/* ──────────────────────────────────────────────────────────────────────────────── */
/* Component Styles                                                                   */
/* ──────────────────────────────────────────────────────────────────────────────── */

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  font-size: 0.875rem;
  font-weight: 500;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background-color var(--transition-fast), color var(--transition-fast);
  text-decoration: none;
  white-space: nowrap;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn.primary {
  background-color: var(--accent);
  color: white;
}

.btn.primary:hover:not(:disabled) {
  background-color: var(--accent-hover);
}

.btn.secondary {
  background-color: var(--bg-tertiary);
  color: var(--text-primary);
}

.btn.secondary:hover:not(:disabled) {
  background-color: var(--text-muted);
}

.btn.small {
  padding: var(--space-xs) var(--space-sm);
  font-size: 0.75rem;
  min-height: 32px;
  min-width: 32px;
}

.btn.large {
  padding: var(--space-md) var(--space-lg);
  font-size: 1rem;
}

/* Cards */
.card {
  background-color: var(--bg-secondary);
  border-radius: var(--radius-lg);
  padding: var(--space-md);
  margin-bottom: var(--space-md);
}

.card-title {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: var(--space-sm);
}

.card-subtitle {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: var(--space-md);
}

/* Form Elements */
input[type="text"],
input[type="number"],
input[type="email"],
input[type="password"],
input[type="url"],
select,
textarea {
  width: 100%;
  padding: var(--space-sm);
  background-color: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 0.875rem;
  transition: border-color var(--transition-fast);
}

input:focus,
select:focus,
textarea:focus {
  outline: none;
  border-color: var(--accent);
}

input::placeholder,
textarea::placeholder {
  color: var(--text-muted);
}

label {
  display: block;
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: var(--space-xs);
}

/* Tables */
.table-container {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
}

thead {
  background-color: var(--bg-tertiary);
}

th {
  padding: var(--space-sm) var(--space-md);
  text-align: left;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  font-size: 0.75rem;
  letter-spacing: 0.05em;
}

td {
  padding: var(--space-sm) var(--space-md);
  border-bottom: 1px solid var(--border);
}

tr:last-child td {
  border-bottom: none;
}

tbody tr:hover {
  background-color: var(--bg-tertiary);
}

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 2px var(--space-sm);
  font-size: 0.75rem;
  font-weight: 500;
  border-radius: var(--radius-sm);
  white-space: nowrap;
}

.badge.success { background-color: rgba(34, 197, 94, 0.2); color: var(--success); }
.badge.warning { background-color: rgba(245, 158, 11, 0.2); color: var(--warning); }
.badge.error { background-color: rgba(239, 68, 68, 0.2); color: var(--error); }
.badge.info { background-color: rgba(59, 130, 246, 0.2); color: var(--accent); }

/* Enriched replay badge (§13.3) */
.enriched-badge {
  display: inline-flex;
  align-items: center;
  padding: 2px var(--space-sm);
  font-size: 0.7rem;
  font-weight: 500;
  border-radius: var(--radius-sm);
  white-space: nowrap;
  background-color: rgba(236, 72, 153, 0.2);
  color: #ec4899;
}

/* Loading Spinner */
.spinner {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 2px solid var(--bg-tertiary);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.loading {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: var(--space-xl);
  color: var(--text-muted);
}

/* Empty State */
.empty-state {
  text-align: center;
  padding: var(--space-xl);
  color: var(--text-muted);
}

.empty-state p {
  margin-bottom: var(--space-md);
}

/* Error State */
.error {
  background-color: rgba(239, 68, 68, 0.1);
  border: 1px solid var(--error);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  color: var(--error);
}

.error p {
  margin-bottom: var(--space-sm);
}

.error .hint {
  font-size: 0.875rem;
  opacity: 0.8;
}

/* Code Block */
.code-block {
  background-color: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  color: var(--text-secondary);
}

pre {
  margin: 0;
}

code {
  font-family: var(--font-mono);
  font-size: 0.875em;
  background-color: var(--bg-tertiary);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
}

/* Page Layout */
.page-title {
  margin-bottom: var(--space-lg);
}

.page-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-lg);
  gap: var(--space-md);
}

.page-header h1 {
  margin-bottom: 0;
}

/* Grid System */
.grid {
  display: grid;
  gap: var(--space-md);
}

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

@media (max-width: 768px) {
  .grid-2, .grid-3, .grid-4 {
    grid-template-columns: 1fr;
  }
}

