/* trends.css — trends block: checkbox picker + tags + chart.
   Card chrome from shared .block-card in panels.css.
   Picker styles ported from legacy app-lab-charts.css:28-131. */

/* ===== Chart ===== */
.trends-chart-wrap {
  position: relative;
  height: 320px;
}
.trends-empty {
  text-align: center;
  padding: var(--space-8);
  color: var(--color-text-muted);
}

/* ===== Checkbox picker (in header) ===== */
.trend-picker {
  position: relative;
  min-width: 180px;
}
.trend-picker-btn {
  padding: 0.35rem 0.7rem;
  font-size: 0.8rem;
  border-radius: 6px;
  border: 1px solid var(--border-strong);
  background: var(--white);
  cursor: pointer;
  width: 100%;
  text-align: left;
  color: var(--text);
  font-family: inherit;
}
.trend-picker-btn:hover { border-color: var(--primary); }
.trend-picker-btn::after {
  content: '\25BC';
  float: right;
  font-size: 0.6rem;
  color: var(--text-light);
  margin-top: 0.2rem;
}
.trend-picker-dropdown {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: var(--white);
  border: 1px solid var(--gray-200, var(--border));
  border-radius: 8px;
  box-shadow: 0 4px 16px var(--shadow-lg);
  max-height: 220px;
  overflow-y: auto;
  z-index: 50;
  margin-top: 2px;
  padding: 0.3rem 0;
}
.trend-picker-dropdown.open { display: block; }
.trend-dd-option {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.4rem 0.8rem;
  font-size: 0.8rem;
  cursor: pointer;
  transition: background 0.1s;
}
.trend-dd-option:hover { background: var(--gray-50, var(--bg-subtle)); }
.trend-dd-option.checked { background: rgba(10, 110, 92, 0.05); font-weight: 600; }
.trend-dd-option input[type="checkbox"] {
  accent-color: var(--primary);
  margin: 0;
  cursor: pointer;
}
.trend-param-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}

/* ===== Tags (below header, inside body) ===== */
.trend-picker-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem;
  margin-bottom: 0.5rem;
}
.trend-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.15rem 0.45rem;
  font-size: 0.72rem;
  border-radius: 12px;
  border: 1px solid var(--tag-color, var(--border));
  background: color-mix(in srgb, var(--tag-color) 8%, transparent);
  color: var(--text);
}
.trend-tag button {
  background: none;
  border: none;
  cursor: pointer;
  font-size: 0.85rem;
  line-height: 1;
  color: var(--text-light);
  padding: 0 0.1rem;
}
.trend-tag button:hover { color: var(--error); }

/* ===== Grouped picker section headers (Step A 2026-05-13) ===== */
.trends-dd-section {
  padding: 0.5rem 0.75rem 0.25rem;
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-muted);
  background: var(--color-bg-raised);
  position: sticky;
  top: 0;
  z-index: 1;
}
.trends-dd-section:not(:first-child) {
  border-top: 1px solid var(--color-border);
  margin-top: 0.25rem;
}