.ptg-study-container {
  max-width: 900px;
  width: 900px;
  margin: 0;
  padding: 10px;
  box-sizing: border-box;
  overflow-x: hidden;
  font-family:
    -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue",
    Arial, sans-serif;
  position: relative;
  left: 50%;
  transform: translateX(-50%);
}

.ptg-header-btn {
  display: inline-flex;
  align-items: center;
  padding: 9px 18px;
  background: #f5f6f8;
  color: #1f2937;
  font-size: 14px;
  font-weight: 600;
  border-radius: 999px;
  text-decoration: none !important;
  border: 1px solid #e5e7eb;
  cursor: pointer;
  transition: all 0.2s ease;
  font-family: inherit;
}

.ptg-header-btn:hover {
  background: #e9ecf1;
  color: #111827;
}

.ptg-session-grid-2col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  align-items: start;
}

.ptg-session-column {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.ptg-course-categories {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.ptg-category {
  background-color: #fff;
  border: 1px solid #e2e8f0;
  border-radius: 12px;
  box-shadow:
    0 4px 6px -1px rgba(0, 0, 0, 0.1),
    0 2px 4px -1px rgba(0, 0, 0, 0.06);
  overflow: hidden;
  transition:
    transform 0.2s ease-in-out,
    box-shadow 0.2s ease-in-out,
    border-color 0.2s ease-in-out;
  cursor: pointer;
}

.ptg-category:hover,
.ptg-category.ptg-category--active {
  transform: translateY(-4px);
  box-shadow:
    0 10px 15px -3px rgba(0, 0, 0, 0.1),
    0 4px 6px -2px rgba(0, 0, 0, 0.05);
  border-color: #4299e1;
}

.ptg-category-header {
  padding: 20px;
  border-bottom: 1px solid #e2e8f0;
}

.ptg-category-title {
  margin: 0;
  font-size: 1.25rem;
  font-weight: 600;
  display: flex;
  align-items: center;
}

.ptg-category-desc {
  margin-top: 8px;
  font-size: 0.9rem;
  color: #718096;
}

.ptg-subject-list {
  list-style: none;
  padding: 1px 1px 1px 1px;
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.ptg-subject-item {
  background-color: #f1f5f9;
  padding: 0; /* Changed padding handling for inner content */
  border-radius: 12px; /* Slightly less rounded to match bar */
  cursor: pointer;
  transition:
    background-color 0.2s,
    color 0.2s;
  font-size: 0.875rem;
  flex-shrink: 0;
  position: relative;
  overflow: hidden; /* For progress bar containment */
  border: 1px solid transparent;
}

.ptg-subject-content {
  position: relative;
  z-index: 2;
  padding: 10px 16px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
  box-sizing: border-box;
}

.ptg-subject-name {
  font-weight: 500;
}

.ptg-subject-percent {
  font-size: 0.75rem;
  font-weight: 700;
  color: #64748b;
  margin-left: 8px;
}
.ptg-subject-item:hover .ptg-subject-percent {
  color: rgba(255, 255, 255, 0.9);
}

.ptg-subject-progress-bar {
  position: absolute;
  bottom: 0;
  left: 0;
  height: 4px;
  background-color: #cbd5e1; /* Default/Empty state */
  width: 0%;
  transition: width 0.6s ease-out;
  z-index: 1;
}

/* Dynamic colors based on progress can be handled in JS or CSS classes */
/* For now, we use a brand color for the active bar */
.ptg-subject-progress-bar.has-progress {
  background-color: #60a5fa; /* Blue-400 */
}

/* Hover state overrides */
.ptg-subject-item:hover {
  background-color: #4a5568;
  color: #fff;
  border-color: #4a5568;
}

.ptg-lesson-subjects {
  margin-bottom: 16px;
  font-size: 0.9rem;
  color: #4a5568;
}

.ptg-lesson-subject-chip {
  display: inline-block;
  background-color: #edf2f7;
  border-radius: 9999px;
  padding: 4px 12px;
  margin-right: 8px;
  margin-bottom: 6px;
  font-size: 0.85rem;
}

.ptg-lesson-view {
  padding: 10px;
  max-width: 900px;
}

#back-to-courses {
  margin-bottom: 20px;
}

.ptg-lesson-list .ptg-quiz-card {
  background-color: #fff;
  border: 1px solid #e2e8f0;
  border-radius: 8px;
  margin-bottom: 20px;
  padding: 20px;
}

.ptg-question-text {
  font-size: 1rem;
  line-height: 1.6;
  margin-bottom: 12px;
}

