/* Components CSS */

/* ANIMATIONS */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes slideUp {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes popStar {
  0% { transform: scale(0.6); opacity: 0; }
  70% { transform: scale(1.2); }
  100% { transform: scale(1); opacity: 1; }
}

.animate-fade-in {
  animation: fadeIn 0.3s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.animate-slide-up {
  animation: slideUp 0.3s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

/* THEORY / CHEAT SHEET VIEW */
.theory-view-container {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 30px;
  box-shadow: var(--shadow-md);
  margin-bottom: 30px;
}

.theory-top-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
}

.theory-header {
  border-bottom: 1px solid var(--border-subtle);
  padding-bottom: 20px;
  margin-bottom: 24px;
}

.theory-title-row {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 8px;
}

.theory-icon {
  font-size: 2.2rem;
}

.theory-title {
  font-size: 1.6rem;
  font-weight: 900;
  letter-spacing: -0.5px;
}

.theory-lead {
  font-size: 1.05rem;
  color: var(--text-muted);
  line-height: 1.6;
}

.theory-section {
  background-color: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 20px;
  margin-bottom: 18px;
}

.theory-section-heading {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--primary-light);
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}

[data-theme="light"] .theory-section-heading {
  color: var(--primary);
}

.theory-points-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.theory-points-list li {
  position: relative;
  padding-left: 24px;
  font-size: 0.95rem;
  color: var(--text-main);
  line-height: 1.6;
}

.theory-points-list li::before {
  content: '▸';
  position: absolute;
  left: 4px;
  color: var(--primary);
  font-weight: 900;
  font-size: 1.1rem;
}

.theory-points-list strong {
  color: #38bdf8;
  font-weight: 700;
}

[data-theme="light"] .theory-points-list strong {
  color: #0284c7;
}

.theory-points-list u {
  text-decoration-color: #f59e0b;
  text-underline-offset: 3px;
}

.theory-bottom-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 14px;
  margin-top: 28px;
  padding-top: 20px;
  border-top: 1px solid var(--border-subtle);
}

/* QUIZ ENGINE COMPONENTS */
.quiz-container {
  max-width: 720px;
  margin: 0 auto;
}

.quiz-topbar {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 20px;
}

.quiz-progress-wrap {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.quiz-progress-bar {
  width: 100%;
  height: 10px;
  background-color: var(--bg-card);
  border-radius: var(--radius-full);
  overflow: hidden;
  border: 1px solid var(--border-subtle);
}

.quiz-progress-fill {
  height: 100%;
  background: linear-gradient(90deg, #6366f1 0%, #38bdf8 100%);
  border-radius: var(--radius-full);
  transition: width 0.3s ease;
}

.quiz-progress-text {
  font-size: 0.8rem;
  color: var(--text-dim);
  font-weight: 600;
}

.quiz-score-badge {
  display: flex;
  align-items: center;
  gap: 6px;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  padding: 6px 14px;
  border-radius: var(--radius-full);
  font-size: 0.95rem;
  font-weight: 800;
  color: #fbbf24;
}

/* Question card */
.quiz-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 26px;
  box-shadow: var(--shadow-md);
  margin-bottom: 20px;
}

.quiz-type-badge {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--badge-text);
  background-color: var(--badge-bg);
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  margin-bottom: 12px;
}

.quiz-prompt {
  font-size: 1.25rem;
  font-weight: 800;
  line-height: 1.4;
  margin-bottom: 18px;
}

.quiz-sentence-box {
  background-color: var(--bg-card);
  border-left: 4px solid var(--primary);
  border-radius: var(--radius-sm);
  padding: 16px 20px;
  margin-bottom: 22px;
}

.quiz-sentence {
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--text-main);
  letter-spacing: 0.2px;
}

.quiz-blank {
  color: var(--primary);
  font-weight: 800;
  text-decoration: underline;
  text-underline-offset: 4px;
}

/* Multiple choice buttons */
.choice-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.choice-btn {
  background-color: var(--bg-card);
  border: 2px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 14px 18px;
  display: flex;
  align-items: center;
  gap: 14px;
  color: var(--text-main);
  font-family: inherit;
  font-size: 1.05rem;
  font-weight: 600;
  text-align: left;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.choice-btn:hover:not(:disabled) {
  background-color: var(--bg-card-hover);
  border-color: var(--border-focus);
  transform: translateX(4px);
}

.choice-letter {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  background-color: var(--bg-input);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  font-weight: 800;
  color: var(--text-muted);
  flex-shrink: 0;
}

.choice-btn:hover:not(:disabled) .choice-letter {
  background-color: var(--primary);
  color: #ffffff;
}

