.heatmap-container {
  width: 100%;
  height: 600px;
  min-height: 400px;
  position: relative;
}
.heatmap-controls {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 12px;
  align-items: center;
}
.heatmap-btn {
  padding: 8px 16px;
  border: 1px solid var(--border-subtle, #e2e8f0);
  border-radius: 8px;
  background: var(--bg-card, #fff);
  color: var(--text-primary, #0f172a);
  font-family: 'Manrope', sans-serif;
  font-weight: 600;
  font-size: 0.9rem;
  cursor: pointer;
  transition: all 0.2s ease;
}
.heatmap-btn:hover {
  border-color: var(--color-primary, #0ea5e9);
  background: rgba(14, 165, 233, 0.06);
  transform: translateY(-1px);
}
.heatmap-btn.active {
  background: var(--color-primary, #0ea5e9);
  color: #fff;
  border-color: var(--color-primary, #0ea5e9);
  box-shadow: 0 2px 8px rgba(14, 165, 233, 0.3);
}
.heatmap-stats {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--border-subtle, #e2e8f0);
}
.heatmap-stat {
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.heatmap-stat-label {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-secondary, #64748b);
}
.heatmap-stat-value {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary, #0f172a);
}
.heatmap-stat-value.cold { color: #4575b4; }
.heatmap-stat-value.hot { color: #d73027; }
.heatmap-stat-value.neutral { color: var(--text-primary, #0f172a); }

.heatmap-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  background: var(--bg-card, rgba(255,255,255,0.9));
  z-index: 10;
  border-radius: 12px;
  transition: opacity 0.3s ease;
}
.heatmap-overlay.hidden {
  opacity: 0;
  pointer-events: none;
}
.heatmap-spinner {
  width: 36px;
  height: 36px;
  border: 3px solid var(--border-subtle, #e2e8f0);
  border-top-color: var(--color-primary, #0ea5e9);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
.heatmap-overlay-text {
  font-size: 0.9rem;
  color: var(--text-secondary, #64748b);
  font-weight: 500;
}
.heatmap-error-text {
  color: #d73027;
  font-weight: 600;
  font-size: 0.9rem;
}

@media (max-width: 768px) {
  .heatmap-container { height: 500px; }
  .heatmap-stats { gap: 12px; }
}
@media (max-width: 480px) {
  .heatmap-container { height: 420px; }
  .heatmap-btn { padding: 6px 12px; font-size: 0.82rem; }
  .heatmap-stats { gap: 8px; }
  .heatmap-stat-value { font-size: 0.95rem; }
}