/* Stats Table Component (World-Class CFB Stats Display)
 * -------------------------------------------------------------------------
 * Canonical column sequences, mobile-first responsive behavior, tabular
 * numerals, sticky first column, tap-triggered definitions.
 *
 * Spec: docs/research/cfb-stats-conformance-spec.md
 * Mobile: docs/research/cfb-stats-mobile-playbook.md
 * Anti-patterns: docs/research/cfb-stats-antipatterns.md
 */

/* =============================================================================
   NAMESPACE: wcfb-stats- (prevents collisions with legacy table styles)
   ========================================================================== */

/* -----------------------------------------------------------------------------
   TABLE WRAPPER — Horizontal scroll container
   ----------------------------------------------------------------------------- */
.wcfb-stats-wrap {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  /* Prevent page-level horizontal scroll */
  max-width: 100%;
}

/* -----------------------------------------------------------------------------
   BASE TABLE — Semantic HTML table with tabular numerals
   ----------------------------------------------------------------------------- */
.wcfb-stats-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  font-variant-numeric: tabular-nums lining-nums;
  font-family: var(--font-body, var(--sans, "Inter", system-ui, sans-serif));
  font-size: 13px;
  line-height: 1.4;
  color: var(--fg-primary, var(--foreground, #1a1a2e));
  background: var(--bg-default, var(--background, #ffffff));
}

/* -----------------------------------------------------------------------------
   STICKY FIRST COLUMN — Never lose the identifying column
   ----------------------------------------------------------------------------- */
.wcfb-stats-table th:first-child,
.wcfb-stats-table td:first-child {
  position: sticky;
  left: 0;
  z-index: 2;
  background: var(--bg-default, var(--background, #ffffff));
  box-shadow: none;
}

/* iOS Safari bug fix: nested scroll containers require transform */
.wcfb-stats-wrap {
  transform: translateZ(0);
}

/* "L" configuration — top-left cell sticks both ways */
.wcfb-stats-table thead tr:first-child th:first-child {
  z-index: 4;
  position: sticky;
  left: 0;
  top: 0;
}

/* -----------------------------------------------------------------------------
   HEADERS — Sortable with 44×44px tap targets
   ----------------------------------------------------------------------------- */
.wcfb-stats-table th {
  position: relative;
  text-align: left;
  padding: 0;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: none;
  font-size: 11px;
  white-space: nowrap;
  border-bottom: 1px solid var(--stroke-default, rgba(0, 0, 0, 0.12));
  background: var(--bg-subtle, var(--muted, #f8f9fa));
}

/* Sortable header button — meets WCAG 2.5.5 (44×44px) */
.wcfb-stats-table th.wcfb-sortable {
  cursor: pointer;
  user-select: none;
}

.wcfb-stats-table th .wcfb-sort-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  min-width: 44px;
  padding: 8px 12px;
  background: transparent;
  border: none;
  cursor: pointer;
  color: inherit;
  font-family: inherit;
  font-size: inherit;
  font-weight: inherit;
  letter-spacing: inherit;
  text-transform: inherit;
}

.wcfb-stats-table th .wcfb-sort-btn:hover,
.wcfb-stats-table th .wcfb-sort-btn:focus-visible {
  background: var(--bg-hover, rgba(0, 0, 0, 0.04));
}

/* Sort arrow affordance */
.wcfb-stats-table th .wcfb-sort-icon {
  margin-left: 4px;
  opacity: 0.4;
  transition: opacity 120ms ease, transform 120ms ease;
}

.wcfb-stats-table th[aria-sort="ascending"] .wcfb-sort-icon {
  opacity: 1;
  transform: rotate(180deg);
}

.wcfb-stats-table th[aria-sort="descending"] .wcfb-sort-icon {
  opacity: 1;
  transform: rotate(0deg);
}

/* Advanced stat definition trigger */
.wcfb-stats-table th .wcfb-def-trigger {
  margin-left: 4px;
  opacity: 0.5;
  cursor: help;
}