.ptg-question-number {
  font-weight: 700;
  margin-right: 6px;
}

.ptg-question-options {
  list-style: none;
  padding: 0;
  margin: 0 0 16px 0;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.ptg-question-option {
  background-color: transparent;
  border: none;
  border-radius: 0;
  padding: 2px 0;
  font-size: 0.95rem;
  line-height: 1.4;
  margin: 0;
  box-shadow: none;
}

.ptg-lesson-header {
  padding-bottom: 20px;
  font-size: 1.2 rem;
}

.ptg-lesson-header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 16px;
}

.ptg-lesson-header-row h2 {
  margin: 0;
}

.ptg-random-toggle {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.9rem;
  cursor: pointer;
  white-space: nowrap;
}

.ptg-random-toggle input[type="checkbox"] {
  cursor: pointer;
}

.ptg-lesson-answer-area {
  margin-top: 20px;
  padding-top: 20px;
  border-top: 1px dashed #e2e8f0;
}

.ptg-answer-buttons-container {
  display: flex;
  align-items: center;
  padding-bottom: 10px;
  gap: 8px;
  flex-wrap: wrap;
}

.ptg-lesson-answer-area .answer-content {
  margin-top: 16px !important;
  padding: 16px 20px !important;
  background-color: #f8f9fa !important;
  border-radius: 8px !important;
  border: 1px solid #e9ecef !important;
}

.ptg-lesson-answer-area .answer-content p {
  margin: 0 0 12px 0 !important;
}

.ptg-lesson-answer-area .answer-content p:last-child {
  margin-bottom: 0 !important;
}

.ptg-lesson-answer-area .answer-content hr {
  margin: 12px 0 !important;
  border: none !important;
  border-top: 1px solid #dee2e6 !important;
}

/* Contextual Action Button */
.ptg-contextual-action-btn {
  flex-shrink: 0;
  background: transparent;
  border: 1px solid #ddd;
  border-radius: 50%;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.2s ease;
  color: #666;
  font-size: 20px;
  margin-left: 0;
}

.ptg-contextual-action-btn:hover {
  background: #f5f5f5;
  border-color: #999;
  color: #333;
}

/* Question Toolbar - Modern Glassmorphism Design */
.ptg-question-toolbar {
  padding: 8px 12px; /* 높이 축소 */
  background: linear-gradient(
    135deg,
    rgba(255, 255, 255, 0.95) 0%,
    rgba(248, 250, 252, 0.95) 100%
  );
  backdrop-filter: blur(10px);
  border: 1px solid rgba(226, 232, 240, 0.8);
  border-radius: 12px;
  margin-bottom: 16px;
  display: none;
  box-shadow:
    0 4px 6px -1px rgba(0, 0, 0, 0.05),
    0 2px 4px -1px rgba(0, 0, 0, 0.03);
  animation: toolbar-slide-in 0.3s ease-out;
}

@keyframes toolbar-slide-in {
  from {
    opacity: 0;
    transform: translateY(-8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.ptg-question-toolbar .ptg-toolbar-icons {
  display: flex;
  gap: 10px;
  justify-content: flex-end; /* 오른쪽 정렬 */
  align-items: center;
}

/* Toolbar Icon Buttons */
.ptg-btn-icon {
  background: transparent !important;
  border: none !important;
  padding: 8px;
  cursor: pointer;
  font-size: 20px;
  transition: color 0.2s, background-color 0.2s;
  border-radius: 4px;
  color: #333;
  outline: none !important;
  box-shadow: none !important;
}

.ptg-btn-icon:not(.active):hover {
  color: #d63638;
  background-color: transparent !important;
  transform: scale(1.05);
  border: none !important;
  outline: none !important;
  box-shadow: none !important;
}

.ptg-btn-icon.active {
  color: #4a90e2 !important;
  background-color: transparent !important;
  border: 2px solid #4a90e2 !important;
}

/* 북마크 활성화 상태 */
.ptg-question-toolbar .ptg-toolbar-icons .ptg-btn-bookmark.active,
.ptg-btn-icon.ptg-btn-bookmark.active {
  color: #4a90e2 !important;
  background-color: transparent !important;
  border: 2px solid #4a90e2 !important;
}

.ptg-question-toolbar .ptg-toolbar-icons .ptg-btn-bookmark.active:hover,
.ptg-btn-icon.ptg-btn-bookmark.active:hover {
  background-color: rgba(74, 144, 226, 0.05) !important;
  border-color: #357abd !important;
  color: #357abd !important;
}

