:root {
  --bg-body: #f4f6fa;
  --bg-surface: #ffffff;
  --bg-subtle: #f8fafc;
  --bg-hover: #f1f5f9;
  --border-color: #e2e8f0;
  --border-strong: #cbd5e1;
  --text-main: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;
  --primary: #1a73e8;
  --primary-light: #e8f0fe;
  --primary-dark: #1557b0;
  --accent-indigo: #4f46e5;
  --accent-emerald: #10b981;
  --accent-emerald-bg: #ecfdf5;
  --accent-amber: #f59e0b;
  --accent-amber-bg: #fffbeb;
  --accent-rose: #ef4444;
  --accent-rose-bg: #fef2f2;
  --accent-purple: #8b5cf6;
  --shadow-sm: 0 1px 2px 0 rgba(15, 23, 42, 0.04);
  --shadow-md: 0 4px 12px -2px rgba(15, 23, 42, 0.06), 0 2px 4px -2px rgba(15, 23, 42, 0.04);
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
}

[data-theme="dark"] {
  --bg-body: #0b0f19;
  --bg-surface: #111827;
  --bg-subtle: #1e293b;
  --bg-hover: #263349;
  --border-color: #1f2937;
  --border-strong: #374151;
  --text-main: #f8fafc;
  --text-secondary: #cbd5e1;
  --text-muted: #94a3b8;
  --primary: #3b82f6;
  --primary-light: rgba(59, 130, 246, 0.15);
  --primary-dark: #60a5fa;
  --accent-emerald-bg: rgba(16, 185, 129, 0.14);
  --accent-amber-bg: rgba(245, 158, 11, 0.14);
  --accent-rose-bg: rgba(239, 68, 68, 0.14);
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 12px -2px rgba(0, 0, 0, 0.4);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background-color: var(--bg-body);
  color: var(--text-main);
  line-height: 1.5;
  font-size: 13.5px;
  -webkit-font-smoothing: antialiased;
}

/* Header / Topbar (Looker Studio Style) */
.topbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border-color);
  padding: 10px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  box-shadow: var(--shadow-sm);
}

.brand-group {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-logo {
  width: 38px;
  height: 38px;
  border-radius: 9px;
  background: linear-gradient(135deg, #1a73e8 0%, #4f46e5 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 700;
  font-size: 18px;
  box-shadow: 0 2px 8px rgba(26, 115, 232, 0.3);
}

.brand-title h1 {
  font-size: 16px;
  font-weight: 700;
  letter-spacing: -0.01em;
  display: flex;
  align-items: center;
  gap: 8px;
}

.badge-live {
  font-size: 11px;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 999px;
  background: var(--accent-emerald-bg);
  color: var(--accent-emerald);
  display: inline-flex;
  align-items: center;
  gap: 5px;
}

.badge-live::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-emerald);
  display: inline-block;
}

.brand-subtitle {
  font-size: 12px;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 10px;
}

.brand-subtitle a {
  color: var(--primary);
  text-decoration: none;
  font-weight: 500;
}

.brand-subtitle a:hover {
  text-decoration: underline;
}

/* Navigation Tabs */
.nav-tabs {
  display: flex;
  align-items: center;
  gap: 4px;
  background: var(--bg-subtle);
  padding: 4px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
}

.nav-tab {
  border: none;
  background: transparent;
  color: var(--text-secondary);
  font-size: 13px;
  font-weight: 600;
  padding: 7px 14px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.15s ease;
  display: flex;
  align-items: center;
  gap: 6px;
}

.nav-tab:hover {
  color: var(--text-main);
  background: var(--bg-hover);
}

.nav-tab.active {
  background: var(--bg-surface);
  color: var(--primary);
  box-shadow: var(--shadow-sm);
}

.topbar-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 13px;
  border-radius: var(--radius-sm);
  font-size: 12.5px;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid var(--border-color);
  background: var(--bg-surface);
  color: var(--text-main);
  transition: all 0.15s ease;
  text-decoration: none;
}

