/* Grammar Heat Map Styles (문법 이해도 히트맵) */

.grammar-heat-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  max-height: 13rem; /* 약 4행 기준 높이 */
  overflow-y: auto;
}

.grammar-heat-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem;
  background-color: var(--bg-tertiary);
  border-radius: 8px;
}

.grammar-heat-label {
  font-weight: 600;
  color: var(--text-primary);
  font-size: 0.9rem;
  flex: 1;
}

.grammar-heat-level {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.heat-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  display: inline-block;
}

/* 잘함 - 인디고 (원래 테마 색) */
.heat-dot.on {
  background-color: #6366f1;
  box-shadow: 0 0 8px rgba(99, 102, 241, 0.6);
}

/* 보통 - 노랑 */
.heat-dot.mid {
  background-color: #eab308;
  box-shadow: 0 0 8px rgba(234, 179, 8, 0.6);
}

/* 부족 - 빨강 */
.heat-dot.off {
  background-color: #ef4444;
  box-shadow: 0 0 8px rgba(239, 68, 68, 0.4);
}

.grammar-heat-text {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-left: 0.5rem;
  min-width: 40px;
}

.grammar-heat-legend {
  display: flex;
  gap: 1.5rem;
  justify-content: center;
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border-color);
  font-size: 0.85rem;
}

.grammar-heat-legend span {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--text-secondary);
}

/* Responsive - Grammar Heat */
@media (max-width: 640px) {
  .grammar-heat-legend {
    flex-direction: column;
    gap: 0.75rem;
  }
}