/* 복습 활성화 상태 */
.ptg-question-toolbar .ptg-toolbar-icons .ptg-btn-review.active,
.ptg-btn-icon.ptg-btn-review.active {
  color: #4a90e2 !important;
  background-color: transparent !important;
  border: 2px solid #4a90e2 !important;
}

.ptg-question-toolbar .ptg-toolbar-icons .ptg-btn-review.active:hover,
.ptg-btn-icon.ptg-btn-review.active:hover {
  background-color: rgba(74, 144, 226, 0.05) !important;
  border-color: #357abd !important;
  color: #357abd !important;
}

/* 메모 활성화 상태 */
.ptg-question-toolbar .ptg-toolbar-icons .ptg-btn-notes.active,
.ptg-btn-icon.ptg-btn-notes.active {
  color: #4a90e2 !important;
  background-color: transparent !important;
  border: 2px solid #4a90e2 !important;
}

.ptg-question-toolbar .ptg-toolbar-icons .ptg-btn-notes.active:hover,
.ptg-btn-icon.ptg-btn-notes.active:hover {
  background-color: rgba(74, 144, 226, 0.05) !important;
  border-color: #357abd !important;
  color: #357abd !important;
}

/* 암기카드 활성화 상태 */
.ptg-question-toolbar .ptg-toolbar-icons .ptg-btn-flashcard.active,
.ptg-btn-icon.ptg-btn-flashcard.active {
  color: #4a90e2 !important;
  background-color: transparent !important;
  border: 2px solid #4a90e2 !important;
}

.ptg-question-toolbar .ptg-toolbar-icons .ptg-btn-flashcard.active:hover,
.ptg-btn-icon.ptg-btn-flashcard.active:hover {
  background-color: rgba(74, 144, 226, 0.05) !important;
  border-color: #357abd !important;
  color: #357abd !important;
}

/* 포커스 상태 - active 상태가 아닐 때는 outline 제거 */
.ptg-btn-icon:not(.active):focus,
.ptg-btn-icon:not(.active):focus-visible {
  outline: none !important;
  outline-offset: 0 !important;
}

/* 학습 Tip 모달 */
.ptg-study-tip-modal {
  position: fixed;
  inset: 0;
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 10000;
}

.ptg-study-tip-modal.is-open {
  display: flex;
}

.ptg-study-tip-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(2px);
}

.ptg-study-tip-dialog {
  position: relative;
  width: min(900px, calc(100% - 40px));
  max-height: 90vh;
  background: #ffffff;
  border-radius: 16px;
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.35);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  animation: ptg-quiz-tip-modal-fade-in 0.3s ease;
}

.ptg-study-tip-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 24px 32px;
  background: linear-gradient(135deg, #4a90e2 0%, #357abd 100%);
  color: #fff;
  border-bottom: 1px solid rgba(255, 255, 255, 0.25);
  border-top-left-radius: inherit;
  border-top-right-radius: inherit;
  min-height: 72px;
  box-sizing: border-box;
}

.ptg-study-tip-header h3 {
  margin: 0;
  font-size: 24px;
  font-weight: 700;
  color: #fff;
}

.ptg-study-tip-close {
  background: #ffffff;
  border: none;
  color: #1d3f7c;
  font-size: 26px;
  width: 44px;
  height: 44px;
  border-radius: 999px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease;
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.15);
  padding: 0;
  line-height: 1;
}

.ptg-study-tip-close span {
  pointer-events: none;
}

.ptg-study-tip-close:hover {
  background: #f0f4ff;
  color: #0f2a57;
  transform: scale(1.05);
}

.ptg-study-tip-close:focus-visible {
  outline: 3px solid rgba(255, 255, 255, 0.85);
  outline-offset: 2px;
}

.ptg-study-tip-body {
  padding: 30px;
  overflow-y: auto;
  flex: 1;
}

.ptg-study-tip-section {
  margin-bottom: 30px;
}

.ptg-study-tip-section:last-child {
  margin-bottom: 0;
}

.ptg-study-tip-section h4 {
  margin: 0 0 15px 0;
  font-size: 20px;
  font-weight: 700;
  color: #333;
  border-bottom: 2px solid #4a90e2;
  padding-bottom: 8px;
}

.ptg-study-tip-list {
  list-style: none;
  margin: 10px 0;
  padding: 0;
}

.ptg-study-tip-list li {
  margin-bottom: 10px;
  padding-left: 24px;
  position: relative;
  color: #555;
  line-height: 1.6;
  font-size: 15px;
}

