/* Fonts are a system stack on purpose. A Google Fonts @import blocks
   window.load on many TVs and left the fullscreen loader in place. */
/* ═══ THEME CONSTANTS ═══ */
:root {
  /* Common tokens */
  --font-body: 'Plus Jakarta Sans', 'Segoe UI', 'Noto Sans CJK SC', 'Droid Sans Fallback', sans-serif;
  --font-display: 'Space Grotesk', 'Segoe UI', 'Noto Sans CJK SC', 'Droid Sans Fallback', sans-serif;
  --font-serif: 'Noto Serif SC', 'Noto Serif CJK SC', 'Songti SC', 'Source Han Serif SC', 'Droid Sans Fallback', serif;
  
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --radius-xl: 24px;
  
  --transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ─── LIGHT THEME ─── */
:root, html[data-theme="light"] {
  --bg: #f1f5f9;
  --bg-gradient: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
  --surface: rgba(255, 255, 255, 0.7);
  --surface-hover: rgba(255, 255, 255, 0.85);
  --surface-solid: #ffffff;
  --surface2: #e2e8f0;
  --surface3: #cbd5e1;
  --border: rgba(148, 163, 184, 0.18);
  --border-focus: #2563eb;
  
  --text: #0f172a;
  --text-muted: #64748b;
  --text-inverse: #ffffff;
  
  --accent: #2563eb;
  --accent-hover: #1d4ed8;
  --accent-gradient: linear-gradient(135deg, #2563eb, #6366f1);
  --accent-glow: rgba(37, 99, 235, 0.15);
  
  --danger: #ef4444;
  --danger-hover: #dc2626;
  --success: #10b981;
  --success-hover: #059669;
  --warning: #f59e0b;
  
  --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.04);
  --shadow-md: 0 10px 25px -5px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 20px 50px -12px rgba(15, 23, 42, 0.12);
  --shadow-glow: 0 0 20px rgba(37, 99, 235, 0.1);
  
  --glass-bg: rgba(255, 255, 255, 0.65);
  --glass-border: rgba(255, 255, 255, 0.4);
}

/* ─── DARK THEME ─── */
html[data-theme="dark"] {
  --bg: #090d16;
  --bg-gradient: linear-gradient(135deg, #090d16 0%, #0c1220 100%);
  --surface: rgba(15, 23, 42, 0.55);
  --surface-hover: rgba(15, 23, 42, 0.7);
  --surface-solid: #0d131f;
  --surface2: #1e293b;
  --surface3: #334155;
  --border: rgba(240, 246, 252, 0.08);
  --border-focus: #58a6ff;
  
  --text: #e6edf3;
  --text-muted: #8b949e;
  --text-inverse: #090d16;
  
  --accent: #58a6ff;
  --accent-hover: #1f6feb;
  --accent-gradient: linear-gradient(135deg, #58a6ff, #8b5cf6);
  --accent-glow: rgba(88, 166, 255, 0.2);
  
  --danger: #f85149;
  --danger-hover: #dc3c3c;
  --success: #3fb950;
  --success-hover: #2ea043;
  --warning: #f59e0b;
  
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 10px 30px -5px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 20px 60px -12px rgba(0, 0, 0, 0.6);
  --shadow-glow: 0 0 25px rgba(88, 166, 255, 0.15);
  
  --glass-bg: rgba(13, 19, 30, 0.65);
  --glass-border: rgba(255, 255, 255, 0.04);
}

/* ═══ GLOBAL BASE STYLES ═══ */
body {
  background: var(--bg-gradient) !important;
  background-color: var(--bg) !important;
  color: var(--text) !important;
  font-family: var(--font-body) !important;
  transition: background-color var(--transition-normal), color var(--transition-normal);
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}
::-webkit-scrollbar-track {
  background: transparent;
}
::-webkit-scrollbar-thumb {
  background: var(--surface3);
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--text-muted);
}

/* ═══ GENERAL UI RE-STYLING ═══ */

/* Glass Cards */
.card, .panel, .panel-box, .profile-card, .auth-card, .modal {
  background: var(--glass-bg) !important;
  backdrop-filter: blur(14px) !important;
  -webkit-backdrop-filter: blur(14px) !important;
  border: 1px solid var(--glass-border) !important;
  box-shadow: var(--shadow-lg) !important;
  color: var(--text) !important;
  transition: all var(--transition-normal);
}

