/* ============================================================
   TYPE FLOW — pages.css
   Page-specific layouts: test, leaderboard, stats, about
   ============================================================ */

/* ============================================================
   1. TEST PAGE
   ============================================================ */

.page--test {
  gap: var(--space-lg);
  max-width: var(--content-wide-max-width);
}

.page--test .page__header {
  max-width: 100%;
  padding: var(--space-sm) 0;
  gap: var(--space-xs);
}

.page--test .page__title {
  font-size: var(--text-2xl);
  font-weight: 600;
  color: var(--text-secondary);
  letter-spacing: var(--tracking-normal);
}

.page--test .page__subtitle {
  font-size: var(--text-sm);
  color: var(--text-muted);
  max-width: 70ch;
}

/* Loading state for the hero (before JS hydrates) */
.page--test .page__title.skeleton,
.page--test .page__subtitle.skeleton {
  max-width: 40ch;
  color: var(--text-dim);
}

/* ============================================================
   2. LEADERBOARD PAGE
   ============================================================ */

.page--leaderboard {
  gap: var(--space-lg);
}

.leaderboard-layout {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: var(--space-lg);
  align-items: start;
}

/* --- Filters sidebar --- */
.leaderboard-filters {
  position: sticky;
  top: var(--space-lg);
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
  padding: var(--space-md);
  background-color: var(--bg-elevated);
  border: var(--border-width) solid var(--border);
  border-radius: var(--radius-lg);
  max-height: calc(100vh - var(--space-2xl));
  overflow-y: auto;
}

.leaderboard-filters .filter-group:last-child {
  margin-bottom: 0;
}

/* --- Main content --- */
.leaderboard-content {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  min-width: 0;
}

.leaderboard-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.leaderboard-title {
  font-family: var(--font-mono);
  font-size: var(--text-lg);
  font-weight: 600;
  letter-spacing: var(--tracking-tight);
  color: var(--text-primary);
  text-transform: lowercase;
}

.leaderboard-meta {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--text-muted);
  letter-spacing: var(--tracking-wide);
}

.leaderboard-meta .skeleton {
  color: var(--text-dim);
  letter-spacing: 0.15em;
}

/* --- Rank medal styles --- */
.leaderboard-table td.col-rank {
  font-family: var(--font-mono);
}

.leaderboard-table tr[data-rank="1"] td.col-rank {
  color: #ffd700;
  font-weight: 700;
}

.leaderboard-table tr[data-rank="2"] td.col-rank {
  color: #c0c0c0;
  font-weight: 700;
}

.leaderboard-table tr[data-rank="3"] td.col-rank {
  color: #cd7f32;
  font-weight: 700;
}

/* --- Rank badge (optional decorative) --- */
.rank-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 24px;
  height: 24px;
  padding: 0 var(--space-xs);
  font-family: var(--font-mono);
  font-size: var(--text-2xs);
  font-weight: 700;
  color: var(--text-muted);
  background-color: var(--surface);
  border-radius: var(--radius-sm);
}

tr[data-rank="1"] .rank-badge {
  color: #ffd700;
  background-color: rgba(255, 215, 0, 0.12);
}

tr[data-rank="2"] .rank-badge {
  color: #c0c0c0;
  background-color: rgba(192, 192, 192, 0.12);
}

tr[data-rank="3"] .rank-badge {
  color: #cd7f32;
  background-color: rgba(205, 127, 50, 0.12);
}

/* ============================================================
   3. STATS PAGE
   ============================================================ */

.page--stats {
  gap: var(--space-xl);
}

/* --- Hero stat cards --- */
.stats-hero {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-md);
}

/* --- Distribution chart --- */
#statsDistributionCard {
  display: flex;
  flex-direction: column;
}

.stats-chart {
  display: flex;
  align-items: flex-end;
  justify-content: space-around;
  gap: 2px;
  height: 220px;
  padding: var(--space-md) 0 var(--space-xs);
  border-bottom: var(--border-width) solid var(--border);
  position: relative;
}

/* Individual bar */
.chart-bar {
  flex: 1;
  max-width: 32px;
  min-width: 4px;
  background: linear-gradient(
    180deg,
    var(--accent) 0%,
    var(--accent) 20%,
    var(--accent-dim) 100%
  );
  border-radius: var(--radius-xs) var(--radius-xs) 0 0;
  position: relative;
  transition: opacity var(--transition-fast);
  animation: bar-grow var(--duration-slow) var(--ease-out) backwards;
  transform-origin: bottom;
}

.chart-bar:hover {
  opacity: 0.85;
}

.chart-bar:hover::after {
  content: attr(data-tooltip);
  position: absolute;
  bottom: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%);
  padding: var(--space-2xs) var(--space-xs);
  background-color: var(--surface);
  border: var(--border-width) solid var(--border-strong);
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: var(--text-2xs);
  color: var(--text-primary);
  white-space: nowrap;
  z-index: var(--z-dropdown);
  pointer-events: none;
}