.wcfb-stats-table th .wcfb-def-trigger:hover {
  opacity: 1;
}

/* -----------------------------------------------------------------------------
   DATA CELLS — Alignment and padding
   ----------------------------------------------------------------------------- */
.wcfb-stats-table td {
  padding: 8px 12px;
  border-bottom: 1px solid var(--stroke-subtle, rgba(0, 0, 0, 0.06));
}

/* Right-align numeric columns */
.wcfb-stats-table td.wcfb-align-right,
.wcfb-stats-table th.wcfb-align-right {
  text-align: right;
}

.wcfb-stats-table td.wcfb-align-center,
.wcfb-stats-table th.wcfb-align-center {
  text-align: center;
}

/* -----------------------------------------------------------------------------
   ROW STATES — Hover, zebra striping (optional)
   ----------------------------------------------------------------------------- */
.wcfb-stats-table tbody tr:hover {
  background: var(--bg-hover, rgba(0, 0, 0, 0.02));
}

.wcfb-stats-table tbody tr:nth-child(even) {
  background: var(--bg-zebra, rgba(0, 0, 0, 0.01));
}

.wcfb-stats-table tbody tr:nth-child(even):hover {
  background: var(--bg-hover, rgba(0, 0, 0, 0.02));
}

/* -----------------------------------------------------------------------------
   CROSS-LINKS — Player, team, opponent links with padded touch targets
   ----------------------------------------------------------------------------- */
.wcfb-stats-table a.wcfb-cross-link {
  color: var(--fg-link, var(--accent-primary, #0066cc));
  text-decoration: none;
  display: inline-block;
  padding: 8px 4px;
  margin: -8px -4px;
  border-radius: 4px;
  transition: background-color 120ms ease,
              color 120ms ease,
              text-decoration-color 120ms ease;
}

.wcfb-stats-table a.wcfb-cross-link:hover {
  background: var(--bg-hover, rgba(0, 102, 204, 0.08));
  text-decoration: underline;
  text-decoration-color: var(--fg-link, var(--accent-primary, #0066cc));
}

.wcfb-stats-table a.wcfb-cross-link:focus-visible {
  outline: 2px solid var(--accent-primary, #0066cc);
  outline-offset: -2px;
}

/* -----------------------------------------------------------------------------
   PERCENTILE BAR — Red→grey→blue diverging scale
   ----------------------------------------------------------------------------- */
.wcfb-percentile-bar {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  width: 100%;
  max-width: 200px;
  font-size: 11px;
}

.wcfb-percentile-bar__label {
  flex-shrink: 0;
  font-weight: 500;
  text-transform: none;
  letter-spacing: 0.04em;
  color: var(--fg-secondary, var(--muted-foreground, #6b7280));
}

.wcfb-percentile-bar__track {
  flex-grow: 1;
  height: 4px;
  background: var(--stroke-subtle, rgba(0, 0, 0, 0.12));
  border-radius: 2px;
  position: relative;
  overflow: hidden;
}

.wcfb-percentile-bar__fill {
  position: absolute;
  left: 0;
  top: 0;
  height: 100%;
  border-radius: 2px;
  transition: width 300ms ease;
}

/* Percentile color scale — red (low) → grey (mid) → blue (high) */
.wcfb-percentile-bar__fill[data-pct-low="true"] {
  background: #ef4444;
}
.wcfb-percentile-bar__fill[data-pct-mid="true"] {
  background: #9ca3af;
}
.wcfb-percentile-bar__fill[data-pct-high="true"] {
  background: #3b82f6;
}

.wcfb-percentile-bar__dot {
  position: absolute;
  top: 50%;
  width: 10px;
  height: 10px;
  background: var(--fg-primary, #1a1a2e);
  border: 2px solid var(--bg-default, #ffffff);
  border-radius: 50%;
  transform: translate(-50%, -50%);
  transition: left 300ms ease;
}

.wcfb-percentile-bar__value {
  flex-shrink: 0;
  font-weight: 600;
  color: var(--fg-primary, #1a1a2e);
}

