/* ============================================================
   麻将听牌分析器 - 翡翠牌桌 (Jade Mahjong Table) Theme
   ============================================================ */

/* ---- CSS Custom Properties ---- */
:root {
  --bg-deep: #0a1a10;
  --bg-surface: #0f2d1a;
  --glass-bg: rgba(255, 255, 255, 0.06);
  --glass-border: rgba(255, 255, 255, 0.1);
  --glass-blur: 12px;

  --accent-jade: #00d4aa;
  --accent-jade-dim: rgba(0, 212, 170, 0.25);
  --accent-gold: #d4a574;
  --accent-gold-dim: rgba(212, 165, 116, 0.2);
  --danger: #e74c3c;
  --danger-dim: rgba(231, 76, 60, 0.2);

  --text-primary: #e8e6e0;
  --text-secondary: rgba(255, 255, 255, 0.6);
  --text-muted: rgba(255, 255, 255, 0.35);

  --tile-ivory: #f5f0e4;
  --tile-ivory-mid: #e8dfd0;
  --tile-ivory-dark: #ddd4c4;
  --tile-shadow-1: #c8b89a;
  --tile-shadow-2: #b8a888;
  --tile-border: rgba(180, 170, 150, 0.5);

  --suit-wan: #c41e3a;
  --suit-tiao: #1a8a3a;
  --suit-tong: #1a5a9a;
  --honor-feng: #1a1a2e;
  --honor-zhong: #c41e3a;
  --honor-fa: #1a8a3a;
  --honor-bai: #4a6a8a;

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;

  --font-family: 'Noto Sans SC', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;

  --max-width: 480px;
  --transition-fast: 0.15s ease;
  --transition-med: 0.25s ease;
  --transition-slow: 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

/* ---- Reset & Base ---- */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  -webkit-tap-highlight-color: transparent;
}

body {
  font-family: var(--font-family);
  background: var(--bg-deep);
  background-image:
    radial-gradient(ellipse at 50% 0%, var(--bg-surface) 0%, var(--bg-deep) 70%),
    radial-gradient(ellipse at 80% 100%, rgba(0, 80, 40, 0.15) 0%, transparent 50%),
    radial-gradient(ellipse at 20% 80%, rgba(0, 60, 30, 0.1) 0%, transparent 40%);
  color: var(--text-primary);
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Subtle felt texture overlay */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg width='60' height='60' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.65' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.03'/%3E%3C/svg%3E");
  pointer-events: none;
  z-index: 0;
}

/* ---- Scrollbar ---- */
::-webkit-scrollbar {
  width: 4px;
}
::-webkit-scrollbar-track {
  background: transparent;
}
::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.15);
  border-radius: 2px;
}

/* ---- Utility ---- */
.hidden {
  display: none !important;
}

/* ---- Header ---- */
#app-header {
  text-align: center;
  padding: 28px 16px 12px;
  position: relative;
  z-index: 1;
}

#app-header h1 {
  font-size: 1.65rem;
  font-weight: 900;
  letter-spacing: 0.02em;
  background: linear-gradient(135deg, #00d4aa 0%, #7becc8 40%, #d4a574 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1.3;
}

#app-header .subtitle {
  font-size: 0.8rem;
  color: var(--text-secondary);
  font-weight: 500;
  margin-top: 4px;
  letter-spacing: 0.15em;
}

/* ---- Main ---- */
#app-main {
  flex: 1;
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 12px 24px;
  position: relative;
  z-index: 1;
  overflow-y: auto;
}

/* ---- Footer ---- */
#app-footer {
  text-align: center;
  padding: 16px;
  position: relative;
  z-index: 1;
}

#app-footer p {
  font-size: 0.7rem;
  color: var(--text-muted);
  letter-spacing: 0.1em;
}

/* ============================================================
   Glass Panel
   ============================================================ */
.glass-panel {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 20px;
  margin-bottom: 16px;
  transition: border-color var(--transition-med);
}

.glass-panel:hover {
  border-color: rgba(255, 255, 255, 0.14);
}

/* ============================================================
   Section Header
   ============================================================ */
.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
}