/* Flex Utilities */
.flex { display: flex; }
.flex-col { flex-direction: column; }
.flex-wrap { flex-wrap: wrap; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.justify-center { justify-content: center; }
.gap-sm { gap: var(--space-sm); }
.gap-md { gap: var(--space-md); }
.gap-lg { gap: var(--space-lg); }

/* Panel */
.panel {
  background-color: var(--bg-secondary);
  border-radius: var(--radius-lg);
  padding: var(--space-md);
}

.panel-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-md);
  font-weight: 600;
  color: var(--text-primary);
}

/* Slider */
.slider-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.slider-group label {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: 0;
}

.slider-group input[type="range"] {
  width: 100%;
  height: 6px;
  padding: 0;
  border: none;
  background: var(--bg-tertiary);
  border-radius: var(--radius-sm);
  appearance: none;
  -webkit-appearance: none;
}

.slider-group input[type="range"]::-webkit-slider-thumb {
  appearance: none;
  -webkit-appearance: none;
  width: 18px;
  height: 18px;
  background: var(--accent);
  border-radius: 50%;
  cursor: pointer;
}

.slider-group input[type="range"]::-moz-range-thumb {
  width: 18px;
  height: 18px;
  background: var(--accent);
  border-radius: 50%;
  cursor: pointer;
  border: none;
}

/* Checkbox */
.checkbox-label {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  cursor: pointer;
  user-select: none;
}

.checkbox-label input[type="checkbox"] {
  width: 18px;
  height: 18px;
  accent-color: var(--accent);
  cursor: pointer;
}

/* Leaderboard Table */
.leaderboard-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
}

.leaderboard-table tbody tr {
  transition: background-color var(--transition-fast);
}

.leaderboard-table tbody tr.rank-1 {
  background-color: rgba(245, 158, 11, 0.1);
}

.leaderboard-table tbody tr.rank-2 {
  background-color: rgba(148, 163, 184, 0.1);
}

.leaderboard-table tbody tr.rank-3 {
  background-color: rgba(180, 83, 9, 0.1);
}

.leaderboard-table .rank {
  font-weight: 600;
  width: 60px;
}

.leaderboard-table .rank-1 .rank { color: var(--warning); }
.leaderboard-table .rank-2 .rank { color: #94a3b8; }
.leaderboard-table .rank-3 .rank { color: #b45309; }

.leaderboard-table .rating {
  text-align: right;
}

.leaderboard-table .rating-value {
  font-weight: 600;
}

.leaderboard-table .rating-dev {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.leaderboard-table .win-rate {
  text-align: right;
}

.leaderboard-table .status {
  text-align: center;
}

.status-healthy { color: var(--success); }
.status-unhealthy { color: var(--error); }
.status-unknown { color: var(--text-muted); }

/* Replay Canvas */
.canvas-wrapper {
  background-color: var(--bg-secondary);
  border-radius: var(--radius-lg);
  padding: var(--space-sm);
  overflow: hidden;
}

.canvas-wrapper canvas {
  display: block;
  width: 100%;
  height: auto;
}

/* Event Log */
.event-log {
  max-height: 200px;
  overflow-y: auto;
  font-size: 0.75rem;
  font-family: var(--font-mono);
}

.event-log .event {
  padding: var(--space-xs) 0;
  border-bottom: 1px solid var(--bg-tertiary);
}

.event-log .event:last-child {
  border-bottom: none;
}

/* Keyboard Shortcuts */
.keyboard-shortcuts {
  font-size: 0.75rem;
  color: var(--text-muted);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.keyboard-shortcuts kbd {
  background-color: var(--bg-tertiary);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
}

/* ─── Skeleton Screens (§16.14) ────────────────────────────────────────────── */

@keyframes skeleton-shimmer {
  0% { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}

.skeleton-bar,
.skeleton-circle,
.skeleton-canvas {
  background: linear-gradient(
    90deg,
    var(--bg-tertiary) 25%,
    var(--border) 37%,
    var(--bg-tertiary) 63%
  );
  background-size: 200% 100%;
  animation: skeleton-shimmer 1.5s ease-in-out infinite;
  border-radius: var(--radius-sm);
}

