/* ============================================
   数据图表样式
   ============================================ */

/* 时间范围选择器 */
.chart-range-selector {
  display: flex;
  justify-content: center;
  gap: 6px;
  margin-top: 24px;
  flex-wrap: wrap;
}

.chart-range-btn {
  padding: 5px 14px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-pill);
  background: var(--bg-card);
  color: var(--text-secondary);
  font-size: 12px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s ease;
  font-family: inherit;
}

.chart-range-btn:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.chart-range-btn.active {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}

/* 图表区域 */
.chart-section {
  margin-top: 32px;
  margin-bottom: 28px;
}

.chart-section-title {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 14px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

/* 空状态 */
.chart-empty {
  text-align: center;
  padding: 24px 0;
  color: var(--text-muted);
  font-size: 13px;
}

/* ============================================
   SVG 曲线图
   ============================================ */
.line-chart-wrap {
  position: relative;
  width: 100%;
  user-select: none;
}

.line-chart-svg {
  width: 100%;
  height: 130px;
  overflow: visible;
  display: block;
}

/* 网格线 */
.chart-grid-line {
  stroke: var(--border-color);
  stroke-width: 1;
  stroke-dasharray: 3 3;
}

/* Y 轴标签 */
.chart-y-label {
  font-size: 9px;
  fill: var(--text-muted);
  text-anchor: end;
}

/* X 轴标签 */
.chart-x-labels {
  display: flex;
  justify-content: space-between;
  padding: 4px 0 0 24px;
  margin-top: 2px;
}

.chart-x-label {
  font-size: 9px;
  color: var(--text-muted);
  line-height: 1;
  text-align: center;
  flex: 1;
}

/* 曲线路径 */
.chart-area-path {
  fill: var(--primary-alpha);
  transition: d 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.chart-line-path {
  fill: none;
  stroke: var(--primary);
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
  transition: d 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

/* 数据点 */
.chart-dot {
  fill: var(--primary);
  stroke: var(--bg-card);
  stroke-width: 2;
  cursor: pointer;
  transition: r 0.15s, opacity 0.15s;
  opacity: 0;
}

.chart-dot.active,
.chart-dot:hover {
  opacity: 1;
  r: 4;
}

/* 悬停竖线 */
.chart-hover-line {
  stroke: var(--border-hover);
  stroke-width: 1;
  stroke-dasharray: 3 3;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.1s;
}

.chart-hover-line.visible {
  opacity: 1;
}

/* 图表 Tooltip */
.chart-tooltip {
  position: absolute;
  background: var(--bg-elevated, #fff);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 6px 10px;
  font-size: 12px;
  color: var(--text-primary);
  pointer-events: none;
  white-space: nowrap;
  box-shadow: var(--shadow);
  opacity: 0;
  transition: opacity 0.15s;
  z-index: 10;
  transform: translateX(-50%);
}

.chart-tooltip.visible {
  opacity: 1;
}

.chart-tooltip-hour {
  color: var(--text-muted);
  font-size: 11px;
  margin-bottom: 2px;
}

.chart-tooltip-count {
  font-weight: 600;
  color: var(--primary);
}

/* ============================================
   水平条形图（分类分布）
   ============================================ */
.category-chart {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.category-bar-row {
  display: flex;
  align-items: center;
  gap: 10px;
}

.category-bar-label {
  width: 48px;
  font-size: 11px;
  color: var(--text-secondary);
  text-align: right;
  flex-shrink: 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.category-bar-track {
  flex: 1;
  height: 8px;
  background: var(--bg-hover);
  border-radius: var(--radius-pill);
  overflow: hidden;
}

.category-bar-fill {
  height: 100%;
  border-radius: var(--radius-pill);
  background: linear-gradient(90deg, var(--primary), var(--primary-light, #419cff));
  transition: width 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.category-bar-count {
  width: 32px;
  font-size: 11px;
  font-weight: 600;
  color: var(--text-primary);
  flex-shrink: 0;
}

/* 深色主题微调 */
[data-theme="dark"] .category-bar-fill {
  background: linear-gradient(90deg, var(--primary), #60aeff);
}