.section-header h2 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
}

/* ---- Badge ---- */
.badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.72rem;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 20px;
  background: var(--accent-jade-dim);
  color: var(--accent-jade);
  min-width: 42px;
}

.badge.warning {
  background: var(--accent-gold-dim);
  color: var(--accent-gold);
}

.badge.danger {
  background: var(--danger-dim);
  color: var(--danger);
}

/* ============================================================
   Mode Toggle
   ============================================================ */
#input-mode-toggle {
  display: flex;
  gap: 8px;
  padding: 8px;
}

.mode-btn {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 10px 12px;
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  background: transparent;
  color: var(--text-secondary);
  font-family: var(--font-family);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-med);
  user-select: none;
  -webkit-user-select: none;
}

.mode-btn:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.04);
}

.mode-btn.active {
  background: var(--accent-jade-dim);
  color: var(--accent-jade);
  border-color: rgba(0, 212, 170, 0.3);
}

/* ============================================================
   Action Buttons
   ============================================================ */
.action-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 10px 20px;
  border: none;
  border-radius: var(--radius-md);
  font-family: var(--font-family);
  font-size: 0.85rem;
  font-weight: 700;
  cursor: pointer;
  transition: all var(--transition-fast);
  user-select: none;
  -webkit-user-select: none;
  position: relative;
  overflow: hidden;
}

.action-btn::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(255,255,255,0.1) 0%, transparent 50%);
  pointer-events: none;
}

/* Primary - Jade Green */
.action-btn.primary {
  background: linear-gradient(135deg, #00c49a 0%, #00a87a 100%);
  color: #fff;
  box-shadow: 0 4px 15px rgba(0, 196, 154, 0.3), inset 0 1px 0 rgba(255,255,255,0.2);
}

.action-btn.primary:hover:not(:disabled) {
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(0, 196, 154, 0.4), inset 0 1px 0 rgba(255,255,255,0.2);
}

.action-btn.primary:active:not(:disabled) {
  transform: translateY(0);
  box-shadow: 0 2px 8px rgba(0, 196, 154, 0.2);
}

/* Danger - Red */
.action-btn.danger {
  background: linear-gradient(135deg, #e74c3c 0%, #c0392b 100%);
  color: #fff;
  box-shadow: 0 4px 15px rgba(231, 76, 60, 0.25), inset 0 1px 0 rgba(255,255,255,0.15);
}

.action-btn.danger:hover:not(:disabled) {
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(231, 76, 60, 0.35);
}

/* Secondary - Outlined */
.action-btn.secondary {
  background: rgba(255, 255, 255, 0.06);
  color: var(--text-primary);
  border: 1px solid var(--glass-border);
}

.action-btn.secondary:hover:not(:disabled) {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.2);
}

/* Disabled */
.action-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
  transform: none !important;
}

/* ============================================================
   Mahjong Tiles
   ============================================================ */
.mj-tile {
  width: 44px;
  height: 60px;
  background: linear-gradient(145deg, var(--tile-ivory) 0%, var(--tile-ivory-mid) 50%, var(--tile-ivory-dark) 100%);
  border-radius: 6px;
  border: 1px solid var(--tile-border);
  box-shadow:
    0 2px 0 var(--tile-shadow-1),
    0 3px 0 var(--tile-shadow-2),
    0 4px 8px rgba(0, 0, 0, 0.3),
    inset 0 1px 0 rgba(255, 255, 255, 0.6);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
  user-select: none;
  -webkit-user-select: none;
  position: relative;
  font-family: var(--font-family);
  flex-shrink: 0;
}

.mj-tile:hover {
  transform: translateY(-3px);
  box-shadow:
    0 5px 0 var(--tile-shadow-1),
    0 6px 0 var(--tile-shadow-2),
    0 8px 16px rgba(0, 0, 0, 0.35),
    inset 0 1px 0 rgba(255, 255, 255, 0.6);
}

.mj-tile:active {
  transform: translateY(1px);
  box-shadow:
    0 1px 0 var(--tile-shadow-1),
    0 2px 4px rgba(0, 0, 0, 0.2),
    inset 0 1px 0 rgba(255, 255, 255, 0.6);
}