.wcfb-percentile-bar__peer {
  flex-shrink: 0;
  color: var(--fg-secondary, var(--muted-foreground, #6b7280));
  font-size: 10px;
}

/* -----------------------------------------------------------------------------
   CONFIDENCE CHIP — Sample size signaling
   ----------------------------------------------------------------------------- */
.wcfb-confidence-chip {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 2px 6px;
  border-radius: 12px;
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.02em;
  text-transform: none;
}

.wcfb-confidence-chip--high {
  background: #dcfce7;
  color: #166534;
}
.wcfb-confidence-chip--medium {
  background: #fef9c3;
  color: #854d0e;
}
.wcfb-confidence-chip--low {
  background: #fee2e2;
  color: #991b1b;
}


/* -----------------------------------------------------------------------------
   MOBILE OPTIMIZATIONS — ≤768px viewport
   ----------------------------------------------------------------------------- */
@media (max-width: 768px) {
  /* Scroll hint at right edge */
  .wcfb-stats-wrap::after {
    content: "";
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    width: 32px;
    background: linear-gradient(to right, transparent, var(--bg-default, #ffffff));
    pointer-events: none;
    opacity: 0;
    transition: opacity 200ms ease;
  }

  .wcfb-stats-wrap.wcfb-scrolling::after {
    opacity: 1;
  }

  /* Larger tap targets for headers */
  .wcfb-stats-table th .wcfb-sort-btn {
    min-height: 48px;
    min-width: 48px;
  }

  /* Condensed row padding for density */
  .wcfb-stats-table td {
    padding: 10px 8px;
  }
}

/* -----------------------------------------------------------------------------
   REDUCED MOTION — Disable transitions for accessibility
   ----------------------------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  .wcfb-stats-table *,
  .wcfb-stats-table *::before,
  .wcfb-stats-table *::after {
    transition: none !important;
  }
}


/* -----------------------------------------------------------------------------
   PRINT STYLES — Clean output for printing
   ----------------------------------------------------------------------------- */
@media print {
  .wcfb-stats-wrap {
    overflow-x: visible;
  }

  .wcfb-stats-table {
    font-size: 10pt;
    page-break-inside: avoid;
  }

  .wcfb-stats-table th,
  .wcfb-stats-table td {
    border: 1px solid #000;
  }

  .wcfb-stats-table a.wcfb-cross-link {
    color: #000;
    text-decoration: underline;
  }

  .wcfb-percentile-bar__fill {
    -webkit-print-color-adjust: exact;
    print-color-adjust: exact;
  }

  .wcfb-stats-bottom-sheet,
  .wcfb-stats-popover {
    display: none !important;
  }
}

/* -----------------------------------------------------------------------------
   BOTTOM SHEET (Mobile) — Stat definitions on tap
   ----------------------------------------------------------------------------- */
.wcfb-stats-bottom-sheet {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 200ms ease;
}

.wcfb-stats-bottom-sheet--open {
  opacity: 1;
  pointer-events: auto;
}

.wcfb-stats-bottom-sheet__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
}

.wcfb-stats-bottom-sheet__content {
  position: relative;
  width: 100%;
  max-width: 600px;
  max-height: 80vh;
  background: var(--bg-card-raised, var(--card, #ffffff));
  border-radius: 16px 16px 0 0;
  padding: 20px;
  overflow-y: auto;
  transform: translateY(100%);
  transition: transform 300ms cubic-bezier(0.16, 1, 0.3, 1);
}

.wcfb-stats-bottom-sheet--open .wcfb-stats-bottom-sheet__content {
  transform: translateY(0);
}

.wcfb-stats-bottom-sheet__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}

.wcfb-stats-bottom-sheet__title {
  margin: 0;
  font-size: 18px;
  font-weight: 600;
  color: var(--fg-primary, var(--foreground, #1a1a2e));
}

