/* ==========================================================================
   GAMES HUB STYLES
   Dedicated stylesheet for Games/Puzzle mode pages
   ========================================================================== */

/* ==========================================================================
   0. GAMES HUB - MAIN CONTAINER
   ========================================================================== */

.games-container {
  padding-top: var(--space-6);
  padding-bottom: var(--space-10);
  position: relative;
  max-width: 900px;
  margin: 0 auto;
}

/* ==========================================================================
   1. GAMES HUB - STATS BAR
   ========================================================================== */

.games-stats-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-8);
  padding: var(--space-3) var(--space-4);
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  margin-bottom: var(--space-6);
  transition: var(--transition-base);
}

.games-stats-bar:hover {
  background: var(--admin-hover-bg);
  transform: translateY(-2px);
}

.gstat-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: 0.9rem;
  font-weight: var(--fw-medium);
  color: var(--text-main);
}

.gstat-item .lucide {
  width: 1.25rem;
  height: 1.25rem;
  color: var(--primary);
}

.games-stats-guest {
  justify-content: center;
}

.gstat-login-prompt {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--accent-secondary);
  font-size: var(--fs-sm);
  font-weight: var(--fw-bold);
  text-decoration: none;
  transition: color var(--transition-base);
}

.gstat-login-prompt .lucide {
  width: 18px;
  height: 18px;
}

.gstat-login-prompt:hover {
  color: var(--text-main);
}

/* ==========================================================================
   2. CATEGORY FILTER TABS
   ========================================================================== */

/* Outer: sticky positioning, border, background, border-radius */
.games-filter-tabs-outer {
  background: var(--glass-bg);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  margin-bottom: var(--space-8);
  overflow: hidden;
  position: sticky;
  top: 70px;
  z-index: 90;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: box-shadow 0.2s ease;
}

.games-filter-tabs-outer.is-stuck {
  box-shadow: var(--shadow-md);
  border-radius: var(--radius-md);
}

/* Inner: flex layout + horizontal scroll */
.games-filter-tabs {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2);
  overflow-x: auto;
  scrollbar-width: thin;
  scrollbar-color: rgba(156, 163, 175, 0.3) transparent;
  justify-content: center;
}

.games-filter-tabs::-webkit-scrollbar { height: 3px; }
.games-filter-tabs::-webkit-scrollbar-track { background: transparent; }
.games-filter-tabs::-webkit-scrollbar-thumb { background: rgba(156, 163, 175, 0.3); border-radius: 3px; }
.games-filter-tabs::-webkit-scrollbar-thumb:hover { background: rgba(156, 163, 175, 0.5); }

.games-filter-tab {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.6rem var(--space-4);
  border: 1px solid var(--border-subtle);
  background: var(--admin-hover-bg);
  color: var(--text-secondary);
  flex-shrink: 0;
  font-size: 0.85rem;
  font-weight: var(--fw-medium);
  border-radius: var(--radius-lg);
  white-space: nowrap;
  justify-content: center;
  box-shadow: var(--shadow-sm);
}

.games-filter-tab .lucide {
  width: 1rem;
  height: 1rem;
}

.games-filter-tab:hover {
  background: var(--admin-active-bg);
  color: var(--accent-primary);
  border-color: rgba(59, 130, 246, 0.6);
}

.games-filter-tab.active {
  background: var(--accent-gradient);
  color: #ffffff;
  border: none;

}

/* ==========================================================================
   3. GAMES GRID
   ========================================================================== */

.games-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: var(--space-5);
  margin-bottom: var(--space-12);
}

/* --- Game Card Base --- */
.game-card {
  display: flex;
  align-items: flex-start;
  gap: var(--space-4);
  padding: 1.5rem;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  text-decoration: none;
  color: inherit;
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

/* --- Game Card Icon Base --- */
.game-card-icon {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  background: var(--admin-hover-bg);
  border-radius: var(--radius-lg);
  color: var(--text-main);
}

.game-card-icon .lucide {
  width: 28px;
  height: 28px;
  stroke-width: 2px;
}

/* --- Content Layout --- */
.game-card-content {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.game-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
  margin-bottom: 2px;
}

.game-card-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-main);
  margin: 0;
  line-height: 1.3;
}

.game-card-desc {
  font-size: 0.85rem;
  color: var(--text-soft);
  margin: 0;
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.game-card-meta {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-top: auto;
  padding-top: 8px;
}

/* --- Badges & Tags --- */
.game-premium-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 8px;
  background: var(--accent-gradient);
  color: #ffffff;
  font-size: 10px;
  font-weight: 800;
  border-radius: 6px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.game-premium-badge .lucide {
  width: 10px;
  height: 10px;
  stroke-width: 3px;
}

.game-free-badge {
  display: inline-flex;
  padding: 3px 8px;
  background: rgba(16, 185, 129, 0.1);
  color: var(--success);
  font-size: 10px;
  font-weight: 700;
  border-radius: 6px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.game-category-tag {
  display: inline-flex;
  padding: 4px 10px;
  background: var(--admin-hover-bg);
  color: var(--text-secondary);
  font-size: 0.75rem;
  font-weight: var(--fw-medium);
  border: 1px solid var(--border-subtle);
  border-radius: 6px;
  text-transform: capitalize;
  transition: all var(--transition-fast);
}

.game-card-arrow {
  position: absolute;
  bottom: 24px;
  right: 24px;
  color: var(--text-muted);
  opacity: 0;
  transform: translateX(-10px);
  transition: all var(--transition-fast);
}

/* --- HOVER EFFECTS (Standard) --- */
.game-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-sm);
}

.game-card:hover .game-card-icon {
  background: var(--accent-gradient);
  color: #ffffff;
  transform: scale(1.05);
  box-shadow: var(--shadow-sm);
}

.game-card:hover .game-category-tag {
  background: var(--hover-bg);
  color: var(--text-main);
}

.game-card:hover .game-card-arrow {
  opacity: 1;
  transform: translateX(0);
  color: var(--primary);
}

/* Empty State */
.games-empty {
  grid-column: 1 / -1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-16) var(--space-8);
  text-align: center;
  color: var(--text-muted);
}

.games-empty .lucide {
  width: 4rem;
  height: 4rem;
  margin-bottom: var(--space-4);
  opacity: 0.5;
}

.games-empty h3 {
  font-size: 1.25rem;
  color: var(--text-secondary);
  margin: 0 0 var(--space-2) 0;
}

.games-empty p {
  margin: 0;
  font-size: 0.9rem;
}

/* ==========================================================================
   4. BENEFITS SECTION
   ========================================================================== */

.games-benefits {
  padding: var(--space-8) 0 var(--space-12);
}

.benefits-title {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  font-size: 1.5rem;
  font-weight: var(--fw-bold);
  color: var(--text-main);
  margin: 0 0 var(--space-8) 0;
  text-align: center;
}

.benefits-title .lucide {
  color: var(--warning);
}

.benefits-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--space-6);
}

.benefit-card {
  padding: var(--space-6);
  background: var(--card-bg);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  text-align: center;
  transition: var(--transition-base);
}

.benefit-card:hover {
  border-color: rgba(59, 130, 246, 0.3);
  box-shadow: var(--shadow-sm);
  background: var(--admin-hover-bg);
  transform: translateY(-2px);
}

.benefit-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  font-size: 1.5rem;
  margin-bottom: var(--space-4);
}

.benefit-icon.icon-blue {
  background: var(--color-info-bg);
  color: var(--color-info);
}

.benefit-icon.icon-green {
  background: var(--color-success-bg);
  color: var(--color-success);
}

.benefit-icon.icon-orange {
  background: var(--color-warning-bg);
  color: var(--accent-secondary);
}

.benefit-icon.icon-purple {
  background: var(--color-purple-bg);
  color: var(--color-purple);
}

.benefit-card h3 {
  font-size: 1rem;
  font-weight: var(--fw-semibold);
  color: var(--text-main);
  margin: 0 0 0.5rem 0;
}

.benefit-card p {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin: 0;
  line-height: 1.5;
}

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

@media (max-width: 768px) {
  .games-stats-bar {
    flex-wrap: wrap;
    gap: var(--space-4);
    padding: var(--space-4);
  }

  .gstat-item {
    font-size: 0.8rem;
  }

  .games-filter-tabs-outer {
    top: 67px;
  }

  .games-filter-tabs {
    justify-content: flex-start;
  }

  .games-filter-tab {
    padding: 0.5rem 0.75rem;
    font-size: 0.8rem;
  }

  .games-grid {
    grid-template-columns: 1fr;
    gap: 0.75rem;
  }

  .game-card {
    padding: var(--space-4);
  }

  .game-card-icon {
    width: 48px;
    height: 48px;
    font-size: 1.25rem;
  }

  .benefits-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-4);
  }

  .benefit-card {
    padding: var(--space-4);
  }

  .benefit-icon {
    width: 40px;
    height: 40px;
    font-size: 1.25rem;
  }
}

@media (max-width: 480px) {
  .gstat-login-prompt span {
    font-size: var(--fs-sm);
  }

  .benefits-grid {
    grid-template-columns: 1fr;
  }
}

/* ==========================================================================
   6. PREMIUM REQUIRED PAGE
   ========================================================================== */

.premium-required-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 50vh;
  padding: var(--space-8);
  text-align: center;
}

.premium-icon {
  color: var(--color-warning);
  margin-bottom: var(--space-4);
  width: 40px;
  height: 40px;
}

.premium-required-container h1 {
  font-size: 1.75rem;
  font-weight: var(--fw-bold);
  color: var(--text-main);
  margin: 0 0 0.75rem 0;
}

.premium-required-container p {
  font-size: 1rem;
  color: var(--text-muted);
  margin: 0 0 2rem 0;
  max-width: 400px;
}

.premium-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  justify-content: center;
}

.btn-premium {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  background: linear-gradient(135deg, #ffd700, #ffb700);
  color: #1a1a1a;
  font-weight: 600;
  border: none;
  border-radius: var(--radius-lg);
  text-decoration: none;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.btn-premium:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 20px rgba(255, 215, 0, 0.4);
}

.btn-back-games {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  background: var(--bg-card);
  color: var(--text-main);
  font-weight: var(--fw-medium);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  transition: var(--transition-base);
}

.btn-back-games:hover {
  border-color: rgba(59, 130, 246, 0.3);
  box-shadow: var(--shadow-sm);
  background: var(--admin-hover-bg);
  transform: translateY(-2px);
}

/* ==========================================================================
   7. INDIVIDUAL GAME PAGE STYLES
   ========================================================================== */

.game-container {
  padding-bottom: var(--space-10);
}

.game-page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  margin-top: var(--space-6);
  margin-bottom: var(--space-6);
  flex-wrap: wrap;
}

.game-page-header h1 {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 1.5rem;
  font-weight: var(--fw-bold);
  color: var(--text-main);
  margin: 0;
}

.game-page-header h1 .lucide {
  width: 1.75rem;
  height: 1.75rem;
  color: var(--primary);
}

