/* public/css/pages/stats.css — 數據統計頁面 */
/* .monitor-grid / .stat-card* 共用 KPI 小卡樣式在 dashboard.css（monitor.html 也引用） */

/* === 篩選列 === */
.stats-filter-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  gap: 16px;
  padding: 16px 20px;
  margin-bottom: 24px;
  background: var(--bg-base);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}

.stats-filter-field {
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 160px;
}

.stats-filter-field label {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.stats-filter-actions {
  display: flex;
  gap: 12px;
  margin-left: auto;
}

@media (max-width: 640px) {
  .stats-filter-bar {
    flex-direction: column;
    align-items: stretch;
  }
  .stats-filter-actions {
    margin-left: 0;
  }
}

/* === 圖表區 === */
.stats-chart-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(360px, 1fr));
  gap: 16px;
}

.stats-chart-card {
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.stats-chart-title {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.stats-chart-canvas-wrap {
  position: relative;
  height: 320px;
}

.stats-chart-overlay {
  display: none;
  position: absolute;
  inset: 0;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  color: var(--text-muted);
  font-size: 0.85rem;
  background: var(--bg-base);
}

.stats-chart-canvas-wrap.is-loading .stats-chart-overlay,
.stats-chart-canvas-wrap.is-empty .stats-chart-overlay {
  display: flex;
}

.stats-chart-canvas-wrap.is-loading canvas,
.stats-chart-canvas-wrap.is-empty canvas {
  visibility: hidden;
}

.stats-chart-overlay .icon {
  width: 32px;
  height: 32px;
  opacity: 0.6;
}