/* Root Design System Variables */
:root {
  --font-primary: 'Outfit', 'Noto Sans Thai', sans-serif;
  --bg-dark: #09090e;
  --primary: #8b5cf6; /* Electric Violet */
  --primary-glow: rgba(139, 92, 246, 0.45);
  --secondary: #ec4899; /* Pink Glow */
  --secondary-glow: rgba(236, 72, 153, 0.45);
  --success: #10b981; /* Green */
  --success-glow: rgba(16, 185, 129, 0.45);
  --warning: #f59e0b; /* Yellow */
  --danger: #ef4444; /* Red */
  --danger-glow: rgba(239, 68, 68, 0.45);
  --text-main: #f3f4f6;
  --text-muted: #9ca3af;
  --glass-bg: rgba(15, 15, 25, 0.7);
  --glass-border: rgba(255, 255, 255, 0.08);
  --glass-glow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
  --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Global Reset */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  user-select: none;
}

body, html {
  width: 100%;
  height: 100%;
  background-color: var(--bg-dark);
  font-family: var(--font-primary);
  color: var(--text-main);
  overflow: hidden;
}

/* Application Container */
.app-container {
  position: relative;
  width: 100vw;
  height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  background: radial-gradient(circle at center, #1e1b4b 0%, #09090e 100%);
}

/* Game Canvas */
#game-canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
  object-fit: cover;
}

/* Glassmorphism Panel Template */
.glass-panel {
  background: var(--glass-bg);
  backdrop-filter: blur(16px) saturate(180%);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
  border: 1px solid var(--glass-border);
  border-radius: 20px;
  box-shadow: var(--glass-glow);
}

/* Head-Up Display (HUD) */
.hud-bar {
  position: absolute;
  top: 20px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 12px 24px;
  width: 90%;
  max-width: 1100px;
  transition: var(--transition-smooth);
}

.hud-bar.hidden {
  opacity: 0;
  transform: translate(-50%, -40px);
  pointer-events: none;
}

/* Side Panels for Split-Screen HUD */
.hud-side-panel {
  display: flex;
  align-items: center;
  gap: 20px;
  flex: 1;
}

#hud-p1 {
  justify-content: flex-start;
}

#hud-p2 {
  justify-content: flex-end;
}

/* Unified HUD items */
.hud-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  min-width: 70px;
}

.hud-label {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  margin-bottom: 2px;
}

.hud-value {
  font-size: 1.5rem;
  font-weight: 800;
  color: #fff;
  text-shadow: 0 0 10px rgba(255, 255, 255, 0.2);
}

/* Spelling Target HUD display */
.target-word-container {
  display: flex;
  flex-direction: row;
  justify-content: center;
  align-items: center;
  gap: 15px;
  padding: 0 20px;
}

#hud-p1 .target-word-container {
  border-left: 1px solid rgba(255, 255, 255, 0.1);
}

#hud-p2 .target-word-container {
  border-right: 1px solid rgba(255, 255, 255, 0.1);
  flex-direction: row-reverse;
}

.speak-btn {
  background: rgba(255, 255, 255, 0.1);
  border: none;
  color: #fff;
  border-radius: 50%;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition-smooth);
}

.speak-btn:hover {
  background: var(--primary);
  box-shadow: 0 0 15px var(--primary-glow);
  transform: scale(1.05);
}

.speak-btn:active {
  transform: scale(0.95);
}

.target-word-display {
  font-size: 2rem;
  font-weight: 800;
  letter-spacing: 4px;
  display: flex;
  align-items: center;
}

.word-spelled {
  color: #00c2ff; /* Player 1 neon blue */
  text-shadow: 0 0 15px rgba(0, 194, 255, 0.45);
}

.word-placeholder {
  color: rgba(255, 255, 255, 0.25);
  letter-spacing: 6px;
}

/* Player 2 Spelled styles */
.word-spelled-p2 {
  color: #ff007f; /* Player 2 neon pink */
  text-shadow: 0 0 15px rgba(255, 0, 127, 0.45);
}