.mj-tile.selected {
  box-shadow:
    0 0 0 2px var(--accent-jade),
    0 2px 0 var(--tile-shadow-1),
    0 4px 8px rgba(0, 0, 0, 0.3),
    inset 0 1px 0 rgba(255, 255, 255, 0.6);
}

/* Tile text */
.mj-tile .tile-num {
  font-size: 20px;
  font-weight: 900;
  line-height: 1;
}

.mj-tile .tile-suit {
  font-size: 11px;
  font-weight: 700;
  line-height: 1;
  margin-top: 1px;
}

/* Suit colors */
.mj-tile.wan .tile-num,
.mj-tile.wan .tile-suit {
  color: var(--suit-wan);
}

.mj-tile.tiao .tile-num,
.mj-tile.tiao .tile-suit {
  color: var(--suit-tiao);
}

.mj-tile.tong .tile-num,
.mj-tile.tong .tile-suit {
  color: var(--suit-tong);
}

.mj-tile.feng .tile-num {
  color: var(--honor-feng);
  font-size: 22px;
}

.mj-tile.zhong .tile-num {
  color: var(--honor-zhong);
  font-size: 22px;
}

.mj-tile.fa .tile-num {
  color: var(--honor-fa);
  font-size: 22px;
}

.mj-tile.bai .tile-num {
  color: var(--honor-bai);
  font-size: 22px;
}

/* Wild tile (红中) glow */
.mj-tile.wild {
  box-shadow:
    0 0 8px rgba(196, 30, 58, 0.4),
    0 0 20px rgba(196, 30, 58, 0.15),
    0 2px 0 var(--tile-shadow-1),
    0 3px 0 var(--tile-shadow-2),
    0 4px 8px rgba(0, 0, 0, 0.3),
    inset 0 1px 0 rgba(255, 255, 255, 0.6);
}

.mj-tile.wild:hover {
  box-shadow:
    0 0 12px rgba(196, 30, 58, 0.55),
    0 0 28px rgba(196, 30, 58, 0.2),
    0 5px 0 var(--tile-shadow-1),
    0 6px 0 var(--tile-shadow-2),
    0 8px 16px rgba(0, 0, 0, 0.35),
    inset 0 1px 0 rgba(255, 255, 255, 0.6);
}

/* Wild badge */
.mj-tile .wild-badge {
  position: absolute;
  top: -6px;
  right: -6px;
  background: linear-gradient(135deg, #ff4444 0%, #cc0033 100%);
  color: #fff;
  font-size: 8px;
  font-weight: 900;
  padding: 1px 4px;
  border-radius: 6px;
  line-height: 1.3;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.3);
  letter-spacing: 0.02em;
}

/* ---- Tile size variants ---- */
/* Small (selector panel) */
.mj-tile.sm {
  width: 36px;
  height: 48px;
}

.mj-tile.sm .tile-num {
  font-size: 16px;
}

.mj-tile.sm .tile-suit {
  font-size: 9px;
}

.mj-tile.sm.feng .tile-num,
.mj-tile.sm.zhong .tile-num,
.mj-tile.sm.fa .tile-num,
.mj-tile.sm.bai .tile-num {
  font-size: 18px;
}

/* Large (result highlights) */
.mj-tile.lg {
  width: 52px;
  height: 72px;
}

.mj-tile.lg .tile-num {
  font-size: 24px;
}

.mj-tile.lg .tile-suit {
  font-size: 13px;
}

.mj-tile.lg.feng .tile-num,
.mj-tile.lg.zhong .tile-num,
.mj-tile.lg.fa .tile-num,
.mj-tile.lg.bai .tile-num {
  font-size: 26px;
}

/* ---- Tile count badge ---- */
.tile-count-badge {
  position: absolute;
  bottom: -4px;
  right: -4px;
  background: rgba(0, 0, 0, 0.7);
  color: #fff;
  font-size: 9px;
  font-weight: 700;
  min-width: 16px;
  height: 16px;
  padding: 0 3px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
  backdrop-filter: blur(4px);
  border: 1px solid rgba(255, 255, 255, 0.15);
}

