/* فلش‌کارت */
.flashcards-page {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 500px;
}

.flashcard {
  width: 100%;
  max-width: 650px;
  height: 480px;
  cursor: pointer;
  perspective: 1500px;
  position: relative;
}

.flashcard .flashcard-front,
.flashcard .flashcard-back {
  position: absolute;
  width: 100%;
  height: 100%;
  backface-visibility: hidden;
  border-radius: 24px;
  padding: 35px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  box-shadow: var(--shadow);
  transition: transform 0.6s;
}

.flashcard .flashcard-front {
  background: linear-gradient(135deg, #667eea, #764ba2);
  color: white;
  transform: rotateY(0);
}

.flashcard .flashcard-back {
  background: white;
  color: var(--dark);
  transform: rotateY(180deg);
}

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

.flashcard.flipped .flashcard-back {
  transform: rotateY(0);
}

.flashcard .emoji {
  font-size: 70px;
  background: rgba(255, 255, 255, 0.2);
  width: 130px;
  height: 130px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
}

.flashcard h2 {
  font-size: 44px;
  margin: 15px 0;
}

/* دکمه‌های ریتینگ فلش‌کارت */
.rating-buttons {
  display: flex;
  gap: 15px;
  justify-content: center;
  margin-top: 30px;
  flex-wrap: wrap;
}

.rating-btn {
  padding: 12px 28px;
  border: none;
  border-radius: 50px;
  font-weight: 700;
  cursor: pointer;
  font-family: "Vazirmatn", sans-serif;
}

.rating-btn.again {
  background: var(--danger);
  color: white;
}
.rating-btn.hard {
  background: var(--warning);
  color: var(--dark);
}
.rating-btn.good {
  background: var(--success);
  color: var(--dark);
}
.rating-btn.easy {
  background: var(--primary);
  color: white;
}

/* پیشرفت */
.progress-bar {
  margin-top: 25px;
  text-align: center;
}

.progress-track {
  background: var(--light);
  height: 8px;
  border-radius: 10px;
  overflow: hidden;
}

.progress-fill {
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  height: 100%;
  width: 0%;
  transition: width 0.3s;
}

/* صفحه جزئیات درس */
.lesson-detail-page {
  background: white;
  border-radius: 24px;
  padding: 30px;
  box-shadow: var(--shadow);
}

.detail-header {
  display: flex;
  align-items: center;
  gap: 20px;
  margin-bottom: 25px;
  padding-bottom: 15px;
  border-bottom: 2px solid #eee;
}

.back-btn {
  background: var(--light);
  border: none;
  padding: 10px 20px;
  border-radius: 50px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: "Vazirmatn", sans-serif;
}

.back-btn:hover {
  background: var(--primary);
  color: white;
}

.detail-section {
  margin-bottom: 30px;
}

.detail-section h4 {
  color: var(--primary);
  margin-bottom: 15px;
  font-size: 18px;
}

.detail-text {
  background: var(--light);
  padding: 20px;
  border-radius: 16px;
  line-height: 1.9;
}

.vocab-list {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.vocab-item {
  background: var(--light);
  padding: 10px 18px;
  border-radius: 50px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.vocab-item strong {
  color: var(--primary);
}

.grammar-box {
  background: var(--light);
  padding: 20px;
  border-radius: 16px;
}

.exercise-item {
  background: white;
  padding: 20px;
  border-radius: 16px;
  margin-bottom: 15px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
  border: 1px solid rgba(0, 0, 0, 0.05);
}

.exercise-input {
  width: 70%;
  padding: 12px 16px;
  border: 2px solid #e0e0e0;
  border-radius: 50px;
  font-family: "Vazirmatn", sans-serif;
  margin-top: 10px;
}

.exercise-input:focus {
  outline: none;
  border-color: var(--primary);
}

.check-exercise {
  background: var(--primary);
  color: white;
  border: none;
  padding: 8px 20px;
  border-radius: 30px;
  cursor: pointer;
  margin-right: 10px;
  font-family: "Vazirmatn", sans-serif;
}

.feedback-correct {
  color: #27ae60;
  margin-right: 10px;
}

.feedback-wrong {
  color: var(--danger);
  margin-right: 10px;
}