/* ==========================================================================
   DEUTSCHMEISTER - LESSON & EXERCISE STYLES
   Componenti Didattici, Esercizi Interattivi, Audio & Pronuncia
   ========================================================================== */

/* Lesson Header & Navigation Bar */
.lesson-nav-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 2rem;
  padding-bottom: 1.25rem;
  border-bottom: 1px solid var(--border-subtle);
  flex-wrap: wrap;
  gap: 1rem;
}

.lesson-breadcrumbs {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.88rem;
  color: var(--text-muted);
}

.lesson-breadcrumbs a:hover {
  color: var(--gold-400);
}

.save-indicator {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-size: 0.8rem;
  color: var(--text-muted);
  background: var(--bg-surface-elevated);
  padding: 0.35rem 0.85rem;
  border-radius: var(--radius-pill);
  border: 1px solid var(--border-subtle);
}

.save-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--emerald-500);
  box-shadow: 0 0 8px var(--emerald-500);
}

.save-dot.saving {
  background-color: var(--gold-500);
  box-shadow: 0 0 8px var(--gold-500);
  animation: pulse 1s infinite;
}

@keyframes pulse {
  0% { opacity: 0.4; }
  50% { opacity: 1; }
  100% { opacity: 0.4; }
}

/* Lesson Hero */
.lesson-hero {
  background: linear-gradient(135deg, var(--bg-surface) 0%, var(--bg-surface-elevated) 100%);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 2.25rem;
  margin-bottom: 2.5rem;
  position: relative;
  box-shadow: var(--shadow-sm);
}

.lesson-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 0.3rem 0.75rem;
  background: rgba(245, 158, 11, 0.15);
  border: 1px solid rgba(245, 158, 11, 0.3);
  color: var(--gold-400);
  border-radius: var(--radius-pill);
  margin-bottom: 0.85rem;
}

.lesson-title {
  font-size: 2.25rem;
  margin-bottom: 0.75rem;
}

.lesson-goal {
  color: var(--text-secondary);
  font-size: 1.05rem;
  max-width: 800px;
  line-height: 1.6;
}

/* Sections Layout */
.lesson-section {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 2rem;
  margin-bottom: 2.5rem;
  box-shadow: var(--shadow-sm);
}

.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.5rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border-subtle);
}

.section-title {
  font-size: 1.45rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.section-title .icon {
  color: var(--gold-400);
}

/* Grammar Theory Cards & Gender Badges */
.grammar-card {
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  margin-bottom: 1.5rem;
}

.grammar-card h4 {
  font-size: 1.15rem;
  color: var(--gold-400);
  margin-bottom: 0.75rem;
}

.grammar-table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.25rem 0;
  font-size: 0.92rem;
}

.grammar-table th, .grammar-table td {
  padding: 0.85rem 1rem;
  text-align: left;
  border-bottom: 1px solid var(--border-subtle);
}

.grammar-table th {
  background: var(--bg-surface);
  color: var(--text-secondary);
  font-weight: 600;
  text-transform: uppercase;
  font-size: 0.75rem;
  letter-spacing: 0.05em;
}

.grammar-table tr:hover td {
  background: var(--bg-surface-hover);
}

/* Gender Color Highlighting */
.der, .maskulin {
  color: var(--gender-maskulin);
  font-weight: 700;
}
.die, .feminin {
  color: var(--gender-feminin);
  font-weight: 700;
}
.das, .neutral {
  color: var(--gender-neutral);
  font-weight: 700;
}
.plural {
  color: var(--gender-plural);
  font-weight: 700;
}

.gender-chip {
  display: inline-block;
  padding: 0.15rem 0.45rem;
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 700;
  margin-right: 0.35rem;
}
.gender-chip.der { background: rgba(59, 130, 246, 0.15); border: 1px solid rgba(59, 130, 246, 0.3); }
.gender-chip.die { background: rgba(236, 72, 153, 0.15); border: 1px solid rgba(236, 72, 153, 0.3); }
.gender-chip.das { background: rgba(16, 185, 129, 0.15); border: 1px solid rgba(16, 185, 129, 0.3); }

/* Vocabulary Grid */
.vocab-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1rem;
  margin-top: 1.25rem;
}