.tile-count-badge.empty {
  background: rgba(231, 76, 60, 0.7);
}

/* ---- Tile disabled state (used up) ---- */
.mj-tile.exhausted {
  opacity: 0.3;
  cursor: not-allowed;
  pointer-events: none;
}

/* ============================================================
   Tile Containers
   ============================================================ */
.tile-row {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  justify-content: center;
  align-items: flex-end;
  min-height: 64px;
  padding: 8px 0;
}

.tile-row:empty::after {
  content: '点击下方牌面添加手牌';
  color: var(--text-muted);
  font-size: 0.8rem;
  display: flex;
  align-items: center;
  justify-content: center;
  height: 60px;
  width: 100%;
}

/* ---- Tile Grid (selector) ---- */
.tile-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  justify-content: center;
}

/* Suit section label */
.suit-label {
  width: 100%;
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--text-secondary);
  padding: 6px 0 4px;
  text-align: center;
  letter-spacing: 0.15em;
}

.suit-label:first-child {
  padding-top: 0;
}

.suit-divider {
  width: 100%;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.08), transparent);
  margin: 4px 0;
}

/* ============================================================
   Hand Section
   ============================================================ */
#hand-section {
  position: relative;
}

#hand-actions {
  display: flex;
  gap: 10px;
  margin-top: 14px;
}

#hand-actions .action-btn {
  flex: 1;
}

#btn-clear {
  flex: 0.4 !important;
}

/* ============================================================
   Camera Section
   ============================================================ */
#camera-container {
  position: relative;
  width: 100%;
  aspect-ratio: 4 / 3;
  background: #000;
  border-radius: var(--radius-md);
  overflow: hidden;
  margin-bottom: 12px;
}

#camera-video {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

#camera-canvas {
  display: none;
}

/* Camera guide overlay */
#camera-container::after {
  content: '';
  position: absolute;
  inset: 15%;
  border: 2px dashed rgba(0, 212, 170, 0.4);
  border-radius: var(--radius-sm);
  pointer-events: none;
}

#camera-controls {
  display: flex;
  gap: 10px;
  margin-bottom: 12px;
}

#camera-controls .action-btn {
  flex: 1;
}

#btn-capture {
  background: linear-gradient(135deg, #00c49a 0%, #00a87a 100%);
  color: #fff;
  box-shadow: 0 4px 15px rgba(0, 196, 154, 0.3);
}

#recognition-status {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 12px;
  background: var(--glass-bg);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-size: 0.85rem;
}

/* ---- Model status banner ---- */
.model-status {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 12px;
  margin-bottom: 12px;
  border-radius: var(--radius-md);
  font-size: 0.82rem;
  line-height: 1.4;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  color: var(--text-secondary);
}

.model-status.loading { border-color: rgba(255, 255, 255, 0.15); }
.model-status.ok {
  border-color: var(--accent-jade-dim);
  color: var(--accent-jade);
  background: rgba(0, 212, 170, 0.06);
}
.model-status.warn {
  border-color: var(--accent-gold-dim);
  color: var(--accent-gold);
  background: rgba(212, 165, 116, 0.06);
}
.model-status.error {
  border-color: var(--danger-dim);
  color: var(--danger);
  background: rgba(231, 76, 60, 0.06);
}

.model-status-icon {
  font-size: 1rem;
  flex-shrink: 0;
}

/* ---- 拍照第二排控件 ---- */
#camera-controls-2 {
  display: flex;
  gap: 10px;
  margin-bottom: 12px;
}

#camera-controls-2 .action-btn {
  flex: 1;
  font-size: 0.85rem;
}

/* ---- 识别结果预览 ---- */
#detection-preview {
  margin-top: 12px;
  animation: fadeInUp 0.4s cubic-bezier(0.16, 1, 0.3, 1) both;
}

#detection-canvas-wrap {
  width: 100%;
  overflow: hidden;
  border-radius: var(--radius-md);
  background: #000;
  margin-bottom: 10px;
}

