/* =========================================
   학습 통계 영역 스타일 (v1.18.9)
   모바일 최적화 및 통일감 있는 디자인
   ========================================= */

/* ===== 전체 래퍼 ===== */
.learning-stats-wrapper {
  margin: 12px 16px 16px 16px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
}

/* ===== 요약 영역 ===== */
.learning-stats-summary {
  padding: 14px 16px;
  background: var(--surface);
  border-bottom: 1px solid var(--border-light);
}

.learning-stats-row {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: 8px;
  margin-bottom: 8px;
  font-size: 13px;
  color: var(--text);
  line-height: 1.4;
}

.learning-stats-row:last-child {
  margin-bottom: 0;
}

.learning-stats-icon {
  font-size: 16px;
  line-height: 1;
  flex-shrink: 0;
}

.learning-stats-text {
  font-size: 13px;
  color: var(--text);
  font-weight: 500;
  line-height: 1.4;
  flex: 1;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 4px;
}

.learning-stats-text strong {
  font-weight: 700;
  color: var(--primary);
  font-size: 14px;
}

/* 구분선 */
.learning-stats-divider {
  width: 1px;
  height: 12px;
  background: var(--border-light);
  margin: 0 4px;
  flex-shrink: 0;
}

/* ===== 접기/펼치기 버튼 ===== */
.learning-stats-toggle {
  width: 100%;
  padding: 10px;
  background: transparent;
  color: var(--text-muted);
  border: none;
  border-top: 1px solid var(--border-light);
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
}

.learning-stats-toggle:hover {
  background: var(--bg-hover);
  color: var(--text);
}

.learning-stats-toggle:active {
  transform: scale(0.98);
}

#learning-stats-toggle-icon {
  font-size: 10px;
  transition: transform 0.3s ease;
}

/* ===== 카드 영역 (접기/펼치기) ===== */
.learning-stats-cards {
  max-height: 500px;
  overflow: hidden;
  transition: max-height 0.3s ease-in-out, padding 0.3s ease;
  padding: 16px;
  background: var(--bg);
}

.learning-stats-cards.collapsed {
  max-height: 0;
  padding: 0 16px;
}

/* ===== 카드 그리드 ===== */
.learning-stats-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

/* ===== 개별 카드 ===== */
.learning-stats-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px 10px;
  text-align: center;
  transition: all 0.2s ease;
}

.learning-stats-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
  border-color: var(--primary);
}

/* 카드별 아이콘 색상 (border 제거) */
.card-assignment .card-icon {
  color: #3B82F6;
}

.card-classroom .card-icon {
  color: #10B981;
}

.card-shorts .card-icon {
  color: #F59E0B;
}

.card-training .card-icon {
  color: #8B5CF6;
}

/* 카드 아이콘 */
.card-icon {
  font-size: 28px;
  margin-bottom: 6px;
  line-height: 1;
}

/* 카드 라벨 */
.card-label {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 6px;
  line-height: 1.3;
}

/* 카드 시간 */
.card-time {
  font-size: 15px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 2px;
  line-height: 1.2;
}

/* 카드 개수 */
.card-count {
  font-size: 11px;
  color: var(--text-muted);
  margin-bottom: 6px;
  line-height: 1.2;
}

/* 카드 상태 (완료 표시) */
.card-status {
  font-size: 12px;
  font-weight: 700;
  color: #10B981;
  min-height: 18px;
  line-height: 1.2;
}

/* ===== 데스크톱 (768px 이상) ===== */
@media (min-width: 768px) {
  .learning-stats-wrapper {
    margin: 16px 20px;
  }

  .learning-stats-summary {
    padding: 16px 20px;
  }

  .learning-stats-row {
    font-size: 14px;
    margin-bottom: 10px;
    gap: 10px;
  }

  .learning-stats-icon {
    font-size: 18px;
  }

  .learning-stats-text {
    font-size: 14px;
  }
  
  .learning-stats-text strong {
    font-size: 15px;
  }

  .learning-stats-toggle {
    padding: 12px;
    font-size: 13px;
  }

  .learning-stats-cards {
    padding: 20px;
  }

  .learning-stats-grid {
    grid-template-columns: repeat(4, 1fr);
    gap: 14px;
  }

  .learning-stats-card {
    padding: 16px 12px;
  }

  .card-icon {
    font-size: 36px;
    margin-bottom: 8px;
  }

  .card-label {
    font-size: 13px;
    margin-bottom: 8px;
  }

  .card-time {
    font-size: 17px;
    margin-bottom: 3px;
  }

  .card-count {
    font-size: 12px;
    margin-bottom: 8px;
  }

  .card-status {
    font-size: 13px;
    min-height: 20px;
  }
}

/* ===== 대형 데스크톱 (1024px 이상) ===== */
@media (min-width: 1024px) {
  .learning-stats-wrapper {
    margin: 20px auto;
    max-width: 1000px;
  }
}