.modal#flashcardsProcessingModal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.5);
  z-index: 10003;
  animation: fadeIn 0.3s ease-out;
  align-items: center;
  justify-content: center;
}

.modal#blueyQuizModal[style*="display: flex"],
.modal#blueyProcessingModal[style*="display: flex"],
.modal#processingModal[style*="display: flex"],
.modal#blueyGenerateModal[style*="display: flex"],
.modal#flashcardsProcessingModal[style*="display: flex"] {
  display: flex !important;
}

/* Processing Modal Specific Styles - Matching Quiz Popup Exactly */
.modal#processingModal .modal-content.create-modal,
.modal#flashcardsProcessingModal .modal-content.create-modal {
  min-width: auto !important;
  max-width: 400px !important;
  width: auto !important;
  position: absolute !important;
  top: 50% !important;
  left: 50% !important;
  transform: translate(-50%, -50%) !important;
}

.modal#processingModal .modal-body,
.modal#flashcardsProcessingModal .modal-body {
  padding: 40px 28px !important;
  text-align: center !important;
}

.modal#processingModal img,
.modal#flashcardsProcessingModal img {
  width: 80px !important;
  height: 80px !important;
  max-width: 80px !important;
  max-height: 80px !important;
  border-radius: 50% !important;
  display: block !important;
  margin: 0 auto !important;
}

.modal#processingModal h3,
.modal#flashcardsProcessingModal h3 {
  margin: 0 0 12px 0 !important;
  color: var(--text-primary, #1d1d1f) !important;
  font-size: 20px !important;
  font-weight: 600 !important;
}

.modal#processingModal p,
.modal#flashcardsProcessingModal p {
  margin: 0 !important;
  color: var(--text-secondary, #6e6e73) !important;
  font-size: 14px !important;
  line-height: 1.6 !important;
}

.modal#processingModal > div > div > div[style*="margin-bottom"],
.modal#flashcardsProcessingModal > div > div > div[style*="margin-bottom"] {
  margin-bottom: 24px !important;
}

.modal#processingModal > div > div > div[style*="margin-top"],
.modal#flashcardsProcessingModal > div > div > div[style*="margin-top"] {
  margin-top: 20px !important;
}

.bluey-chapters-selection {
  margin-top: 10px;
}

.bluey-chapters-grid {
  display: flex;
  flex-direction: column;
  gap: 10px;
  max-height: 250px;
  overflow-y: auto;
  padding: 12px;
  border: 1px solid var(--border-primary, #e5e5e7);
  border-radius: var(--radius-lg, 12px);
  background: var(--background, #ffffff);
}

.bluey-chapter-item {
  width: 100%;
  margin: 0;
  padding: 0;
  border: none;
  background: transparent;
}

.bluey-chapters-grid .bluey-chapter-checkbox-label {
  display: flex !important;
  align-items: center !important;
  gap: 12px !important;
  padding: 12px 16px !important;
  border: 1px solid var(--border-primary, #e5e5e7) !important;
  border-radius: var(--radius-lg, 12px) !important;
  cursor: pointer !important;
  transition: all 0.2s ease !important;
  background: var(--background, #ffffff) !important;
  font-size: 14px !important;
  font-weight: 500 !important;
  color: var(--text-primary, #1d1d1f) !important;
  width: 100% !important;
  box-sizing: border-box !important;
  position: relative !important;
  transform: none !important;
}

.bluey-chapters-grid .bluey-chapter-checkbox-label::before {
  display: none !important;
}

.bluey-chapters-grid .bluey-chapter-checkbox-label:hover {
  border-color: var(--primary, #0071e3) !important;
  background: var(--background-secondary, #f5f5f7) !important;
  transform: none !important;
}

.bluey-chapters-grid .bluey-chapter-checkbox {
  margin: 0 !important;
  width: 18px !important;
  height: 18px !important;
  cursor: pointer !important;
  accent-color: var(--primary, #0071e3) !important;
  flex-shrink: 0 !important;
}

.bluey-chapters-grid .bluey-chapter-name {
  flex: 1 !important;
  font-size: 14px !important;
  font-weight: 500 !important;
  color: var(--text-primary, #1d1d1f) !important;
  line-height: 1.4 !important;
}

.bluey-chapters-grid .bluey-chapter-checkbox-label:has(input.bluey-chapter-checkbox:checked) {
  border-color: var(--primary, #0071e3) !important;
  background: var(--background-secondary, rgba(0, 113, 227, 0.05)) !important;
  transform: none !important;
}

.bluey-chapters-grid .bluey-chapter-checkbox-label:has(input.bluey-chapter-checkbox:checked)::before {
  display: none !important;
}

.bluey-chapters-grid .bluey-chapter-checkbox-label:has(input.bluey-chapter-checkbox:checked) .bluey-chapter-name {
  color: var(--primary, #0071e3) !important;
  font-weight: 600 !important;
}

.no-chapters {
  text-align: center;
  padding: 20px;
  color: var(--text-secondary, #6e6e73);
  font-size: 14px;
}

select.flashcards-form-input {
  appearance: none;
  -webkit-appearance: none;
  -moz-appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23111111' d='M6 9L1 4h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 16px center;
  padding-right: 40px;
  cursor: pointer;
}

/* Bluey button in generate modal */
.btn-create img {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  margin-right: 8px;
  object-fit: contain;
  display: inline-block;
  vertical-align: middle;
}

.bluey-loading-spinner {
  display: inline-flex;
  align-items: center;
  margin-left: 8px;
}

.bluey-spinner {
  width: 14px;
  height: 14px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top-color: #ffffff;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

.btn-create:has(.bluey-loading-spinner) {
  position: relative;
}

.btn-create .bluey-loading-spinner {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
}

.btn-create .bluey-loading-spinner ~ span {
  opacity: 0;
}

.flashcards-hint {
  text-align: center;
  margin-top: 24px;
  font-size: 13px;
  color: #86868b;
  font-weight: 500;
}

.flashcards-action-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  padding: 0;
  border: none;
  border-radius: 50%;
  background: #ffffff;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  cursor: pointer;
  transition: all 0.2s ease;
}

.flashcards-action-btn:hover {
  background: #f5f5f7;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
  transform: translateY(-2px);
}

.flashcards-action-btn:active {
  transform: scale(0.95);
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.1);
}

.flashcards-action-btn.active {
  background: var(--primary, #0071e3);
  box-shadow: 0 2px 12px rgba(0, 113, 227, 0.3);
}

.flashcards-action-btn.active:hover {
  background: var(--primary-hover, #0077ed);
  box-shadow: 0 4px 16px rgba(0, 113, 227, 0.4);
}

.flashcards-action-btn.active svg {
  color: #ffffff;
  stroke: #ffffff;
}

.flashcards-action-btn svg {
  color: #1d1d1f;
  transition: color 0.2s ease;
}

.flashcards-action-btn:hover svg {
  color: #0071e3;
}

.flashcards-action-btn img {
  width: 32px;
  height: 32px;
  object-fit: contain;
  border-radius: 50%;
}
/* Adjust flashcards for tool interface panel */
.tool-interface-content .flashcards-card {
  height: 400px;
}

.tool-interface-content .flashcards-card-content {
  font-size: 24px;
}

.tool-interface-content .flashcards-card-back .flashcards-card-content {
  font-size: 18px;
}

@media (max-width: 600px) {
  .flashcards-card {
      height: 460px;
  }

  .flashcards-card-content {
      font-size: 28px;
  }

  .flashcards-card-back .flashcards-card-content {
      font-size: 20px;
  }
}