.btn:hover {
  background: var(--bg-hover);
  border-color: var(--border-strong);
}

.btn-primary {
  background: var(--primary);
  color: #ffffff;
  border-color: var(--primary);
}

.btn-primary:hover {
  background: var(--primary-dark);
  border-color: var(--primary-dark);
}

/* Filter Bar */
.filter-bar {
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border-color);
  padding: 12px 24px;
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  gap: 12px;
}

.filter-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 140px;
}

.filter-item label {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--text-muted);
}

.filter-control {
  height: 34px;
  padding: 0 10px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
  background: var(--bg-subtle);
  color: var(--text-main);
  font-size: 12.5px;
  font-family: inherit;
  outline: none;
  transition: border-color 0.15s;
}

.filter-control:focus {
  border-color: var(--primary);
  background: var(--bg-surface);
}

.date-group {
  display: flex;
  align-items: center;
  gap: 6px;
}

.quick-chips {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-left: auto;
  flex-wrap: wrap;
}

.chip {
  font-size: 12px;
  font-weight: 500;
  padding: 5px 10px;
  border-radius: 999px;
  border: 1px solid var(--border-color);
  background: var(--bg-subtle);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.15s;
}

.chip:hover, .chip.active {
  background: var(--primary-light);
  color: var(--primary);
  border-color: var(--primary);
  font-weight: 600;
}

/* Container */
.container {
  max-width: 1600px;
  margin: 0 auto;
  padding: 20px 24px 48px;
}

.tab-pane {
  display: none;
}

.tab-pane.active {
  display: block;
}

/* Alert Banner */
.insight-banner {
  background: linear-gradient(90deg, rgba(26, 115, 232, 0.08) 0%, rgba(79, 70, 229, 0.06) 100%);
  border: 1px solid rgba(26, 115, 232, 0.25);
  border-radius: var(--radius-md);
  padding: 12px 16px;
  margin-bottom: 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.insight-banner-text {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  color: var(--text-main);
}

/* KPI Scorecards Grid */
.kpi-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(195px, 1fr));
  gap: 14px;
  margin-bottom: 20px;
}

.kpi-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 15px 16px;
  box-shadow: var(--shadow-sm);
  position: relative;
  overflow: hidden;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.kpi-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.kpi-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--kpi-color, var(--primary));
}

.kpi-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 11.5px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--text-muted);
  margin-bottom: 6px;
}

.kpi-value {
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-main);
  margin-bottom: 6px;
}

.kpi-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 11.5px;
  color: var(--text-muted);
}

.delta-badge {
  display: inline-flex;
  align-items: center;
  gap: 3px;
  font-weight: 600;
  padding: 1px 6px;
  border-radius: 4px;
  font-size: 11px;
}

.delta-up {
  background: var(--accent-emerald-bg);
  color: var(--accent-emerald);
}

.delta-down {
  background: var(--accent-rose-bg);
  color: var(--accent-rose);
}

.delta-neutral {
  background: var(--bg-subtle);
  color: var(--text-muted);
}

/* Charts Layout */
.charts-grid-2 {
  display: grid;
  grid-template-columns: 1.65fr 1fr;
  gap: 16px;
  margin-bottom: 18px;
}

.charts-grid-equal {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 18px;
}

@media (max-width: 1100px) {
  .charts-grid-2, .charts-grid-equal {
    grid-template-columns: 1fr;
  }
}

.card {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  margin-bottom: 18px;
  overflow: hidden;
}

.card-header {
  padding: 14px 18px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.card-title {
  font-size: 14.5px;
  font-weight: 700;
  color: var(--text-main);
  display: flex;
  align-items: center;
  gap: 8px;
}

.card-subtitle {
  font-size: 12px;
  color: var(--text-muted);
  font-weight: 400;
}