.skeleton-circle {
  border-radius: 50%;
  flex-shrink: 0;
}

.skeleton-page {
  max-width: 1200px;
  margin: 0 auto;
  opacity: 1;
  transition: opacity 150ms ease;
}

.skeleton-row {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-sm) 0;
}

.skeleton-table-header {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-sm) var(--space-md);
  background: var(--bg-tertiary);
  border-radius: var(--radius-sm) var(--radius-sm) 0 0;
  margin-bottom: 2px;
}

.skeleton-profile-header {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
  padding: var(--space-lg);
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
}

.skeleton-profile-info {
  display: flex;
  flex-direction: column;
}

.skeleton-profile-stats {
  display: flex;
  gap: var(--space-md);
  margin-left: auto;
}

.skeleton-card {
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.skeleton-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: var(--space-lg);
}

@media (max-width: 768px) {
  .skeleton-grid {
    grid-template-columns: 1fr;
  }
  .skeleton-profile-header {
    flex-direction: column;
    text-align: center;
  }
  .skeleton-profile-stats {
    margin-left: 0;
    justify-content: center;
  }
}

/* ─── §16.15 Progressive Disclosure ─────────────────────────────────────────── */

/* Virtual list (leaderboard) */
.virtual-list {
  position: relative;
}

.virtual-list-scroll {
  max-height: 70vh;
  overflow-y: auto;
  outline: none;
}

.virtual-list-scroll:focus-visible {
  box-shadow: inset 0 0 0 2px var(--accent);
}

.virtual-list-rows {
  position: relative;
}

.virtual-list-row {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-sm) var(--space-md);
  border-bottom: 1px solid var(--border);
  cursor: pointer;
  transition: background-color var(--transition-fast);
  min-height: 48px;
  box-sizing: border-box;
}

.virtual-list-row:hover {
  background-color: var(--bg-tertiary);
}

.virtual-list-row:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: -2px;
}

.virtual-list-row.expanded {
  background-color: var(--bg-secondary);
}

.virtual-list-expanded {
  padding: var(--space-sm) 0 var(--space-md);
  animation: expand-in 200ms ease-out;
}

.virtual-list-show-more {
  display: block;
  margin: var(--space-md) auto;
  min-width: 200px;
}

/* Leaderboard row (desktop — both virtual and static) */
.lb-row {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-sm) var(--space-md);
  border-bottom: 1px solid var(--border);
  cursor: pointer;
  transition: background-color var(--transition-fast);
  min-height: 48px;
  box-sizing: border-box;
}

.lb-row:hover {
  background-color: var(--bg-tertiary);
}

.lb-row.row-expanded {
  background-color: var(--bg-secondary);
}

.lb-rank {
  font-weight: 600;
  width: 40px;
  flex-shrink: 0;
}

.lb-row.rank-1 .lb-rank { color: var(--warning); }
.lb-row.rank-2 .lb-rank { color: #94a3b8; }
.lb-row.rank-3 .lb-rank { color: #b45309; }

.lb-row.rank-1 { background-color: rgba(245, 158, 11, 0.05); }
.lb-row.rank-2 { background-color: rgba(148, 163, 184, 0.05); }
.lb-row.rank-3 { background-color: rgba(180, 83, 9, 0.05); }

.lb-name {
  flex: 1;
  min-width: 120px;
}

.lb-name a {
  color: var(--text-primary);
  text-decoration: none;
}

.lb-name a:hover {
  text-decoration: underline;
}

.lb-rating {
  width: 100px;
  text-align: right;
}

.lb-rating .rating-value {
  font-weight: 600;
}

.lb-rating .rating-dev {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-left: 4px;
}

.lb-wl {
  width: 60px;
  text-align: center;
}

.lb-winrate {
  width: 70px;
  text-align: right;
}

.lb-status {
  width: 80px;
  text-align: center;
  font-size: 0.8rem;
}

.lb-expand-icon {
  width: 20px;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.75rem;
  transition: transform var(--transition-fast);
}

.lb-expanded {
  padding: var(--space-sm) var(--space-md) var(--space-md);
  animation: expand-in 200ms ease-out;
}

.lb-expanded-stats {
  display: flex;
  gap: var(--space-lg);
  margin-bottom: var(--space-sm);
  flex-wrap: wrap;
}

.lb-stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  min-width: 60px;
}

.lb-stat-val {
  font-weight: 600;
  font-size: 1.1rem;
}

.lb-stat-label {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.lb-profile-link {
  display: inline-block;
  margin-top: var(--space-xs);
}