.game-difficulty-select {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.difficulty-btn {
  padding: var(--space-2) var(--space-4);
  border: 1px solid var(--border-subtle);
  background: var(--bg-card);
  color: var(--text-main);
  font-size: 0.85rem;
  font-weight: var(--fw-medium);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.difficulty-btn:hover {
  border-color: rgba(59, 130, 246, 0.3);
  box-shadow: var(--shadow-sm);
  background: var(--admin-hover-bg);
  transform: translateY(-2px);
}

.difficulty-btn.active {
  border-color: rgba(59, 130, 246, 0.3);
  box-shadow: var(--shadow-sm);
  background: var(--admin-hover-bg);
  color: var(--accent-secondary);
  font-weight: var(--fw-semibold);
}

.game-controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-4);
  flex-wrap: wrap;
}

.game-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  background: var(--bg-card);
  color: var(--text-main);
  font-size: var(--fs-md);
  font-weight: var(--fw-semibold);
  cursor: pointer;
  transition: var(--transition-base);
}

.game-btn:hover {
  border-color: rgba(59, 130, 246, 0.3);
  box-shadow: var(--shadow-sm);
  background: var(--admin-hover-bg);
  transform: translateY(-2px);
}

.game-btn-primary {
  background: var(--bg-card);
}

.game-btn-secondary {
  background: var(--bg-card);
}

.game-timer {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  border-radius: var(--radius-md);
  font-size: var(--fs-md);
  font-weight: var(--fw-semibold);
  color: var(--text-main);
}

.game-timer .lucide {
  color: var(--primary);
}

/* Timer type badge — shown after the timer pill */
.game-status-bar .game-timer::after {
  font-size: 10px;
  font-weight: var(--fw-semibold);
  letter-spacing: 0.04em;
  padding: 2px 7px;
  border-radius: var(--radius-full);
  line-height: 1.4;
  white-space: nowrap;
  margin-left: 2px;
}
/* Countdown games (have .qc-progress-bar anywhere in .game-board-section) */
.game-board-section:has(.qc-progress-bar) .game-timer::after {
  content: "TIMED";
  background: color-mix(in srgb, var(--error) 12%, transparent);
  color: var(--error);
}
/* Puzzle / count-up games (no .qc-progress-bar in .game-board-section) */
.game-board-section:not(:has(.qc-progress-bar)) .game-timer::after {
  content: "PUZZLE";
  background: color-mix(in srgb, var(--primary) 12%, transparent);
  color: var(--primary);
}

/* ==========================================================================
   8. SUDOKU GAME STYLES
   ========================================================================== */

.game-layout-grid {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: var(--space-10);
  align-items: start;
}

/* Board Container */
.game-board-section {
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 100%;
  margin-bottom: var(--space-6);
}
.game-board-section > .game-btn {
  margin-top: var(--space-4);
}

.game-status-bar {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--space-3);
  width: 100%;
  margin-bottom: 1rem;
}

.game-timer, .game-mistakes, .game-moves {
  font-weight: var(--fw-semibold);
  color: var(--text-soft);
  padding: var(--space-2) var(--space-5);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-full);
  background: var(--admin-hover-bg);
  box-shadow: var(--shadow-sm);
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: 0.9rem;
}

.game-mistakes span {
  color: var(--color-error);
}

/* The Grid */
.sudoku-board {
  display: grid;
  grid-template-columns: repeat(9, 1fr);
  grid-template-rows: repeat(9, 1fr);
  gap: 0;
  background: var(--bg-card);
  border: 4px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  width: 100%;
  max-width: 620px;
  aspect-ratio: 1;
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  margin-bottom: var(--space-6);
}

.loading-board {
  grid-column: 1 / -1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  gap: var(--space-4);
  color: var(--text-muted);
  font-size: 1.1rem;
}

.sudoku-cell {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  font-weight: var(--fw-medium);
  color: var(--accent-secondary);
  cursor: pointer;
  border-right: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
  user-select: none;
  transition: background-color 0.1s;
}

/* Thicker Borders for 3x3 subgrids */
.sudoku-cell:nth-child(3n) {
  border-right: 4px solid var(--border-subtle);
}
.sudoku-cell:nth-child(9n) {
  border-right: none;
}
.sudoku-cell:nth-child(n+19):nth-child(-n+27),
.sudoku-cell:nth-child(n+46):nth-child(-n+54) {
  border-bottom: 4px solid var(--border-subtle);
}
/* Remove bottom border for last row */
.sudoku-cell:nth-child(n+73) {
  border-bottom: none;
}

/* Cell States */
.sudoku-cell.fixed {
  background: var(--bg-section-soft);
  color: var(--text-main);
  font-weight: var(--fw-bold);
  cursor: default;
}

.sudoku-cell:hover:not(.fixed) {
  background: var(--admin-hover-bg);
}

.sudoku-cell.selected {
  background: var(--accent-primary) !important;
  color: white !important;
}

.sudoku-cell.highlight {
  background: var(--admin-hover-bg);
}

.sudoku-cell.same-num {
  background: var(--color-info-bg);
}

.sudoku-cell.error {
  background: var(--color-error-bg) !important;
  color: var(--color-error) !important;
  animation: shake 0.3s ease-in-out;
}

/* Note Mode Styles */
.sudoku-cell.has-notes {
  display: grid !important;
  grid-template-columns: repeat(3, 1fr);
  grid-template-rows: repeat(3, 1fr);
  align-items: center;
  justify-items: center;
  font-size: 0.65rem;
  color: var(--text-soft);
  padding: 1px;
  line-height: 1;
}

.note-num {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: var(--fw-bold);
  color: var(--text-muted);
}
.note-num.active {
  color: var(--text-main);
  background: transparent;
}

/* Active State for Action Buttons */
.game-btn.active {
  background: var(--accent-primary) !important;
  color: white !important;
  border-color: var(--accent-primary) !important;
  box-shadow: inset 0 2px 4px rgba(0,0,0,0.2);
}

/* Controls (Undo, Erase, Hint) */
.game-controls-mobile {
  display: flex;
  gap: var(--space-4);
  margin-bottom: var(--space-6);
  width: 100%;
  max-width: 450px;
  justify-content: center;
}

.game-controls-mobile .game-btn-secondary {
  flex: 1;
  justify-content: center;
  background: var(--bg-card);
  color: var(--text-main);
  box-shadow: var(--shadow-sm);
}

.game-controls-mobile .game-btn-secondary:hover {
  transform: translateY(-2px);
  border-color: rgba(59, 130, 246, 0.3);
  box-shadow: var(--shadow-sm);
  background: var(--admin-hover-bg);
}

/* Numpad */
.game-numpad {
  display: flex;
  justify-content: space-between;
  width: 100%;
  max-width: 450px;
  gap: var(--space-2);
}

.numpad-btn {
  flex: 1;
  aspect-ratio: 1;
  border: none;
  background: var(--bg-card);
  color: var(--text-main);
  font-size: 1.5rem;
  font-weight: var(--fw-semibold);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  cursor: pointer;
  transition: var(--transition-base);
  display: flex;
  align-items: center;
  justify-content: center;
}

.numpad-btn:hover {
  transform: translateY(-2px);
  border-color: rgba(59, 130, 246, 0.3);
  box-shadow: var(--shadow-sm);
  background: var(--admin-hover-bg);
}

.numpad-btn:active {
  transform: translateY(-1px);
  background: var(--admin-hover-bg);
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-5px); }
  75% { transform: translateX(5px); }
}

/* Pause Overlay */
.sudoku-board.board-paused {
  filter: blur(8px);
  pointer-events: none;
  user-select: none;
}

/* Correct Cell Pop Animation */
.sudoku-cell.correct-pop {
  animation: correctPop 0.3s ease-out;
}
@keyframes correctPop {
  0% { transform: scale(0.8); opacity: 0.5; }
  50% { transform: scale(1.15); }
  100% { transform: scale(1); opacity: 1; }
}

/* Win Celebration Wave */
.sudoku-board.board-complete .sudoku-cell {
  animation: cellCelebrate 0.5s ease-out forwards;
  animation-delay: calc(var(--cell-index) * 20ms);
}
@keyframes cellCelebrate {
  0% { background: var(--bg-card); }
  50% { background: var(--color-success-bg); transform: scale(1.05); }
  100% { background: var(--bg-card); }
}

/* Numpad Completed Number */
.numpad-btn.completed {
  opacity: 0.3;
  pointer-events: none;
}

.game-moves span {
  color: var(--accent-primary);
}

/* Hint Count Badge */
#btn-hint #hint-count {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--accent-primary);
  color: white;
  font-size: 0.7rem;
  font-weight: var(--fw-bold);
  margin-left: 2px;
}

#btn-hint.disabled {
  opacity: 0.4;
  pointer-events: none;
}

/* Game Modal */
.game-modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-4);
  backdrop-filter: blur(4px);
}

.game-modal {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  max-width: 420px;
  width: 100%;
  text-align: center;
  box-shadow: var(--shadow-lg);
  animation: modalIn 0.3s ease-out;
}

@keyframes modalIn {
  from { opacity: 0; transform: scale(0.9) translateY(10px); }
  to { opacity: 1; transform: scale(1) translateY(0); }
}

.game-modal-icon {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--space-4);
}

.game-modal-icon.icon-win {
  background: var(--color-success-bg);
  color: var(--color-success);
}

.game-modal-icon.icon-lose {
  background: var(--color-error-bg);
  color: var(--color-error);
}

.game-modal-icon.icon-pause {
  background: var(--color-info-bg);
  color: var(--color-info);
}

.game-modal h2 {
  font-size: 1.5rem;
  font-weight: var(--fw-bold);
  color: var(--text-main);
  margin: 0 0 var(--space-2) 0;
}

.game-modal p {
  color: var(--text-soft);
  margin: 0 0 var(--space-6) 0;
  font-size: 0.95rem;
}

.game-modal-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-3);
  margin-bottom: var(--space-6);
}

.modal-stat {
  background: var(--bg-section-soft);
  border-radius: var(--radius-md);
  padding: var(--space-3);
}

.modal-stat-label {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.modal-stat-value {
  font-size: 1.25rem;
  font-weight: var(--fw-bold);
  color: var(--text-main);
  margin-top: 2px;
}

.game-modal-actions {
  display: flex;
  gap: var(--space-3);
  justify-content: center;
}

.game-modal-actions .game-btn {
  flex: 1;
  max-width: 160px;
}



/* Responsive */
@media (max-width: 900px) {
  .game-layout-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  
  .game-board-section {
    order: 1;
  }

  .game-sidebar {
    order: 2;
    max-width: 450px;
    margin: 0 auto;
    width: 100%;
  }
}

@media (max-width: 480px) {
  .game-page-header {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-3);
  }

  .game-difficulty-select {
    width: 100%;
    justify-content: flex-start;
    flex-wrap: wrap;
  }

  .difficulty-btn {
    padding: var(--space-1) var(--space-3);
    font-size: 0.8rem;
  }

  .game-numpad {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 0.5rem;
  }

  .game-controls-mobile {
    gap: 0.35rem;
    flex-wrap: wrap;
    justify-content: center;
  }

  .game-controls-mobile .game-btn-secondary {
    font-size: 0.75rem;
    padding: var(--space-2) var(--space-2);
  }

