/* ============================================================
   ENHANCEMENTS.CSS – Dark mode, filters, search, shortcuts,
   skeleton loading, responsive, alerts, comparison, animations
   ============================================================ */

/* === CSS VARIABLES === */
:root {
  --bg-primary: #f1f5f9;
  --bg-card: #ffffff;
  --bg-card-hover: #f8fafc;
  --bg-input: #ffffff;
  --bg-header: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
  --bg-bar: #ffffff;
  --bg-toggle: #f1f5f9;
  --bg-chart: #f8fafc;
  --border-primary: #e2e8f0;
  --border-light: #f1f5f9;
  --text-primary: #0f172a;
  --text-secondary: #334155;
  --text-muted: #64748b;
  --text-faint: #94a3b8;
  --shadow-card: 0 4px 12px -2px rgba(15, 23, 42, .04);
  --shadow-hover: 0 8px 20px -4px rgba(15, 23, 42, .1);
  --accent: #3b82f6;
  --accent-bg: rgba(59, 130, 246, .1);
  --scrollbar-thumb: #e2e8f0;
}

/* === DARK MODE === */
[data-theme="dark"] {
  --bg-primary: #0f172a;
  --bg-card: #1e293b;
  --bg-card-hover: #334155;
  --bg-input: #1e293b;
  --bg-header: linear-gradient(135deg, #020617 0%, #0f172a 100%);
  --bg-bar: #1e293b;
  --bg-toggle: #334155;
  --bg-chart: #0f172a;
  --border-primary: #334155;
  --border-light: #1e293b;
  --text-primary: #f1f5f9;
  --text-secondary: #cbd5e1;
  --text-muted: #94a3b8;
  --text-faint: #64748b;
  --shadow-card: 0 4px 12px -2px rgba(0, 0, 0, .3);
  --shadow-hover: 0 8px 20px -4px rgba(0, 0, 0, .4);
  --scrollbar-thumb: #475569;
}

[data-theme="dark"] html,
[data-theme="dark"] body,
html[data-theme="dark"],
body[data-theme="dark"],
[data-theme="dark"] {
  background: var(--bg-primary);
  color: var(--text-secondary);
}

[data-theme="dark"] .page-header {
  background: var(--bg-header);
}

[data-theme="dark"] .client-selector-bar {
  background: var(--bg-bar);
  border-color: var(--border-primary);
}

[data-theme="dark"] .view-toggle {
  background: var(--bg-toggle);
}

[data-theme="dark"] .view-toggle button {
  color: var(--text-muted);
}

[data-theme="dark"] .view-toggle button.active {
  background: var(--bg-card);
  color: var(--text-primary);
}

[data-theme="dark"] #client-select,
[data-theme="dark"] .filter-select {
  background: var(--bg-input);
  color: var(--text-primary);
  border-color: var(--border-primary);
}

[data-theme="dark"] .card,
[data-theme="dark"] .metrics-section,
[data-theme="dark"] .csv-dataset,
[data-theme="dark"] .kpi-card {
  background: var(--bg-card);
  border-color: var(--border-primary);
  box-shadow: var(--shadow-card);
}

[data-theme="dark"] .card-title,
[data-theme="dark"] .kpi-value,
[data-theme="dark"] .metrics-section-title,
[data-theme="dark"] .pmt-number,
[data-theme="dark"] .csv-dataset-name,
[data-theme="dark"] .stat-block-value {
  color: var(--text-primary);
}

[data-theme="dark"] .card-subtitle,
[data-theme="dark"] .kpi-label,
[data-theme="dark"] .section-title,
[data-theme="dark"] .chart-box-title,
[data-theme="dark"] .stat-block-label {
  color: var(--text-muted);
}

[data-theme="dark"] .kpi-sub {
  color: var(--text-faint);
}

[data-theme="dark"] .card-section {
  border-color: var(--border-light);
}

[data-theme="dark"] .chart-box,
[data-theme="dark"] .stat-block {
  background: var(--bg-chart);
  border-color: var(--border-primary);
}

[data-theme="dark"] .scroll-list {
  background: var(--bg-chart);
}

[data-theme="dark"] .inv-section,
[data-theme="dark"] .pmt-section {
  background: var(--bg-card);
  border-color: var(--border-primary);
}

[data-theme="dark"] .inv-header,
[data-theme="dark"] .pmt-header {
  color: var(--text-primary);
}

[data-theme="dark"] .header-left h2 {
  color: var(--text-primary);
}

[data-theme="dark"] .inv-dates,
[data-theme="dark"] .pmt-recv-date {
  color: var(--text-muted);
}