#detection-canvas {
  display: block;
  width: 100%;
  height: auto;
}

.detection-hint {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-bottom: 10px;
  line-height: 1.4;
}

#detection-list {
  margin-bottom: 12px;
  min-height: 40px;
}

#detection-actions {
  display: flex;
  gap: 10px;
}

#detection-actions .action-btn {
  flex: 1;
}

#btn-detection-cancel { flex: 0.4 !important; }

/* ============================================================
   Spinner
   ============================================================ */
.spinner {
  width: 20px;
  height: 20px;
  border: 2.5px solid rgba(255, 255, 255, 0.15);
  border-top-color: var(--accent-jade);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

/* ============================================================
   Result Section
   ============================================================ */
#result-section {
  animation: fadeInUp 0.4s cubic-bezier(0.16, 1, 0.3, 1) both;
}

#result-content {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

/* Result status messages */
.result-status {
  text-align: center;
  padding: 20px 12px;
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.result-status .status-icon {
  font-size: 2.5rem;
  display: block;
  margin-bottom: 10px;
}

.result-status .status-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 6px;
}

/* ---- Result Card ---- */
.result-card {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-md);
  padding: 14px;
  transition: border-color var(--transition-med), transform var(--transition-med);
  animation: fadeInUp 0.4s cubic-bezier(0.16, 1, 0.3, 1) both;
}

.result-card:hover {
  border-color: rgba(255, 255, 255, 0.12);
}

/* Staggered animation */
.result-card:nth-child(1) { animation-delay: 0s; }
.result-card:nth-child(2) { animation-delay: 0.05s; }
.result-card:nth-child(3) { animation-delay: 0.1s; }
.result-card:nth-child(4) { animation-delay: 0.15s; }
.result-card:nth-child(5) { animation-delay: 0.2s; }
.result-card:nth-child(6) { animation-delay: 0.25s; }
.result-card:nth-child(7) { animation-delay: 0.3s; }
.result-card:nth-child(8) { animation-delay: 0.35s; }
.result-card:nth-child(9) { animation-delay: 0.4s; }
.result-card:nth-child(10) { animation-delay: 0.45s; }
.result-card:nth-child(n+11) { animation-delay: 0.5s; }

/* Best card highlight */
.result-card.best {
  border-color: var(--accent-gold);
  background: var(--accent-gold-dim);
  position: relative;
  animation: fadeInUp 0.4s cubic-bezier(0.16, 1, 0.3, 1) both, pulse 2s ease-in-out 0.6s infinite;
}

.result-card.best::before {
  content: '👑 最佳选择';
  position: absolute;
  top: -10px;
  left: 14px;
  background: linear-gradient(135deg, var(--accent-gold) 0%, #e8c090 100%);
  color: #1a1200;
  font-size: 0.68rem;
  font-weight: 900;
  padding: 2px 10px;
  border-radius: 8px;
  letter-spacing: 0.05em;
  box-shadow: 0 2px 8px rgba(212, 165, 116, 0.3);
}

.result-card .discard-info {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
}

.result-card .discard-label {
  font-size: 0.78rem;
  color: var(--text-secondary);
  font-weight: 500;
}

.result-card .tenpai-info {
  padding-top: 10px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.result-card .tenpai-label {
  font-size: 0.75rem;
  color: var(--text-secondary);
  font-weight: 600;
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.result-card .tenpai-label .count {
  background: var(--accent-jade-dim);
  color: var(--accent-jade);
  font-size: 0.68rem;
  font-weight: 800;
  padding: 1px 7px;
  border-radius: 10px;
}

.result-card .tenpai-tiles {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
}

/* 14-tile tenpai display (already won or ready) */
.tenpai-direct {
  margin-bottom: 12px;
}

.tenpai-direct .tenpai-label {
  font-size: 0.82rem;
  color: var(--accent-jade);
  font-weight: 700;
  margin-bottom: 8px;
}

/* ============================================================
   Tile Entry Animation
   ============================================================ */
.tile-enter {
  animation: tileFlipIn 0.35s cubic-bezier(0.34, 1.56, 0.64, 1) both;
}