.wcfb-stats-bottom-sheet__close {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  padding: 0;
  background: transparent;
  border: none;
  border-radius: 8px;
  color: var(--fg-secondary, var(--muted-foreground, #6b7280));
  cursor: pointer;
  transition: background-color 120ms ease, color 120ms ease;
}

.wcfb-stats-bottom-sheet__close:hover {
  background: var(--bg-hover, rgba(0, 0, 0, 0.06));
  color: var(--fg-primary, var(--foreground, #1a1a2e));
}

.wcfb-stats-bottom-sheet__body p {
  margin: 0 0 12px 0;
  font-size: 14px;
  line-height: 1.5;
  color: var(--fg-secondary, var(--muted-foreground, #4b5563));
}

.wcfb-stats-bottom-sheet__definition {
  font-weight: 500;
}

.wcfb-stats-bottom-sheet__formula code {
  display: block;
  padding: 8px 12px;
  background: var(--bg-subtle, var(--muted, #f3f4f6));
  border-radius: 6px;
  font-family: var(--font-mono, "SF Mono", Consolas, monospace);
  font-size: 13px;
  color: var(--fg-primary, var(--foreground, #1a1a2e));
}

.wcfb-stats-bottom-sheet__benchmark {
  font-style: italic;
}

.wcfb-stats-bottom-sheet__link {
  display: inline-flex;
  align-items: center;
  margin-top: 8px;
  color: var(--fg-link, var(--accent-primary, #0066cc));
  text-decoration: none;
  font-weight: 500;
}

.wcfb-stats-bottom-sheet__link:hover {
  text-decoration: underline;
}

/* -----------------------------------------------------------------------------
   POPOVER (Desktop) — Stat definitions on hover/tap
   ----------------------------------------------------------------------------- */
.wcfb-stats-popover {
  position: fixed;
  z-index: 50;
  max-width: 280px;
  padding: 12px;
  background: var(--bg-card-raised, var(--card, #ffffff));
  border: 1px solid var(--stroke-default, rgba(0, 0, 0, 0.12));
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.12);
  font-size: 13px;
  line-height: 1.4;
  animation: wcfb-popover-fade-in 150ms ease;
}

@keyframes wcfb-popover-fade-in {
  from { opacity: 0; transform: translateX(-50%) translateY(-4px); }
  to { opacity: 1; transform: translateX(-50%) translateY(0); }
}

.wcfb-stats-popover__title {
  display: block;
  margin-bottom: 4px;
  font-weight: 600;
  color: var(--fg-primary, var(--foreground, #1a1a2e));
}

.wcfb-stats-popover__definition {
  margin: 0 0 8px 0;
  color: var(--fg-secondary, var(--muted-foreground, #4b5563));
}

.wcfb-stats-popover__formula code {
  display: block;
  padding: 4px 8px;
  margin-bottom: 8px;
  background: var(--bg-subtle, var(--muted, #f3f4f6));
  border-radius: 4px;
  font-family: var(--font-mono, "SF Mono", Consolas, monospace);
  font-size: 11px;
  color: var(--fg-primary, var(--foreground, #1a1a2e));
}

.wcfb-stats-popover__benchmark {
  margin: 0 0 8px 0;
  font-style: italic;
  font-size: 11px;
  color: var(--fg-secondary, var(--muted-foreground, #6b7280));
}

.wcfb-stats-popover__link {
  color: var(--fg-link, var(--accent-primary, #0066cc));
  text-decoration: none;
  font-size: 11px;
}

.wcfb-stats-popover__link:hover {
  text-decoration: underline;
}


/* -----------------------------------------------------------------------------
   PERCENTILE GRID LAYOUT — Multiple bars in grid
   ----------------------------------------------------------------------------- */
.wcfb-percentile-grid {
  display: grid;
  gap: 12px;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

/* -----------------------------------------------------------------------------
   SAMPLE SIZE BADGE — Single confidence indicator (header level)
   ----------------------------------------------------------------------------- */
.wcfb-sample-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  background: var(--bg-subtle, var(--muted, #f8f9fa));
  border-radius: 20px;
  font-size: 13px;
  color: var(--fg-secondary, var(--muted-foreground, #6b7280));
}

