.flashcards-toolbar {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
  flex-wrap: wrap;
}

.flashcards-pdf-select {
  width: auto;
  min-width: 220px;
  padding: 8px 12px;
}

.manual-card-form {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  margin-bottom: var(--space-md);
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.manual-form-input {
  padding: var(--space-sm);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  background: var(--bg-secondary);
  color: var(--text-primary);
  font-family: inherit;
}

.manual-form-actions {
  display: flex;
  justify-content: flex-end;
  gap: var(--space-sm);
}

.flashcards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: var(--space-md);
}

.flashcard-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  position: relative;
}

.flashcard-item-question {
  font-weight: 600;
  margin-bottom: var(--space-sm);
  padding-right: 30px;
}

.flashcard-item-answer {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.flashcard-favorite {
  position: absolute;
  top: 10px;
  right: 34px;
  background: transparent;
  border: none;
  cursor: pointer;
  font-size: 1rem;
}

.flashcard-favorite.favorited {
  filter: none;
}

.flashcard-delete {
  position: absolute;
  top: 10px;
  right: 8px;
  background: transparent;
  border: none;
  cursor: pointer;
  opacity: 0.5;
}

.flashcard-delete:hover {
  opacity: 1;
}

/* --- Study Mode --- */
.study-mode {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: var(--space-lg) 0;
}

.study-progress {
  color: var(--text-secondary);
  margin-bottom: var(--space-md);
}

.study-card {
  width: 100%;
  max-width: 500px;
  height: 260px;
  perspective: 1000px;
  cursor: pointer;
  position: relative;
  margin-bottom: var(--space-sm);
}

.study-card-face {
  position: absolute;
  inset: 0;
  backface-visibility: hidden;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--space-lg);
  font-size: 1.1rem;
  transition: transform 0.4s;
  box-shadow: var(--shadow);
}

.study-card-back {
  transform: rotateY(180deg);
  background: var(--accent);
  color: white;
}

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

.study-card.flipped .study-card-back {
  transform: rotateY(360deg);
}

.study-hint {
  color: var(--text-secondary);
  font-size: 0.85rem;
  margin-bottom: var(--space-md);
}

.study-controls {
  display: flex;
  gap: var(--space-sm);
  flex-wrap: wrap;
  justify-content: center;
}
.due-badge {
  background: var(--danger);
  color: white;
  font-size: 0.7rem;
  font-weight: 700;
  padding: 1px 7px;
  border-radius: 10px;
  margin-left: 4px;
}

.flashcard-due-label {
  font-size: 0.75rem;
  color: var(--accent);
  margin-top: 4px;
}

.rating-buttons {
  display: flex;
  gap: var(--space-xs);
  justify-content: center;
  margin-bottom: var(--space-md);
  flex-wrap: wrap;
}

.rating-btn {
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  border: none;
  cursor: pointer;
  font-size: 0.85rem;
  font-weight: 600;
  color: white;
}

.rating-again { background: #dc2626; }
.rating-hard { background: #ea580c; }
.rating-good { background: #16a34a; }
.rating-easy { background: #2563eb; }

.rating-btn:hover {
  opacity: 0.85;
}