  .numpad-btn {
    font-size: 1.25rem;
  }

  .game-status-bar {
    gap: var(--space-2);
  }

  .game-timer, .game-mistakes, .game-moves {
    padding: var(--space-1) var(--space-3);
    font-size: 0.8rem;
  }
}

/* ==========================================================================
   9. SIDEBAR & GAME INFO
   ========================================================================== */

.game-sidebar {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.sidebar-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-base);
}

.sidebar-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: rgba(59, 130, 246, 0.3);
}

.sidebar-card h3 {
  font-size: 1.1rem;
  font-weight: var(--fw-bold);
  color: var(--text-main);
  margin: 0 0 var(--space-4) 0;
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding-bottom: var(--space-3);
  border-bottom: 1px solid var(--border-subtle);
}

/* Stats Styling */
.stat-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-3) 0;
  font-size: 0.95rem;
  border-bottom: 1px dashed var(--border-subtle);
}

.stat-row:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.stat-label {
  color: var(--text-soft);
  text-transform: capitalize;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.stat-val {
  font-weight: var(--fw-bold);
  color: var(--accent-secondary);
  font-family: var(--font-main);
}

.stat-empty {
  text-align: center;
  color: var(--text-muted);
  padding: var(--space-2) 0;
  font-style: italic;
  font-size: 0.9rem;
}

.stat-login-link {
  color: var(--color-primary);
  font-style: normal;
  font-weight: 600;
  text-decoration: none;
}

.stat-login-link:hover {
  text-decoration: underline;
}

/* Rules List */
.rules-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.rules-list li {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  margin-bottom: var(--space-3);
  color: var(--text-soft);
  font-size: 0.9rem;
  line-height: 1.5;
}

.rules-list li:last-child {
  margin-bottom: 0;
}

.rules-list li .lucide {
  color: var(--success);
  font-size: 1.1rem;
  flex-shrink: 0;
  margin-top: 0.1rem;
}

.game-sidebar-actions {
  display: flex;
  gap: var(--space-3);
  flex-wrap: wrap;
}

.game-sidebar-actions .game-btn {
  flex: 1 1 0;
  min-width: 120px;
  justify-content: center;
  margin-top: 0;
}

/* Sidebar Ad specific layout to prevent AdSense from collapsing on mobile */
.game-sidebar .ad-sidebar {
  margin-top: var(--space-6);
  width: 100%;
  min-height: 280px; /* Safe space for 300x250 ad */
  display: flex;
  flex-direction: column;
  align-items: center;
}


/* ==========================================================================
   10. 2048 GAME
   ========================================================================== */

.board-2048 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  padding: 12px;
  background: var(--bg-section-soft);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  width: 100%;
  max-width: 450px;
  aspect-ratio: 1;
  box-shadow: var(--shadow-sm);
  margin-bottom: var(--space-6);
}

.tile-2048 {
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  font-size: 2rem;
  font-weight: var(--fw-bold);
  background: var(--admin-hover-bg);
  color: transparent;
  transition: transform 0.1s ease;
  user-select: none;
  aspect-ratio: 1;
}

/* Tile Colors by Value */
.tile-2048[data-value="2"] {
  background: #eee4da;
  color: #776e65;
}
.tile-2048[data-value="4"] {
  background: #ede0c8;
  color: #776e65;
}
.tile-2048[data-value="8"] {
  background: #f2b179;
  color: #ffffff;
}
.tile-2048[data-value="16"] {
  background: #f59563;
  color: #ffffff;
}
.tile-2048[data-value="32"] {
  background: #f67c5f;
  color: #ffffff;
}
.tile-2048[data-value="64"] {
  background: #f65e3b;
  color: #ffffff;
}
.tile-2048[data-value="128"] {
  background: #edcf72;
  color: #ffffff;
  font-size: 1.75rem;
}
.tile-2048[data-value="256"] {
  background: #edcc61;
  color: #ffffff;
  font-size: 1.75rem;
}
.tile-2048[data-value="512"] {
  background: #edc850;
  color: #ffffff;
  font-size: 1.75rem;
}
.tile-2048[data-value="1024"] {
  background: #edc53f;
  color: #ffffff;
  font-size: 1.4rem;
}
.tile-2048[data-value="2048"] {
  background: #edc22e;
  color: #ffffff;
  font-size: 1.4rem;
  box-shadow: 0 0 20px rgba(237, 194, 46, 0.5);
}

/* Values beyond 2048 */
.tile-2048[data-value="4096"],
.tile-2048[data-value="8192"] {
  background: #3c3a32;
  color: #ffffff;
  font-size: 1.2rem;
}

/* New tile pop-in */
.tile-2048.tile-new {
  animation: tilePopIn 0.2s ease-out;
}

@keyframes tilePopIn {
  0% { transform: scale(0); opacity: 0; }
  100% { transform: scale(1); opacity: 1; }
}



/* Mobile Arrow Controls */
.controls-2048 {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  width: 100%;
  max-width: 200px;
  margin: 0 auto;
}

.ctrl-2048-row {
  display: flex;
  gap: var(--space-2);
}

.ctrl-2048-btn {
  width: 56px;
  height: 56px;
  border: 1px solid var(--border-subtle);
  background: var(--bg-card);
  color: var(--text-main);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition-base);
}

.ctrl-2048-btn:hover {
  transform: translateY(-2px);
  border-color: rgba(59, 130, 246, 0.3);
  background: var(--admin-hover-bg);
}

.ctrl-2048-btn:active {
  transform: translateY(0);
  background: var(--admin-hover-bg);
}

/* Hide mobile arrows on desktop (keyboard available) */
@media (min-width: 769px) {
  .controls-2048 {
    display: none;
  }
}

@media (max-width: 480px) {
  .board-2048 {
    gap: 8px;
    padding: 8px;
  }

  .tile-2048 {
    font-size: 1.4rem;
  }

  .tile-2048[data-value="128"],
  .tile-2048[data-value="256"],
  .tile-2048[data-value="512"] {
    font-size: 1.2rem;
  }

  .tile-2048[data-value="1024"],
  .tile-2048[data-value="2048"] {
    font-size: 1rem;
  }

  .ctrl-2048-btn {
    width: 48px;
    height: 48px;
  }
}

/* ==========================================================================
   11. MINESWEEPER
   ========================================================================== */

.board-minesweeper {
  display: grid;
  gap: 1px;
  background: var(--border-subtle);
  border: 2px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  overflow: hidden;
  width: 100%;
  max-width: 540px;
  margin: 0 auto;
  user-select: none;
  -webkit-user-select: none;
}

.board-ms-easy { grid-template-columns: repeat(9, 1fr); }
.board-ms-medium { grid-template-columns: repeat(16, 1fr); max-width: 640px; }
.board-ms-hard { grid-template-columns: repeat(30, 1fr); max-width: 900px; }

.cell-ms {
  aspect-ratio: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-card);
  cursor: pointer;
  font-weight: 700;
  font-size: 0.85rem;
  transition: background 0.1s;
  position: relative;
}

.cell-ms:not(.revealed):hover {
  background: var(--admin-hover-bg);
}

.cell-ms.revealed {
  background: var(--bg-main);
  cursor: default;
}

.cell-ms.revealed.mine {
  background: var(--color-error-bg);
}

.cell-ms.flagged {
  color: var(--danger);
}

.cell-ms.flagged .lucide {
  width: 14px;
  height: 14px;
  color: var(--danger);
}

.cell-ms.mine .lucide {
  width: 14px;
  height: 14px;
  color: var(--text-main);
}

/* Number colors (classic Minesweeper palette) */
.cell-ms.num-1 { color: var(--color-info-dark); }
.cell-ms.num-2 { color: var(--color-success); }
.cell-ms.num-3 { color: var(--color-error); }
.cell-ms.num-4 { color: #7c3aed; }
.cell-ms.num-5 { color: #b45309; }
.cell-ms.num-6 { color: #0891b2; }
.cell-ms.num-7 { color: var(--text-main); }
.cell-ms.num-8 { color: var(--text-soft); }

/* Mobile reveal/flag toggle */
.controls-minesweeper {
  display: flex;
  gap: var(--space-2);
  justify-content: center;
  margin-top: var(--space-4);
}

.ctrl-ms-btn {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  border: 1px solid var(--border-subtle);
  background: var(--bg-card);
  color: var(--text-main);
  border-radius: var(--radius-lg);
  cursor: pointer;
  font-size: 0.85rem;
  font-weight: 600;
  transition: var(--transition-base);
}

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

.ctrl-ms-btn .lucide {
  width: 16px;
  height: 16px;
}

/* Reveal/Flag toggle visible on all screen sizes */

/* Hard mode: smaller cells */
.board-ms-hard .cell-ms {
  font-size: 0.65rem;
}

.board-ms-hard .cell-ms.flagged .lucide,
.board-ms-hard .cell-ms.mine .lucide {
  width: 10px;
  height: 10px;
}

/* Medium mode tweaks */
.board-ms-medium .cell-ms {
  font-size: 0.75rem;
}

.board-ms-medium .cell-ms.flagged .lucide,
.board-ms-medium .cell-ms.mine .lucide {
  width: 12px;
  height: 12px;
}

@media (max-width: 480px) {
  .board-ms-hard {
    max-width: 100%;
    overflow-x: auto;
  }

  .board-ms-medium .cell-ms,
  .board-ms-hard .cell-ms {
    font-size: 0.6rem;
  }
}

/* ==========================================================================
   12. QUICK CALC
   ========================================================================== */

.board-quickcalc {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 360px;
  max-width: 480px;
  margin: 0 auto;
  width: 100%;
}

.qc-start-screen {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-4);
  text-align: center;
  padding: var(--space-8);
}

.qc-start-screen .lucide {
  width: 48px;
  height: 48px;
  color: var(--accent-primary);
}

.lucide.lucide-play {
  width: 24px;
  height: 24px;
  color: var(--accent-secondary);
}

.qc-start-screen h2 {
  font-size: 1.5rem;
  color: var(--text-main);
}

.qc-start-screen p {
  color: var(--text-muted);
}

.qc-question-area {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-6);
  width: 100%;
  padding: var(--space-4);
}

.qc-equation {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--text-main);
  letter-spacing: 2px;
}

.qc-progress-bar {
  width: 100%;
  height: 6px;
  background: var(--border-subtle);
  border-radius: 3px;
  overflow: hidden;
}

.qc-progress-fill {
  height: 100%;
  width: 100%;
  background: var(--accent-primary);
  border-radius: 3px;
  transition: width 1s linear, background 0.3s;
}

.qc-answers {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3);
  width: 100%;
  max-width: 360px;
}

.qc-answer-btn {
  padding: var(--space-4);
  font-size: 1.3rem;
  font-weight: 700;
  border: 2px solid var(--border-subtle);
  background: var(--bg-card);
  color: var(--text-main);
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: all 0.15s;
}

.qc-answer-btn:hover {
  border-color: var(--accent-primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

.qc-answer-btn.correct {
  background: var(--color-success-bg);
  border-color: var(--exam-success);
  color: var(--exam-success);
}

.qc-answer-btn.wrong {
  background: var(--color-error-bg);
  border-color: var(--exam-danger);
  color: var(--exam-danger);
}