.card-body {
  padding: 16px 18px;
}

.chart-container {
  position: relative;
  height: 320px;
  width: 100%;
}

.chart-container-sm {
  position: relative;
  height: 270px;
  width: 100%;
}

/* Data Tables (Looker Studio Style) */
.table-responsive {
  width: 100%;
  overflow-x: auto;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 12.5px;
  white-space: nowrap;
}

.data-table th {
  background: var(--bg-subtle);
  color: var(--text-secondary);
  font-weight: 600;
  text-transform: uppercase;
  font-size: 11px;
  letter-spacing: 0.03em;
  padding: 10px 12px;
  border-bottom: 2px solid var(--border-color);
  text-align: left;
  cursor: pointer;
  user-select: none;
  transition: background 0.15s;
}

.data-table th:hover {
  background: var(--bg-hover);
  color: var(--text-main);
}

.data-table th.num, .data-table td.num {
  text-align: right;
  font-variant-numeric: tabular-nums;
}

.data-table td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--border-color);
  color: var(--text-main);
}

.data-table tbody tr:hover {
  background: var(--bg-hover);
}

.data-table tfoot td {
  background: var(--bg-subtle);
  font-weight: 700;
  border-top: 2px solid var(--border-strong);
  padding: 11px 12px;
}

/* In-cell bar (Looker Studio metric bar) */
.bar-cell {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 3px;
}

.bar-track {
  width: 90px;
  height: 5px;
  background: var(--bg-subtle);
  border-radius: 999px;
  overflow: hidden;
}

.bar-fill {
  height: 100%;
  border-radius: 999px;
  background: var(--primary);
}

/* Status & Diagnostic Pills */
.status-pill {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 3px 8px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 600;
}

.status-on {
  background: var(--accent-emerald-bg);
  color: var(--accent-emerald);
}

.status-off {
  background: var(--accent-rose-bg);
  color: var(--accent-rose);
}

.diag-pill {
  display: inline-block;
  padding: 3px 8px;
  border-radius: 5px;
  font-size: 11px;
  font-weight: 600;
}

.diag-good {
  background: var(--accent-emerald-bg);
  color: var(--accent-emerald);
}

.diag-warn {
  background: var(--accent-amber-bg);
  color: var(--accent-amber);
}

.diag-bad {
  background: var(--accent-rose-bg);
  color: var(--accent-rose);
}

/* Optimization Cards */
.anomaly-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 14px;
  margin-bottom: 18px;
}

.anomaly-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-left: 4px solid var(--primary);
  border-radius: var(--radius-md);
  padding: 14px 16px;
  box-shadow: var(--shadow-sm);
}

.anomaly-card.warn {
  border-left-color: var(--accent-amber);
}

.anomaly-card.danger {
  border-left-color: var(--accent-rose);
}

.anomaly-card.success {
  border-left-color: var(--accent-emerald);
}

.anomaly-card h4 {
  font-size: 13.5px;
  font-weight: 700;
  margin-bottom: 5px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.anomaly-card p {
  font-size: 12.5px;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* Pagination */
.pagination-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 18px;
  border-top: 1px solid var(--border-color);
  background: var(--bg-subtle);
  font-size: 12.5px;
}

/* Modal */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.55);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 200;
  padding: 16px;
}

.modal-backdrop.open {
  display: flex;
}

.modal-box {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  max-width: 540px;
  width: 100%;
  padding: 22px;
  box-shadow: var(--shadow-md);
}

.modal-box h3 {
  font-size: 16px;
  margin-bottom: 8px;
}

.modal-box p {
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 14px;
}

.form-row {
  margin-bottom: 12px;
}

.form-row label {
  display: block;
  font-size: 12px;
  font-weight: 600;
  margin-bottom: 4px;
}

.form-row input {
  width: 100%;
  height: 36px;
  padding: 0 10px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  background: var(--bg-subtle);
  color: var(--text-main);
}

@media print {
  .topbar-actions, .filter-bar, .nav-tabs {
    display: none !important;
  }
  .tab-pane {
    display: block !important;
  }
}