.word-placeholder-p2 {
  color: rgba(255, 255, 255, 0.25);
  letter-spacing: 6px;
}

/* Shared Timer in split screen */
.shared-timer {
  flex: 0 0 auto;
  border-left: 1px solid rgba(255, 255, 255, 0.15);
  border-right: 1px solid rgba(255, 255, 255, 0.15);
  padding: 0 25px;
}


/* Screen Overlays */
.screen-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 20;
  display: flex;
  justify-content: center;
  align-items: center;
  background: rgba(9, 9, 14, 0.6);
  backdrop-filter: blur(8px);
  transition: opacity 0.4s ease, transform 0.4s ease;
}

.screen-overlay.hidden {
  opacity: 0;
  pointer-events: none;
  transform: scale(1.03);
}

.modal-content {
  width: 90%;
  max-width: 580px;
  padding: 40px;
  display: flex;
  flex-direction: column;
  gap: 25px;
  animation: modalEnter 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

@keyframes modalEnter {
  from {
    transform: translateY(30px) scale(0.95);
    opacity: 0;
  }
  to {
    transform: translateY(0) scale(1);
    opacity: 1;
  }
}

/* Typography & Glows */
h1 {
  font-size: 2.5rem;
  font-weight: 800;
  margin-bottom: 5px;
  line-height: 1.2;
}

.glow-text {
  background: linear-gradient(135deg, #fff 30%, #a78bfa 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  filter: drop-shadow(0 0 15px rgba(167, 139, 250, 0.4));
}

.glow-text-green {
  background: linear-gradient(135deg, #fff 30%, #34d399 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  filter: drop-shadow(0 0 15px rgba(52, 211, 153, 0.4));
}

.glow-text-red {
  background: linear-gradient(135deg, #fff 30%, #f87171 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  filter: drop-shadow(0 0 15px rgba(248, 113, 113, 0.4));
}

.subtitle {
  font-size: 1.1rem;
  color: var(--text-muted);
}

/* Interactive Cards inside Modals */
.instructions-card {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: 14px;
  padding: 20px;
  text-align: left;
}

.instructions-card h3 {
  font-size: 1.1rem;
  margin-bottom: 12px;
  color: #fff;
}

.instructions-card ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.instructions-card li {
  font-size: 0.95rem;
  color: var(--text-muted);
  display: flex;
  align-items: flex-start;
  gap: 8px;
}

.instructions-card li b {
  color: var(--primary);
}

/* Setup controls for Select */
.setup-controls {
  display: flex;
  flex-direction: column;
  gap: 10px;
  text-align: left;
}

.setup-controls label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 4px;
}

.custom-select {
  width: 100%;
  padding: 12px 16px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 12px;
  color: #fff;
  font-family: var(--font-primary);
  font-size: 0.95rem;
  outline: none;
  cursor: pointer;
  transition: var(--transition-smooth);
}

.custom-select:focus {
  border-color: var(--primary);
  box-shadow: 0 0 10px var(--primary-glow);
}

.custom-select option {
  background-color: var(--bg-dark);
  color: #fff;
}

/* Buttons */
.btn {
  width: 100%;
  padding: 15px 30px;
  border-radius: 14px;
  font-family: var(--font-primary);
  font-size: 1.1rem;
  font-weight: 700;
  cursor: pointer;
  transition: var(--transition-smooth);
  display: flex;
  align-items: center;
  justify-content: center;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  border: none;
  color: white;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(139, 92, 246, 0.5);
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-glow {
  animation: pulseGlow 2s infinite alternate;
}

@keyframes pulseGlow {
  0% {
    box-shadow: 0 0 15px rgba(139, 92, 246, 0.4);
  }
  100% {
    box-shadow: 0 0 25px rgba(236, 72, 153, 0.7);
  }
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: white;
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.2);
}

.btn-group {
  display: flex;
  gap: 15px;
  width: 100%;
}

.btn-group .btn {
  flex: 1;
}

/* Calibration Spinner & UI */
.spinner {
  width: 50px;
  height: 50px;
  border: 4px solid rgba(255, 255, 255, 0.1);
  border-left-color: var(--primary);
  border-radius: 50%;
  margin: 0 auto 15px;
  animation: spin 1s linear infinite;
}