[data-theme="dark"] .inv-dates strong,
[data-theme="dark"] .pmt-recv-date strong {
  color: var(--text-secondary);
}

[data-theme="dark"] .data-table th {
  background: var(--bg-card-hover);
  color: var(--text-muted);
  border-color: var(--border-primary);
}

[data-theme="dark"] .data-table td {
  color: var(--text-secondary);
  border-color: var(--border-light);
}

[data-theme="dark"] .email-row {
  background: var(--bg-card);
}

[data-theme="dark"] .cc-row {
  background: var(--bg-chart);
}

[data-theme="dark"] .email-group,
[data-theme="dark"] .scd-grid {
  border-color: var(--border-primary);
}

[data-theme="dark"] .scd-item-value,
[data-theme="dark"] .sku-code {
  color: var(--text-primary);
}

[data-theme="dark"] .sku-block,
[data-theme="dark"] .info-pill {
  background: var(--bg-chart);
  border-color: var(--border-primary);
}

[data-theme="dark"] .icon-button {
  background: var(--bg-card);
  border-color: var(--border-primary);
  color: var(--text-muted);
}

[data-theme="dark"] .acc-icon-wrap {
  background: var(--bg-chart);
  border-color: var(--border-primary);
}

[data-theme="dark"] .nav-button {
  background: var(--bg-toggle);
  border-color: var(--border-primary);
  color: var(--text-muted);
}

[data-theme="dark"] .month-chip {
  background: var(--bg-card);
  border-color: var(--border-primary);
  color: var(--text-muted);
}

[data-theme="dark"] .scroll-arrow {
  background: var(--bg-card);
  border-color: var(--border-primary);
  color: var(--text-muted);
}

[data-theme="dark"] .usage-collapsible,
[data-theme="dark"] .entities-section {
  border-color: var(--border-primary);
}

[data-theme="dark"] .usage-icon-btn {
  background: var(--bg-card);
  border-color: var(--border-primary);
  color: var(--text-muted);
}

[data-theme="dark"] .collapsed-summary {
  background: var(--bg-chart);
  border-color: var(--border-light);
}

[data-theme="dark"] .inv-summary,
[data-theme="dark"] .pmt-summary {
  border-color: var(--border-primary);
}

[data-theme="dark"] .pmt-summary {
  background: var(--bg-chart);
}

[data-theme="dark"] .summary-row span:first-child {
  color: var(--text-muted);
}

[data-theme="dark"] .summary-row span:last-child {
  color: var(--text-primary);
}

[data-theme="dark"] .pmt-amount {
  color: var(--text-primary);
}

[data-theme="dark"] .apps-container {
  border-color: var(--border-primary);
}

[data-theme="dark"] .app-section h4 {
  color: var(--text-primary);
}

[data-theme="dark"] .li-toggle {
  background: var(--bg-chart);
  border-color: var(--border-primary);
}

[data-theme="dark"] .li-toggle h4 {
  color: var(--text-secondary);
}

[data-theme="dark"] .chart-modal-content {
  background: var(--bg-card);
}

[data-theme="dark"] .chart-modal-header {
  border-color: var(--border-light);
}

[data-theme="dark"] #chart-modal-title {
  color: var(--text-primary);
}

[data-theme="dark"] .legend-row {
  color: var(--text-secondary);
  border-color: var(--border-light);
}

[data-theme="dark"] .dl-btn {
  background: var(--bg-chart);
  border-color: var(--border-primary);
  color: var(--text-secondary);
}

[data-theme="dark"] .email-label {
  color: var(--text-primary);
}

[data-theme="dark"] .email-label::after {
  color: var(--border-primary);
}

[data-theme="dark"] .email-address {
  color: var(--text-secondary);
}

[data-theme="dark"] .email-row+.email-row {
  border-color: var(--border-light);
}

[data-theme="dark"] .inv-body,
[data-theme="dark"] .pmt-body {
  border-color: var(--border-light) !important;
}

[data-theme="dark"] .action-btn {
  background: var(--bg-chart);
  border-color: var(--border-primary);
}

[data-theme="dark"] .csv-dataset-header:hover {
  background: var(--bg-card-hover);
}

[data-theme="dark"] .csv-dataset-body {
  border-color: var(--border-primary) !important;
}