.vocab-card {
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1.15rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: var(--transition-fast);
}

.vocab-card:hover {
  border-color: var(--border-strong);
  transform: translateY(-2px);
}

.vocab-german {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 0.25rem;
  display: flex;
  align-items: center;
  gap: 0.45rem;
}

.vocab-phonetic {
  font-size: 0.78rem;
  color: var(--text-muted);
  font-family: monospace;
}

.vocab-italian {
  font-size: 0.88rem;
  color: var(--text-secondary);
}

/* Audio & Pronunciation Buttons */
.audio-btn {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  color: var(--gold-400);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition-fast);
  flex-shrink: 0;
}

.audio-btn:hover {
  background: var(--gold-400);
  color: #0f172a;
  transform: scale(1.1);
  box-shadow: 0 0 12px var(--gold-glow);
}

.audio-btn.speaking {
  animation: audioPulse 0.8s infinite alternate;
}

@keyframes audioPulse {
  0% { transform: scale(1); box-shadow: 0 0 4px var(--gold-glow); }
  100% { transform: scale(1.15); box-shadow: 0 0 16px var(--gold-glow); }
}

/* Pronunciation Studio (Voice Practice with Mic) */
.pronounce-box {
  background: linear-gradient(135deg, rgba(6, 182, 212, 0.08) 0%, var(--bg-surface-elevated) 100%);
  border: 1px solid rgba(6, 182, 212, 0.25);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  margin-top: 1.25rem;
}

.pronounce-target {
  font-size: 1.25rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 0.5rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.pronounce-controls {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-top: 1rem;
  flex-wrap: wrap;
}

.mic-btn {
  padding: 0.6rem 1.25rem;
  border-radius: var(--radius-pill);
  background: linear-gradient(135deg, #ef4444 0%, #b91c1c 100%);
  color: white;
  border: none;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  cursor: pointer;
  transition: var(--transition-fast);
  box-shadow: 0 4px 12px rgba(239, 68, 68, 0.3);
}

.mic-btn:hover {
  filter: brightness(1.1);
  transform: translateY(-2px);
}

.mic-btn.listening {
  background: linear-gradient(135deg, #10b981 0%, #059669 100%);
  animation: micGlow 1.2s infinite alternate;
}

@keyframes micGlow {
  0% { box-shadow: 0 0 8px rgba(16, 185, 129, 0.4); }
  100% { box-shadow: 0 0 20px rgba(16, 185, 129, 0.8); }
}

.pronounce-result {
  margin-top: 1rem;
  padding: 0.85rem 1.15rem;
  border-radius: var(--radius-md);
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  font-size: 0.95rem;
  display: none;
}

/* Interactive Exercises */
.exercise-card {
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  margin-bottom: 1.5rem;
}

.exercise-question {
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 1rem;
}

.blank-input {
  background: var(--bg-surface);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  padding: 0.4rem 0.8rem;
  font-size: 1rem;
  font-weight: 600;
  color: var(--gold-400);
  min-width: 140px;
  outline: none;
  transition: var(--transition-fast);
  text-align: center;
}

.blank-input:focus {
  border-color: var(--gold-400);
  box-shadow: 0 0 8px var(--gold-glow);
}

.blank-input.correct {
  border-color: var(--emerald-500) !important;
  color: var(--emerald-500) !important;
  background: rgba(16, 185, 129, 0.1);
}

.blank-input.wrong {
  border-color: var(--crimson-500) !important;
  color: var(--crimson-500) !important;
  background: rgba(239, 68, 68, 0.1);
}

/* Multiple Choice Option Buttons */
.mc-options {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 0.75rem;
  margin-top: 0.85rem;
}

.mc-option-btn {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 0.85rem 1.15rem;
  text-align: left;
  cursor: pointer;
  transition: var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-weight: 500;
}

.mc-option-btn:hover {
  background: var(--bg-surface-hover);
  border-color: var(--border-strong);
}

.mc-option-btn.selected-correct {
  background: rgba(16, 185, 129, 0.15);
  border-color: var(--emerald-500);
  color: var(--emerald-500);
  font-weight: 700;
}