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

.hint-text {
  font-size: 0.95rem;
  color: var(--text-muted);
}

.hand-check-indicator {
  padding: 15px;
  background: rgba(255, 255, 255, 0.04);
  border-radius: 12px;
  font-size: 1.1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
}

.status-badge {
  padding: 4px 12px;
  border-radius: 8px;
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
}

.status-badge.bad {
  background: rgba(239, 68, 68, 0.15);
  color: var(--danger);
  border: 1px solid rgba(239, 68, 68, 0.3);
}

.status-badge.good {
  background: rgba(16, 185, 129, 0.15);
  color: var(--success);
  border: 1px solid rgba(16, 185, 129, 0.3);
  animation: badgeBlink 1s infinite alternate;
}

@keyframes badgeBlink {
  from { box-shadow: 0 0 5px var(--success-glow); }
  to { box-shadow: 0 0 15px var(--success-glow); }
}

/* Success Card details */
.win-icon {
  font-size: 4rem;
  animation: bounceScale 1s cubic-bezier(0.175, 0.885, 0.32, 1.275) infinite alternate;
}

@keyframes bounceScale {
  from { transform: scale(1); }
  to { transform: scale(1.15); }
}

.pulse-border {
  border-color: rgba(16, 185, 129, 0.3);
  box-shadow: 0 0 30px rgba(16, 185, 129, 0.2);
}

.highlight-word {
  color: var(--warning);
  font-size: 1.6rem;
  font-weight: 800;
  text-shadow: 0 0 15px rgba(245, 158, 11, 0.4);
}

.score-breakdown {
  display: flex;
  flex-direction: column;
  gap: 10px;
  background: rgba(255, 255, 255, 0.04);
  padding: 15px;
  border-radius: 12px;
}

.score-row {
  display: flex;
  justify-content: space-between;
  font-size: 0.95rem;
  color: var(--text-muted);
}

.score-row .score-val {
  font-weight: 700;
  color: var(--success);
}

/* Gameover Screen styles */
.gameover-icon {
  font-size: 4rem;
}

.highlight-score {
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--secondary);
  text-shadow: 0 0 20px var(--secondary-glow);
}

.stats-summary {
  display: flex;
  flex-direction: column;
  gap: 8px;
  background: rgba(255, 255, 255, 0.04);
  padding: 15px;
  border-radius: 12px;
}

.stats-summary p {
  color: var(--text-muted);
}

.stats-summary span {
  font-weight: 700;
  color: #fff;
}

/* Settings Toolbar */
.quick-settings {
  position: absolute;
  bottom: 20px;
  right: 20px;
  z-index: 10;
  display: flex;
  align-items: center;
  gap: 15px;
  padding: 10px 18px;
  transition: var(--transition-smooth);
}

.quick-settings.hidden {
  opacity: 0;
  transform: translateY(20px);
  pointer-events: none;
}

.settings-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-primary);
  font-size: 0.85rem;
  font-weight: 600;
  padding: 6px 10px;
  border-radius: 8px;
  transition: var(--transition-smooth);
}

.settings-btn:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.08);
}

.settings-btn.active {
  color: var(--primary);
  background: rgba(139, 92, 246, 0.15);
}

.divider {
  width: 1px;
  height: 20px;
  background: rgba(255, 255, 255, 0.1);
}

/* Toast Notifications */
.toast {
  position: absolute;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%) translateY(0);
  z-index: 99;
  background: rgba(15, 15, 25, 0.95);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 12px;
  padding: 12px 24px;
  color: #fff;
  font-size: 0.95rem;
  font-weight: 600;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
  transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.toast.hidden {
  opacity: 0;
  transform: translateX(-50%) translateY(20px);
  pointer-events: none;
}

/* Responsive adjustments */
@media (max-width: 600px) {
  .hud-bar {
    flex-wrap: wrap;
    gap: 10px;
    padding: 10px;
  }
  
