/* ============================================================
   Component Styles
   Scenario Comparison Dashboard v1
   ============================================================ */

/* --- Header --- */
.app-header {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-md) var(--space-xl);
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 56px;
}

.app-header__title {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-primary);
  margin: 0;
}

.app-header__brand {
  font-size: var(--font-size-sm);
  color: var(--color-text-tertiary);
  font-weight: var(--font-weight-medium);
  letter-spacing: 0.5px;
}

/* --- Tab Navigation --- */
.tab-nav {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  padding: 0 var(--space-xl);
  display: flex;
  gap: var(--space-xs);
}

.tab-nav__item {
  padding: var(--space-md) var(--space-lg);
  font-size: var(--font-size-md);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-secondary);
  border: none;
  background: none;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  transition: all var(--transition-fast);
  font-family: var(--font-family-primary);
}

.tab-nav__item:hover {
  color: var(--color-primary);
  background: var(--color-primary-bg);
}

.tab-nav__item--active {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
  font-weight: var(--font-weight-semibold);
}

/* --- Filter Bar --- */
.filter-bar {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-md) var(--space-xl);
  display: flex;
  align-items: center;
  gap: var(--space-md);
  flex-wrap: wrap;
}

.filter-group {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.filter-group__label {
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  white-space: nowrap;
}

.filter-select {
  appearance: none;
  -webkit-appearance: none;
  font-family: var(--font-family-primary);
  font-size: var(--font-size-sm);
  color: var(--color-text-primary);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 6px 32px 6px 10px;
  cursor: pointer;
  transition: border-color var(--transition-fast);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%236B7280' d='M3 5l3 3 3-3'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 10px center;
  min-width: 120px;
}

.filter-select:hover {
  border-color: var(--color-primary);
}

.filter-select:focus {
  border-color: var(--color-primary);
  outline: 2px solid var(--color-primary);
  outline-offset: 1px;
}

.filter-select--scenario-a {
  border-color: var(--chart-scenario-a);
  border-width: 2px;
}

.filter-select--scenario-b {
  border-color: var(--chart-scenario-b);
  border-width: 2px;
}

.filter-divider {
  width: 1px;
  height: 28px;
  background: var(--color-border);
  margin: 0 var(--space-sm);
}

.filter-clear-btn {
  font-family: var(--font-family-primary);
  font-size: var(--font-size-xs);
  color: var(--color-primary);
  background: none;
  border: 1px solid var(--color-primary);
  border-radius: var(--radius-md);
  padding: 5px 12px;
  cursor: pointer;
  transition: all var(--transition-fast);
  font-weight: var(--font-weight-medium);
}

.filter-clear-btn:hover {
  background: var(--color-primary);
  color: white;
}

/* --- KPI Cards --- */
.kpi-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: var(--space-md);
  padding: var(--space-lg) var(--space-xl);
}

.kpi-section {
  display: flex;
  gap: var(--space-md);
}

.kpi-card {
  background: var(--color-surface);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-xs);
  min-width: 0;
  transition: box-shadow var(--transition-fast);
}

.kpi-card:hover {
  box-shadow: var(--shadow-md);
}

.kpi-card__label {
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-sm);
  text-transform: uppercase;
  letter-spacing: 0.3px;
}

.kpi-card__value {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-primary);
  line-height: var(--line-height-tight);
}

.kpi-card__value--scenario-a {
  color: var(--chart-scenario-a);
}

.kpi-card__value--scenario-b {
  color: var(--chart-scenario-b-text);
}

.kpi-card__value--positive {
  color: var(--color-success);
}

.kpi-card__value--negative {
  color: var(--color-error);
}

.kpi-card__value--neutral {
  color: var(--color-text-secondary);
}

.kpi-card__delta {
  font-size: var(--font-size-sm);
  margin-top: var(--space-xs);
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.kpi-card__delta--positive { color: var(--color-success); }
.kpi-card__delta--negative { color: var(--color-error); }
.kpi-card__delta--neutral { color: var(--color-text-tertiary); }

.kpi-card--diff {
  background: var(--color-background);
  border-style: dashed;
}

