* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --gaa-green: #006838;
  --gaa-green-dark: #004d2a;
  --gaa-green-light: #e8f5e9;
  --gaa-gold: #d4a843;
  --gaa-gold-light: #fdf4e0;
  --white: #ffffff;
  --gray-50: #f8f9fa;
  --gray-100: #f0f1f3;
  --gray-200: #dde0e4;
  --gray-500: #6c757d;
  --gray-700: #404850;
  --gray-900: #1a1d21;
  --irish-badge: #e65100;
  --radius: 12px;
  --shadow: 0 2px 8px rgba(0,0,0,0.08);
  --shadow-lg: 0 4px 20px rgba(0,0,0,0.12);
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--gray-50);
  color: var(--gray-900);
  min-height: 100vh;
}

header {
  background: var(--gaa-green);
  color: var(--white);
  text-align: center;
  padding: 1.5rem 1rem;
  box-shadow: var(--shadow);
}

header h1 {
  font-size: 1.8rem;
  font-weight: 700;
  letter-spacing: 0.5px;
}

.subtitle {
  font-size: 0.95rem;
  opacity: 0.85;
  margin-top: 0.25rem;
}

main {
  max-width: 800px;
  margin: 0 auto;
  padding: 1.5rem 1rem;
}

/* SCREENS */
.screen { display: none; }
.screen.active { display: block; }

h2 {
  font-size: 1.4rem;
  margin-bottom: 1rem;
  color: var(--gray-900);
}

/* MODE CARDS */
.mode-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.mode-card {
  background: var(--white);
  border: 2px solid var(--gray-200);
  border-radius: var(--radius);
  padding: 1.5rem;
  text-align: center;
  cursor: pointer;
  transition: all 0.2s;
  font-family: inherit;
  color: var(--gray-900);
}

.mode-card:hover {
  border-color: var(--gaa-green);
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.mode-icon {
  font-size: 2.5rem;
  margin-bottom: 0.75rem;
}

.mode-card h3 {
  font-size: 1.15rem;
  margin-bottom: 0.5rem;
  color: var(--gaa-green);
}

.mode-card p {
  font-size: 0.85rem;
  color: var(--gray-500);
  line-height: 1.4;
}

/* CATEGORY GRID */
.category-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}

.category-btn {
  background: var(--white);
  border: 2px solid var(--gray-200);
  border-radius: var(--radius);
  padding: 0.85rem 1rem;
  font-size: 0.9rem;
  font-family: inherit;
  cursor: pointer;
  transition: all 0.15s;
  text-align: left;
  color: var(--gray-700);
}

.category-btn:hover {
  border-color: var(--gaa-green);
}

.category-btn.selected {
  background: var(--gaa-green-light);
  border-color: var(--gaa-green);
  color: var(--gaa-green-dark);
  font-weight: 600;
}

/* PRACTICE OPTIONS */
.practice-options {
  margin-bottom: 1.5rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.practice-options label {
  font-size: 0.95rem;
  color: var(--gray-700);
}

.practice-options select {
  padding: 0.5rem 0.75rem;
  border: 2px solid var(--gray-200);
  border-radius: 8px;
  font-size: 0.95rem;
  font-family: inherit;
  background: var(--white);
}

.hidden { display: none !important; }

/* AI TOGGLE */
.ai-toggle {
  margin-bottom: 1.25rem;
  text-align: center;
}

.toggle-label {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  color: var(--gray-500);
  cursor: pointer;
}

.toggle-label input[type="checkbox"] {
  accent-color: var(--gaa-green);
  width: 16px;
  height: 16px;
}

/* BUTTONS */
.button-row {
  display: flex;
  gap: 0.75rem;
  justify-content: center;
}

.btn {
  padding: 0.75rem 1.5rem;
  border: none;
  border-radius: 8px;
  font-size: 1rem;
  font-family: inherit;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s;
}

.btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.btn-primary {
  background: var(--gaa-green);
  color: var(--white);
}

