/* ═══════════════════════════════════════════════════════════════
   Stats Page — Field Activity Dashboard
   4-quadrant viewport-filling layout
   ═══════════════════════════════════════════════════════════════ */

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
  margin: 0;
  overflow: hidden;
}

.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
}

/* ── Grid ── */
.stats-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-template-rows: 1fr 1fr;
  gap: 1px;
  margin-top: 44px;
  height: calc(100vh - 44px);
  background: var(--border-subtle, #f0f0f0);
}

.grid-panel {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  background: var(--bg);
}

/* ── Panel chrome — minimal, barely visible ── */
.panel-head {
  display: flex;
  align-items: center;
  height: 24px;
  padding: 0 22px;
  margin-top: 6px;
  flex-shrink: 0;
}

.panel-title {
  font-size: 10px;
  font-weight: 600;
  color: var(--text-3);
  text-transform: uppercase;
  letter-spacing: 0.6px;
}

.panel-head .toggle {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 0;
}

.toggle-btn {
  padding: 2px 8px;
  font-size: 10px;
  font-family: var(--font);
  font-weight: 600;
  color: var(--text-3);
  background: none;
  border: none;
  cursor: pointer;
  transition: color 0.12s;
  text-transform: uppercase;
  letter-spacing: 0.6px;
}

.toggle-btn.active { color: var(--accent); font-weight: 600; }
.toggle-btn:not(.active):hover { color: var(--text-2); }

.toggle-sep {
  width: 1px;
  height: 10px;
  background: var(--border-subtle, #f0f0f0);
}

/* ── Panel body ── */
.panel-body {
  flex: 1;
  overflow: hidden;
  position: relative;
  padding: 18px 22px 18px;
  box-sizing: border-box;
}

.panel-body svg {
  display: block;
}

/* ── Shared info line style (treemap hover, trend hover, breadth desc) ── */
/* These must be INSIDE .panel-body, right after the SVG */
.tm-info,
.trend-info,
.panel-desc {
  font-family: var(--font);
  font-size: 11px;
  color: var(--text-3);
  height: 14px;
  margin-top: 2px;
  pointer-events: none;
}

.tm-info-name { font-weight: 400; }
.tm-info-count { margin-left: 4px; font-weight: 400; }

/* ── Subfield filter (colored dots) ── */
.sf-filter {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 4px;
}

.sf-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  cursor: pointer;
  opacity: 0.4;
  transition: opacity 0.12s, transform 0.12s;
  border: none;
  padding: 0;
}

.sf-dot:hover { opacity: 0.7; }
.sf-dot.active { opacity: 1; transform: scale(1.3); }

/* ── Panel footer (toggles below chart) ── */
.panel-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 24px;
  padding: 0 22px;
  flex-shrink: 0;
}

/* ── Overlap panel: matrix left, detail right ── */
.overlap-row {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.overlap-row #overlapMatrix {
  flex-shrink: 0;
  overflow: visible;
}

.overlap-row #overlapMatrix svg {
  width: auto;
  height: auto;
  overflow: visible;
}

.overlap-detail {
  flex: 1;
  min-width: 130px;
  padding-top: 90px; /* align with matrix rows */
  overflow-y: auto;
  max-height: 100%;
  align-self: flex-start;
}

.overlap-detail-head {
  font-size: 9px;
  font-weight: 600;
  color: var(--text-3);
  text-transform: uppercase;
  letter-spacing: 0.4px;
  margin-bottom: 8px;
}

.overlap-detail-list {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

/* Cell-click detail below bridge list */
.overlap-cell-detail {
  margin-top: 10px;
  padding-top: 8px;
  border-top: 1px solid var(--border-subtle, #f0f0f0);
}

.overlap-cell-head {
  font-size: 9px;
  font-weight: 600;
  color: var(--text-3);
  text-transform: uppercase;
  letter-spacing: 0.4px;
  margin-bottom: 6px;
}

.overlap-cell-list {
  display: flex;
  flex-wrap: wrap;
  gap: 3px;
}

/* ── Tooltip ── */
.heatmap-tooltip {
  position: fixed;
  padding: 4px 8px;
  background: var(--text);
  color: var(--bg);
  font-size: 10px;
  font-family: var(--font);
  border-radius: 3px;
  pointer-events: none;
  z-index: 2000;
  white-space: nowrap;
  opacity: 0;
  transition: opacity 0.1s;
}

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

/* ── Responsive ── */
@media (max-width: 900px) {
  body { overflow: auto; }
  .stats-grid {
    grid-template-columns: 1fr;
    grid-template-rows: auto;
    height: auto;
  }
  .grid-panel {
    min-height: 300px;
    border-right: none;
  }
}