[data-theme="dark"] .scrollbar-thumb {
  background: var(--scrollbar-thumb);
}

[data-theme="dark"] .info-pill-label {
  color: var(--text-secondary);
}

[data-theme="dark"] .info-pill-sep {
  color: var(--border-primary);
}

/* === DARK MODE TOGGLE BUTTON === */
.dark-toggle {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  border: 1px solid #e2e8f0;
  background: white;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  transition: all .2s ease;
  flex-shrink: 0;
}

.dark-toggle:hover {
  transform: scale(1.08);
  border-color: #3b82f6;
}

[data-theme="dark"] .dark-toggle {
  background: var(--bg-card);
  border-color: var(--border-primary);
}

/* === FILTER BAR === */
.filter-bar {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.filter-select {
  padding: 7px 30px 7px 12px;
  border-radius: 10px;
  border: 1px solid #e2e8f0;
  font-size: 12px;
  font-weight: 500;
  color: #1e293b;
  background: white;
  cursor: pointer;
  appearance: none;
  font-family: 'Inter', sans-serif;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 24 24' fill='none' stroke='%2364748b' stroke-width='2.5'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 8px center;
}

.filter-select:focus {
  outline: none;
  border-color: #3b82f6;
  box-shadow: 0 0 0 3px rgba(59, 130, 246, .15);
}

.filter-sep {
  width: 1px;
  height: 24px;
  background: #e2e8f0;
  flex-shrink: 0;
}

[data-theme="dark"] .filter-sep {
  background: var(--border-primary);
}

/* === GLOBAL SEARCH === */
.search-wrap {
  position: relative;
  display: flex;
  align-items: center;
}

.search-input {
  width: 200px;
  padding: 7px 12px 7px 32px;
  border-radius: 10px;
  border: 1px solid #e2e8f0;
  font-size: 12px;
  font-family: 'Inter', sans-serif;
  color: #1e293b;
  background: white;
  transition: all .2s ease;
}

.search-input:focus {
  outline: none;
  border-color: #3b82f6;
  box-shadow: 0 0 0 3px rgba(59, 130, 246, .15);
  width: 280px;
}

.search-icon {
  position: absolute;
  left: 10px;
  top: 50%;
  transform: translateY(-50%);
  width: 14px;
  height: 14px;
  color: #94a3b8;
  pointer-events: none;
}

.search-results {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  margin-top: 6px;
  background: white;
  border: 1px solid #e2e8f0;
  border-radius: 12px;
  box-shadow: 0 12px 32px rgba(15, 23, 42, .12);
  max-height: 320px;
  overflow-y: auto;
  z-index: 200;
  display: none;
}

.search-results.visible {
  display: block;
}

.search-result-item {
  padding: 10px 14px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 12px;
  color: #334155;
  border-bottom: 1px solid #f1f5f9;
  transition: background .15s;
}

.search-result-item:last-child {
  border-bottom: none;
}

.search-result-item:hover {
  background: #f8fafc;
}

.search-result-item .sr-type {
  font-size: 9px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .5px;
  padding: 3px 8px;
  border-radius: 6px;
  background: #f1f5f9;
  color: #64748b;
  white-space: nowrap;
}

.search-result-item .sr-label {
  font-weight: 600;
  color: #1e293b;
}

.search-result-item .sr-sub {
  color: #94a3b8;
  font-size: 11px;
  margin-left: auto;
}

[data-theme="dark"] .search-input {
  background: var(--bg-input);
  color: var(--text-primary);
  border-color: var(--border-primary);
}

[data-theme="dark"] .search-results {
  background: var(--bg-card);
  border-color: var(--border-primary);
}

[data-theme="dark"] .search-result-item {
  color: var(--text-secondary);
  border-color: var(--border-light);
}

[data-theme="dark"] .search-result-item:hover {
  background: var(--bg-card-hover);
}

[data-theme="dark"] .search-result-item .sr-label {
  color: var(--text-primary);
}

[data-theme="dark"] .search-result-item .sr-type {
  background: var(--bg-toggle);
  color: var(--text-muted);
}

/* === KEYBOARD SHORTCUTS PANEL === */
.kb-panel {
  position: fixed;
  bottom: 16px;
  right: 16px;
  z-index: 500;
  background: white;
  border: 1px solid #e2e8f0;
  border-radius: 14px;
  box-shadow: 0 8px 32px rgba(15, 23, 42, .12);
  padding: 0;
  font-size: 11px;
  width: 220px;
  overflow: hidden;
  transition: all .3s ease;
  max-height: 40px;
  opacity: .7;
}

.kb-panel:hover,
.kb-panel.expanded {
  max-height: 400px;
  opacity: 1;
}

.kb-panel-toggle {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  cursor: pointer;
  font-weight: 600;
  color: #475569;
  user-select: none;
}