/* --- Chart Cards --- */
.chart-card {
  background: var(--color-surface);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-xs);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.chart-card__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-lg) var(--space-lg) var(--space-sm);
}

.chart-card__title {
  font-size: var(--font-size-md);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-primary);
  margin: 0;
}

.chart-card__subtitle {
  font-size: var(--font-size-xs);
  color: var(--color-text-tertiary);
  margin-top: 2px;
}

.chart-card__controls {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.chart-card__body {
  padding: var(--space-sm) var(--space-lg) var(--space-lg);
  flex: 1;
  position: relative;
  min-height: 280px;
}

.chart-card__body--compact {
  min-height: 260px;
}

.chart-card__body--tall {
  min-height: 380px;
}

.chart-card__body--padded {
  padding: var(--space-lg);
}

.chart-card__body canvas {
  width: 100% !important;
  height: 100% !important;
}

/* --- Sub Tabs (Trending) --- */
.sub-tabs {
  display: flex;
  gap: var(--space-xs);
  padding: 0 var(--space-lg);
  border-bottom: 1px solid var(--color-border-light);
}

.sub-tab {
  padding: var(--space-sm) var(--space-lg);
  font-family: var(--font-family-primary);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-secondary);
  border: none;
  background: none;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  transition: all var(--transition-fast);
}

.sub-tab:hover {
  color: var(--color-primary);
}

.sub-tab--active {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}

/* --- Legend --- */
.chart-legend {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
  padding: var(--space-sm) var(--space-lg) var(--space-md);
  font-size: var(--font-size-xs);
  color: var(--color-text-secondary);
}

.chart-legend__item {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.chart-legend__dot {
  width: 10px;
  height: 10px;
  border-radius: var(--radius-full);
  display: inline-block;
}

.chart-legend__dot--a { background: var(--chart-scenario-a); }
.chart-legend__dot--b { background: var(--chart-scenario-b); }

/* --- Detail Table --- */
.data-table-wrapper {
  overflow-x: auto;
  padding: var(--space-lg);
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--font-size-sm);
}

.data-table th {
  text-align: left;
  font-weight: var(--font-weight-semibold);
  font-size: var(--font-size-xs);
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.3px;
  padding: var(--space-sm) var(--space-md);
  border-bottom: 2px solid var(--color-border);
  white-space: nowrap;
  position: sticky;
  top: 0;
  background: var(--color-surface);
}

.data-table td {
  padding: var(--space-sm) var(--space-md);
  border-bottom: 1px solid var(--color-border-light);
  color: var(--color-text-primary);
}

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

.data-table .cell--positive { color: var(--color-success); font-weight: var(--font-weight-medium); }
.data-table .cell--negative { color: var(--color-error); font-weight: var(--font-weight-medium); }
.data-table .cell--scenario-a { color: var(--chart-scenario-a); }
.data-table .cell--scenario-b { color: var(--chart-scenario-b-text); }

/* --- Selection Banner --- */
.selection-banner {
  background: var(--color-info-bg);
  border-bottom: 1px solid #BFDBFE;
  padding: var(--space-sm) var(--space-xl);
  font-size: var(--font-size-sm);
  color: var(--color-info);
  display: none;
  align-items: center;
  gap: var(--space-sm);
}

.selection-banner.active {
  display: flex;
}

.selection-banner__clear {
  margin-left: auto;
  font-family: var(--font-family-primary);
  font-size: var(--font-size-xs);
  color: var(--color-info);
  background: none;
  border: none;
  cursor: pointer;
  text-decoration: underline;
}

/* --- Tooltip custom --- */
.chart-card__dropdown {
  font-family: var(--font-family-primary);
  font-size: var(--font-size-xs);
  padding: 4px 24px 4px 8px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  color: var(--color-text-primary);
  cursor: pointer;
  appearance: none;
  -webkit-appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='10' viewBox='0 0 10 10'%3E%3Cpath fill='%236B7280' d='M2 4l3 3 3-3'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 6px center;
}

/* --- Tab Panels --- */
.tab-panel {
  display: none;
}

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

/* --- Focus Styles (Accessibility) --- */
.tab-nav__item:focus-visible,
.sub-tab:focus-visible,
.filter-select:focus-visible,
.filter-clear-btn:focus-visible,
.chart-card__dropdown:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

