/* 统计图表：Chart.js 画布（public/js/charts.js + /vendor/chart.umd.js）
   配色全部走 CSS 变量：主色 var(--accent)，未复习 var(--chart-pending)。 */

.chart-host { position: relative; width: 100%; min-width: 0; }
.chart-host canvas { display: block; }
.chart-donut-host { margin: 0 auto; }

/* 没有数据时用一句话代替空白画布 */
.chart-empty-note {
  display: flex; align-items: center; justify-content: center;
  min-height: 120px; padding: 18px;
  border: 1px dashed var(--divider); border-radius: var(--radius-sm);
  color: var(--text-mute); font-size: 12.5px; text-align: center;
}
.chart-fallback {
  display: flex; align-items: center; justify-content: center;
  min-height: 120px; padding: 18px;
  color: var(--text-mute); font-size: 12.5px; text-align: center;
}

.chart-legend { display: flex; flex-direction: column; gap: 7px; }
.chart-legend-row { display: flex; align-items: center; gap: 8px; font-size: 12.5px; }
.chart-legend-dot { width: 8px; height: 8px; border-radius: 3px; flex: none; }
.chart-legend-label { color: var(--text); }
.chart-legend-value {
  margin-left: auto;
  color: var(--text-mute);
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
  font-size: 11.5px;
}

.chart-inline-legend { display: flex; gap: 14px; align-items: center; font-size: 12px; color: var(--text-dim); }
.chart-inline-legend span { display: inline-flex; align-items: center; gap: 6px; }
.chart-swatch { width: 9px; height: 9px; border-radius: 3px; display: inline-block; }
.chart-swatch.accent { background: var(--accent); }
.chart-swatch.pending { background: var(--chart-pending); }

@media (prefers-reduced-motion: reduce) {
  .round-cell-bar > i { transition: none; }
}

/* ===== 复习报告（周报 / 月报） ===== */

.report-box { margin-top: 4px; }
.report-kpis {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(88px, 1fr));
  gap: 10px;
}
.report-kpi {
  display: flex; flex-direction: column; gap: 2px;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-elev);
}
.report-kpi b {
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
  font-size: 18px;
  color: var(--text-strong);
  line-height: 1.2;
}
.report-kpi span { font-size: 11.5px; color: var(--text-mute); }

.report-row {
  display: flex; align-items: center; gap: 8px;
  padding: 7px 9px;
  border-radius: var(--radius-sm);
  color: var(--text);
  text-decoration: none;
  font-size: 12.5px;
  transition: background 0.16s ease;
}
.report-row:hover { background: var(--bg-elev2); }
.report-row-title { flex: 1 1 auto; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

/* ===== 知识点聚类 ===== */
.cluster-list { display: flex; flex-direction: column; gap: 10px; }
/* 列表类区块的通用容器：以前是直接 slice(0, N)，多出来的看不到 */
.stats-list { display: flex; flex-direction: column; gap: 2px; }
/* 标签式的行（知识点、题目）横着排 */
.stats-list.chips { flex-direction: row; flex-wrap: wrap; gap: 6px; align-items: center; }
.stats-more {
  align-self: flex-start;
  margin-top: 6px;
  height: 26px;
  font-size: 11.5px;
}
.stats-list.chips .stats-more { margin-top: 0; }
.cluster-item {
  padding: 11px 13px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-elev);
}
.cluster-head { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; font-size: 13px; }
.cluster-head strong { color: var(--text-strong); }
.cluster-head .grow { flex: 1 1 auto; min-width: 0; }
.cluster-item .chip { cursor: pointer; }

/* ===== 周报/月报切换 ===== */

.seg {
  display: inline-flex;
  padding: 2px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-elev);
  gap: 2px;
}
.seg-btn {
  border: 0;
  background: transparent;
  color: var(--text-dim);
  font-size: 12px;
  padding: 4px 12px;
  border-radius: calc(var(--radius-sm) - 2px);
  cursor: pointer;
  transition: background 0.16s ease, color 0.16s ease;
}
.seg-btn:hover { color: var(--text); }
.seg-btn.active { background: var(--accent); color: #fff; }

@media (max-width: 820px) {
  .report-kpi b { font-size: 16px; }
  .cluster-item { padding: 10px 11px; }
}