.ptg-study-tip-list li::before {
  content: "•";
  position: absolute;
  left: 0;
  color: #4a90e2;
  font-weight: 700;
}

.ptg-study-tip-list--sub li {
  color: #444;
  font-size: 14px;
}

.ptg-tip-block {
  background: #f8f9fa;
  border-radius: 8px;
  padding: 15px;
  margin-bottom: 15px;
}

.ptg-tip-block:last-child {
  margin-bottom: 0;
}

.ptg-tip-block h5 {
  margin: 0 0 10px 0;
  color: #333;
  font-size: 16px;
}

.ptg-tip-legend {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: 10px;
}

.ptg-chip {
  display: inline-flex;
  align-items: center;
  padding: 6px 12px;
  border-radius: 16px;
  background: #eff6ff;
  color: #1d4ed8;
  font-size: 13px;
  font-weight: 600;
  border: 1px solid #dbeafe;
}

@keyframes ptg-quiz-tip-modal-fade-in {
  from {
    opacity: 0;
    transform: scale(0.95);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

.ptg-header-row {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 20px;
}
.ptg-header-row h2,
.ptg-header-row h3 {
  margin: 0;
}

/* Memo Tool Area */
/* Memo Tool Area */
.memo-toggle-area {
  margin-top: 15px;
  padding: 15px;
  background-color: #fff;
  border: 1px solid #e2e8f0;
  border-radius: 8px;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.memo-input {
  width: 100%;
  min-height: 100px;
  padding: 12px;
  border: 1px solid #cbd5e0;
  border-radius: 6px;
  font-family: inherit;
  font-size: 0.95rem;
  line-height: 1.5;
  resize: vertical;
  margin-bottom: 0;
  box-sizing: border-box;
  transition:
    border-color 0.2s,
    box-shadow 0.2s;
}

.memo-input:focus {
  outline: none;
  border-color: #4a90e2;
  box-shadow: 0 0 0 3px rgba(74, 144, 226, 0.1);
}

.memo-input:disabled {
  background-color: #f7fafc;
  cursor: not-allowed;
}

.memo-actions {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  margin-top: 8px;
  min-height: 20px;
}

.memo-save-status {
  font-size: 0.85rem;
  font-weight: 500;
  animation: fadeIn 0.3s ease;
}

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

.memo-actions {
  display: flex;
  justify-content: flex-end;
}

/* Modal Styles (for Memo and Flashcard) */
.ptg-modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 100000 !important; /* Above toolbar (20000) */
  display: none;
}

.ptg-modal-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(3px);
}

.ptg-modal-content {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: #fff;
  border-radius: 12px;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
  width: 90%;
  max-width: 600px;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  animation: ptg-modal-fade-in 0.3s ease;
}

@keyframes ptg-modal-fade-in {
  from {
    opacity: 0;
    transform: translate(-50%, -45%);
  }
  to {
    opacity: 1;
    transform: translate(-50%, -50%);
  }
}

.ptg-modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  border-bottom: 1px solid #e5e7eb;
  background: linear-gradient(135deg, #4a90e2 0%, #357abd 100%);
  color: #fff;
  border-top-left-radius: 12px;
  border-top-right-radius: 12px;
}

.ptg-modal-header h3 {
  margin: 0;
  font-size: 20px;
  font-weight: 600;
  color: #fff;
}

.ptg-modal-close {
  background: #fff;
  border: none;
  color: #1d3f7c;
  font-size: 28px;
  line-height: 1;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease;
}

.ptg-modal-close:hover {
  background: #f0f4ff;
  transform: scale(1.1);
}

.ptg-modal-body {
  padding: 24px;
  overflow-y: auto;
  flex: 1;
}

.ptg-modal-body textarea {
  width: 100%;
  min-height: 150px;
  padding: 12px;
  border: 1px solid #cbd5e0;
  border-radius: 6px;
  font-family: inherit;
  font-size: 14px;
  line-height: 1.6;
  resize: vertical;
  box-sizing: border-box;
  transition:
    border-color 0.2s,
    box-shadow 0.2s;
}

.ptg-modal-body textarea:focus {
  outline: none;
  border-color: #4a90e2;
  box-shadow: 0 0 0 3px rgba(74, 144, 226, 0.1);
}

.ptg-modal-body .form-group {
  margin-bottom: 16px;
}

.ptg-modal-body .form-group:last-child {
  margin-bottom: 0;
}

.ptg-modal-body .form-group label {
  display: block;
  margin-bottom: 8px;
  font-weight: 600;
  color: #333;
  font-size: 14px;
}