.btn-primary:hover:not(:disabled) {
  background: var(--gaa-green-dark);
}

.btn-secondary {
  background: var(--gray-100);
  color: var(--gray-700);
}

.btn-secondary:hover:not(:disabled) {
  background: var(--gray-200);
}

/* LOADING */
.loader {
  width: 48px;
  height: 48px;
  border: 4px solid var(--gray-200);
  border-top-color: var(--gaa-green);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin: 3rem auto 1.5rem;
}

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

.loading-text {
  text-align: center;
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--gray-700);
}

.loading-sub {
  text-align: center;
  font-size: 0.85rem;
  color: var(--gray-500);
  margin-top: 0.5rem;
}

/* FLASHCARD */
.practice-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.25rem;
}

#practice-progress {
  font-weight: 600;
  color: var(--gray-700);
}

.category-badge {
  background: var(--gaa-green-light);
  color: var(--gaa-green-dark);
  padding: 0.3rem 0.75rem;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 600;
}

.flashcard {
  perspective: 1000px;
  height: 280px;
  cursor: pointer;
  margin-bottom: 1rem;
}

.flashcard-inner {
  position: relative;
  width: 100%;
  height: 100%;
  transition: transform 0.5s;
  transform-style: preserve-3d;
}

.flashcard-inner.flipped {
  transform: rotateX(180deg);
}

.flashcard-front,
.flashcard-back {
  position: absolute;
  width: 100%;
  height: 100%;
  backface-visibility: hidden;
  border-radius: var(--radius);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: 2rem;
  text-align: center;
}

.flashcard-front {
  background: var(--white);
  border: 2px solid var(--gray-200);
  box-shadow: var(--shadow);
}

.flashcard-back {
  background: var(--gaa-green);
  color: var(--white);
  transform: rotateX(180deg);
}

.question-text {
  font-size: 1.2rem;
  line-height: 1.5;
  font-weight: 500;
}

.flip-hint {
  margin-top: 1rem;
  font-size: 0.8rem;
  color: var(--gray-500);
}

.answer-label {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  opacity: 0.7;
  margin-bottom: 0.5rem;
}

.answer-text {
  font-size: 1.5rem;
  font-weight: 700;
}

.irish-badge {
  text-align: center;
  margin-bottom: 1rem;
}

.irish-badge:not(.hidden) {
  background: var(--irish-badge);
  color: var(--white);
  display: inline-block;
  padding: 0.25rem 0.75rem;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 600;
  margin-left: auto;
  margin-right: auto;
}

/* TRANSLATION */
.translation-container {
  text-align: center;
  margin-bottom: 1rem;
}

.btn-translation {
  background: none;
  border: 1px solid var(--irish-badge);
  border-radius: 20px;
  padding: 0.3rem 0.85rem;
  font-size: 0.8rem;
  font-family: inherit;
  color: var(--irish-badge);
  cursor: pointer;
  transition: all 0.15s;
}

.btn-translation:hover {
  background: var(--irish-badge);
  color: var(--white);
}

.translation-text {
  font-size: 0.9rem;
  color: var(--gray-500);
  font-style: italic;
  margin-top: 0.5rem;
}

.q-translation {
  margin-top: 0.3rem;
}

.btn-translation-small {
  background: none;
  border: 1px solid var(--irish-badge);
  border-radius: 12px;
  padding: 0.15rem 0.5rem;
  font-size: 0.7rem;
  font-family: inherit;
  color: var(--irish-badge);
  cursor: pointer;
  transition: all 0.15s;
}

.btn-translation-small:hover {
  background: var(--irish-badge);
  color: var(--white);
}

.q-translation-text {
  font-size: 0.85rem;
  color: var(--gray-500);
  font-style: italic;
  margin-left: 0.5rem;
}

.practice-controls {
  display: flex;
  gap: 0.75rem;
  justify-content: center;
}

/* QUIZ MODE */
.quiz-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 1.5rem;
}

.round-info h2 {
  margin-bottom: 0.35rem;
}

.timer {
  background: var(--gaa-gold-light);
  color: var(--gray-900);
  font-size: 1.6rem;
  font-weight: 700;
  padding: 0.5rem 1rem;
  border-radius: var(--radius);
  min-width: 80px;
  text-align: center;
  font-variant-numeric: tabular-nums;
}

.timer.warning {
  background: #fff3cd;
  color: #856404;
}

.timer.danger {
  background: #f8d7da;
  color: #842029;
  animation: pulse 1s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.6; }
}