.qc-feedback {
  font-size: 1.1rem;
  font-weight: 700;
  min-height: 28px;
  transition: color 0.2s;
}

.qc-feedback.correct {
  color: #22c55e;
}

.qc-feedback.wrong {
  color: var(--color-red-500);
}

@media (max-width: 480px) {
  .qc-equation {
    font-size: 1.8rem;
  }

  .qc-answer-btn {
    padding: var(--space-3);
    font-size: 1.1rem;
  }
}

/* ==========================================================================
   13. MEMORY MATRIX
   ========================================================================== */

.board-memmatrix {
  display: grid;
  gap: 8px;
  max-width: 400px;
  margin: 0 auto;
  width: 100%;
  padding: var(--space-2);
}

.mm-status {
  text-align: center;
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: var(--space-3);
  min-height: 24px;
  transition: color 0.2s;
}

.mm-status.show { color: var(--accent-primary); }
.mm-status.input { color: var(--text-main); }
.mm-status.correct { color: #22c55e; }
.mm-status.wrong { color: var(--color-red-500); }

.mm-tile {
  aspect-ratio: 1;
  background: var(--bg-card);
  border: 2px solid var(--border-subtle);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all 0.2s;
}

.mm-tile:hover:not(.correct):not(.wrong):not(.highlighted) {
  border-color: var(--accent-primary);
  transform: scale(1.05);
}

.mm-tile.highlighted {
  background: var(--accent-primary);
  border-color: var(--accent-primary);
}

.mm-tile.correct {
  background: #22c55e;
  border-color: #22c55e;
  cursor: default;
}

.mm-tile.wrong {
  background: var(--color-red-500);
  border-color: var(--color-red-500);
  cursor: default;
  animation: shake 0.3s;
}

@media (max-width: 480px) {
  .board-memmatrix {
    gap: 6px;
    max-width: 320px;
  }
}

/* ==========================================================================
   14. 24 GAME
   ========================================================================== */

.board-24game {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-5);
  max-width: 440px;
  margin: 0 auto;
  width: 100%;
  padding: var(--space-4);
}

.g24-target {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-muted);
}

.g24-target span {
  font-size: 2rem;
  font-weight: 800;
  color: var(--accent-primary);
}

.g24-numbers {
  display: flex;
  gap: var(--space-3);
  justify-content: center;
}

.g24-num-card {
  width: 64px;
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  font-weight: 800;
  background: var(--bg-card);
  border: 2px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: all 0.15s;
  color: var(--text-main);
}

.g24-num-card:hover:not(.used) {
  transform: translateY(-3px);
  border-color: rgba(59, 130, 246, 0.3);
  box-shadow: var(--shadow-sm);
  background: var(--admin-hover-bg);
}

.g24-num-card.used {
  opacity: 0.3;
  cursor: default;
  transform: scale(0.9);
}

.g24-expression {
  width: 100%;
  min-height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-main);
  border: 2px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: var(--space-2) var(--space-4);
}

.g24-expr-text {
  font-size: 1.4rem;
  font-weight: 700;
  font-family: monospace;
  color: var(--text-main);
  letter-spacing: 2px;
}

.g24-operators {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
  justify-content: center;
}

.g24-op-btn {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  font-weight: 700;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: var(--transition-base);
  color: var(--text-main);
}

.g24-op-btn:hover {
  transform: translateY(-2px);
  border-color: rgba(59, 130, 246, 0.3);
  box-shadow: var(--shadow-sm);
  background: var(--admin-hover-bg);
}

.g24-paren {
  color: var(--text-muted);
}

.g24-actions {
  display: flex;
  gap: var(--space-2);
}

.g24-feedback {
  font-size: 1rem;
  font-weight: 700;
  min-height: 24px;
}

.g24-feedback.correct { color: #22c55e; }
.g24-feedback.wrong { color: var(--color-red-500); }

@media (max-width: 480px) {
  .g24-num-card {
    width: 56px;
    height: 64px;
    font-size: 1.3rem;
  }

  .g24-op-btn {
    width: 42px;
    height: 42px;
    font-size: 1.1rem;
  }
}

/* ==========================================================================
   15. TOWER OF HANOI
   ========================================================================== */

.board-hanoi {
  display: flex;
  justify-content: center;
  gap: var(--space-4);
  max-width: 600px;
  margin: 0 auto;
  width: 100%;
  padding: var(--space-4) 0;
  min-height: 280px;
  align-items: flex-end;
}

.hanoi-peg {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  cursor: pointer;
  position: relative;
  min-height: 200px;
  justify-content: flex-end;
  padding-bottom: 0;
}

.hanoi-peg.selected {
  filter: brightness(1.1);
}

.hanoi-peg.selected .hanoi-rod {
  background: var(--accent-primary);
}

.hanoi-rod {
  width: 6px;
  height: 100%;
  min-height: 160px;
  background: var(--border-subtle);
  border-radius: 3px 3px 0 0;
  position: absolute;
  bottom: 12px;
  z-index: 0;
  transition: background 0.2s;
}

.hanoi-base {
  width: 100%;
  height: 12px;
  background: var(--border-subtle);
  border-radius: var(--radius-sm);
}

.hanoi-disks {
  display: flex;
  flex-direction: column-reverse;
  align-items: center;
  width: 100%;
  position: absolute;
  bottom: 12px;
  z-index: 1;
}

.hanoi-disk {
  height: 24px;
  border-radius: var(--radius-sm);
  margin-bottom: 2px;
  min-width: 24px;
  transition: width 0.2s;
}

@media (max-width: 480px) {
  .board-hanoi {
    gap: var(--space-2);
    min-height: 220px;
  }

  .hanoi-disk {
    height: 20px;
  }
}

/* ==========================================================================
   16. NUMBER BONDS
   ========================================================================== */

.board-numbonds {
  display: grid;
  gap: var(--space-3);
  max-width: 420px;
  margin: 0 auto;
  width: 100%;
  padding: var(--space-2);
}

.nb-target {
  text-align: center;
  font-size: var(--fs-lg);
  font-weight: var(--fw-semibold);
  color: var(--text-muted);
  margin-bottom: var(--space-3);
}

.nb-target span {
  font-size: var(--fs-3xl);
  font-weight: var(--fw-extrabold);
  color: var(--accent-primary);
}

.nb-tile {
  aspect-ratio: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  font-weight: var(--fw-bold);
  background: var(--bg-card);
  border: 2px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: all 0.15s;
  color: var(--text-main);
}

.nb-tile:hover:not(.matched) {
  border-color: var(--accent-primary);
  transform: translateY(-2px);
}

.nb-tile.selected {
  border-color: var(--accent-primary);
  background: rgba(59, 130, 246, 0.1);
  transform: scale(1.05);
}

.nb-tile.matched {
  background: var(--color-success-bg);
  border-color: var(--exam-success);
  opacity: 0.5;
  cursor: default;
}

.nb-tile.wrong {
  background: var(--color-error-bg);
  border-color: var(--exam-danger);
  animation: shake 0.3s;
}

/* ==========================================================================
   17. LIGHTS OUT
   ========================================================================== */

.board-lightsout {
  display: grid;
  gap: 4px;
  max-width: 400px;
  margin: 0 auto;
  width: 100%;
}

.lo-cell {
  aspect-ratio: 1;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all 0.15s;
  background: var(--bg-card);
  border: 2px solid var(--border-subtle);
}

.lo-cell.on {
  background: #fbbf24;
  border-color: var(--color-warning);
  box-shadow: 0 0 12px rgba(251, 191, 36, 0.5);
}

.lo-cell:hover {
  transform: scale(1.05);
}



/* ==========================================================================
   18. SYMBOL MATCH
   ========================================================================== */

.board-symbolmatch {
  display: grid;
  gap: var(--space-3);
  max-width: 480px;
  margin: 0 auto;
  width: 100%;
  perspective: 800px;
}

.sm-card {
  aspect-ratio: 1;
  cursor: pointer;
  position: relative;
}

.sm-card-inner {
  position: relative;
  width: 100%;
  height: 100%;
  transition: transform 0.4s;
  transform-style: preserve-3d;
}

.sm-card.flipped .sm-card-inner,
.sm-card.matched .sm-card-inner {
  transform: rotateY(180deg);
}

.sm-card-front,
.sm-card-back {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-lg);
  backface-visibility: hidden;
  font-weight: 700;
}

.sm-card-front {
  background: var(--accent-primary);
  color: #ffffff;
  font-size: 1.3rem;
  border: 2px solid var(--accent-primary);
}

.sm-card-back {
  background: var(--bg-card);
  color: var(--text-main);
  font-size: 1.8rem;
  border: 2px solid var(--border-subtle);
  transform: rotateY(180deg);
}

.sm-card.matched .sm-card-back {
  border-color: var(--exam-success);
  background: var(--color-success-bg);
}

@media (max-width: 480px) {
  .board-symbolmatch {
    gap: var(--space-2);
  }

  .sm-card-front { font-size: 1rem; }
  .sm-card-back { font-size: 1.3rem; }
}

/* ==========================================================================
   19. SEQUENCE MASTER
   ========================================================================== */

.board-seqmaster {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
  max-width: 360px;
  margin: 0 auto;
  width: 100%;
  padding: var(--space-4);
}

.seq-status {
  text-align: center;
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: var(--space-3);
  min-height: 24px;
}

.seq-status.show { color: var(--accent-primary); }
.seq-status.input { color: var(--text-main); }
.seq-status.correct { color: #22c55e; }
.seq-status.wrong { color: var(--color-red-500); }

.seq-panel {
  aspect-ratio: 1;
  border-radius: var(--radius-xl);
  cursor: pointer;
  transition: all 0.15s;
  opacity: 0.6;
}

.seq-panel:hover { opacity: 0.8; }

.seq-panel[data-color="red"] { background: var(--color-red-500); }
.seq-panel[data-color="green"] { background: #22c55e; }
.seq-panel[data-color="blue"] { background: var(--color-info); }
.seq-panel[data-color="yellow"] { background: #eab308; }

.seq-panel.active {
  opacity: 1;
  transform: scale(1.05);
  box-shadow: 0 0 20px rgba(0, 0, 0, 0.3);
}

/* ==========================================================================
   20. NUMBER SEQUENCE
   ========================================================================== */

.board-numseq {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-5);
  max-width: 500px;
  margin: 0 auto;
  width: 100%;
  padding: var(--space-4);
}

.ns-sequence {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-wrap: wrap;
  justify-content: center;
}

.ns-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 48px;
  height: 48px;
  padding: 0 var(--space-2);
  background: var(--bg-card);
  border: 2px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text-main);
}

.ns-num.missing {
  background: var(--admin-hover-bg);
  border-color: rgba(59, 130, 246, 0.3);
  color: var(--accent-secondary);
  font-size: var(--fs-3xl);
}

.ns-comma {
  color: var(--text-muted);
  font-size: 1.2rem;
}

.ns-input-area {
  display: flex;
  gap: var(--space-2);
  align-items: center;
  margin-top: var(--space-2);
}