/* Form Elements */
input, textarea, select {
  background: var(--surface) !important;
  border: 1.5px solid var(--border) !important;
  color: var(--text) !important;
  border-radius: var(--radius-md) !important;
  font-family: var(--font-body) !important;
  outline: none !important;
  transition: all var(--transition-fast) !important;
}
input:focus, textarea:focus, select:focus {
  border-color: var(--accent) !important;
  box-shadow: 0 0 0 3px var(--accent-glow) !important;
  background: var(--surface-solid) !important;
}
input::-webkit-input-placeholder, textarea::-webkit-input-placeholder {
  color: var(--text-muted) !important;
  opacity: 0.7;
}
input::placeholder, textarea::placeholder {
  color: var(--text-muted) !important;
  opacity: 0.7;
}

/* Universal Button Overrides */
.btn-primary, .btn-login, .auth-submit, .btn-ai {
  background: var(--accent-gradient) !important;
  color: var(--text-inverse) !important;
  border: none !important;
  box-shadow: 0 4px 14px var(--accent-glow) !important;
  transition: all var(--transition-fast) !important;
  cursor: pointer;
}
.btn-primary:hover, .btn-login:hover, .auth-submit:hover, .btn-ai:hover {
  opacity: 0.92;
  -webkit-transform: translateY(-1px);
          transform: translateY(-1px);
  box-shadow: 0 6px 20px var(--accent-glow) !important;
}
.btn-primary:active, .btn-login:active, .auth-submit:active, .btn-ai:active {
  -webkit-transform: translateY(1px);
          transform: translateY(1px);
}

.btn-secondary, .btn-ghost, .reset-btn, .back-home, .back-link {
  background: var(--surface) !important;
  border: 1px solid var(--border) !important;
  color: var(--text) !important;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  transition: all var(--transition-fast) !important;
  cursor: pointer;
}
.btn-secondary:hover, .btn-ghost:hover, .reset-btn:hover, .back-home:hover, .back-link:hover {
  background: var(--surface-hover) !important;
  border-color: var(--accent) !important;
  color: var(--accent) !important;
  -webkit-transform: translateY(-1px);
          transform: translateY(-1px);
}

/* ═══ THEME & VOLUME TOGGLE BUTTON STYLES ═══ */
.theme-toggle-btn, .volume-toggle-btn {
  display: -webkit-inline-flex !important;
  display: inline-flex !important;
  -webkit-align-items: center !important;
          align-items: center !important;
  -webkit-justify-content: center !important;
          justify-content: center !important;
  width: 38px !important;
  height: 38px !important;
  min-width: 38px !important;
  min-height: 38px !important;
  padding: 0 !important;
  gap: 0 !important;
  border-radius: 50% !important;
  background: rgba(15, 23, 42, 0.55) !important;
  border: 1px solid rgba(255, 255, 255, 0.22) !important;
  color: #e6edf3 !important;
  cursor: pointer;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.28) !important;
  transition: background var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast), -webkit-transform var(--transition-fast);
  transition: background var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast), transform var(--transition-fast);
  transition: background var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast), transform var(--transition-fast), -webkit-transform var(--transition-fast);
  z-index: 1000;
  overflow: visible !important;
  font-size: 0 !important;
  line-height: 0 !important;
}
html[data-theme="light"] .theme-toggle-btn,
html[data-theme="light"] .volume-toggle-btn {
  background: rgba(255, 255, 255, 0.82) !important;
  border: 1px solid rgba(15, 23, 42, 0.12) !important;
  color: #0f172a !important;
  box-shadow: 0 4px 14px rgba(15, 23, 42, 0.1) !important;
}
.theme-toggle-btn::before,
.volume-toggle-btn::before,
.theme-toggle-btn::after,
.volume-toggle-btn::after {
  content: none !important;
  display: none !important;
}
.theme-toggle-btn:hover, .volume-toggle-btn:hover {
  background: rgba(30, 41, 59, 0.85) !important;
  -webkit-transform: scale(1.08);
          transform: scale(1.08);
  border-color: var(--accent) !important;
  color: var(--accent) !important;
  box-shadow: 0 4px 12px var(--accent-glow) !important;
}
html[data-theme="light"] .theme-toggle-btn:hover,
html[data-theme="light"] .volume-toggle-btn:hover {
  background: #fff !important;
}
.theme-toggle-btn:hover {
  -webkit-transform: scale(1.08) rotate(15deg);
          transform: scale(1.08) rotate(15deg);
}
.theme-toggle-btn svg, .volume-toggle-btn svg {
  width: 20px !important;
  height: 20px !important;
  fill: none !important;
  stroke: currentColor !important;
  stroke-width: 2.2;
  stroke-linecap: round;
  stroke-linejoin: round;
  -webkit-flex-shrink: 0;
          flex-shrink: 0;
}