.quiz-questions {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}

.quiz-question-row {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: 8px;
  padding: 0.85rem 1rem;
  display: flex;
  gap: 0.75rem;
  align-items: flex-start;
}

.quiz-question-row.irish {
  border-left: 3px solid var(--irish-badge);
}

.q-number {
  background: var(--gaa-green-light);
  color: var(--gaa-green-dark);
  font-weight: 700;
  font-size: 0.85rem;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.q-content {
  flex: 1;
}

.q-text {
  font-size: 0.95rem;
  line-height: 1.45;
}

.q-answer {
  margin-top: 0.5rem;
  font-weight: 700;
  color: var(--gaa-green);
  display: none;
}

.q-answer.visible {
  display: block;
}

.quiz-controls {
  display: flex;
  gap: 0.75rem;
  justify-content: center;
}

/* FLAG BUTTON */
.btn-flag {
  background: #fff3cd;
  color: #856404;
  border: 1px solid #ffc107;
  font-size: 0.85rem;
  padding: 0.6rem 1rem;
}

.btn-flag:hover {
  background: #ffc107;
  color: #533f03;
}

.btn-danger {
  background: #dc3545;
  color: var(--white);
  border: none;
}

.btn-danger:hover {
  background: #b02a37;
}

.btn-flag-small {
  background: none;
  border: 1px solid var(--gray-200);
  border-radius: 6px;
  padding: 0.3rem 0.6rem;
  font-size: 0.75rem;
  font-family: inherit;
  color: var(--gray-500);
  cursor: pointer;
  flex-shrink: 0;
  align-self: center;
  transition: all 0.15s;
}

.btn-flag-small:hover {
  background: #fff3cd;
  border-color: #ffc107;
  color: #856404;
}

.btn-remove-small {
  background: none;
  border: 1px solid var(--gray-200);
  border-radius: 6px;
  padding: 0.3rem 0.6rem;
  font-size: 0.75rem;
  font-family: inherit;
  color: var(--gray-500);
  cursor: pointer;
  flex-shrink: 0;
  align-self: center;
  transition: all 0.15s;
}

.btn-remove-small:hover {
  background: #f8d7da;
  border-color: #dc3545;
  color: #842029;
}

.q-actions {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  flex-shrink: 0;
}

/* MODAL */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 1rem;
}

.modal-overlay.hidden {
  display: none;
}

.modal {
  background: var(--white);
  border-radius: var(--radius);
  padding: 1.5rem;
  max-width: 480px;
  width: 100%;
  box-shadow: var(--shadow-lg);
  max-height: 90vh;
  overflow-y: auto;
}

.modal h3 {
  font-size: 1.15rem;
  margin-bottom: 0.75rem;
  color: var(--gray-900);
}

.modal-preview {
  font-size: 0.9rem;
  color: var(--gray-700);
  background: var(--gray-50);
  padding: 0.6rem 0.75rem;
  border-radius: 8px;
  margin-bottom: 0.5rem;
  line-height: 1.4;
}

.modal-answer-preview {
  font-weight: 600;
  color: var(--gaa-green-dark);
}

.modal-label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--gray-700);
  margin-top: 0.75rem;
  margin-bottom: 0.35rem;
}

.feedback-type-btns {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.feedback-type-btn {
  background: var(--white);
  border: 2px solid var(--gray-200);
  border-radius: 8px;
  padding: 0.45rem 0.85rem;
  font-size: 0.85rem;
  font-family: inherit;
  cursor: pointer;
  transition: all 0.15s;
  color: var(--gray-700);
}

.feedback-type-btn:hover {
  border-color: var(--gaa-green);
}

.feedback-type-btn.selected {
  background: var(--gaa-green-light);
  border-color: var(--gaa-green);
  color: var(--gaa-green-dark);
  font-weight: 600;
}

.modal-input {
  width: 100%;
  padding: 0.55rem 0.75rem;
  border: 2px solid var(--gray-200);
  border-radius: 8px;
  font-size: 0.9rem;
  font-family: inherit;
  color: var(--gray-900);
  transition: border-color 0.15s;
}