/* ============================================================
   Keyframe Animations
   ============================================================ */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes pulse {
  0%, 100% {
    box-shadow:
      0 0 0 0 rgba(212, 165, 116, 0),
      inset 0 0 0 1px var(--accent-gold);
  }
  50% {
    box-shadow:
      0 0 20px 4px rgba(212, 165, 116, 0.15),
      inset 0 0 0 1px var(--accent-gold);
  }
}

@keyframes tileFlipIn {
  0% {
    opacity: 0;
    transform: perspective(400px) rotateY(-90deg) scale(0.8);
  }
  60% {
    transform: perspective(400px) rotateY(10deg) scale(1.02);
  }
  100% {
    opacity: 1;
    transform: perspective(400px) rotateY(0) scale(1);
  }
}

/* ============================================================
   Responsive Design
   ============================================================ */

/* Small phones (320px - 374px) */
@media (max-width: 374px) {
  :root {
    --max-width: 100%;
  }

  #app-header h1 {
    font-size: 1.35rem;
  }

  .glass-panel {
    padding: 14px;
    border-radius: var(--radius-md);
  }

  .mj-tile {
    width: 38px;
    height: 52px;
  }

  .mj-tile .tile-num {
    font-size: 17px;
  }

  .mj-tile .tile-suit {
    font-size: 9px;
  }

  .mj-tile.feng .tile-num,
  .mj-tile.zhong .tile-num,
  .mj-tile.fa .tile-num,
  .mj-tile.bai .tile-num {
    font-size: 19px;
  }

  .mj-tile.sm {
    width: 30px;
    height: 40px;
  }

  .mj-tile.sm .tile-num {
    font-size: 13px;
  }

  .mj-tile.sm .tile-suit {
    font-size: 8px;
  }

  .mj-tile.sm.feng .tile-num,
  .mj-tile.sm.zhong .tile-num,
  .mj-tile.sm.fa .tile-num,
  .mj-tile.sm.bai .tile-num {
    font-size: 15px;
  }

  .mj-tile.lg {
    width: 44px;
    height: 60px;
  }

  .tile-row {
    gap: 3px;
  }
}

/* Medium phones (375px - 427px) */
@media (min-width: 375px) and (max-width: 427px) {
  .mj-tile.sm {
    width: 33px;
    height: 44px;
  }

  .mj-tile.sm .tile-num {
    font-size: 15px;
  }

  .mj-tile.sm .tile-suit {
    font-size: 8px;
  }

  .mj-tile.sm.feng .tile-num,
  .mj-tile.sm.zhong .tile-num,
  .mj-tile.sm.fa .tile-num,
  .mj-tile.sm.bai .tile-num {
    font-size: 16px;
  }
}

/* Tablets & Desktop (480px+) */
@media (min-width: 480px) {
  #app-header {
    padding-top: 40px;
  }

  #app-header h1 {
    font-size: 1.85rem;
  }

  #app-main {
    padding: 0 20px 32px;
  }

  .glass-panel {
    padding: 24px;
    margin-bottom: 20px;
  }

  .mj-tile.sm {
    width: 38px;
    height: 50px;
  }

  .mj-tile.sm .tile-num {
    font-size: 17px;
  }

  .mj-tile.sm .tile-suit {
    font-size: 10px;
  }

  .tile-row {
    gap: 5px;
  }
}

/* ============================================================
   Safe area (iPhone notch)
   ============================================================ */
@supports (padding-top: env(safe-area-inset-top)) {
  #app-header {
    padding-top: calc(28px + env(safe-area-inset-top));
  }

  #app-footer {
    padding-bottom: calc(16px + env(safe-area-inset-bottom));
  }
}

/* ============================================================
   Focus Visible (Accessibility)
   ============================================================ */
:focus-visible {
  outline: 2px solid var(--accent-jade);
  outline-offset: 2px;
}

.mj-tile:focus-visible {
  outline-offset: 3px;
}

/* ============================================================
   Reduced Motion
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}