/* ============================================================================
   ESCOBA GAME UI - COMPLETE STYLING
   Responsive design, animations, and accessibility
   ============================================================================ */

/* =============================================================================
   ROOT VARIABLES & BASE STYLES
   ============================================================================= */

:root {
  /* Color Palette */
  --color-primary: #2d5a3d;
  --color-primary-light: #3d7a4d;
  --color-primary-dark: #1a3a2a;
  --color-accent: #4a9d6f;
  --color-accent-light: #6fbb8f;

  --color-easy: #4caf50;
  --color-medium: #2196f3;
  --color-hard: #f44336;
  --color-challenge: #9c27b0;

  --color-text: #e0e0e0;
  --color-text-dark: #1a1a1a;
  --color-border: #2d5a3d;
  --color-background: #1a3a2a;
  --color-surface: #0f1f1a;

  /* Spacing */
  --spacing-xs: 2px;
  --spacing-sm: 4px;
  --spacing-md: 8px;
  --spacing-lg: 12px;
  --spacing-xl: 16px;

  /* Typography */
  --font-family:
    -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu,
    Cantarell, sans-serif;
  --font-size-xs: 8px;
  --font-size-sm: 10px;
  --font-size-base: 12px;
  --font-size-lg: 16px;
  --font-size-xl: 18px;
  --font-size-2xl: 22px;
  --font-size-3xl: 24px;

  /* Animations */
  --transition-fast: 150ms ease-out;
  --transition-base: 300ms ease-out;
  --transition-slow: 500ms ease-out;

  /* Card sizes */
  --card-aspect-ratio: 5 / 8;
  --card-width: 75px;
  --card-height: calc(var(--card-width) * 8 / 5);
  --card-width-lg: 113px;
  --card-height-lg: 180px;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  background: linear-gradient(135deg, var(--color-background) 0%, #0d2b1f 100%);
  color: var(--color-text);
  line-height: 1.6;
  min-height: 100vh;
}

/* =============================================================================
   GAME CONTAINER & LAYOUT
   ============================================================================= */

#app {
  max-width: 1400px;
  margin: 0 auto;
  padding: 4px;
}

/* =============================================================================
   CARD STYLES
   ============================================================================= */

.card-element {
  position: relative;
  display: inline-block;
  border-radius: 1px;
  overflow: hidden;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
  transition:
    transform var(--transition-base),
    box-shadow var(--transition-base),
    filter var(--transition-base);
}

.card-image {
  width: var(--card-width);
  height: var(--card-height);
  display: block;
  object-fit: cover;
  pointer-events: none;
  user-select: none;
}

/* Clickable cards */
.card-clickable {
  cursor: pointer;
  user-select: none;
}

.card-clickable:hover {
  transform: translateY(-8px);
  box-shadow: 0 8px 16px rgba(74, 157, 111, 0.4);
  filter: brightness(1.1);
}

.card-clickable:focus {
  outline: 3px solid var(--color-accent);
  outline-offset: 2px;
}

/* Selected card state */
.card-selected {
  box-shadow:
    0 0 0 3px var(--color-accent),
    0 -2px 0 3px var(--color-accent),
    0 2px 0 3px var(--color-accent),
    0 4px 12px rgba(74, 157, 111, 0.6);
  transform: translateY(-12px) scale(1.05);
}

.card-selected:hover {
  box-shadow:
    0 0 0 3px var(--color-accent),
    0 -2px 0 3px var(--color-accent),
    0 2px 0 3px var(--color-accent),
    0 8px 20px rgba(74, 157, 111, 0.8);
  transform: translateY(-14px) scale(1.08);
}

/* Capture preview highlight uses the same visual language as user selection */
.capture-preview-highlight {
  box-shadow:
    0 0 0 3px var(--color-accent),
    0 -2px 0 3px var(--color-accent),
    0 2px 0 3px var(--color-accent),
    0 8px 20px rgba(74, 157, 111, 0.8);
  transform: translateY(-14px) scale(1.08);
}

/* Captured card display (smaller) */
.captured-card-display .card-image {
  width: 60px;
  height: 90px;
  opacity: 0.8;
}

/* =============================================================================
   GAME BOARD LAYOUT
   ============================================================================= */

.game-board {
  display: flex;
  flex-direction: column;
  gap: 4px;
  animation: fadeIn var(--transition-slow);
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* =============================================================================
   GAME HEADER
   ============================================================================= */

.game-header {
  background: linear-gradient(
    135deg,
    var(--color-primary) 0%,
    var(--color-primary-light) 100%
  );
  border: 2px solid var(--color-accent);
  border-radius: 12px;
  padding: var(--spacing-md);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
  display: grid;
  grid-template-columns: 1fr auto;
  gap: var(--spacing-lg);
  align-items: center;
}

