/* ─── Analytics Filter Bar ─── */

.analytics-filters {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-5);
  background: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  margin-bottom: var(--space-5);
}

.analytics-filter-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.analytics-filter-label {
  font-size: var(--text-xs);
  font-weight: var(--weight-medium);
  color: var(--color-text-secondary);
}

.analytics-filter-group .form-input,
.analytics-filter-group .form-select {
  width: auto;
  min-width: 160px;
  height: 32px;
  font-size: var(--text-sm);
}

.analytics-filter-group input[type="date"] {
  width: 140px;
}

.analytics-presets {
  display: flex;
  gap: var(--space-1);
}

.analytics-preset-btn {
  padding: var(--space-1) var(--space-3);
  height: 32px;
  font-size: var(--text-xs);
  font-weight: var(--weight-medium);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-bg-surface);
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.analytics-preset-btn:hover {
  border-color: var(--color-border-heavy);
  color: var(--color-text-primary);
}

.analytics-preset-btn.active {
  background: var(--color-accent);
  color: var(--color-accent-text);
  border-color: var(--color-accent);
}

/* ─── KPI / Stat Cards ─── */

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: var(--space-5);
  margin-bottom: var(--space-6);
}

.stat-card {
  background: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-5) var(--space-6);
  transition: box-shadow var(--transition-base);
}

.stat-card:hover {
  box-shadow: var(--shadow-sm);
}

.stat-label {
  font-size: var(--text-xs);
  font-weight: var(--weight-medium);
  color: var(--color-text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-3);
}

.stat-value {
  font-size: var(--text-3xl);
  font-weight: var(--weight-semibold);
  letter-spacing: var(--tracking-tight);
  line-height: 1;
  color: var(--color-text-primary);
}

.stat-sub {
  font-size: var(--text-xs);
  color: var(--color-text-tertiary);
  margin-top: var(--space-2);
}

/* ─── Chart Containers ─── */

.charts-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-5);
  margin-bottom: var(--space-6);
}

.chart-card {
  background: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-6) var(--space-6) var(--space-4);
  min-height: 340px;
  transition: box-shadow var(--transition-base);
}

.chart-card:hover {
  box-shadow: var(--shadow-sm);
}

.chart-card-full {
  grid-column: 1 / -1;
}

.chart-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-3);
  padding-bottom: var(--space-3);
  border-bottom: 1px solid var(--color-border-light);
}

.chart-title {
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
  color: var(--color-text-primary);
  letter-spacing: var(--tracking-normal);
}

.chart-body {
  width: 100%;
  min-height: 280px;
}

/* ─── Chart Type Toggle ─── */

.chart-toggle {
  display: flex;
  gap: 1px;
  background: var(--color-bg-inset);
  border-radius: var(--radius-sm);
  padding: 2px;
}

.chart-toggle-btn {
  padding: 3px var(--space-3);
  font-size: var(--text-xs);
  font-weight: var(--weight-medium);
  border: none;
  border-radius: 4px;
  background: transparent;
  color: var(--color-text-tertiary);
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
  line-height: 1.6;
}

.chart-toggle-btn:hover {
  color: var(--color-text-secondary);
}

.chart-toggle-btn.active {
  background: var(--color-bg-surface);
  color: var(--color-text-primary);
  box-shadow: var(--shadow-xs);
}

/* ─── Selection Action Bar ─── */

.events-selection-bar {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  background: var(--color-accent);
  border-radius: var(--radius-lg);
  margin-bottom: var(--space-4);
  opacity: 0;
  height: 0;
  overflow: hidden;
  transition: all var(--transition-base);
}

.events-selection-bar.visible {
  opacity: 1;
  height: auto;
  padding: var(--space-3) var(--space-4);
}

.events-selection-bar .selection-count {
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: var(--color-accent-text);
}

.events-selection-bar .btn-danger {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
}

/* ─── Checkbox Column ─── */

.col-checkbox {
  width: 40px;
  text-align: center;
}

.event-checkbox {
  width: 16px;
  height: 16px;
  cursor: pointer;
  accent-color: var(--color-accent);
}

.table tr.row-selected {
  background: rgba(99, 102, 241, 0.06);
}

.table tr.row-selected:hover {
  background: rgba(99, 102, 241, 0.1);
}

/* ─── Events Table (Analytics) ─── */

.analytics-section {
  margin-top: var(--space-6);
}

.analytics-section-title {
  font-size: var(--text-md);
  font-weight: var(--weight-semibold);
  margin-bottom: var(--space-4);
}

.table .col-properties {
  max-width: 240px;
}

.properties-preview {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-secondary);
  max-width: 240px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  cursor: pointer;
  padding: 2px 6px;
  background: var(--color-bg-inset);
  border-radius: var(--radius-sm);
  display: inline-block;
}

.properties-preview:hover {
  color: var(--color-text-primary);
  background: var(--color-bg-surface-active);
}

.properties-expanded {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-secondary);
  background: var(--color-bg-inset);
  border-radius: var(--radius-md);
  padding: var(--space-3);
  max-width: 400px;
  white-space: pre-wrap;
  word-break: break-all;
}

/* ─── Dashboard Widget Grid ─── */

.dashboard-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(380px, 1fr));
  gap: var(--space-5);
  margin-bottom: var(--space-6);
}

.dashboard-widget {
  background: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-4) var(--space-5);
  transition: box-shadow var(--transition-base), opacity var(--transition-fast);
  cursor: default;
}

.dashboard-widget:hover {
  box-shadow: var(--shadow-sm);
}

.dashboard-widget.dragging {
  opacity: 0.4;
}

.widget-header {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-2);
}

.widget-drag-handle {
  cursor: grab;
  color: var(--color-text-tertiary);
  display: flex;
  align-items: center;
  flex-shrink: 0;
}