/* Fixed placement toggle button for pages without navbar */
.theme-toggle-fixed {
  position: fixed !important;
  top: 14px;
  right: 14px;
}
.volume-toggle-fixed {
  position: fixed !important;
  top: 14px;
  right: 60px;
}
/* Ensure clean flex alignments in navbar */
.nav-right, .header-right {
  display: -webkit-flex !important;
  display: flex !important;
  -webkit-align-items: center !important;
          align-items: center !important;
  gap: 12px !important;
}

/* ═══ MICRO-ANIMATIONS & PREMIUM EFFECTS ═══ */
@-webkit-keyframes glowPulse {
  0%, 100% { box-shadow: 0 4px 12px var(--accent-glow); }
  50% { box-shadow: 0 4px 24px var(--accent-glow), 0 0 10px var(--accent); }
}
@keyframes glowPulse {
  0%, 100% { box-shadow: 0 4px 12px var(--accent-glow); }
  50% { box-shadow: 0 4px 24px var(--accent-glow), 0 0 10px var(--accent); }
}

.glow-active {
  -webkit-animation: glowPulse 2s infinite ease-in-out;
          animation: glowPulse 2s infinite ease-in-out;
}

/* Card hover glow enhancements */
.card:hover {
  border-color: var(--accent) !important;
  box-shadow: var(--shadow-lg), var(--shadow-glow) !important;
}

/* ═══ FULLSCREEN LOADING SCREEN TRANSITIONS ═══ */
#wg-loading-screen {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  background: var(--bg-gradient);
  background-color: var(--bg);
  display: -webkit-flex;
  display: flex;
  -webkit-align-items: center;
          align-items: center;
  -webkit-justify-content: center;
          justify-content: center;
  z-index: 9999;
  opacity: 1;
  transition: opacity 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  pointer-events: all;
}
.wg-spinner {
  width: 44px;
  height: 44px;
  border: 4px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  -webkit-animation: wg-spin 0.8s linear infinite;
          animation: wg-spin 0.8s linear infinite;
  box-shadow: var(--shadow-glow);
}
@-webkit-keyframes wg-spin {
  to { -webkit-transform: rotate(360deg); transform: rotate(360deg); }
}
@keyframes wg-spin {
  to { -webkit-transform: rotate(360deg); transform: rotate(360deg); }
}

/* ═══ ACHIEVEMENT TOAST POPUPS ═══ */
.wg-toast-container {
  position: fixed;
  bottom: 24px;
  left: 50%;
  -webkit-transform: translateX(-50%) translateY(100px);
          transform: translateX(-50%) translateY(100px);
  background: var(--glass-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--accent);
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2), var(--shadow-glow);
  padding: 14px 22px;
  border-radius: var(--radius-lg);
  color: var(--text);
  font-family: var(--font-display), sans-serif;
  font-size: 0.9rem;
  font-weight: 700;
  display: -webkit-flex;
  display: flex;
  -webkit-align-items: center;
          align-items: center;
  gap: 10px;
  z-index: 10000;
  pointer-events: none;
  transition: opacity 0.5s ease, -webkit-transform 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
  transition: transform 0.5s cubic-bezier(0.34, 1.56, 0.64, 1), opacity 0.5s ease;
  transition: transform 0.5s cubic-bezier(0.34, 1.56, 0.64, 1), opacity 0.5s ease, -webkit-transform 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
  opacity: 0;
}
.wg-toast-container.show {
  -webkit-transform: translateX(-50%) translateY(0);
          transform: translateX(-50%) translateY(0);
  opacity: 1;
}
.wg-toast-icon {
  font-size: 1.5rem;
  -webkit-animation: wg-bounce 1s infinite alternate;
          animation: wg-bounce 1s infinite alternate;
}
@-webkit-keyframes wg-bounce {
  to { -webkit-transform: translateY(-4px); transform: translateY(-4px); }
}
@keyframes wg-bounce {
  to { -webkit-transform: translateY(-4px); transform: translateY(-4px); }
}

