.stat-tool-root {
  --tool-bg: transparent;
  --tool-card: #ffffff;
  --tool-panel: #ffffff;
  --tool-text: #303133;
  --tool-subtext: #606266;
  --tool-border: #dcdfe6;
  --tool-panel-border: #ebeef5;
  --tool-input-bg: #ffffff;
  --tool-muted: #909399;
  --tool-table-head: #f9fafc;
  --tool-shadow: 0 3px 12px rgba(0, 0, 0, 0.05);
  --tool-primary: #409eff;
  --tool-danger: #d03050;
}

html[data-theme='dark'] .stat-tool-root {
  --tool-card: #1f2329;
  --tool-panel: #232a33;
  --tool-text: #e5e7eb;
  --tool-subtext: #a7b0be;
  --tool-border: #3a4452;
  --tool-panel-border: #3a4452;
  --tool-input-bg: #1a1f27;
  --tool-muted: #93a0b3;
  --tool-table-head: #2b3442;
  --tool-shadow: 0 4px 14px rgba(0, 0, 0, 0.35);
}

.stat-tool-root * {
  box-sizing: border-box;
}

.stat-tool-root .tool-shell {
  width: 100%;
  margin: 0;
  color: var(--tool-text);
}

.stat-tool-root .tool-header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 12px;
}

.stat-tool-root .tool-title {
  margin: 0;
  font-size: 24px;
  font-weight: 700;
}

.stat-tool-root .tool-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.stat-tool-root .tool-links a {
  text-decoration: none;
  color: var(--tool-primary);
  font-size: 14px;
}

.stat-tool-root .tool-card {
  background: var(--tool-card);
  border: 1px solid var(--tool-border);
  border-radius: 10px;
  box-shadow: var(--tool-shadow);
  padding: 14px;
}

.stat-tool-root .tool-panel {
  border: 1px solid var(--tool-panel-border);
  background: var(--tool-panel);
  border-radius: 8px;
  padding: 12px;
  margin-top: 12px;
}

.stat-tool-root .tool-panel:first-child {
  margin-top: 0;
}

.stat-tool-root .tool-panel-title {
  margin: 0 0 10px;
  font-size: 16px;
  font-weight: 600;
}

.stat-tool-root .tool-error {
  margin-top: 6px;
  color: var(--tool-danger);
  font-size: 12px;
}

.stat-tool-root .tool-hint {
  margin-top: 6px;
  color: var(--tool-muted);
  font-size: 12px;
}

.stat-tool-root .tool-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

.stat-tool-root .tool-grid {
  display: grid;
  gap: 12px;
}

.stat-tool-root .tool-grid.cols-2 {
  grid-template-columns: repeat(2, minmax(260px, 1fr));
}

.stat-tool-root .tool-field {
  display: grid;
  grid-template-columns: 170px 1fr;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
}

.stat-tool-root .tool-field:last-child {
  margin-bottom: 0;
}

.stat-tool-root .tool-field label {
  color: var(--tool-subtext);
  font-size: 14px;
}

.stat-tool-root .tool-field input,
.stat-tool-root .tool-input,
.stat-tool-root .tool-number {
  width: 100%;
  border: 1px solid var(--tool-border);
  border-radius: 6px;
  padding: 8px 10px;
  font-size: 14px;
  outline: none;
  background: var(--tool-input-bg);
  color: var(--tool-text);
}

.stat-tool-root .tool-field input:focus,
.stat-tool-root .tool-input:focus,
.stat-tool-root .tool-number:focus {
  border-color: var(--tool-primary);
}

.stat-tool-root .tool-btn {
  border: 1px solid var(--tool-primary);
  background: var(--tool-primary);
  color: #fff;
  border-radius: 6px;
  padding: 8px 14px;
  font-size: 14px;
  cursor: pointer;
}

.stat-tool-root .tool-btn:disabled {
  background: #a0cfff;
  border-color: #a0cfff;
  cursor: not-allowed;
}

.stat-tool-root .tool-table-wrap {
  overflow: auto;
}

.stat-tool-root .tool-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
  color: var(--tool-text);
}

.stat-tool-root .tool-table th,
.stat-tool-root .tool-table td {
  border: 1px solid var(--tool-panel-border);
  padding: 6px 8px;
  text-align: right;
}

.stat-tool-root .tool-table th:first-child,
.stat-tool-root .tool-table td:first-child {
  text-align: center;
}

.stat-tool-root .tool-table thead th {
  background: var(--tool-table-head);
  color: var(--tool-subtext);
}

.stat-tool-root .tool-chart-canvas {
  width: 100%;
  display: block;
  max-width: 100%;
}

.stat-tool-root .tool-axis-labels {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 6px;
  color: var(--tool-subtext);
  font-size: 12px;
}

.stat-tool-root .tool-hist {
  display: grid;
  grid-auto-flow: column;
  align-items: end;
  gap: 6px;
  min-height: 140px;
  margin-top: 10px;
  overflow-x: auto;
  padding-bottom: 4px;
}

.stat-tool-root .tool-hist-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-end;
}

.stat-tool-root .tool-hist-bar {
  width: 18px;
  background: var(--tool-primary);
  border-radius: 3px 3px 0 0;
}

.stat-tool-root .tool-hist-label {
  margin-top: 4px;
  font-size: 10px;
  color: var(--tool-subtext);
  white-space: nowrap;
}

.stat-tool-root .tool-progress {
  width: min(100%, 560px);
  height: 14px;
}

.stat-tool-root .tool-boxplot {
  width: 100%;
  height: 80px;
}

.stat-tool-root .tool-kv {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 8px;
  margin-bottom: 6px;
}

.stat-tool-root .tool-kv .k {
  color: var(--tool-subtext);
}

.stat-tool-root .tool-kv .v {
  font-weight: 500;
}

.stat-tool-root .tool-inline {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.stat-tool-root .tool-percent-range {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}

.stat-tool-root .tool-note {
  margin-top: 8px;
  color: var(--tool-muted);
  font-size: 12px;
}

@media (max-width: 900px) {
  .stat-tool-root .tool-grid.cols-2 {
    grid-template-columns: 1fr;
  }

  .stat-tool-root .tool-field {
    grid-template-columns: 1fr;
    gap: 6px;
  }

  .stat-tool-root .tool-kv {
    grid-template-columns: 1fr;
  }

  .stat-tool-root .tool-title {
    font-size: 20px;
  }
}