.choice-correct {
  background-color: var(--success-bg) !important;
  border-color: var(--success-border) !important;
  color: var(--success-text) !important;
}

.choice-correct .choice-letter {
  background-color: var(--success-border) !important;
  color: #ffffff !important;
}

.choice-wrong {
  background-color: var(--error-bg) !important;
  border-color: var(--error-border) !important;
  color: var(--error-text) !important;
}

.choice-wrong .choice-letter {
  background-color: var(--error-border) !important;
  color: #ffffff !important;
}

/* Fill-in-the-blank input */
.fill-sentence-wrap {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  font-size: 1.2rem;
  font-weight: 600;
  background-color: var(--bg-card);
  padding: 20px;
  border-radius: var(--radius-md);
  margin-bottom: 10px;
}

.fill-input-group {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.fill-input {
  background-color: var(--bg-input);
  border: 2px solid var(--border-card);
  border-radius: var(--radius-sm);
  color: var(--text-main);
  font-family: inherit;
  font-size: 1.15rem;
  font-weight: 700;
  padding: 8px 14px;
  width: 170px;
  outline: none;
  transition: all var(--transition-fast);
}

.fill-input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 10px var(--primary-glow);
}

.input-correct {
  border-color: var(--success-border) !important;
  background-color: var(--success-bg) !important;
  color: var(--success-text) !important;
}

.input-wrong {
  border-color: var(--error-border) !important;
  background-color: var(--error-bg) !important;
  color: var(--error-text) !important;
}

/* Word Reorder Component */
.reorder-wrap {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.reorder-tray-title, .reorder-bank-title {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-muted);
}

.reorder-tray {
  min-height: 70px;
  background-color: var(--bg-input);
  border: 2px dashed var(--border-card);
  border-radius: var(--radius-md);
  padding: 12px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  transition: all var(--transition-fast);
}

.reorder-tray-correct {
  border-style: solid;
  border-color: var(--success-border) !important;
  background-color: var(--success-bg) !important;
}

.reorder-tray-wrong {
  border-style: solid;
  border-color: var(--error-border) !important;
  background-color: var(--error-bg) !important;
}

.reorder-placeholder {
  color: var(--text-dim);
  font-size: 0.9rem;
  font-style: italic;
}

.reorder-bank {
  background-color: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 16px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  min-height: 60px;
}

.word-tile {
  background: var(--bg-surface);
  border: 1.5px solid var(--border-card);
  color: var(--text-main);
  font-family: inherit;
  font-size: 1rem;
  font-weight: 700;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-fast);
  user-select: none;
}

.word-tile:hover {
  border-color: var(--primary);
  background-color: var(--bg-card-hover);
  transform: translateY(-2px);
}

.word-tile-selected {
  background: linear-gradient(135deg, var(--primary) 0%, #6366f1 100%);
  color: #ffffff;
  border-color: transparent;
}

.word-tile-selected:hover {
  opacity: 0.85;
}

.reorder-actions {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

/* Feedback & Explanation Box */
.quiz-feedback-box {
  margin-top: 20px;
  padding: 16px 20px;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
}

.feedback-success {
  background-color: var(--success-bg);
  border-color: var(--success-border);
}

.feedback-wrong {
  background-color: var(--error-bg);
  border-color: var(--error-border);
}

.feedback-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 8px;
}

.feedback-icon {
  font-size: 1.25rem;
}

.feedback-title {
  font-size: 1.05rem;
  font-weight: 800;
}

.feedback-correct-answer {
  margin-bottom: 8px;
  font-size: 0.95rem;
  color: var(--text-main);
}

.feedback-correct-answer span {
  font-weight: 800;
  color: var(--success-text);
  background: rgba(16, 185, 129, 0.2);
  padding: 2px 8px;
  border-radius: 4px;
}

.feedback-explanation {
  font-size: 0.95rem;
  color: var(--text-main);
  line-height: 1.5;
  background: rgba(0, 0, 0, 0.15);
  padding: 10px 14px;
  border-radius: var(--radius-sm);
}

/* Quiz Footer */
.quiz-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  flex-wrap: wrap;
}

.quiz-hint-text {
  width: 100%;
  background-color: var(--bg-card);
  border: 1px dashed var(--accent-amber);
  color: var(--accent-amber);
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 600;
}

/* RESULTS SCREEN */
.result-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 36px 24px;
  text-align: center;
  box-shadow: var(--shadow-lg);
}

.result-teacher-avatar {
  width: 110px;
  height: 110px;
  border-radius: 24px;
  margin: 0 auto 16px auto;
  overflow: hidden;
  border: 3px solid var(--primary);
  box-shadow: var(--shadow-glow);
}