.header-title {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  margin: 0;
}

.header-title h1 {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  margin: 0;
}

.turn-info {
  background: rgba(0, 0, 0, 0.2);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: 8px;
  font-size: var(--font-size-sm);
}

.turn-info strong {
  color: var(--color-accent-light);
  animation: pulse 1s ease-in-out infinite;
}

@keyframes pulse {
  0%,
  100% {
    opacity: 1;
  }
  50% {
    opacity: 0.7;
  }
}

.score-section {
  display: flex;
  gap: var(--spacing-md);
  align-items: center;
}

.score-player {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
  padding: var(--spacing-sm) var(--spacing-md);
  background: rgba(0, 0, 0, 0.2);
  border-radius: 8px;
  text-align: center;
  min-width: 80px;
}

.score-label {
  font-size: var(--font-size-xs);
  opacity: 0.9;
}

.score-value {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--color-accent-light);
}

.score-label {
  font-size: var(--font-size-sm);
  opacity: 0.9;
}

.score-value {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  color: var(--color-accent-light);
}

.score-bar {
  display: none;
  height: 30px;
  background: rgba(0, 0, 0, 0.3);
  border-radius: 15px;
  overflow: hidden;
  border: 2px solid var(--color-border);
}

.score-bar-fill {
  height: 100%;
  background: linear-gradient(
    90deg,
    var(--color-accent) 0%,
    var(--color-accent-light) 100%
  );
  transition: width var(--transition-slow);
}

/* =============================================================================
   GAME AREA LAYOUT
   ============================================================================= */

.game-area {
  display: grid;
  grid-template-columns: 1fr;
  gap: 4px;
}

/* Central game board (left side) */
.game-board-center {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

/* Opponent area - condensed (kept for compatibility) */
.opponent-area,
.player-area-north,
.player-area-south {
  background: var(--color-surface);
  border: 2px solid var(--color-border);
  border-radius: 12px;
  padding: var(--spacing-sm) var(--spacing-md);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.player-area-label {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: var(--spacing-xs);
}

.pa-name {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-accent-light);
  margin-right: 4px;
}

.pa-badge {
  display: inline-flex;
  align-items: center;
  gap: 3px;
  padding: 2px 9px;
  border-radius: 12px;
  font-size: 0.8rem;
  font-weight: 500;
  line-height: 1.6;
}

.pa-dealer {
  background: rgba(187, 94, 43, 0.2);
  border: 1px solid #c06a36;
  color: #ffd9c2;
}
.pa-captured {
  background: rgba(74, 120, 180, 0.15);
  border: 1px solid #3a5a9a;
  color: #b3d4f0;
}
.pa-escobas {
  background: rgba(180, 140, 30, 0.15);
  border: 1px solid #8a6a1a;
  color: #ffe082;
}

/* AI player panels: ultra-compact single-liner */
.player-area.player-type-ai {
  padding: 2px 8px;
  gap: 0;
  min-height: auto;
}

.player-area.player-type-human {
  padding: var(--spacing-sm) var(--spacing-md);
  gap: var(--spacing-xs);
}

/* AI hand: just a count badge */
.ai-hand-count {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 6px 18px;
  background: rgba(74, 157, 111, 0.15);
  border: 1px solid var(--color-border);
  border-radius: 20px;
  font-size: var(--font-size-sm);
  color: var(--color-accent-light);
  font-style: italic;
}

/* Face-down cards */
.card-back {
  cursor: default;
  opacity: 0.85;
}

.card-back .card-image {
  filter: brightness(0.7) saturate(0.4);
}

/* Play area (table) - optimized */
.play-area {
  background: linear-gradient(135deg, var(--color-surface) 0%, #0a1f18 100%);
  border: 3px dashed var(--color-accent);
  border-radius: 12px;
  padding: 4px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.table-section {
  text-align: center;
  width: 100%;
}

.table-section h2 {
  font-size: var(--font-size-xl);
  margin-bottom: var(--spacing-md);
  color: var(--color-accent-light);
}

.play-area-instruction {
  font-size: var(--font-size-sm);
  color: var(--color-accent-light);
  opacity: 0.8;
  margin-bottom: 2px;
  font-style: italic;
  padding: var(--spacing-xs) var(--spacing-sm);
  background: rgba(74, 157, 111, 0.1);
  border-radius: 6px;
}

.play-area-status-info {
  border-left: 3px solid var(--color-accent);
}

.play-area-status-success {
  border-left: 3px solid #63cf8b;
  color: #d7ffe7;
  background: rgba(55, 120, 78, 0.35);
}