.widget-drag-handle:active {
  cursor: grabbing;
}

.widget-title {
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
  color: var(--color-text-primary);
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.widget-delete-btn {
  opacity: 0;
  transition: opacity var(--transition-fast);
  flex-shrink: 0;
}

.dashboard-widget:hover .widget-delete-btn {
  opacity: 1;
}

.widget-description {
  font-size: var(--text-xs);
  color: var(--color-text-tertiary);
  margin-bottom: var(--space-3);
  line-height: 1.5;
}

.widget-chart-body {
  width: 100%;
  min-height: 200px;
}

.widget-number {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 200px;
  gap: var(--space-2);
}

.widget-number-value {
  font-size: 3rem;
  font-weight: var(--weight-semibold);
  letter-spacing: var(--tracking-tight);
  line-height: 1;
  color: var(--color-text-primary);
}

.widget-number-label {
  font-size: var(--text-sm);
  color: var(--color-text-tertiary);
}

/* ─── Chat FAB + Overlay ─── */

.chat-fab {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 100;
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: var(--color-accent);
  color: var(--color-accent-text);
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 16px rgba(99, 102, 241, 0.35);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.chat-fab:hover {
  transform: scale(1.08);
  box-shadow: 0 6px 24px rgba(99, 102, 241, 0.45);
}

.chat-fab.hidden {
  display: none;
}

.chat-overlay {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 200;
  width: 440px;
  max-height: calc(100vh - 48px);
  display: flex;
  flex-direction: column;
}

.chat-overlay.hidden {
  display: none;
}

.chat-panel {
  background: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  display: flex;
  flex-direction: column;
  max-height: calc(100vh - 48px);
  box-shadow: 0 12px 48px rgba(0, 0, 0, 0.15), 0 4px 12px rgba(0, 0, 0, 0.08);
}

.chat-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--color-border-light);
  flex-shrink: 0;
}

.chat-header-title {
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
  color: var(--color-text-primary);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.chat-header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.chat-model-select {
  width: auto;
  min-width: 120px;
  height: 28px;
  font-size: var(--text-xs);
}

.chat-messages {
  flex: 1;
  min-height: 200px;
  max-height: 500px;
  overflow-y: auto;
  padding: var(--space-4);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.chat-empty-state {
  text-align: center;
  padding: var(--space-8) var(--space-4);
  color: var(--color-text-tertiary);
  font-size: var(--text-sm);
}

.chat-suggestions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  justify-content: center;
  margin-top: var(--space-4);
}

.chat-suggestion-btn {
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-xs);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-bg-surface);
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.chat-suggestion-btn:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.chat-message {
  max-width: 85%;
}

.chat-message-user {
  align-self: flex-end;
  background: var(--color-accent);
  color: var(--color-accent-text);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-lg) var(--radius-lg) var(--radius-sm) var(--radius-lg);
  font-size: var(--text-sm);
  line-height: 1.5;
}

.chat-message-assistant {
  align-self: flex-start;
  max-width: 100%;
}

.chat-loading {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--color-text-tertiary);
  font-size: var(--text-sm);
  padding: var(--space-3) 0;
}

.chat-message-error {
  background: rgba(239, 68, 68, 0.08);
  color: var(--color-danger);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-lg);
  font-size: var(--text-sm);
}

.chat-widget-card {
  background: var(--color-bg-page);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-4) var(--space-5);
}

.chat-widget-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-2);
}

.chat-widget-title {
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
  color: var(--color-text-primary);
}

.chat-widget-desc {
  font-size: var(--text-xs);
  color: var(--color-text-tertiary);
  margin-bottom: var(--space-3);
  line-height: 1.5;
}

.chat-widget-chart {
  width: 100%;
  min-height: 200px;
  margin-bottom: var(--space-3);
}

.chat-pin-btn {
  flex-shrink: 0;
}

.btn-xs {
  padding: var(--space-1) var(--space-2);
  font-size: var(--text-xs);
  height: 26px;
}

.chat-sql-details {
  border-top: 1px solid var(--color-border-light);
  padding-top: var(--space-3);
}

.chat-sql-details summary {
  font-size: var(--text-xs);
  color: var(--color-text-tertiary);
  cursor: pointer;
  user-select: none;
}

.chat-sql-details summary:hover {
  color: var(--color-text-secondary);
}

.chat-sql-code {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-secondary);
  background: var(--color-bg-inset);
  border-radius: var(--radius-md);
  padding: var(--space-3);
  margin-top: var(--space-2);
  white-space: pre-wrap;
  word-break: break-all;
  overflow-x: auto;
}

.chat-input-bar {
  display: flex;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-4);
  border-top: 1px solid var(--color-border-light);
  flex-shrink: 0;
}

.chat-input {
  flex: 1;
}

.spinner-sm {
  width: 16px;
  height: 16px;
  border-width: 2px;
}

/* ─── Responsive ─── */

@media (max-width: 900px) {
  .charts-grid {
    grid-template-columns: 1fr;
  }

  .dashboard-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .chat-overlay {
    width: calc(100vw - 32px);
    left: 16px;
    right: 16px;
    bottom: 16px;
  }
}

@media (max-width: 640px) {
  .analytics-filters {
    flex-direction: column;
    align-items: stretch;
  }

  .analytics-filter-group .form-input,
  .analytics-filter-group .form-select {
    width: 100%;
    min-width: unset;
  }

  .stats-grid {
    grid-template-columns: 1fr 1fr;
  }

  .analytics-presets {
    flex-wrap: wrap;
  }
}