/* --- Skip Navigation --- */
.skip-nav {
  position: absolute;
  top: -100px;
  left: var(--space-lg);
  background: var(--color-primary);
  color: white;
  padding: var(--space-sm) var(--space-lg);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  z-index: 100;
  text-decoration: none;
  transition: top var(--transition-fast);
}

.skip-nav:focus {
  top: var(--space-sm);
}

/* --- Data Refreshed Indicator --- */
.app-header__meta {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
}

.app-header__timestamp {
  font-size: var(--font-size-xs);
  color: var(--color-text-tertiary);
}

.app-header__timestamp::before {
  content: '\25CF';
  color: var(--color-success);
  margin-right: var(--space-xs);
  font-size: 8px;
}

/* --- Sortable Table --- */
.data-table th.sortable {
  cursor: pointer;
  user-select: none;
  position: relative;
  padding-right: 20px;
}

.data-table th.sortable:hover {
  color: var(--color-primary);
}

.data-table th.sortable::after {
  content: '\2195';
  position: absolute;
  right: 4px;
  font-size: 10px;
  color: var(--color-text-tertiary);
}

.data-table th.sort-asc::after {
  content: '\2191';
  color: var(--color-primary);
}

.data-table th.sort-desc::after {
  content: '\2193';
  color: var(--color-primary);
}

/* --- KPI Trend Arrow --- */
.kpi-card__trend {
  display: inline-flex;
  align-items: center;
  gap: 2px;
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  margin-top: var(--space-xs);
}

.kpi-card__trend--up { color: var(--color-error); }
.kpi-card__trend--down { color: var(--color-success); }
.kpi-card__trend--flat { color: var(--color-text-tertiary); }

/* --- Scatter Reference Line Annotation --- */
.scatter-annotation {
  font-size: var(--font-size-xs);
  color: var(--color-text-tertiary);
  padding: var(--space-xs) var(--space-lg);
  font-style: italic;
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.scatter-annotation::before {
  content: '';
  display: inline-block;
  width: 20px;
  height: 0;
  border-top: 1.5px dashed var(--color-text-tertiary);
}

/* --- Scatter Legend --- */
.scatter-legend {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
  padding: var(--space-xs) var(--space-lg) var(--space-md);
  font-size: var(--font-size-xs);
  color: var(--color-text-secondary);
}

.scatter-legend__item {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.scatter-legend__dot {
  width: 8px;
  height: 8px;
  border-radius: var(--radius-full);
  display: inline-block;
}

.scatter-legend__dot--triangle {
  border-radius: 0;
  width: 0;
  height: 0;
  background: none !important;
  border-left: 5px solid transparent;
  border-right: 5px solid transparent;
  border-bottom: 8px solid var(--chart-scenario-b);
}

/* --- Insights Card Styles --- */
.insights-list {
  list-style: none;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  font-size: var(--font-size-sm);
  color: var(--color-text-primary);
}

.insights-list__item {
  padding: 10px 12px;
  border-radius: var(--radius-md);
  border-left: 3px solid var(--color-text-tertiary);
  background: var(--color-background);
  line-height: 1.5;
}

.insights-list__item--positive {
  background: var(--color-success-bg);
  border-left-color: var(--color-success);
}

.insights-list__item--warning {
  background: var(--color-warning-bg);
  border-left-color: var(--color-warning);
}

.insights-list__item--neutral {
  background: var(--color-background);
  border-left-color: var(--color-text-tertiary);
}

/* --- Qlik Implementation Note Badge --- */
.qlik-note {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  font-size: var(--font-size-xs);
  color: var(--color-info);
  background: var(--color-info-bg);
  padding: 2px 8px;
  border-radius: var(--radius-full);
  font-weight: var(--font-weight-medium);
}

/* --- Same-Scenario Warning --- */
.same-scenario-warning {
  background: var(--color-warning-bg);
  border-bottom: 1px solid var(--color-warning);
  padding: var(--space-sm) var(--space-xl);
  font-size: var(--font-size-sm);
  color: #92400E;
  font-weight: var(--font-weight-medium);
}

.same-scenario-warning[hidden] {
  display: none;
}