.play-area-status-error {
  border-left: 3px solid #ff6b6b;
  color: #ffd9d9;
  background: rgba(120, 42, 42, 0.35);
}

.table-cards {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-md);
  justify-content: center;
  align-items: center;
}

.table-container {
  display: flex;
  gap: 32px;
  justify-content: center;
  align-items: center;
  width: 100%;
}

.deck-pile {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.deck-back {
  width: var(--card-width);
  height: var(--card-height);
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
  display: block;
}

.deck-count {
  position: absolute;
  top: -12px;
  left: -12px;
  background: rgba(74, 157, 111, 0.9);
  color: var(--color-text);
  padding: 4px 8px;
  border-radius: 4px;
  font-size: var(--font-size-sm);
  font-weight: 600;
  min-width: 30px;
  text-align: center;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.table-empty {
  font-size: var(--font-size-lg);
  opacity: 0.6;
  font-style: italic;
}

/* Player area - optimized */
.player-area {
  background: var(--color-surface);
  border: 2px solid var(--color-border);
  border-radius: 12px;
  padding: var(--spacing-md);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.hand-section {
  flex: 1;
}

.hand-section h2 {
  font-size: var(--font-size-base);
  margin-bottom: var(--spacing-sm);
  color: var(--color-accent-light);
}

.player-hand {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--spacing-md);
  padding: var(--spacing-md);
  background: rgba(0, 0, 0, 0.2);
  border-radius: 8px;
  align-content: flex-start;
}

.hand-empty {
  width: 100%;
  text-align: center;
  opacity: 0.6;
  font-style: italic;
}

/* Captured area - condensed */
.captured-area {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.captured-label {
  font-size: var(--font-size-xs);
  font-weight: 600;
  opacity: 0.9;
  text-align: center;
}

.captured-cards {
  display: flex;
  gap: var(--spacing-xs);
  flex-wrap: wrap;
  justify-content: center;
  background: rgba(0, 0, 0, 0.2);
  padding: var(--spacing-sm);
  border-radius: 8px;
  min-height: 60px;
  align-content: center;
  position: relative;
}

.more-cards-badge {
  position: absolute;
  bottom: 8px;
  right: 8px;
  background: var(--color-accent);
  color: var(--color-text-dark);
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: var(--font-size-sm);
}

/* =============================================================================
   GAME CONTROLS
   ============================================================================= */

.game-controls {
  background: var(--color-surface);
  border: 2px solid var(--color-border);
  border-radius: 12px;
  padding: 4px;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: var(--spacing-lg);
  align-items: center;
}

.selected-info {
  font-size: var(--font-size-lg);
  color: var(--color-accent-light);
}

.control-buttons {
  display: flex;
  gap: var(--spacing-md);
  flex-wrap: wrap;
}

.btn {
  padding: var(--spacing-md) var(--spacing-lg);
  border: none;
  border-radius: 8px;
  font-size: var(--font-size-base);
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-base);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  min-width: 120px;
}

.btn:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.btn:active:not(:disabled) {
  transform: translateY(0);
}

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

.btn-primary {
  background: linear-gradient(
    135deg,
    var(--color-accent) 0%,
    var(--color-accent-light) 100%
  );
  color: var(--color-text-dark);
}

.btn-secondary {
  background: transparent;
  border: 2px solid var(--color-border);
  color: var(--color-text);
}

.btn-secondary:hover:not(:disabled) {
  background: rgba(74, 157, 111, 0.1);
}

.btn-warning {
  background: linear-gradient(135deg, #ff9800 0%, #ffb74d 100%);
  color: var(--color-text-dark);
}

/* =============================================================================
   DIFFICULTY SELECTOR
   ============================================================================= */

.difficulty-selector {
  background: linear-gradient(
    135deg,
    var(--color-primary) 0%,
    var(--color-primary-light) 100%
  );
  border: 2px solid var(--color-accent);
  border-radius: 16px;
  padding: var(--spacing-xl);
  text-align: center;
  animation: slideUp var(--transition-slow);
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(40px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.difficulty-heading {
  font-size: var(--font-size-3xl);
  margin-bottom: var(--spacing-md);
  color: var(--color-accent-light);
}

.difficulty-subtitle {
  font-size: var(--font-size-lg);
  opacity: 0.9;
  margin-bottom: var(--spacing-xl);
}

.difficulty-options {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-xl);
}

.difficulty-button {
  background: var(--color-surface);
  border: 2px solid currentColor;
  border-radius: 12px;
  padding: var(--spacing-lg);
  cursor: pointer;
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
  font-size: var(--font-size-base);
  color: var(--color-text);
}

