/**
 * Chart.js 數據可視化樣式
 * Phase 5.3
 */

/* ============================================
   圖表展示區容器
   ============================================ */
.charts-showcase {
  padding: var(--spacing-6);
}

.charts-showcase .showcase-header {
  text-align: center;
  margin-bottom: var(--spacing-8);
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
  padding: var(--spacing-6);
  background: var(--color-bg-tertiary);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-lg);
}

.charts-showcase .showcase-header h2 {
  font-size: var(--font-size-2xl);
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-2);
}

.charts-showcase .showcase-header p {
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-4);
}

.chart-controls {
  display: flex;
  gap: var(--spacing-3);
  flex-wrap: wrap;
}

/* ============================================
   圖表網格布局
   ============================================ */
.charts-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-6);
  margin-bottom: var(--spacing-8);
}

/* 大型圖表卡片（跨兩列） */
.chart-card-large {
  grid-column: span 2;
}

/* ============================================
   圖表卡片樣式
   ============================================ */
.chart-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-lg);
  padding: var(--spacing-5);
  position: relative;
  overflow: hidden;
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.chart-card:hover {
  border-color: var(--color-cyan);
  box-shadow: 0 0 20px rgba(0, 217, 255, 0.1);
}

.chart-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--color-cyan), transparent);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.chart-card:hover::before {
  opacity: 1;
}

/* ============================================
   圖表卡片標題
   ============================================ */
.chart-card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-4);
}

.chart-card-header h3 {
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-primary);
  margin: 0;
}

.chart-badge {
  font-size: var(--font-size-xs);
  padding: var(--spacing-1) var(--spacing-2);
  background: rgba(0, 217, 255, 0.1);
  color: var(--color-cyan);
  border-radius: var(--radius-sm);
  font-weight: var(--font-weight-medium);
}

/* ============================================
   圖表容器
   ============================================ */
.chart-wrapper {
  position: relative;
  height: 280px;
  width: 100%;
}

.chart-card-large .chart-wrapper {
  height: 320px;
}

/* Canvas 自適應 */
.chart-wrapper canvas {
  max-width: 100%;
  max-height: 100%;
}

/* ============================================
   功能說明區
   ============================================ */
.chart-features {
  background: var(--color-bg-tertiary);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-lg);
  padding: var(--spacing-6);
}

.chart-features h3 {
  font-size: var(--font-size-lg);
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-4);
}

.chart-features ul {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-3);
  list-style: none;
  padding: 0;
  margin: 0;
}

.chart-features li {
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
  padding: var(--spacing-2);
  background: var(--color-bg-card);
  border-radius: var(--radius-md);
  text-align: center;
}

/* ============================================
   響應式設計
   ============================================ */
@media (max-width: 1279px) {
  .charts-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .chart-card-large {
    grid-column: span 2;
  }

  .chart-features ul {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .charts-grid {
    grid-template-columns: 1fr;
  }

  .chart-card-large {
    grid-column: span 1;
  }

  .chart-wrapper {
    height: 240px;
  }

  .chart-card-large .chart-wrapper {
    height: 280px;
  }

  .chart-features ul {
    grid-template-columns: 1fr;
  }

  .chart-controls {
    flex-direction: column;
  }

  .chart-controls button {
    width: 100%;
  }
}

/* ============================================
   動畫效果
   ============================================ */
@keyframes chartFadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.chart-card {
  animation: chartFadeIn 0.5s ease forwards;
}

.chart-card:nth-child(1) { animation-delay: 0s; }
.chart-card:nth-child(2) { animation-delay: 0.1s; }
.chart-card:nth-child(3) { animation-delay: 0.15s; }
.chart-card:nth-child(4) { animation-delay: 0.2s; }
.chart-card:nth-child(5) { animation-delay: 0.25s; }
.chart-card:nth-child(6) { animation-delay: 0.3s; }
.chart-card:nth-child(7) { animation-delay: 0.35s; }
.chart-card:nth-child(8) { animation-delay: 0.4s; }

/* ============================================
   Tooltip 自訂樣式（覆蓋 Chart.js 預設）
   ============================================ */
.chartjs-tooltip {
  background: rgba(15, 23, 42, 0.95) !important;
  border: 1px solid var(--color-cyan) !important;
  border-radius: var(--radius-md) !important;
  padding: var(--spacing-3) !important;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3) !important;
}

/* ============================================
   圖表載入狀態
   ============================================ */
.chart-loading {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 280px;
  color: var(--color-text-tertiary);
}

.chart-loading::after {
  content: '載入中...';
  animation: pulse 1.5s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 0.5; }
  50% { opacity: 1; }
}

/* ============================================
   實時更新指示器
   ============================================ */
.realtime-indicator {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-2);
  font-size: var(--font-size-xs);
  color: var(--color-green);
}

.realtime-indicator::before {
  content: '';
  width: 8px;
  height: 8px;
  background: var(--color-green);
  border-radius: 50%;
  animation: blink 1s ease-in-out infinite;
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}