.modal-input:focus {
  outline: none;
  border-color: var(--gaa-green);
}

.modal-textarea {
  min-height: 60px;
  resize: vertical;
}

/* TOAST */
.toast {
  position: fixed;
  bottom: 1.5rem;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: var(--gaa-green);
  color: var(--white);
  padding: 0.65rem 1.25rem;
  border-radius: 8px;
  font-size: 0.9rem;
  font-weight: 600;
  box-shadow: var(--shadow-lg);
  opacity: 0;
  transition: all 0.3s;
  z-index: 2000;
}

.toast.visible {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* FEEDBACK REVIEW */
.feedback-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.feedback-card {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  padding: 1rem;
}

.feedback-card.resolved {
  opacity: 0.6;
  border-left: 3px solid var(--gaa-green);
}

.feedback-card-header {
  display: flex;
  gap: 0.5rem;
  align-items: center;
  flex-wrap: wrap;
  margin-bottom: 0.5rem;
}

.feedback-type-label {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
}

.feedback-type-wrong_answer {
  background: #f8d7da;
  color: #842029;
}

.feedback-type-unclear {
  background: #fff3cd;
  color: #856404;
}

.feedback-type-too_easy {
  background: #e2e3ff;
  color: #3d348b;
}

.feedback-type-outdated {
  background: #cff4fc;
  color: #055160;
}

.feedback-type-other {
  background: var(--gray-100);
  color: var(--gray-700);
}

.feedback-category {
  font-size: 0.75rem;
  color: var(--gray-500);
}

.feedback-resolved-badge {
  font-size: 0.7rem;
  font-weight: 700;
  background: var(--gaa-green-light);
  color: var(--gaa-green-dark);
  padding: 0.15rem 0.4rem;
  border-radius: 4px;
}

.feedback-ai-badge {
  font-size: 0.7rem;
  font-weight: 700;
  background: #e8daef;
  color: #6c3483;
  padding: 0.15rem 0.4rem;
  border-radius: 4px;
}

.feedback-question {
  font-size: 0.95rem;
  font-weight: 500;
  margin-bottom: 0.3rem;
}

.feedback-current-answer {
  font-size: 0.85rem;
  color: var(--gray-500);
}

.feedback-suggested {
  font-size: 0.85rem;
  color: var(--gaa-green-dark);
  margin-top: 0.25rem;
}

.feedback-comment-text {
  font-size: 0.85rem;
  color: var(--gray-700);
  margin-top: 0.35rem;
  font-style: italic;
}

.feedback-details-section {
  background: var(--gray-50, #f8f9fa);
  border: 1px solid var(--gray-200);
  border-left: 3px solid var(--gaa-green);
  border-radius: 4px;
  padding: 0.75rem;
  margin-top: 0.5rem;
}

.feedback-detail-row {
  font-size: 0.9rem;
  margin-top: 0.35rem;
}

.feedback-detail-label {
  font-size: 0.9rem;
  color: var(--gray-700);
}

.feedback-detail-empty {
  color: var(--gray-500);
  font-style: italic;
  font-size: 0.85rem;
}

.feedback-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0.75rem;
}

.btn-sm {
  padding: 0.35rem 0.75rem;
  font-size: 0.8rem;
}

.btn-danger-text {
  color: #842029;
}

.btn-danger-text:hover {
  background: #f8d7da;
}

.feedback-edit-form {
  margin-top: 0.75rem;
  padding: 0.75rem;
  background: var(--gray-100, #f5f5f5);
  border-radius: 6px;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.feedback-edit-form.hidden {
  display: none;
}

.feedback-edit-form label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--gray-700, #555);
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.feedback-edit-form textarea,
.feedback-edit-form input[type="text"] {
  width: 100%;
  padding: 0.4rem 0.5rem;
  font-size: 0.85rem;
  border: 1px solid var(--gray-300, #ccc);
  border-radius: 4px;
  font-family: inherit;
  box-sizing: border-box;
}

.feedback-edit-actions {
  display: flex;
  gap: 0.5rem;
  margin-top: 0.25rem;
}