.difficulty-button::before {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: inherit;
  opacity: 0.1;
  transition: left var(--transition-base);
  z-index: -1;
}

.difficulty-button:hover::before {
  left: 0;
}

.difficulty-button:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 16px rgba(0, 0, 0, 0.3);
}

.difficulty-button-content {
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
  text-align: left;
}

.difficulty-emoji {
  font-size: 2.5rem;
  flex-shrink: 0;
}

.difficulty-info-box h3 {
  font-size: var(--font-size-lg);
  margin-bottom: var(--spacing-sm);
  font-weight: 700;
}

.difficulty-description {
  font-size: var(--font-size-sm);
  opacity: 0.9;
  margin-bottom: var(--spacing-sm);
}

.difficulty-winrate {
  font-size: var(--font-size-sm);
  color: var(--color-accent-light);
  font-weight: 600;
}

.difficulty-badge {
  position: absolute;
  top: 8px;
  right: 8px;
  background: linear-gradient(135deg, #ffd700 0%, #ffed4e 100%);
  color: var(--color-text-dark);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: 20px;
  font-size: var(--font-size-sm);
  font-weight: 700;
  text-transform: uppercase;
}

.difficulty-green {
  border-color: var(--color-easy);
}

.difficulty-green:hover {
  background: rgba(76, 175, 80, 0.1);
}

.difficulty-blue {
  border-color: var(--color-medium);
}

.difficulty-blue:hover {
  background: rgba(33, 150, 243, 0.1);
}

.difficulty-red {
  border-color: var(--color-hard);
}

.difficulty-red:hover {
  background: rgba(244, 67, 54, 0.1);
}

.difficulty-purple {
  border-color: var(--color-challenge);
}

.difficulty-purple:hover {
  background: rgba(156, 39, 176, 0.1);
}

.difficulty-recommended {
  box-shadow:
    0 0 0 2px var(--color-accent),
    inset 0 0 0 1px var(--color-accent);
}

.difficulty-selected {
  box-shadow:
    0 0 0 3px #f0c040,
    inset 0 0 0 1px #f0c040;
  outline: none;
}

.difficulty-info {
  background: rgba(0, 0, 0, 0.2);
  padding: var(--spacing-lg);
  border-radius: 8px;
  font-size: var(--font-size-sm);
  line-height: 1.8;
}

.difficulty-info p {
  margin-bottom: var(--spacing-sm);
}

/* =============================================================================
   STATISTICS PANEL
   ============================================================================= */

.statistics-panel {
  background: linear-gradient(
    135deg,
    var(--color-primary) 0%,
    var(--color-primary-light) 100%
  );
  border: 2px solid var(--color-accent);
  border-radius: 16px;
  padding: var(--spacing-xl);
  animation: fadeIn var(--transition-slow);
}

.stats-heading {
  font-size: var(--font-size-2xl);
  margin-bottom: var(--spacing-lg);
  text-align: center;
  color: var(--color-accent-light);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
}

.stats-card {
  background: var(--color-surface);
  border-left: 4px solid currentColor;
  border-radius: 8px;
  padding: var(--spacing-lg);
  transition: transform var(--transition-base);
}

.stats-card:hover {
  transform: translateY(-4px);
}

.stats-card h4 {
  font-size: var(--font-size-lg);
  margin-bottom: var(--spacing-md);
  font-weight: 700;
}

.stat-item {
  display: flex;
  justify-content: space-between;
  padding: var(--spacing-sm) 0;
  font-size: var(--font-size-base);
  border-bottom: 1px solid rgba(224, 224, 224, 0.1);
}

.stat-item:last-child {
  border-bottom: none;
}

.stat-label {
  opacity: 0.9;
}

.stat-value {
  font-weight: 700;
  color: var(--color-accent-light);
}

.stats-easy {
  border-left-color: var(--color-easy);
}

.stats-medium {
  border-left-color: var(--color-medium);
}

.stats-hard {
  border-left-color: var(--color-hard);
}

.stats-challenge {
  border-left-color: var(--color-challenge);
}

.stats-reset-btn {
  width: 100%;
  padding: var(--spacing-md) var(--spacing-lg);
  background: transparent;
  border: 2px solid var(--color-border);
  color: var(--color-text);
  border-radius: 8px;
  cursor: pointer;
  font-size: var(--font-size-base);
  transition: all var(--transition-base);
  text-transform: uppercase;
  font-weight: 600;
  letter-spacing: 0.5px;
}

.stats-reset-btn:hover {
  background: rgba(244, 67, 54, 0.1);
  border-color: var(--color-hard);
  color: var(--color-hard);
}