.ptg-modal-footer {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 12px;
  padding: 16px 24px;
  border-top: 1px solid #e5e7eb;
  background: #f9fafb;
  border-bottom-left-radius: 12px;
  border-bottom-right-radius: 12px;
}

/* Button Styles */
.ptg-btn {
  padding: 10px 20px;
  border-radius: 6px;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
  border: none;
  outline: none;
}

.ptg-btn-primary {
  background: #4a90e2;
  color: #fff;
  border: 1px solid #4a90e2;
}

.ptg-btn-primary:hover {
  background: #357abd;
  border-color: #357abd;
}

.ptg-btn-secondary {
  background: #fff;
  color: #333;
  border: 1px solid #cbd5e0;
}

.ptg-btn-secondary:hover {
  background: #f7fafc;
  border-color: #a0aec0;
}

.ptg-btn-tertiary {
  background: transparent;
  color: #666;
  border: 1px solid #ddd;
}

.ptg-btn-tertiary:hover {
  background: #f5f5f5;
  border-color: #999;
}

@media (max-width: 900px) {
  .ptg-modal-content {
    width: 95%;
    max-height: 85vh;
  }

  .ptg-modal-header,
  .ptg-modal-body,
  .ptg-modal-footer {
    padding: 16px;
  }

  .ptg-lesson-item.ptg-quiz-card {
    padding-left: 5px;
    padding-right: 5px;
  }
  .ptg-study-tip-body {
    padding: 24px 20px;
  }

  .ptg-study-tip-header {
    padding: 20px;
  }

  .ptg-lesson-view {
    max-width: 100%;
    padding: 0px;
  }

  .ptg-subject-list {
    flex-direction: column;
    gap: 8px;
  }
  .ptg-subject-item {
    width: 100%;
    text-align: center;
  }
  .ptg-study-container {
    max-width: 100%;
    width: 100%;
    left: 0;
    transform: none;
  }
  .ptg-session-grid-2col {
    grid-template-columns: 1fr;
  }
  .ptg-course-categories {
    grid-template-columns: 1fr;
  }

  /* Hide Drawing Tool on Mobile (Phones only, show on Tablets 768px+) */
  @media (max-width: 767px) {
    .ptg-btn-drawing,
    .ptg-toolbar-icons .ptg-btn-drawing,
    .ptg-question-toolbar .ptg-btn-drawing,
    button.ptg-btn-drawing {
      display: none !important;
      visibility: hidden !important;
      width: 0 !important;
      height: 0 !important;
      padding: 0 !important;
      margin: 0 !important;
      opacity: 0 !important;
      pointer-events: none !important;
    }
  }
}

/* Toolbar Buttons - Pure Icon Style (No Feedback) */
.ptg-toolbar-btn {
  position: relative;
  background: transparent;
  border: none;
  width: 30px;
  height: 30px;
  padding: 0;
  margin: 0 2px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  outline: none;
  border-radius: 4px;
}

.ptg-toolbar-btn::before {
  display: none;
}

.ptg-toolbar-btn:hover,
.ptg-toolbar-btn:active,
.ptg-toolbar-btn.is-active,
.ptg-toolbar-btn.is-active:hover {
  background: transparent !important;
  border: none !important;
  box-shadow: none !important;
  transform: none !important;
  opacity: 1 !important;
}

/* Toolbar Icon Styling */
.ptg-toolbar-btn .ptg-toolbar-icon,
.ptg-toolbar-btn img,
.ptg-toolbar-btn svg {
  display: inline-block;
  width: 20px !important;
  height: 20px !important;
  transition: none;
  filter: none !important; /* Always show original icon color */
}

/* Remove hover/active icon effects */
.ptg-toolbar-btn:hover .ptg-toolbar-icon,
.ptg-toolbar-btn:hover img,
.ptg-toolbar-btn:hover svg,
.ptg-toolbar-btn.is-active .ptg-toolbar-icon,
.ptg-toolbar-btn.is-active img,
.ptg-toolbar-btn.is-active svg {
  filter: none !important;
  transform: none !important;
  animation: none !important;
}

/* Specific button overrides - ensure no specific color shifts */
.ptg-btn-bookmark:hover .ptg-toolbar-icon,
.ptg-btn-review:hover .ptg-toolbar-icon,
.ptg-btn-notes:hover .ptg-toolbar-icon,
.ptg-btn-flashcard:hover .ptg-toolbar-icon {
  filter: none !important;
}