.ns-input {
  width: 100px;
  padding: var(--space-2) var(--space-3);
  font-size: 1.2rem;
  font-weight: 700;
  text-align: center;
  border: 2px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  background: var(--bg-card);
  color: var(--text-main);
  outline: none;
}

.ns-input:focus {
  border-color: var(--input-focus-border);
  box-shadow: 0 0 0 3px var(--input-focus-ring);
}

.ns-feedback {
  font-size: 1rem;
  font-weight: 700;
  min-height: 24px;
}

.ns-feedback.correct { color: #22c55e; }
.ns-feedback.wrong { color: var(--color-red-500); }

.ns-hint {
  font-size: 0.85rem;
  color: var(--text-muted);
  min-height: 20px;
}

/* ==========================================================================
   21. KENKEN
   ========================================================================== */

.board-kenken {
  display: grid;
  gap: 0;
  max-width: 400px;
  margin: 0 auto;
  width: 100%;
}

.kk-cell {
  aspect-ratio: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  cursor: pointer;
  transition: background 0.1s;
}

.kk-cell.cage-top { border-top: 2.5px solid var(--text-main); }
.kk-cell.cage-bottom { border-bottom: 2.5px solid var(--text-main); }
.kk-cell.cage-left { border-left: 2.5px solid var(--text-main); }
.kk-cell.cage-right { border-right: 2.5px solid var(--text-main); }

.kk-cell.selected {
  background: rgba(59, 130, 246, 0.15);
}

.kk-cage-label {
  position: absolute;
  top: 2px;
  left: 4px;
  font-size: 0.6rem;
  font-weight: 700;
  color: var(--text-muted);
}

.kk-value {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-main);
}

.kenken-numpad {
  display: flex;
  gap: var(--space-2);
  justify-content: center;
  margin-top: var(--space-4);
}

.kk-numpad-btn {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  font-weight: 700;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: var(--transition-base);
  color: var(--text-main);
}

.kk-numpad-btn:hover {
  border-color: var(--accent-primary);
  background: var(--admin-hover-bg);
}

.kk-clear {
  color: var(--danger);
}

/* ==========================================================================
   22. NONOGRAM
   ========================================================================== */

.nono-wrapper {
  overflow-x: auto;
  width: 100%;
}

.board-nonogram {
  display: grid;
  gap: 0;
  max-width: 520px;
  margin: 0 auto;
  width: 100%;
}

.nono-corner {
  background: transparent;
}

.nono-col-clue {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-end;
  gap: 1px;
  padding: 2px;
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--text-muted);
}

.nono-row-clue {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 4px;
  padding-right: 6px;
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--text-muted);
  white-space: nowrap;
}

.nono-cell {
  aspect-ratio: 1;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  cursor: pointer;
  transition: background 0.1s;
  position: relative;
}

.nono-cell:hover {
  background: var(--admin-hover-bg);
}

.nono-cell.filled {
  background: var(--text-main);
}

.nono-cell.marked::after {
  content: '\00D7'; /* multiplication sign — escaped to survive non-UTF-8-safe file transfers */
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--danger);
  font-size: 0.75rem;
  font-weight: 700;
}

.nono-cell.thick-left {
  border-left: 2px solid var(--text-muted);
}

.nono-cell.thick-top {
  border-top: 2px solid var(--text-muted);
}

.nono-mode-toggle {
  display: flex;
  gap: var(--space-2);
  justify-content: center;
  margin-bottom: var(--space-3);
}

@media (max-width: 480px) {
  .nono-col-clue,
  .nono-row-clue {
    font-size: 0.55rem;
  }
}

/* =======================================================
   23. MAGIC SQUARE
======================================================= */

.board-magicsq {
  display: grid;
  gap: 3px;
  max-width: 340px;
  width: 100%;
  margin: 0 auto var(--space-4);
  aspect-ratio: 1;
}

.ms-cell {
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--surface-primary);
  border: 2px solid var(--border-primary);
  border-radius: var(--radius-sm);
  font-size: 1.5rem;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.15s ease;
  aspect-ratio: 1;
  min-width: 60px;
  color: var(--text-primary);
}

.ms-cell:hover {
  border-color: var(--accent-primary);
  background: var(--accent-ghost);
}

.ms-cell.selected {
  border-color: var(--accent-primary);
  background: var(--accent-ghost);
  box-shadow: 0 0 0 2px var(--accent-primary);
}

.ms-cell.filled {
  color: var(--accent-primary);
}

.ms-hint {
  text-align: center;
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: var(--space-3);
  padding: var(--space-2) var(--space-3);
  background: var(--accent-ghost);
  border-radius: var(--radius-sm);
}

.ms-hint span {
  font-size: var(--fs-lg);
  font-weight: var(--fw-bold);
  color: var(--accent-secondary);
}

.ms-numpad {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  justify-content: center;
  margin-top: var(--space-3);
}

.ms-numpad-btn {
  width: 40px;
  height: 40px;
  border: 2px solid var(--border-primary);
  border-radius: var(--radius-sm);
  background: var(--surface-primary);
  color: var(--text-primary);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s ease;
}

.ms-numpad-btn:hover {
  border-color: var(--accent-primary);
  background: var(--accent-ghost);
}

.ms-numpad-btn.used {
  opacity: 0.35;
  pointer-events: none;
}

.ms-numpad-btn.ms-clear {
  background: var(--danger-ghost);
  border-color: var(--danger);
  color: var(--danger);
}

/* =======================================================
   24. KAKURO
======================================================= */

.board-kakuro {
  display: grid;
  gap: 2px;
  max-width: 420px;
  width: 100%;
  margin: 0 auto var(--space-4);
}

.kaku-cell {
  display: flex;
  align-items: center;
  justify-content: center;
  aspect-ratio: 1;
  min-width: 45px;
  border: 1px solid var(--border-primary);
  border-radius: 2px;
  font-size: 1.2rem;
  font-weight: 700;
  position: relative;
}

.kaku-black {
  background: var(--text-muted);
}

.kaku-clue {
  background: var(--surface-secondary);
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--text-secondary);
  background-image: linear-gradient(to bottom right, transparent calc(50% - 1px), var(--border-primary) 50%, transparent calc(50% + 1px));
}

.kaku-down {
  position: absolute;
  bottom: 1px;
  right: 3px;
  color: var(--accent-primary);
  font-size: 0.7rem;
  font-weight: 700;
  line-height: 1;
}

.kaku-right {
  position: absolute;
  top: 1px;
  left: 3px;
  color: var(--warning);
  font-size: 0.7rem;
  font-weight: 700;
  line-height: 1;
}

.kaku-input {
  background: var(--surface-primary);
  cursor: pointer;
  color: var(--accent-primary);
  transition: all 0.15s ease;
}

.kaku-input:hover {
  background: var(--accent-ghost);
}

.kaku-input.selected {
  background: var(--accent-ghost);
  box-shadow: inset 0 0 0 2px var(--accent-primary);
}

.kakuro-numpad {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  justify-content: center;
  margin-top: var(--space-4);
  width: 100%;
}

/* =======================================================
   25. BINARY PUZZLE
======================================================= */

.board-binary {
  display: grid;
  gap: 3px;
  max-width: 420px;
  width: 100%;
  margin: 0 auto var(--space-4);
}

.bp-cell {
  display: flex;
  align-items: center;
  justify-content: center;
  aspect-ratio: 1;
  min-width: 45px;
  border: 2px solid var(--border-primary);
  border-radius: var(--radius-sm);
  font-size: 1.4rem;
  font-weight: 800;
  cursor: pointer;
  transition: all 0.15s ease;
  background: var(--surface-primary);
  color: var(--text-primary);
  user-select: none;
}

.bp-cell:hover {
  border-color: var(--accent-primary);
  transform: scale(1.05);
}

.bp-cell.selected {
  box-shadow: 0 0 0 2px var(--accent-primary);
}

.bp-cell.locked {
  cursor: default;
  background: var(--surface-secondary);
  color: var(--text-primary);
}

.bp-cell.locked:hover {
  transform: none;
}

.bp-cell.val-0 {
  color: var(--accent-primary);
}

.bp-cell.val-1 {
  color: var(--warning);
}

.bp-cell.filled {
  background: var(--surface-primary);
}

.bp-cell.thick-left {
  border-left: 3px solid var(--text-muted);
}

.bp-cell.thick-top {
  border-top: 3px solid var(--text-muted);
}

@media (max-width: 480px) {
  .board-binary {
    max-width: 100%;
  }
  .bp-cell {
    font-size: 1rem;
  }
}

/* =======================================================
   26. MATH CROSSWORD
======================================================= */

.board-mathcross {
  display: grid;
  gap: 3px;
  max-width: 340px;
  width: 100%;
  margin: 0 auto var(--space-4);
  grid-template-columns: repeat(5, 1fr);
}

.mc-cell {
  display: flex;
  align-items: center;
  justify-content: center;
  aspect-ratio: 1;
  min-width: 50px;
  border-radius: var(--radius-sm);
  font-size: 1.2rem;
  font-weight: 700;
  transition: all 0.15s ease;
}

.mc-number {
  border: 2px solid var(--border-primary);
}

.mc-number.locked {
  background: var(--surface-secondary);
  color: var(--text-primary);
}

.mc-number.editable {
  cursor: pointer;
  color: var(--accent-primary);
}

.mc-number.editable:hover {
  border-color: var(--accent-primary);
  background: var(--accent-ghost);
}

.mc-number.editable.empty {
  background: var(--accent-ghost);
  border-style: dashed;
}

.mc-number.selected {
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 2px var(--accent-primary);
  background: var(--accent-ghost);
}

.mc-op {
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--warning);
  background: transparent;
}

.mc-eq {
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--text-muted);
  background: transparent;
}

.mc-blank {
  background: transparent;
}

.mc-numpad {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  justify-content: center;
  margin-top: var(--space-3);
}

.mc-numpad-btn {
  width: 45px;
  height: 45px;
  border: 2px solid var(--border-primary);
  border-radius: var(--radius-sm);
  background: var(--surface-primary);
  color: var(--text-primary);
  font-size: var(--fs-md);
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s ease;
}

.mc-numpad-btn:hover {
  border-color: var(--accent-primary);
  background: var(--accent-ghost);
}

.mc-numpad-btn.mc-clear {
  background: var(--danger-ghost);
  border-color: var(--danger);
  color: var(--danger);
}

@media (max-width: 480px) {
  .board-mathcross {
    max-width: 100%;
  }
}

/* ==========================================================================
   27. NERDLE GAME
   Math Wordle — guess the hidden equation in 6 tries
   ========================================================================== */

.nerdle-grid {
  display: flex;
  flex-direction: column;
  gap: 6px;
  align-items: center;
  margin: var(--space-2) auto var(--space-1);
  width: fit-content;
}

.nerdle-row {
  display: flex;
  gap: 6px;
}

.nerdle-cell {
  width: 52px;
  height: 52px;
  border: 2px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--fs-xl);
  font-weight: var(--fw-bold);
  font-family: var(--font-main);
  background: var(--bg-card);
  color: var(--text-main);
  user-select: none;
  transition: border-color 0.1s, transform 0.1s;
}

.nerdle-cell-filled {
  border-color: var(--text-soft);
  transform: scale(1.05);
}