/* UPLOAD QUESTIONS */
.upload-format-help {
  background: var(--gray-50);
  border: 1px solid var(--gray-200);
  border-radius: 8px;
  padding: 0.75rem 1rem;
  margin-bottom: 1rem;
  font-size: 0.85rem;
  color: var(--gray-700);
  line-height: 1.6;
}

.upload-format-help code {
  background: var(--gray-100);
  padding: 0.1rem 0.35rem;
  border-radius: 4px;
  font-size: 0.8rem;
}

.upload-preview {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: 8px;
  padding: 1rem;
  margin-top: 1rem;
  max-height: 300px;
  overflow-y: auto;
}

.upload-preview h4 {
  font-size: 0.9rem;
  color: var(--gray-700);
  margin-bottom: 0.75rem;
}

.upload-preview-item {
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--gray-100);
  font-size: 0.85rem;
  line-height: 1.5;
}

.upload-preview-item:last-child {
  border-bottom: none;
}

.upload-preview-answer {
  color: var(--gaa-green);
  font-weight: 600;
  font-size: 0.85rem;
}

.about-content {
  background: var(--white);
  border-radius: var(--radius);
  padding: 1.25rem;
  box-shadow: var(--shadow);
  line-height: 1.6;
}

.about-content p {
  margin-bottom: 0.75rem;
}

.about-content p:last-child {
  margin-bottom: 0;
}

.upload-hint {
  font-size: 0.85rem;
  color: var(--gray-500);
  margin-bottom: 0.5rem;
  line-height: 1.4;
}

.upload-hint code {
  background: var(--gray-100);
  padding: 0.1rem 0.35rem;
  border-radius: 4px;
  font-size: 0.85rem;
}

.tab-description {
  font-size: 0.9rem;
  color: var(--gray-500);
  margin-bottom: 1rem;
  line-height: 1.5;
}

/* RESPONSIVE */
@media (max-width: 600px) {
  .mode-cards {
    grid-template-columns: 1fr;
  }

  .category-grid {
    grid-template-columns: 1fr;
  }

  header h1 {
    font-size: 1.4rem;
  }

  .flashcard {
    height: 240px;
  }

  .question-text {
    font-size: 1.05rem;
  }

  .answer-text {
    font-size: 1.25rem;
  }

  .timer {
    font-size: 1.3rem;
  }
}

/* Difficulty rating */
.difficulty-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  margin-top: 0.75rem;
}

.difficulty-prompt {
  font-size: 0.85rem;
  color: var(--gray-500);
}

.btn-difficulty {
  padding: 0.3rem 0.9rem;
  border-radius: var(--radius);
  border: 1px solid var(--gray-200);
  background: var(--white);
  cursor: pointer;
  font-size: 0.85rem;
  font-weight: 500;
  transition: all 0.15s;
}

.btn-easy:hover {
  background: #d1fae5;
  border-color: #6ee7b7;
  color: #065f46;
}

.btn-hard:hover {
  background: #fee2e2;
  border-color: #fca5a5;
  color: #991b1b;
}

.difficulty-thanks {
  font-size: 0.85rem;
  color: var(--gray-500);
  font-style: italic;
}

.difficulty-badge {
  font-size: 0.7rem;
  padding: 0.1rem 0.4rem;
  border-radius: 4px;
  font-weight: 500;
}

.difficulty-badge.mostly-easy {
  background: #d1fae5;
  color: #065f46;
}

.difficulty-badge.mostly-hard {
  background: #fee2e2;
  color: #991b1b;
}

.difficulty-badge.mixed {
  background: #fef3c7;
  color: #92400e;
}

/* WELCOME PANEL */
.welcome-panel {
  background: var(--gaa-green-light);
  border-left: 3px solid var(--gaa-green);
  border-radius: var(--radius);
  padding: 0.85rem 1rem;
  margin-top: 0.5rem;
  margin-bottom: 0.5rem;
  font-size: 0.88rem;
  color: var(--gray-700);
  line-height: 1.5;
}

/* Data/GDPR notice */
.data-notice {
  font-size: 0.75rem;
  color: var(--gray-500);
  line-height: 1.4;
  margin-top: 0.75rem;
  padding: 0.5rem 0.65rem;
  background: var(--gray-50, #f9fafb);
  border-radius: var(--radius);
  border: 1px solid var(--gray-200);
}