.kb-panel-toggle svg {
  width: 14px;
  height: 14px;
  flex-shrink: 0;
}

.kb-panel-body {
  padding: 0 14px 12px;
}

.kb-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 5px 0;
  color: #64748b;
}

.kb-key {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 22px;
  height: 20px;
  padding: 0 6px;
  background: #f1f5f9;
  border: 1px solid #e2e8f0;
  border-radius: 5px;
  font-size: 10px;
  font-weight: 700;
  color: #334155;
  font-family: 'Inter', monospace;
}

[data-theme="dark"] .kb-panel {
  background: var(--bg-card);
  border-color: var(--border-primary);
}

[data-theme="dark"] .kb-panel-toggle {
  color: var(--text-secondary);
}

[data-theme="dark"] .kb-row {
  color: var(--text-muted);
}

[data-theme="dark"] .kb-key {
  background: var(--bg-toggle);
  border-color: var(--border-primary);
  color: var(--text-primary);
}

/* === ALERTS BANNER === */
.alerts-banner {
  max-width: 1400px;
  margin: 12px auto 0;
  padding: 0 24px;
  display: none;
}

.alerts-banner.visible {
  display: block;
}

.alert-card {
  background: linear-gradient(135deg, #fef2f2, #fff1f2);
  border: 1px solid #fecdd3;
  border-radius: 14px;
  padding: 14px 18px;
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 12px;
  animation: fadeIn .4s ease-out forwards;
  opacity: 0;
  transform: translateY(8px);
}

.alert-card.warning {
  background: linear-gradient(135deg, #fffbeb, #fef9c3);
  border-color: #fde68a;
}

.alert-card.info {
  background: linear-gradient(135deg, #eff6ff, #dbeafe);
  border-color: #93c5fd;
}

.alert-icon {
  font-size: 18px;
  flex-shrink: 0;
}

.alert-text {
  flex: 1;
  color: #1e293b;
}

.alert-text strong {
  font-weight: 700;
}

.alert-count-badge {
  padding: 4px 10px;
  border-radius: 9999px;
  font-size: 10px;
  font-weight: 700;
  background: #ef4444;
  color: white;
}

[data-theme="dark"] .alert-card {
  background: linear-gradient(135deg, #450a0a, #4c0519);
  border-color: #881337;
}

[data-theme="dark"] .alert-card.warning {
  background: linear-gradient(135deg, #451a03, #422006);
  border-color: #92400e;
}

[data-theme="dark"] .alert-card.info {
  background: linear-gradient(135deg, #172554, #1e3a5f);
  border-color: #1e40af;
}

[data-theme="dark"] .alert-text {
  color: var(--text-primary);
}

/* === DATE RANGE FILTER === */
.date-range-wrap {
  display: flex;
  align-items: center;
  gap: 6px;
}

.date-input {
  padding: 7px 10px;
  border-radius: 8px;
  border: 1px solid #e2e8f0;
  font-size: 11px;
  font-family: 'Inter', sans-serif;
  color: #1e293b;
  background: white;
  width: 120px;
}

.date-input:focus {
  outline: none;
  border-color: #3b82f6;
  box-shadow: 0 0 0 3px rgba(59, 130, 246, .15);
}

.date-preset-btn {
  padding: 6px 12px;
  border-radius: 8px;
  border: 1px solid #e2e8f0;
  font-size: 10px;
  font-weight: 600;
  color: #64748b;
  background: white;
  cursor: pointer;
  transition: all .15s;
  font-family: 'Inter', sans-serif;
}

.date-preset-btn:hover,
.date-preset-btn.active {
  background: #3b82f6;
  color: white;
  border-color: #3b82f6;
}

[data-theme="dark"] .date-input {
  background: var(--bg-input);
  color: var(--text-primary);
  border-color: var(--border-primary);
}

[data-theme="dark"] .date-preset-btn {
  background: var(--bg-card);
  color: var(--text-muted);
  border-color: var(--border-primary);
}

[data-theme="dark"] .date-preset-btn:hover,
[data-theme="dark"] .date-preset-btn.active {
  background: #3b82f6;
  color: white;
  border-color: #3b82f6;
}

/* === EXPORT BUTTONS === */
.export-btns {
  display: flex;
  gap: 6px;
}

.export-btn {
  padding: 6px 14px;
  border-radius: 8px;
  border: 1px solid #e2e8f0;
  font-size: 11px;
  font-weight: 600;
  color: #475569;
  background: white;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 5px;
  font-family: 'Inter', sans-serif;
  transition: all .15s;
}