.lb-hint {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: var(--space-sm);
}

/* Expand/collapse animation */
@keyframes expand-in {
  from {
    opacity: 0;
    max-height: 0;
  }
  to {
    opacity: 1;
    max-height: 200px;
  }
}

/* Expandable section (profile page) */
.expandable-section {
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.section-toggle {
  display: flex;
  width: 100%;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-md);
  background: none;
  border: none;
  color: var(--text-primary);
  cursor: pointer;
  font-size: 1rem;
  text-align: left;
  transition: background-color var(--transition-fast);
}

.section-toggle:hover {
  background-color: var(--bg-tertiary);
}

.section-toggle:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: -2px;
}

.section-toggle h2 {
  margin: 0;
  font-size: 1rem;
}

.section-toggle-icon {
  color: var(--text-muted);
  font-size: 0.75rem;
  transition: transform var(--transition-fast);
}

.section-content {
  max-height: 0;
  overflow: hidden;
  transition: max-height 250ms ease-out, padding 250ms ease-out;
  padding: 0 var(--space-md);
}

.section-content.expanded {
  max-height: 600px;
  padding: var(--space-md);
}

/* Match card expand/collapse */
.match-card-toggle {
  display: block;
  width: 100%;
  background: none;
  border: none;
  color: inherit;
  cursor: pointer;
  text-align: left;
  padding: 0;
}

.match-card-toggle:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

.match-card-details {
  max-height: 0;
  overflow: hidden;
  transition: max-height 200ms ease-out;
  padding: 0 var(--space-md);
}

.match-card-details.expanded {
  max-height: 100px;
  padding: var(--space-sm) var(--space-md) var(--space-md);
}

.match-expand-icon {
  color: var(--text-muted);
  font-size: 0.75rem;
  transition: transform var(--transition-fast);
}

/* Mobile card expand (leaderboard) */
.mobile-card-toggle {
  display: flex;
  width: 100%;
  align-items: center;
  background: none;
  border: none;
  color: inherit;
  cursor: pointer;
  text-align: left;
  padding: 0;
}

.mobile-card-toggle:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

.mobile-card-arrow {
  color: var(--text-muted);
  font-size: 0.75rem;
  margin-left: auto;
  padding-right: var(--space-sm);
  transition: transform var(--transition-fast);
}

/* "Show more" button (generic) */
.show-more-btn {
  display: block;
  margin: var(--space-md) auto;
  min-width: 200px;
}

.show-more-btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* Lazy section placeholder */
.lazy-placeholder {
  background: linear-gradient(
    90deg,
    var(--bg-tertiary) 25%,
    var(--border) 37%,
    var(--bg-tertiary) 63%
  );
  background-size: 200% 100%;
  animation: skeleton-shimmer 1.5s ease-in-out infinite;
  border-radius: var(--radius-sm);
}

.lazy-section-revealed {
  animation: expand-in 200ms ease-out;
}

/* ─── Reduced Motion ────────────────────────────────────────────────────────── */
/* §16.15: all expand/collapse transitions become instant when the user prefers
   reduced motion.  Prevents animation sickness for vestibular disorders. */

@media (prefers-reduced-motion: reduce) {
  .section-content {
    transition: none;
  }

  .match-card-details {
    transition: none;
  }

  .virtual-list-expanded,
  .lb-expanded,
  .lazy-section-revealed {
    animation: none;
  }

  @keyframes expand-in {
    from { opacity: 1; max-height: none; }
    to { opacity: 1; max-height: none; }
  }

  .lb-expand-icon,
  .section-toggle-icon,
  .match-expand-icon,
  .mobile-card-arrow {
    transition: none;
  }

  .leaderboard-mobile-details {
    transition: none;
  }
}

/* ─── Mobile responsive for progressive disclosure ──────────────────────────── */

@media (max-width: 768px) {
  .virtual-list-scroll {
    max-height: none; /* Let it flow naturally on mobile */
  }

  .lb-expanded-stats {
    gap: var(--space-md);
  }

  .lb-row {
    gap: var(--space-sm);
    padding: var(--space-sm);
  }

  .lb-wl,
  .lb-status {
    display: none; /* Hidden on narrow screens, available in expanded */
  }

  .section-content.expanded {
    max-height: 1000px;
  }
}