.mc-option-btn.selected-wrong {
  background: rgba(239, 68, 68, 0.15);
  border-color: var(--crimson-500);
  color: var(--crimson-500);
}

/* Feedback Box */
.feedback-box {
  margin-top: 1rem;
  padding: 0.85rem 1.25rem;
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  display: none;
}

.feedback-box.correct {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background: rgba(16, 185, 129, 0.15);
  border: 1px solid rgba(16, 185, 129, 0.4);
  color: #34d399;
}

.feedback-box.wrong {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background: rgba(239, 68, 68, 0.15);
  border: 1px solid rgba(239, 68, 68, 0.4);
  color: #f87171;
}

/* Word Bank / Sentence Reordering */
.word-bank {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin: 1rem 0;
  min-height: 48px;
  padding: 0.75rem;
  background: var(--bg-surface);
  border-radius: var(--radius-md);
  border: 1px dashed var(--border-strong);
}

.word-chip {
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 0.4rem 0.85rem;
  cursor: pointer;
  user-select: none;
  font-weight: 600;
  transition: var(--transition-fast);
}

.word-chip:hover {
  background: var(--gold-400);
  color: #0f172a;
}

.word-chip.used {
  opacity: 0.3;
  pointer-events: none;
}

/* Notes Pad */
.notes-textarea {
  width: 100%;
  min-height: 120px;
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1rem;
  color: var(--text-primary);
  font-size: 0.95rem;
  outline: none;
  resize: vertical;
  transition: var(--transition-fast);
}

.notes-textarea:focus {
  border-color: var(--gold-400);
  box-shadow: 0 0 8px var(--gold-glow);
}

/* AI Tutor Dialog Box */
.tutor-dialog-box {
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1.5rem;
}

.chat-history {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  max-height: 380px;
  overflow-y: auto;
  padding-right: 0.5rem;
  margin-bottom: 1.25rem;
}

.chat-bubble {
  padding: 0.9rem 1.25rem;
  border-radius: var(--radius-md);
  max-width: 85%;
  font-size: 0.95rem;
  line-height: 1.5;
  position: relative;
}

.chat-bubble.tutor {
  align-self: flex-start;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-bottom-left-radius: 4px;
}

.chat-bubble.user {
  align-self: flex-end;
  background: linear-gradient(135deg, #1e3a8a 0%, #1e40af 100%);
  color: #ffffff;
  border-bottom-right-radius: 4px;
}

.chat-input-bar {
  display: flex;
  gap: 0.75rem;
}

.chat-input-bar input {
  flex: 1;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 0.65rem 1rem;
  outline: none;
}

.chat-input-bar input:focus {
  border-color: var(--gold-400);
}


/* Action Button Group (Audio + Mic pair) */
.action-btn-group {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  flex-shrink: 0;
}

.mic-repeat-btn {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: rgba(239, 68, 68, 0.1);
  border: 1px solid rgba(239, 68, 68, 0.35);
  color: #f87171;
  font-size: 1rem;
  cursor: pointer;
  transition: var(--transition-fast);
  flex-shrink: 0;
}

.mic-repeat-btn:hover {
  background: #ef4444;
  color: #ffffff;
  border-color: #ef4444;
  transform: scale(1.1);
  box-shadow: 0 0 12px rgba(239, 68, 68, 0.45);
}

.mic-repeat-btn.listening {
  background: #dc2626 !important;
  color: #ffffff !important;
  border-color: #f87171 !important;
  animation: micActivePulse 0.9s infinite alternate;
}

@keyframes micActivePulse {
  0% { transform: scale(1); box-shadow: 0 0 6px rgba(239, 68, 68, 0.5); }
  100% { transform: scale(1.15); box-shadow: 0 0 18px rgba(239, 68, 68, 0.9); }
}

.row-voice-feedback {
  font-size: 0.8rem;
  margin-top: 0.35rem;
  line-height: 1.25;
  display: none;
}

.voice-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.18rem 0.6rem;
  border-radius: 9999px;
  font-size: 0.78rem;
  font-weight: 700;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--border-subtle);
}

.voice-badge.high {
  color: #34d399;
  background: rgba(16, 185, 129, 0.15);
  border-color: rgba(16, 185, 129, 0.35);
}