.result-teacher-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 25% 15%;
}

.result-title {
  font-size: 1.7rem;
  font-weight: 900;
  margin-bottom: 8px;
}

.result-stars {
  font-size: 2.2rem;
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-bottom: 18px;
}

.star-filled {
  color: #f59e0b;
  animation: popStar 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275) forwards;
}

.star-empty {
  color: var(--border-card);
}

.result-score-circle {
  display: flex;
  flex-direction: column;
  margin-bottom: 16px;
}

.result-score-percent {
  font-size: 3rem;
  font-weight: 900;
  color: var(--primary);
  line-height: 1;
}

.result-score-fraction {
  font-size: 0.95rem;
  color: var(--text-muted);
  font-weight: 600;
}

.result-message {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-main);
  max-width: 480px;
  margin: 0 auto 24px auto;
  line-height: 1.5;
}

.result-stats-row {
  display: flex;
  justify-content: center;
  gap: 16px;
  margin-bottom: 28px;
}

.result-stat-pill {
  background-color: var(--bg-card);
  border: 1px solid var(--border-subtle);
  padding: 10px 18px;
  border-radius: var(--radius-md);
  display: flex;
  flex-direction: column;
  align-items: center;
}

.stat-pill-label {
  font-size: 0.75rem;
  color: var(--text-dim);
  font-weight: 700;
  text-transform: uppercase;
}

.stat-pill-val {
  font-size: 1.1rem;
  font-weight: 800;
  color: #38bdf8;
}

.result-buttons {
  display: flex;
  justify-content: center;
  gap: 14px;
}

/* IRREGULAR VERBS TABLE */
.verbs-container {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-md);
}

.verbs-header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
  flex-wrap: wrap;
  gap: 12px;
}

.verbs-search-input {
  background-color: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  padding: 10px 16px;
  font-size: 0.95rem;
  color: var(--text-main);
  outline: none;
  width: 260px;
  transition: all var(--transition-fast);
}

.verbs-search-input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 10px var(--primary-glow);
}

.verbs-table-wrap {
  overflow-x: auto;
}

.verbs-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
}

.verbs-table th {
  padding: 12px 14px;
  font-size: 0.8rem;
  font-weight: 800;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  border-bottom: 2px solid var(--border-subtle);
}

.verbs-table td {
  padding: 12px 14px;
  font-size: 0.95rem;
  border-bottom: 1px solid var(--border-subtle);
}

.verbs-table tr:hover td {
  background-color: var(--bg-card-hover);
}

.verb-base {
  font-weight: 800;
  color: #38bdf8;
}

.verb-past {
  font-weight: 700;
  color: #fbbf24;
}

.verb-pp {
  font-weight: 600;
  color: #a78bfa;
}

.verb-sk {
  color: var(--text-muted);
}

/* Grade Filter Bar for School Navigation */
.grade-filter-section {
  margin-bottom: 24px;
}

.grade-filter-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
  flex-wrap: wrap;
  gap: 8px;
}

.grade-filter-label {
  font-size: 0.85rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.6px;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 6px;
}

.grade-filter-bar {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding: 4px 2px 10px 2px;
  scrollbar-width: thin;
  -webkit-overflow-scrolling: touch;
}

.grade-pill {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-full);
  padding: 8px 16px;
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--text-muted);
  cursor: pointer;
  white-space: nowrap;
  transition: all var(--transition-fast);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  user-select: none;
}

.grade-pill:hover {
  background-color: var(--bg-card-hover);
  color: var(--text-main);
  border-color: var(--border-focus);
}

.grade-pill.active {
  background-color: var(--primary);
  color: #fff;
  border-color: var(--primary);
  box-shadow: 0 0 14px var(--primary-glow);
}

.grade-pill-highlight {
  border-color: rgba(16, 185, 129, 0.45);
  color: #34d399;
}

.grade-pill-highlight:hover {
  border-color: #10b981;
}

.grade-pill-highlight.active {
  background: linear-gradient(135deg, #059669, #10b981);
  color: #fff;
  border-color: transparent;
  box-shadow: 0 0 16px rgba(16, 185, 129, 0.4);
}

.topic-meta-badges {
  display: flex;
  gap: 6px;
  margin-bottom: 8px;
  flex-wrap: wrap;
}

.badge-grade {
  font-size: 0.72rem;
  font-weight: 800;
  padding: 2px 8px;
  border-radius: 999px;
  background: rgba(99, 102, 241, 0.15);
  color: #a5b4fc;
}

.badge-grade-6 {
  background: rgba(16, 185, 129, 0.2);
  color: #34d399;
}

.badge-category {
  font-size: 0.72rem;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 999px;
  background: var(--badge-bg);
  color: var(--text-muted);
}