.export-btn:hover {
  border-color: #3b82f6;
  color: #3b82f6;
}

.export-btn svg {
  width: 13px;
  height: 13px;
}

[data-theme="dark"] .export-btn {
  background: var(--bg-card);
  color: var(--text-muted);
  border-color: var(--border-primary);
}

/* === SKELETON LOADING === */
.skeleton {
  position: relative;
  overflow: hidden;
  background: #e2e8f0;
  border-radius: 8px;
}

.skeleton::after {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 200%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, .4), transparent);
  animation: shimmer 1.5s infinite;
}

@keyframes shimmer {
  to {
    transform: translateX(100%);
  }
}

[data-theme="dark"] .skeleton {
  background: #334155;
}

[data-theme="dark"] .skeleton::after {
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, .08), transparent);
}

.skeleton-card {
  height: 120px;
  border-radius: 16px;
}

.skeleton-bar {
  height: 280px;
  border-radius: 14px;
}

.skeleton-row {
  height: 18px;
  margin-bottom: 8px;
  width: 80%;
}

/* === SPARKLINE === */
.kpi-sparkline {
  margin-top: 8px;
  height: 30px;
}

.kpi-sparkline canvas {
  width: 100% !important;
  height: 30px !important;
}

/* === COMPARISON MODE === */
.comparison-grid {
  max-width: 1400px;
  margin: 24px auto;
  padding: 0 24px;
  display: none;
  gap: 16px;
}

.comparison-grid.active {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
}

.comparison-card {
  background: white;
  border: 1px solid #e2e8f0;
  border-radius: 16px;
  padding: 20px;
  box-shadow: var(--shadow-card);
  animation: fadeIn .4s ease-out forwards;
  opacity: 0;
  transform: translateY(12px);
}

.comparison-card h3 {
  font-size: 15px;
  font-weight: 700;
  color: #0f172a;
  margin-bottom: 14px;
}

.comparison-stat {
  display: flex;
  justify-content: space-between;
  padding: 6px 0;
  font-size: 12px;
}

.comparison-stat span:first-child {
  color: #64748b;
}

.comparison-stat span:last-child {
  font-weight: 600;
  color: #1e293b;
}

[data-theme="dark"] .comparison-card {
  background: var(--bg-card);
  border-color: var(--border-primary);
}

[data-theme="dark"] .comparison-card h3 {
  color: var(--text-primary);
}

[data-theme="dark"] .comparison-stat span:last-child {
  color: var(--text-primary);
}

/* === CHURN RISK BADGE === */
.risk-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 9px;
  border-radius: 9999px;
  font-size: 9px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .3px;
}

.risk-high {
  background: #fee2e2;
  color: #b91c1c;
}

.risk-medium {
  background: #fef3c7;
  color: #92400e;
}

.risk-low {
  background: #dcfce7;
  color: #166534;
}

/* === COUNTER ANIMATION === */
.kpi-value[data-target] {
  transition: none;
}

/* === RESPONSIVE === */
@media (max-width: 1024px) {
  .kpi-row {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .metrics-grid.triple {
    grid-template-columns: 1fr 1fr;
  }

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

  .filter-bar {
    gap: 8px;
  }

  .search-input {
    width: 160px;
  }

  .search-input:focus {
    width: 200px;
  }
}

@media (max-width: 768px) {
  .page-header {
    padding: 20px 16px;
  }

  .page-header h1 {
    font-size: 18px;
  }

  .client-selector-bar {
    padding: 10px 16px;
    flex-wrap: wrap;
    gap: 8px;
  }

  .kpi-row {
    grid-template-columns: 1fr;
  }

  .metrics-grid.triple {
    grid-template-columns: 1fr;
  }

  .dashboard-grid {
    padding: 0 12px;
    gap: 16px;
  }

  .scd-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .apps-container {
    flex-direction: column;
  }

  .filter-bar {
    flex-wrap: wrap;
  }

  .date-range-wrap {
    flex-wrap: wrap;
  }

  .view-toggle {
    margin-left: 0;
    width: 100%;
    justify-content: center;
  }

  .kb-panel {
    bottom: 8px;
    right: 8px;
    width: 190px;
  }

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

@media (max-width: 480px) {
  .search-wrap {
    width: 100%;
  }

  .search-input,
  .search-input:focus {
    width: 100%;
  }

  .view-toggle .view-sublabel {
    display: none;
  }
}