.wcfb-sample-badge__icon {
  color: #22c55e;
  font-size: 14px;
}

/* -----------------------------------------------------------------------------
   PERCENTILE CARD — Card-based layout (refined design)
   ----------------------------------------------------------------------------- */
.wcfb-percentile-card {
  background: var(--bg-card-raised, var(--card, #ffffff));
  border: 1px solid var(--stroke-default, rgba(0, 0, 0, 0.12));
  border-radius: 10px;
  padding: 16px;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.wcfb-percentile-card:hover {
  transform: translateY(-1px);
  box-shadow: none;
}


/* Card main section: label, value, rank */
.wcfb-percentile-card__main {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
  gap: 8px;
}

.wcfb-percentile-card__label {
  font-size: 13px;
  font-weight: 500;
  color: var(--fg-secondary, var(--muted-foreground, #6b7280));
  text-transform: none;
  letter-spacing: 0.04em;
  flex-shrink: 0;
}

.wcfb-percentile-card__value {
  font-size: 24px;
  font-weight: 700;
  color: var(--fg-primary, var(--foreground, #1a1a2e));
  font-variant-numeric: tabular-nums lining-nums;
}

.wcfb-percentile-card__rank {
  font-size: 18px;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 6px;
  white-space: nowrap;
}

/* Tier: Elite (75th+ percentile) — Blue */
.wcfb-percentile-card--elite .wcfb-percentile-card__rank {
  background: #dbeafe;
  color: #1d4ed8;
}


.wcfb-percentile-card--elite .wcfb-percentile-card__fill {
  background: linear-gradient(90deg, #1d4ed8 0%, #3b82f6 100%);
}

/* Tier: Good (50-74th percentile) — Green */
.wcfb-percentile-card--good .wcfb-percentile-card__rank {
  background: #dcfce7;
  color: #166534;
}


.wcfb-percentile-card--good .wcfb-percentile-card__fill {
  background: linear-gradient(90deg, #166534 0%, #22c55e 100%);
}

/* Tier: Low (<50th percentile) — Red */
.wcfb-percentile-card--low .wcfb-percentile-card__rank {
  background: #fee2e2;
  color: #dc2626;
}


.wcfb-percentile-card--low .wcfb-percentile-card__fill {
  background: linear-gradient(90deg, #dc2626 0%, #ef4444 100%);
}

/* Card bar section */
.wcfb-percentile-card__bar {
  position: relative;
}

.wcfb-percentile-card__track {
  height: 8px;
  background: var(--stroke-subtle, rgba(0, 0, 0, 0.12));
  border-radius: 4px;
  overflow: hidden;
}

.wcfb-percentile-card__fill {
  height: 100%;
  border-radius: 4px;
  transition: width 0.5s ease-out;
}

.wcfb-percentile-card__markers {
  display: flex;
  justify-content: space-between;
  margin-top: 4px;
  font-size: 10px;
  color: var(--fg-secondary, var(--muted-foreground, #6b7280));
  text-transform: none;
  letter-spacing: 0.04em;
}

/* Mobile: single column */
@media (max-width: 640px) {
  .wcfb-percentile-grid {
    grid-template-columns: 1fr;
  }

  .wcfb-stats-bottom-sheet__content {
    border-radius: 16px;
  }

  .wcfb-percentile-card__main {
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
  }

  .wcfb-percentile-card__value {
    font-size: 20px;
  }

  .wcfb-percentile-card__rank {
    align-self: flex-start;
    font-size: 14px;
  }

  .wcfb-stats-table td {
    padding: 12px 8px;
  }

  .wcfb-stats-table th .wcfb-sort-btn {
    min-height: 48px;
    min-width: 48px;
  }
}

/* Tablet: 2 columns */
@media (min-width: 641px) and (max-width: 1024px) {
  .wcfb-percentile-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* Desktop: 3 columns */
@media (min-width: 1025px) {
  .wcfb-percentile-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}