/* ═══ TV BROWSERS ═══
   Magic remotes only deliver click when cursor is pointer.
   Hover transforms also slide the target out from under the cursor. */
html.tv button,
html.tv a,
html.tv label,
html.tv select,
html.tv summary,
html.tv canvas,
html.tv [role="button"],
html.tv [onclick],
html.tv .card,
html.tv .intersection,
html.tv .piece,
html.tv .tile,
html.tv .cell,
html.tv .gem,
html.tv .btn,
html.tv .btn-ai,
html.tv .btn-online,
html.tv .touch-btn {
  cursor: pointer !important;
}

html.tv :focus {
  outline: 3px solid #f59e0b;
  outline-offset: 2px;
}

html.tv .card:hover,
html.tv button:hover,
html.tv a:hover,
html.tv .btn-primary:hover,
html.tv .btn-login:hover,
html.tv .auth-submit:hover,
html.tv .btn-ai:hover,
html.tv .btn-secondary:hover,
html.tv .btn-ghost:hover,
html.tv .reset-btn:hover,
html.tv .back-home:hover,
html.tv .back-link:hover,
html.tv .theme-toggle-btn:hover,
html.tv .volume-toggle-btn:hover {
  -webkit-transform: none !important;
          transform: none !important;
}

html.tv .back-home,
html.tv .back-link,
html.tv .back-btn {
  top: 48px !important;
  left: 48px !important;
}
html.tv .theme-toggle-fixed {
  top: 48px !important;
  right: 48px !important;
}
html.tv .volume-toggle-fixed {
  top: 48px !important;
  right: 96px !important;
}

html.tv .mobile-controls,
html.tv .touch-controls {
  display: grid !important;
}
html.tv .touch-controls {
  grid-template-columns: 1fr 1fr 1fr;
}

/* Light UI uses dark ink. Dark UI uses light ink.
   Many pages hardcode white, which disappears on a light background. */
html[data-theme] :is(
  h1, h2, h3, h4, p, label, li,
  .info-value, .info-item, .panel-box,
  .reset-btn, .game-timer, .card-name, .nav-logo, .stat-val, .title,
  .danger-toggle, .toggle-text, .status-chip, .score-labels, .player-name,
  .modal h3, .modal p
) {
  color: var(--text) !important;
}
html[data-theme] .panel-box :is(button, span, label, p, a, div):not(.turn-indicator):not(.red-score):not(.black-score):not(#redWinsInline):not(#blackWinsInline) {
  color: var(--text) !important;
}
html[data-theme="dark"] #blackWinsInline,
html[data-theme="dark"] .black-score {
  color: var(--text) !important;
}
html[data-theme] :is(
  .subtitle, .panel-title, .info-label, .card-sub, .section-label,
  .hint, .stat-label, .score-divider, .back-home, .back-link, .back-btn
) {
  color: var(--text-muted) !important;
}
html[data-theme] :is(
  .panel-box, .info-label, .info-item, .back-home, .back-link, .back-btn, .reset-btn, .nav-logo
) svg {
  color: var(--text) !important;
  fill: currentColor;
}
html[data-theme] :is(.btn-primary, .btn-login, .auth-submit, .btn-ai),
html[data-theme] :is(.btn-primary, .btn-login, .auth-submit, .btn-ai) svg {
  color: var(--text-inverse) !important;
  fill: currentColor;
}
html[data-theme="light"] .theme-toggle-btn,
html[data-theme="light"] .volume-toggle-btn {
  color: #0f172a !important;
}
html[data-theme="dark"] .theme-toggle-btn,
html[data-theme="dark"] .volume-toggle-btn {
  color: #e6edf3 !important;
}