.voice-badge.med {
  color: #fbbf24;
  background: rgba(245, 158, 11, 0.15);
  border-color: rgba(245, 158, 11, 0.35);
}

.voice-badge.low {
  color: #f87171;
  background: rgba(239, 68, 68, 0.15);
  border-color: rgba(239, 68, 68, 0.35);
}


/* ==========================================================================
   PALESTRA DI SCRITTURA VOCABOLARIO: ARTICOLO, SOSTANTIVO & PLURALE
   ========================================================================== */
.vocab-write-box {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  margin-top: 1.25rem;
  margin-bottom: 2rem;
  box-shadow: var(--shadow-md);
}

.vocab-write-intro {
  margin-bottom: 1.5rem;
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.6;
}

.umlaut-bar {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
  padding: 0.75rem 1rem;
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  margin-bottom: 1.5rem;
}

.umlaut-label {
  font-size: 0.82rem;
  color: var(--text-muted);
  font-weight: 600;
  margin-right: 0.25rem;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.umlaut-btn {
  background: var(--bg-surface);
  color: var(--gold-400);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  padding: 0.25rem 0.65rem;
  font-size: 0.95rem;
  font-weight: 700;
  cursor: pointer;
  transition: var(--transition-fast);
  user-select: none;
}

.umlaut-btn:hover {
  background: var(--gold-500);
  color: #000;
  border-color: var(--gold-400);
  transform: translateY(-1px);
}

.vocab-write-list {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.vocab-write-item {
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  transition: var(--transition-normal);
}

.vocab-write-item:hover {
  border-color: var(--border-strong);
}

.vocab-write-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.vocab-write-prompt {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  flex-wrap: wrap;
}

.vocab-write-it {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
}

.vocab-write-rule-hint {
  font-size: 0.8rem;
  color: var(--text-muted);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-subtle);
  padding: 0.15rem 0.5rem;
  border-radius: 9999px;
}

.vocab-write-inputs {
  display: grid;
  grid-template-columns: minmax(180px, 1fr) 1.5fr 1.5fr;
  gap: 1rem;
  align-items: flex-end;
}

@media (max-width: 768px) {
  .vocab-write-inputs {
    grid-template-columns: 1fr;
    align-items: stretch;
  }
}

.write-field {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  justify-content: flex-end;
}

.write-field-label {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  min-height: 1.4rem;
  display: flex;
  align-items: flex-end;
  white-space: nowrap;
}

@media (max-width: 768px) {
  .write-field-label {
    white-space: normal;
    min-height: auto;
  }
}

.write-input {
  background: var(--bg-surface);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  padding: 0.55rem 0.8rem;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
  outline: none;
  transition: var(--transition-fast);
  width: 100%;
}

.write-input:focus {
  border-color: var(--gold-400);
  box-shadow: 0 0 8px var(--gold-glow);
}

.write-input.correct {
  border-color: var(--emerald-500) !important;
  color: var(--emerald-500) !important;
  background: rgba(16, 185, 129, 0.08) !important;
}

.write-input.wrong {
  border-color: var(--crimson-500) !important;
  color: var(--crimson-500) !important;
  background: rgba(239, 68, 68, 0.08) !important;
}

.vocab-write-feedback {
  margin-top: 0.85rem;
  font-size: 0.88rem;
  padding: 0.6rem 0.85rem;
  border-radius: var(--radius-sm);
  display: none;
  line-height: 1.45;
}

.vocab-write-feedback.visible {
  display: block;
}

.vocab-write-feedback.correct {
  background: rgba(16, 185, 129, 0.12);
  border: 1px solid rgba(16, 185, 129, 0.3);
  color: #34d399;
}

.vocab-write-feedback.wrong {
  background: rgba(239, 68, 68, 0.12);
  border: 1px solid rgba(239, 68, 68, 0.3);
  color: #fca5a5;
}

.vocab-write-feedback.warning {
  background: rgba(245, 158, 11, 0.12);
  border: 1px solid rgba(245, 158, 11, 0.3);
  color: #fbbf24;
}

.vocab-write-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 1.5rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--border-subtle);
}

.vocab-write-btn-group {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.vocab-score-display {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--gold-400);
}