.nerdle-cell-revealed {
  border-color: transparent;
  color: #ffffff;
}

.nerdle-correct  { background: var(--color-success); }
.nerdle-present  { background: var(--color-warning); }
.nerdle-absent   { background: var(--text-muted); }

@keyframes nerdle-shake {
  0%, 100% { transform: translateX(0); }
  20%, 60% { transform: translateX(-6px); }
  40%, 80% { transform: translateX(6px); }
}
.nerdle-shake { animation: nerdle-shake 0.4s ease; }

/* Message bar */
.nerdle-message {
  min-height: 22px;
  text-align: center;
  font-size: var(--fs-sm);
  font-weight: var(--fw-semibold);
  color: var(--text-main);
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 3px 16px;
  display: inline-block;
  margin: var(--space-1) auto;
  opacity: 0;
  transition: opacity 0.2s;
  pointer-events: none;
}
.nerdle-message-visible { opacity: 1; }

/* On-screen keyboard */
.nerdle-keyboard {
  display: flex;
  flex-direction: column;
  gap: 6px;
  align-items: center;
  margin-top: var(--space-1);
}

.nk-row {
  display: flex;
  gap: 5px;
}

.nk-key {
  min-width: 44px;
  height: 40px;
  padding: 0 6px;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  background: var(--bg-card);
  color: var(--text-main);
  font-size: var(--fs-md);
  font-weight: var(--fw-semibold);
  font-family: var(--font-main);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.15s, transform 0.1s;
  user-select: none;
}
.nk-key:hover  { background: var(--hover-bg); }
.nk-key:active { transform: scale(0.93); }

.nk-op    { color: var(--accent-primary); }
.nk-wide  { min-width: 66px; }
.nk-enter {
  min-width: 80px;
  background: var(--btn-gradient);
  color: #ffffff;
  border: none;
}
.nk-enter:hover { background: var(--accent-gradient); }

/* Key feedback colors */
.nk-correct { background: var(--color-success) !important; color: #ffffff !important; border-color: transparent; }
.nk-present { background: var(--color-warning) !important; color: #ffffff !important; border-color: transparent; }
.nk-absent  { background: #9ca3af !important;              color: #ffffff !important; border-color: transparent; }

/* Legend in sidebar */
.nerdle-legend {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: var(--fs-sm);
}
.nl-tile {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  border-radius: 4px;
  font-weight: var(--fw-bold);
  font-size: var(--fs-sm);
  color: #ffffff;
  flex-shrink: 0;
}
.nl-correct { background: var(--color-success); }
.nl-present { background: var(--color-warning); }
.nl-absent  { background: var(--text-muted); }

/* Mobile */
@media (max-width: 540px) {
  .nerdle-cell {
    width: 40px;
    height: 40px;
    font-size: var(--fs-base);
  }
  .nk-key   { min-width: 38px; height: 46px; font-size: var(--fs-sm); padding: 0 4px; }
  .nk-wide  { min-width: 54px; }
  .nk-enter { min-width: 68px; }
}

/* ==========================================================================
   28. COUNTDOWN NUMBERS GAME
   Use 6 numbers and +-×÷ to reach the target
   ========================================================================== */

.board-countdown {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-5);
  padding: var(--space-5) 0;
}

.cd-target-area { text-align: center; }
.cd-target-label {
  font-size: var(--fs-sm);
  font-weight: var(--fw-semibold);
  color: var(--text-soft);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 4px;
}
.cd-target-number {
  font-size: 3rem;
  font-weight: var(--fw-black);
  color: var(--accent-primary);
  line-height: 1;
  background: var(--admin-hover-bg);
  border: 2px solid var(--accent-primary);
  border-radius: var(--radius-lg);
  padding: var(--space-3) var(--space-8);
  display: inline-block;
}

.cd-numbers {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  justify-content: center;
}
.cd-num-btn {
  width: 60px;
  height: 60px;
  border: 2px solid var(--border-subtle);
  border-radius: var(--radius-md);
  background: var(--bg-card);
  color: var(--text-main);
  font-size: var(--fs-xl);
  font-weight: var(--fw-bold);
  font-family: var(--font-main);
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s, transform 0.1s, opacity 0.15s;
}
.cd-num-btn:hover:not(:disabled) {
  background: var(--admin-hover-bg);
  border-color: var(--accent-primary);
  transform: scale(1.06);
}
.cd-num-btn:active:not(:disabled) { transform: scale(0.94); }
.cd-num-btn.cd-num-used { opacity: 0.3; cursor: not-allowed; }

.cd-expr-area {
  width: 100%;
  max-width: 420px;
  text-align: center;
}
.cd-expr-display {
  min-height: 48px;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: var(--space-3) var(--space-4);
  font-size: var(--fs-xl);
  font-weight: var(--fw-semibold);
  color: var(--text-main);
  word-break: break-all;
}
.cd-expr-result {
  font-size: var(--fs-md);
  font-weight: var(--fw-bold);
  margin-top: var(--space-2);
  min-height: 24px;
  transition: color 0.2s;
}
.cd-exact { color: var(--color-success); }
.cd-close { color: var(--color-warning); }
.cd-far   { color: var(--text-soft); }

.cd-operators {
  display: flex;
  gap: var(--space-3);
  flex-wrap: wrap;
  justify-content: center;
}
.cd-op-btn {
  width: 52px;
  height: 52px;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  background: var(--bg-card);
  color: var(--accent-primary);
  font-size: var(--fs-xl);
  font-weight: var(--fw-bold);
  font-family: var(--font-main);
  cursor: pointer;
  transition: background 0.15s, transform 0.1s;
}
.cd-op-btn:hover  { background: var(--admin-hover-bg); }
.cd-op-btn:active { transform: scale(0.93); }
.cd-paren         { color: var(--text-soft); }

.cd-actions {
  display: flex;
  gap: var(--space-3);
  flex-wrap: wrap;
  justify-content: center;
}

.cd-feedback {
  min-height: 24px;
  font-size: var(--fs-sm);
  font-weight: var(--fw-semibold);
  text-align: center;
  opacity: 0;
  transition: opacity 0.2s;
}
.cd-feedback-visible { opacity: 1; }
.cd-feedback-error   { color: var(--color-error); }

@media (max-width: 480px) {
  .cd-target-number { font-size: 2.2rem; padding: var(--space-2) var(--space-4); }
  .cd-num-btn       { width: 50px; height: 50px; font-size: var(--fs-base); }
  .cd-op-btn        { width: 44px; height: 44px; font-size: var(--fs-base); }
}

/* ============================================================
   29. KILLER SUDOKU
   ============================================================ */
.ks-board {
  display: grid;
  grid-template-columns: repeat(9, 1fr);
  border: 2px solid var(--text-main);
  width: 100%;
  max-width: 450px;
  margin: var(--space-4) auto;
  aspect-ratio: 1;
  border-radius: var(--radius-sm);
  overflow: hidden;
  user-select: none;
}

.ks-cell {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: clamp(0.75rem, 2vw, 1rem);
  font-weight: var(--fw-semibold);
  cursor: pointer;
  transition: background 0.1s;
  background: var(--bg-main);
  color: var(--text-main);
  min-height: 0;
}

/* cage sum label */
.ks-cage-sum {
  position: absolute;
  top: 2px;
  left: 3px;
  font-size: clamp(0.45rem, 1.2vw, 0.62rem);
  font-weight: var(--fw-bold);
  color: var(--text-soft);
  line-height: 1;
  pointer-events: none;
  z-index: 1;
}

.ks-cell-number {
  position: relative;
  z-index: 2;
  line-height: 1;
}

/* selection & highlighting */
.ks-cell.ks-selected {
  background: var(--admin-active-bg) !important;
}
.ks-cell.ks-highlighted {
  background: var(--admin-hover-bg) !important;
}
.ks-cell.ks-error {
  color: var(--exam-danger);
  background: var(--color-error-bg) !important;
}

/* Numpad */
.ks-numpad {
  display: flex;
  gap: var(--space-2);
  justify-content: center;
  flex-wrap: wrap;
  margin: var(--space-3) auto 0;
  max-width: 420px;
}

.ks-num-btn {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  border: 1.5px solid var(--border-subtle);
  background: var(--bg-section-soft);
  color: var(--text-main);
  font-size: var(--fs-lg);
  font-weight: var(--fw-semibold);
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
  display: flex;
  align-items: center;
  justify-content: center;
}
.ks-num-btn:hover {
  background: var(--hover-bg);
  border-color: var(--accent-primary);
}
.ks-clear { color: var(--color-error); }

/* Legend */
.ks-legend {
  margin-top: var(--space-3);
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--fs-sm);
  color: var(--text-soft);
}
.ks-legend-cage {
  width: 36px;
  height: 36px;
  border: 1.5px dashed var(--text-soft);
  border-radius: var(--radius-sm);
  position: relative;
  background: rgba(63, 0, 209, 0.06);
}
.ks-cage-sum-demo {
  position: absolute;
  top: 2px;
  left: 3px;
  font-size: 0.58rem;
  font-weight: var(--fw-bold);
  color: var(--text-soft);
}



@media (max-width: 480px) {
  .ks-cage-sum  { font-size: 0.4rem; top: 1px; left: 2px; }
  .ks-num-btn   { width: 36px; height: 36px; font-size: var(--fs-base); }
}

/* ============================================================
   30. CRYPTARITHMETIC
   ============================================================ */
.board-crypto {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-4);
  width: 100%;
}

.ca-puzzle-desc {
  font-size: var(--fs-sm);
  color: var(--text-soft);
  text-align: center;
  margin: 0;
}

/* Live equation display */
.ca-equation-display {
  font-size: clamp(1.3rem, 4vw, 2rem);
  font-weight: var(--fw-bold);
  letter-spacing: 0.08em;
  text-align: center;
  font-family: monospace;
  padding: var(--space-2) var(--space-4);
  background: var(--bg-section-soft);
  border-radius: var(--radius-md);
  min-height: 2.6rem;
  width: 100%;
  max-width: 480px;
  line-height: 1.4;
}

.ca-letter-colored {
  display: inline-block;
  padding: 0 2px;
  border-radius: 3px;
  font-weight: var(--fw-bold);
}

/* Eval result */
.ca-eval-result {
  font-size: var(--fs-sm);
  font-weight: var(--fw-semibold);
  color: var(--text-soft);
  min-height: 1.2em;
  text-align: center;
}
.ca-eval-ok  { color: var(--color-success); }
.ca-eval-err { color: var(--color-error); }

/* Letter assignment slots */
.ca-assignments {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  justify-content: center;
  max-width: 480px;
  width: 100%;
}

.ca-slot {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
}

.ca-slot-letter {
  font-size: var(--fs-sm);
  font-weight: var(--fw-bold);
  color: var(--text-soft);
  line-height: 1;
}

.ca-slot-digit {
  width: 40px;
  height: 40px;
  border: 2px solid var(--border-subtle);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--fs-lg);
  font-weight: var(--fw-bold);
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
  background: var(--bg-card);
  color: var(--text-main);
  font-family: monospace;
}
.ca-slot-digit.ca-slot-selected {
  border-color: var(--accent-primary);
  background: rgba(63, 0, 209, 0.1);
}
.ca-slot-digit.ca-slot-filled {
  border-color: var(--color-success);
  color: var(--accent-primary);
}
.ca-slot-digit.ca-slot-conflict {
  border-color: var(--color-error);
  background: rgba(220, 38, 38, 0.1);
}