/* =============================================================================
   RESPONSIVE DESIGN
   ============================================================================= */

@media (max-width: 1200px) {
  :root {
    --card-width: 70px;
  }

  .game-header {
    padding: var(--spacing-md);
  }

  .header-title {
    gap: var(--spacing-md);
  }

  .header-title h1 {
    font-size: var(--font-size-2xl);
  }

  .score-section {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  :root {
    --card-width: 64px;
    --spacing-lg: 16px;
  }

  #app {
    padding: var(--spacing-sm);
  }

  .game-area {
    grid-template-columns: 1fr;
    grid-template-rows: auto auto auto;
  }

  .opponent-area {
    flex-direction: row;
    gap: var(--spacing-md);
  }

  .opponent-captured {
    flex-direction: row;
  }

  .player-area {
    flex-direction: column;
  }

  .play-area {
    min-height: clamp(132px, 24vh, 168px);
    padding: 4px;
  }

  .game-controls {
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
  }

  .control-buttons {
    width: 100%;
  }

  .btn {
    flex: 1;
  }

  .difficulty-options {
    grid-template-columns: 1fr;
  }

  .score-bar {
    display: none;
  }

  .table-cards {
    gap: var(--spacing-sm);
  }

  .player-hand {
    gap: var(--spacing-sm);
  }
}

@media (max-height: 520px) and (orientation: landscape) {
  :root {
    --card-width: 54px;
  }

  #app {
    padding: 2px;
  }

  .game-board {
    gap: 2px;
  }

  .game-board-center {
    gap: 4px;
  }

  .player-area {
    padding: 2px 4px;
    gap: 2px;
  }

  .player-area-label {
    gap: 4px;
  }

  .pa-badge {
    padding: 1px 6px;
    font-size: 0.72rem;
  }

  .play-area {
    min-height: clamp(92px, 26vh, 116px);
    padding: 2px;
    border-width: 2px;
  }

  .play-area-instruction {
    font-size: 9px;
    padding: 1px 4px;
  }

  .table-container {
    gap: 14px;
  }

  .game-controls {
    gap: 4px;
    padding: 2px;
  }

  .btn {
    min-width: 88px;
    padding: 6px 10px;
    font-size: 10px;
  }
}

@media (min-width: 700px) and (max-width: 1024px) and (orientation: portrait) {
  :root {
    --card-width: 72px;
  }

  .game-area {
    min-height: auto;
  }

  .play-area {
    min-height: clamp(138px, 20vh, 164px);
  }

  .game-controls {
    gap: 6px;
    padding: 3px;
  }
}

@media (max-width: 480px) {
  :root {
    --card-width: 52px;
    --font-size-3xl: 24px;
    --font-size-2xl: 18px;
  }

  .header-title {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--spacing-sm);
  }

  .header-title h1 {
    font-size: var(--font-size-2xl);
  }

  .turn-info {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-size-base);
  }

  .game-header {
    padding: var(--spacing-md);
  }

  .score-player {
    padding: var(--spacing-sm);
  }

  .control-buttons {
    flex-direction: column;
  }

  .btn {
    width: 100%;
    padding: var(--spacing-md);
    font-size: var(--font-size-sm);
  }

  .difficulty-button-content {
    gap: var(--spacing-md);
    flex-direction: column;
    text-align: center;
  }

  .difficulty-emoji {
    font-size: 2rem;
  }

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

/* =============================================================================
   ACCESSIBILITY & KEYBOARD NAVIGATION
   ============================================================================= */

.btn:focus-visible,
.difficulty-button:focus-visible,
.card-clickable:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 2px;
}

/* Hide focus outline for mouse users */
.btn:focus:not(:focus-visible),
.difficulty-button:focus:not(:focus-visible),
.card-clickable:focus:not(:focus-visible) {
  outline: none;
}

/* Reduce motion for users who prefer it */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms;
    animation-iteration-count: 1;
    transition-duration: 0.01ms;
    scroll-behavior: auto;
  }
}

/* High contrast mode */
@media (prefers-contrast: more) {
  .card-element {
    border: 2px solid var(--color-text);
  }

  .btn {
    border: 2px solid var(--color-text);
  }
}

/* Dark mode (already dark by default, but respecting preference) */
@media (prefers-color-scheme: dark) {
  /* Already styled for dark mode */
}

/* =============================================================================
   PRINT STYLES
   ============================================================================= */

@media print {
  body {
    background: white;
    color: black;
  }

  .game-board,
  .difficulty-selector,
  .statistics-panel {
    break-inside: avoid;
    page-break-inside: avoid;
  }
}