/* X-axis labels */
.chart-axis {
  display: flex;
  justify-content: space-around;
  gap: 2px;
  padding-top: var(--space-xs);
  font-family: var(--font-mono);
  font-size: var(--text-2xs);
  color: var(--text-muted);
  letter-spacing: 0.05em;
}

.chart-axis span {
  flex: 1;
  max-width: 32px;
  text-align: center;
  transform: rotate(-45deg);
  transform-origin: center;
  white-space: nowrap;
}

/* Y-axis guide lines (optional overlay) */
.chart-guides {
  position: absolute;
  inset: var(--space-md) 0 var(--space-xs) 0;
  pointer-events: none;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.chart-guide {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  font-family: var(--font-mono);
  font-size: var(--text-2xs);
  color: var(--text-dim);
}

.chart-guide::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border);
  opacity: 0.5;
}

/* --- PB grid enhancements --- */
#statsPBCard .pb-grid {
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
}

/* --- Recent list enhancements --- */
#statsRecentCard .recent-item {
  grid-template-columns: 80px 1fr 70px 60px;
}

/* ============================================================
   4. ABOUT PAGE
   ============================================================ */

.page--about {
  max-width: 760px;
  margin-left: 0;
  margin-right: auto;
  gap: var(--space-xl);
}

.about-content {
  display: flex;
  flex-direction: column;
  gap: var(--space-2xl);
}

.about-section {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.about-section__title {
  font-family: var(--font-mono);
  font-size: var(--text-md);
  font-weight: 600;
  letter-spacing: var(--tracking-tight);
  color: var(--accent);
  padding-bottom: var(--space-xs);
  border-bottom: var(--border-width) solid var(--border);
}

.about-section p {
  font-size: var(--text-base);
  line-height: var(--leading-relaxed);
  color: var(--text-secondary);
  max-width: 68ch;
}

.about-section p + p {
  margin-top: var(--space-sm);
}

.about-section a {
  color: var(--accent);
  text-decoration: underline;
  text-decoration-color: transparent;
  text-underline-offset: 3px;
  transition: text-decoration-color var(--transition-fast);
}

.about-section a:hover {
  text-decoration-color: var(--accent);
}

.about-section .kbd {
  margin: 0 2px;
  font-size: var(--text-2xs);
}

/* --- Stats glossary (definition list) --- */
.stats-glossary {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  margin-top: var(--space-xs);
}

.stats-glossary dt {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: var(--tracking-tight);
}

.stats-glossary dd {
  font-size: var(--text-sm);
  line-height: var(--leading-relaxed);
  color: var(--text-secondary);
  margin-left: 0;
  padding-left: var(--space-md);
  border-left: 2px solid var(--border);
  max-width: 68ch;
}

/* ============================================================
   5. RESPONSIVE
   ============================================================ */

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

  .leaderboard-filters {
    position: static;
    max-height: none;
    flex-direction: row;
    flex-wrap: wrap;
    gap: var(--space-md);
  }

  .leaderboard-filters .filter-group {
    flex: 1;
    min-width: 160px;
    margin-bottom: 0;
  }

  .leaderboard-filters .filter-list {
    flex-direction: row;
    flex-wrap: wrap;
    max-height: none;
  }

  .leaderboard-filters .filter-btn {
    flex: 0 0 auto;
    padding: var(--space-2xs) var(--space-sm);
  }

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

  .stats-hero .stat-card:last-child {
    grid-column: 1 / -1;
  }

  .page--about {
    max-width: 100%;
  }
}

@media (max-width: 640px) {
  .page--test .page__title {
    font-size: var(--text-lg);
  }

  .leaderboard-filters {
    padding: var(--space-sm);
  }

  .leaderboard-filters .filter-group {
    min-width: 0;
    flex: 0 0 auto;
  }

  .leaderboard-title {
    font-size: var(--text-base);
  }

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

  .stats-hero .stat-card:last-child {
    grid-column: auto;
  }

  .stat-card__value {
    font-size: var(--text-2xl);
  }

  .chart-bar {
    max-width: 20px;
  }

  .chart-axis span {
    font-size: 9px;
  }

  .about-section__title {
    font-size: var(--text-base);
  }

  .about-section p {
    font-size: var(--text-sm);
  }

  .stats-glossary dd {
    padding-left: var(--space-sm);
    font-size: var(--text-xs);
  }
}

/* ============================================================
   6. KEYFRAMES
   ============================================================ */

@keyframes bar-grow {
  from {
    transform: scaleY(0);
    opacity: 0;
  }
  to {
    transform: scaleY(1);
    opacity: 1;
  }
}

/* ============================================================
   7. REDUCED MOTION
   ============================================================ */

html[data-reduce-motion="true"] .chart-bar {
  animation: none !important;
}

html[data-reduce-motion="true"] .stat-card:hover {
  transform: none !important;
}