/* Digit numpad */
.ca-numpad {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
  justify-content: center;
  max-width: 420px;
  width: 100%;
}

.ca-digit-btn {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  border: 1.5px solid var(--border-subtle);
  background: var(--bg-section-soft);
  color: var(--text-main);
  font-size: var(--fs-lg);
  font-weight: var(--fw-semibold);
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
  display: flex;
  align-items: center;
  justify-content: center;
}
.ca-digit-btn:hover {
  background: var(--hover-bg);
  border-color: var(--accent-primary);
}
.ca-digit-btn.ca-digit-used {
  opacity: 0.45;
}
.ca-clear-btn {
  color: var(--color-error);
  border-color: var(--color-error);
}

/* Actions */
.ca-actions {
  display: flex;
  gap: var(--space-3);
  flex-wrap: wrap;
  justify-content: center;
}

/* Feedback */
.ca-feedback {
  min-height: 24px;
  font-size: var(--fs-sm);
  font-weight: var(--fw-semibold);
  text-align: center;
  color: var(--text-soft);
}
.ca-feedback-error   { color: var(--color-error); }

/* Example box */
.ca-example-box {
  margin-top: var(--space-3);
  padding: var(--space-3);
  border-radius: var(--radius-md);
  background: var(--bg-section-soft);
  border: 1px solid var(--border-subtle);
  font-size: var(--fs-sm);
}
.ca-example-title {
  font-weight: var(--fw-semibold);
  color: var(--text-soft);
  margin-bottom: var(--space-1);
  font-size: var(--fs-xs);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.ca-example {
  font-family: monospace;
  font-size: var(--fs-base);
  font-weight: var(--fw-bold);
  color: var(--text-main);
}
.ca-example-ans {
  color: var(--color-success);
  font-size: var(--fs-sm);
  margin-top: 2px;
}


@media (max-width: 480px) {
  .ca-slot-digit { width: 34px; height: 34px; font-size: var(--fs-base); }
  .ca-digit-btn  { width: 38px; height: 38px; font-size: var(--fs-base); }
  .ca-equation-display { font-size: 1.1rem; }
}

/* ==========================================================================
   31. SHARED GAME UTILITIES
   ========================================================================== */

/* Lucide icon inside .game-modal-icon container */
.game-modal-icon .lucide {
  width: 36px;
  height: 36px;
}

/* Disable pointer events via class (quick-calc answer buttons) */
.pointer-disabled {
  pointer-events: none;
}

/* Countdown game: timer warning state */
.countdown-timer-warning {
  color: var(--color-error);
}

/* Quick-calc: progress bar danger state */
.qc-progress-warning {
  background: var(--danger);
}

/* ==========================================================================
   32. APPROXIMATION CHALLENGE
   ========================================================================== */

.board-approximation {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-4);
  min-height: 350px;
}

.ap-numbers-row {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-wrap: wrap;
  justify-content: center;
  font-size: 1.8rem;
  font-weight: 700;
  line-height: 1.4;
}

.ap-number {
  background: var(--bg-page);
  border: 2px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 4px 12px;
  color: var(--accent-primary);
}

.ap-op {
  color: var(--text-muted);
  font-size: 1.5rem;
  font-weight: 400;
}

@media (max-width: 480px) {
  .ap-numbers-row {
    font-size: 1.3rem;
    gap: var(--space-1);
  }

  .ap-op {
    font-size: 1.1rem;
  }
}

/* ==========================================================================
   33. AVERAGE RACE
   ========================================================================== */

.board-avgrace {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-4);
  min-height: 350px;
}

.avg-question-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-3);
}

.avg-label {
  font-size: var(--fs-base);
  font-weight: var(--fw-semibold);
  color: var(--text-soft);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.avg-numbers {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-2);
}

.avg-chip {
  background: var(--bg-page);
  border: 2px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 8px 16px;
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--accent-primary);
  min-width: 56px;
  text-align: center;
}

@media (max-width: 480px) {
  .avg-chip {
    font-size: 1.3rem;
    padding: 6px 12px;
    min-width: 44px;
  }
}

/* ==========================================================================
   34. PERCENTAGE BLITZ
   ========================================================================== */

.board-pctblitz {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-4);
  min-height: 350px;
}

/* ==========================================================================
   35. ODD ONE OUT
   ========================================================================== */

.board-oddoneout {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-4);
  min-height: 350px;
}

.ooo-label {
  font-size: var(--fs-base);
  font-weight: var(--fw-semibold);
  color: var(--text-soft);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.ooo-numbers {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-3);
}

.ooo-number-btn {
  background: var(--bg-page);
  border: 2px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 12px 20px;
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--accent-primary);
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s, transform 0.1s;
  min-width: 72px;
  text-align: center;
  font-family: inherit;
}

.ooo-number-btn:hover:not(.pointer-disabled) {
  background: var(--surface-tertiary);
  border-color: var(--accent-primary);
  transform: translateY(-2px);
}

.ooo-number-btn.correct {
  background: var(--color-success-bg);
  border-color: var(--exam-success);
  color: var(--exam-success);
}

.ooo-number-btn.wrong {
  background: var(--color-error-bg);
  border-color: var(--exam-danger);
  color: var(--exam-danger);
}

@media (max-width: 480px) {
  .ooo-number-btn {
    font-size: 1.4rem;
    padding: 10px 14px;
    min-width: 56px;
  }
}

/* ==========================================================================
   36. NUMBERLE
   ========================================================================== */

.board-numberle {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4);
  min-height: 380px;
}

.nl-board-area {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-3);
  width: 100%;
}

/* Grid */
.nl-grid {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.nl-row {
  display: flex;
  gap: 6px;
}

.nl-cell {
  width: 62px;
  height: 62px;
  border: 2px solid var(--border-subtle);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--text-main);
  background: var(--bg-page);
  user-select: none;
  transition: border-color 0.1s;
}

.nl-cell.nl-filled {
  border-color: var(--text-soft);
}

.nl-cell.nl-green {
  background: #22c55e;
  border-color: #22c55e;
  color: #ffffff;
}

.nl-cell.nl-yellow {
  background: var(--color-warning);
  border-color: var(--color-warning);
  color: #ffffff;
}

.nl-cell.nl-grey {
  background: var(--text-muted);
  border-color: var(--text-muted);
  color: #ffffff;
}

/* Message */
.nl-message {
  font-size: 0.875rem;
  color: var(--text-soft);
  min-height: 20px;
  text-align: center;
  font-weight: 500;
}

/* Keyboard */
.nl-keyboard {
  display: flex;
  flex-direction: column;
  gap: 8px;
  width: 100%;
  max-width: 360px;
}

.nl-keyboard-row {
  display: flex;
  justify-content: center;
  gap: 7px;
}

.nl-key {
  width: 46px;
  height: 56px;
  border: 1.5px solid var(--border-subtle);
  border-radius: var(--radius-md);
  background: var(--bg-card);
  color: var(--text-main);
  font-size: 1.1rem;
  font-weight: 700;
  cursor: pointer;
  font-family: inherit;
  user-select: none;
  box-shadow: 0 2px 0 var(--border-subtle);
  transition: background 0.1s, color 0.1s, box-shadow 0.1s, transform 0.1s;
}

.nl-key-wide {
  width: 72px;
  font-size: 0.9rem;
}

.nl-key:hover:not(.nl-key-green):not(.nl-key-yellow):not(.nl-key-grey) {
  background: var(--admin-hover-bg);
  border-color: var(--border-primary);
}

.nl-key:active:not(.nl-key-green):not(.nl-key-yellow):not(.nl-key-grey) {
  transform: translateY(2px);
  box-shadow: none;
}

.nl-key-green  { background: #22c55e; border-color: var(--color-success); box-shadow: 0 2px 0 #15803d; color: #ffffff; }
.nl-key-yellow { background: var(--color-warning); border-color: #d97706; box-shadow: 0 2px 0 #b45309; color: #ffffff; }
.nl-key-grey   { background: var(--text-muted); border-color: var(--text-soft); box-shadow: 0 2px 0 #4b5563; color: #ffffff; }



@media (max-width: 480px) {
  .nl-cell {
    width: 52px;
    height: 52px;
    font-size: 1.3rem;
  }

  .nl-key      { width: 38px; height: 48px; font-size: 1rem; }
  .nl-key-wide { width: 60px; font-size: 0.8rem; }
}

/* ==========================================================================
   37. SPEED COMPARISON
   ========================================================================== */

.board-speedcomp {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-4);
  min-height: 350px;
}

.sc-question-label {
  font-size: var(--fs-base);
  font-weight: var(--fw-semibold);
  color: var(--text-soft);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.sc-choices {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  width: 100%;
}

.sc-choice {
  flex: 1;
  max-width: fit-content;
  min-height: 90px;
  background: var(--bg-page);
  border: 2px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  font-size: 2rem;
  font-weight: 700;
  color: var(--accent-primary);
  cursor: pointer;
  font-family: inherit;
  padding: var(--space-3);
  transition: background 0.15s, border-color 0.15s, transform 0.1s;
  word-break: break-all;
}

.sc-choice:hover:not(.pointer-disabled) {
  background: var(--surface-tertiary);
  border-color: var(--accent-primary);
  transform: translateY(-2px);
}

.sc-choice.correct {
  background: var(--color-success-bg);
  border-color: var(--exam-success);
  color: var(--exam-success);
}

.sc-choice.wrong {
  background: var(--color-error-bg);
  border-color: var(--exam-danger);
  color: var(--exam-danger);
}

.sc-versus {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-muted);
  flex-shrink: 0;
}

@media (max-width: 480px) {
  .sc-choice {
    font-size: 1.5rem;
    min-height: 72px;
    max-width: 130px;
  }
}

/* ==========================================================================
   38. MISSING OPERATOR
   ========================================================================== */

.board-mop {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-4);
  min-height: 350px;
}

/* Equation display row */
.mop-equation {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-wrap: wrap;
  justify-content: center;
  margin-bottom: var(--space-2);
}

.mop-num,
.mop-eq,
.mop-result {
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-main);
  line-height: 1;
}

.mop-result {
  color: var(--accent-primary);
}

/* Blank operator slot */
.mop-blank {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--text-muted);
  background: var(--surface-tertiary);
  border: 2px dashed var(--border-subtle);
  border-radius: var(--radius-sm);
}

/* Answer buttons — operator pair format "+ , ×" */
.qc-answers {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3);
  width: 100%;
  max-width: 420px;
}



@media (max-width: 480px) {
  .mop-num,
  .mop-eq,
  .mop-result {
    font-size: 1.5rem;
  }

  .mop-blank {
    width: 36px;
    height: 36px;
    font-size: 1.1rem;
  }
}

/* ==========================================================================
   39. SIMPLIFICATION SPRINT
   ========================================================================== */

.board-simsprint {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-4);
  min-height: 350px;
}

.ss-expr-label {
  font-size: var(--fs-sm);
  font-weight: var(--fw-semibold);
  color: var(--text-soft);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

/* Expression display box */
.ss-expr {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--text-main);
  text-align: center;
  padding: var(--space-4) var(--space-6);
  background: var(--bg-section-soft);
  border: 1.5px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  min-width: 260px;
  letter-spacing: 0.02em;
  line-height: 1.4;
}

@media (max-width: 480px) {
  .ss-expr {
    font-size: 1.2rem;
    padding: var(--space-3) var(--space-4);
    min-width: 0;
    width: 100%;
  }
}

/* ==========================================================================
   40. FACTOR FINDER
   ========================================================================== */

.board-factorfinder {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-4);
  min-height: 350px;
}

/* Question text: "Which is a factor of 72?" */
.ff-question-text {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-main);
  text-align: center;
  padding: var(--space-5) var(--space-6);
  background: var(--bg-section-soft);
  border: 1.5px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  min-width: 260px;
  line-height: 1.4;
}

@media (max-width: 480px) {
  .ff-question-text {
    font-size: 1.15rem;
    padding: var(--space-3) var(--space-4);
    min-width: 0;
    width: 100%;
  }
}

/* ==========================================================================
   41. FUTOSHIKI
   Grid cells (.fut-cell), inequality arrows (.fut-ineq-h / .fut-ineq-v),
   digit popup (.fut-digit-popup), size selector (.fut-size-btn), loading
   ========================================================================== */

/* Board wrapper — centers board, allows horizontal scroll on small screens */
.fut-board-wrapper {
  overflow-x: auto;
  display: flex;
  justify-content: center;
  padding: var(--space-4) 0;
}

.fut-board-actions {
  display: flex;
  gap: var(--space-3);
  justify-content: center;
  margin-top: var(--space-2);
}

#futoshiki-board {
  display: inline-grid;
  gap: 0;
  user-select: none;
}

/* Cells */
.fut-cell {
  width: 52px;
  height: 52px;
  border: 2px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  font-weight: 700;
  cursor: pointer;
  border-radius: var(--radius-md);
  background: var(--bg-section);
  transition: background 0.12s, border-color 0.12s;
  color: var(--text-main);
}
.fut-cell.given {
  background: var(--bg-section-soft);
  cursor: default;
  color: var(--text-main);
}
.fut-cell.user-filled { color: var(--accent-primary); }
.fut-cell.error {
  background: var(--color-error-bg);
  border-color: var(--color-error);
  color: var(--color-error);
}
.fut-cell.selected {
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 2px rgba(0, 126, 255, 0.2);
}
.fut-cell.revealed {
  color: var(--color-info);
  background: var(--color-info-bg);
  cursor: default;
}

/* Horizontal inequality signs (between cells in a row) */
.fut-ineq-h {
  width: 20px;
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--color-error);
}

/* Vertical inequality signs (between rows) */
.fut-ineq-v {
  height: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--color-error);
}

.fut-ineq-v.violated,
.fut-ineq-h.violated {
  color: var(--color-error-bg);
  text-shadow: 0 0 0 var(--color-error);
  opacity: 0.6;
}

/* Digit popup */
.fut-digit-popup {
  position: fixed;
  background: var(--bg-section);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: var(--space-2);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.12);
  display: flex;
  gap: var(--space-1);
  flex-wrap: wrap;
  max-width: 200px;
  z-index: 1500;
}

.fut-digit-btn {
  width: 36px;
  height: 36px;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  background: var(--bg-section-soft);
  color: var(--text-main);
  transition: background 0.12s, color 0.12s;
}
.fut-digit-btn:hover {
  background: var(--accent-primary);
  color: #fff;
  border-color: var(--accent-primary);
}

.fut-digit-clear {
  width: 36px;
  height: 36px;
  border: 1px solid var(--color-error);
  border-radius: var(--radius-md);
  background: var(--color-error-bg);
  color: var(--color-error);
  cursor: pointer;
  font-weight: 700;
  font-size: 0.9rem;
  transition: background 0.12s;
}
.fut-digit-clear:hover { background: var(--color-error); color: #fff; }

/* Board size selector row */
.fut-size-row {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-wrap: wrap;
  padding: var(--space-2) 0 var(--space-1);
}
.fut-size-label {
  font-size: var(--fs-sm);
  font-weight: 600;
  color: var(--text-soft);
  white-space: nowrap;
}
.fut-size-btns {
  display: flex;
  gap: var(--space-1);
  flex-wrap: wrap;
}
.fut-size-btn {
  padding: 4px 10px;
  border: 1.5px solid var(--border-subtle);
  border-radius: var(--radius-full);
  cursor: pointer;
  background: var(--bg-section-soft);
  font-size: var(--fs-xs);
  font-weight: 600;
  color: var(--text-soft);
  transition: background 0.12s, color 0.12s, border-color 0.12s;
}
.fut-size-btn:hover {
  border-color: var(--accent-primary);
  color: var(--accent-primary);
}
.fut-size-btn.active {
  background: var(--accent-primary);
  color: #fff;
  border-color: var(--accent-primary);
}

/* Loading text */
.fut-loading {
  text-align: center;
  padding: var(--space-8) var(--space-4);
  color: var(--accent-primary);
  font-weight: 600;
  font-size: var(--fs-base);
}

/* Mobile adjustments */
@media (max-width: 480px) {
  .fut-cell {
    width: 40px;
    height: 40px;
    font-size: 1.1rem;
  }
  .fut-ineq-h { width: 14px; height: 40px; font-size: 0.75rem; }
  .fut-ineq-v { height: 14px; font-size: 0.65rem; }
}

/* ==========================================================================
   42. GAME DAILY CHALLENGE BANNER (games listing page)
   ========================================================================== */

.game-dc-banner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  padding: 14px var(--space-4);
  border-radius: 15px;
  border: 1px solid var(--border-subtle);
  background: var(--bg-card);
  margin-bottom: var(--space-4);
  transition: all var(--transition-base);
}

.game-dc-banner:hover {
  transform: translateY(-2px);
  border-color: #06b6d4;
  box-shadow: 0 4px 16px rgba(6, 182, 212, 0.1);
}

.game-dc-left {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  min-width: 0;
}

.game-dc-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: linear-gradient(135deg, rgba(6,182,212,.15), rgba(99,102,241,.15));
  flex-shrink: 0;
}

.game-dc-icon .lucide {
  width: 20px;
  height: 20px;
  color: #06b6d4;
}

.game-dc-info {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
}

.game-dc-title {
  font-size: var(--fs-sm);
  font-weight: var(--fw-bold);
  color: var(--text-main);
  white-space: nowrap;
}

.game-dc-meta {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: var(--fs-xs);
  color: var(--text-soft);
}

.game-dc-diff {
  display: inline-block;
  padding: 1px 7px;
  border-radius: 20px;
  font-size: 10px;
  font-weight: var(--fw-bold);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.game-dc-diff-easy   { background: rgba(34,197,94,.15);  color: #16a34a; }
.game-dc-diff-medium { background: rgba(234,179,8,.15);  color: #b45309; }
.game-dc-diff-hard   { background: rgba(239,68,68,.15);  color: #dc2626; }

.game-dc-done {
  display: flex;
  align-items: flex-start;
  gap: 6px;
  flex-shrink: 0;
}

.game-dc-done .lucide {
  width: 18px;
  height: 18px;
  color: #22c55e;
  flex-shrink: 0;
  margin-top: 2px;
}

.game-dc-done-info {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.game-dc-done-score {
  font-size: var(--fs-sm);
  font-weight: var(--fw-semibold);
  color: #22c55e;
  white-space: nowrap;
}

.game-dc-next {
  font-size: var(--fs-xs);
  color: var(--text-soft);
  white-space: nowrap;
}

.game-dc-next strong {
  font-variant-numeric: tabular-nums;
  color: #a855f7;
}

.game-dc-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 18px;
  border-radius: 10px;
  background: linear-gradient(135deg, #06b6d4, #6366f1);
  color: #fff;
  font-size: var(--fs-sm);
  font-weight: var(--fw-semibold);
  text-decoration: none;
  flex-shrink: 0;
  transition: opacity var(--transition-base), transform var(--transition-base);
}

.game-dc-btn:hover {
  opacity: 0.88;
  transform: translateY(-1px);
}

.game-dc-btn .lucide { width: 15px; height: 15px; }

.game-dc-btn-guest {
  background: var(--btn-gradient);
  color: #ffffff;
  transition: var(--transition-base);
}

.game-dc-btn-guest:hover {
  opacity: 1;
  transform: translateY(-1px);
}

@media (max-width: 480px) {
  .game-dc-banner {
    flex-wrap: wrap;
    gap: var(--space-2);
  }
  .game-dc-btn {
    width: 100%;
    justify-content: center;
  }
  .game-dc-done { width: fit-content; }
}

/* ==========================================================================
   43. GAME DAILY CHALLENGE BADGE (individual game pages — injected by route)
   ========================================================================== */

.game-dc-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 10px 20px;
  background: linear-gradient(90deg, rgba(255,104,0,0.07) 0%, rgba(63,0,209,0.05) 100%);
  border: 1px solid rgba(255,104,0,0.25);
  border-radius: var(--radius-lg);
  font-size: var(--fs-sm);
  color: var(--text-primary);
  margin-top: var(--space-3);
  margin-bottom: var(--space-3);
  max-width: 100%;
}

.game-dc-badge svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  color: #ff6800;
}

.game-dc-badge strong { color: #ff6800; }

.game-dc-badge-done {
  background: linear-gradient(90deg, rgba(34,197,94,0.08) 0%, rgba(34,197,94,0.03) 100%);
  border-color: rgba(34,197,94,0.30);
}

.game-dc-badge-done svg { color: #22c55e; }

/* ==========================================================================
   44. GUEST CTA CARD (games index)
   ========================================================================== */

.games-guest-cta {
  margin: var(--space-8) 0;
}

.games-guest-cta-inner {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  padding: var(--space-6) var(--space-8);
  background: var(--glass-bg);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.games-guest-cta-icon {
  width: 56px;
  height: 56px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: linear-gradient(135deg, rgba(249,115,22,0.15), rgba(63,0,209,0.12));
  color: var(--accent-primary);
}

.games-guest-cta-icon svg { width: 28px; height: 28px; }

.games-guest-cta-text {
  flex: 1;
  min-width: 0;
}

.games-guest-cta-text h2 {
  font-size: var(--fs-lg);
  font-weight: 700;
  color: var(--text-primary);
  margin: 0 0 var(--space-1) 0;
}

.games-guest-cta-text p {
  font-size: var(--fs-sm);
  color: var(--text-secondary);
  margin: 0;
  line-height: 1.5;
}

.games-guest-cta-actions {
  display: flex;
  gap: var(--space-3);
  flex-shrink: 0;
}

@media (max-width: 768px) {
  .games-guest-cta-inner {
    flex-direction: column;
    text-align: center;
    padding: var(--space-5) var(--space-4);
    gap: var(--space-4);
  }
  .games-guest-cta-actions {
    width: 100%;
    justify-content: center;
  }
}