  .target-word-container {
    order: -1;
    flex-basis: 100%;
    border-left: none;
    border-right: none;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    padding-bottom: 10px;
    margin-bottom: 5px;
  }
  
  .modal-content {
    padding: 24px;
  }
  
  h1 {
    font-size: 2rem;
  }
}

/* --- New Game Modes CSS --- */
.game-modes-section {
  margin-top: 15px;
  text-align: center;
  width: 100%;
}

.game-modes-section h3 {
  font-size: 1.1rem;
  color: #fff;
  margin-bottom: 15px;
}

.mode-cards-container {
  display: flex;
  gap: 20px;
  justify-content: center;
  flex-wrap: wrap;
  width: 100%;
}

.mode-card {
  flex: 1;
  min-width: 220px;
  max-width: 260px;
  padding: 25px 20px;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 18px;
  color: #fff;
  cursor: pointer;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  transition: var(--transition-smooth);
}

.mode-card:hover {
  transform: translateY(-5px);
  background: rgba(139, 92, 246, 0.08);
  border-color: var(--primary);
  box-shadow: 0 10px 25px rgba(139, 92, 246, 0.25);
}

.mode-card.highlight-border {
  border-color: rgba(236, 72, 153, 0.4);
}

.mode-card.highlight-border:hover {
  background: rgba(236, 72, 153, 0.08);
  border-color: var(--secondary);
  box-shadow: 0 10px 25px rgba(236, 72, 153, 0.25);
}

.mode-icon {
  font-size: 2.8rem;
}

.mode-card h4 {
  font-size: 1.15rem;
  font-weight: 700;
  color: #fff;
}

.mode-card p {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.45;
}

/* --- QR Code Scanner and Vowel Selector Screen CSS --- */
.qr-scan-card {
  padding: 30px 20px;
  background: rgba(6, 182, 212, 0.03);
  border: 2px dashed rgba(6, 182, 212, 0.3);
  border-radius: 16px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  animation: borderGlowPulse 2.5s infinite alternate;
}

@keyframes borderGlowPulse {
  0% {
    border-color: rgba(139, 92, 246, 0.3);
    box-shadow: 0 0 10px rgba(139, 92, 246, 0.1);
  }
  100% {
    border-color: rgba(6, 182, 212, 0.8);
    box-shadow: 0 0 25px rgba(6, 182, 212, 0.45);
  }
}

.qr-icon-scanner {
  font-size: 3.5rem;
  animation: scanEffect 2s ease-in-out infinite alternate;
}

@keyframes scanEffect {
  0% { transform: scale(1) translateY(0); filter: drop-shadow(0 0 5px rgba(6, 182, 212, 0.3)); }
  100% { transform: scale(1.1) translateY(-5px); filter: drop-shadow(0 0 15px rgba(6, 182, 212, 0.8)); }
}

.qr-scan-card h4 {
  font-size: 1.1rem;
  font-weight: 700;
  color: #fff;
}

.manual-vowel-list {
  text-align: left;
  display: flex;
  flex-direction: column;
  gap: 10px;
  width: 100%;
}

.section-title {
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--text-muted);
  letter-spacing: 0.05em;
}

.vowel-buttons-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  width: 100%;
}

.vowel-select-btn {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: #fff;
  padding: 12px 8px;
  border-radius: 12px;
  font-family: var(--font-primary);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition-smooth);
}

.vowel-select-btn:hover {
  background: var(--primary);
  border-color: var(--primary);
  box-shadow: 0 0 12px var(--primary-glow);
  transform: scale(1.03);
}

.vowel-select-btn:active {
  transform: scale(0.97);
}

/* Screen overlay adjustment for vowels */
#screen-vowels .modal-content {
  max-width: 540px;
}

@media (max-width: 500px) {
  .vowel-buttons-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* --- Wizard Step Transitions --- */
.wizard-step {
  display: none !important;
  width: 100%;
}

.wizard-step.active {
  display: flex !important;
  flex-direction: column;
  align-items: center;
  gap: 20px;
  animation: stepFadeIn 0.4s ease;
}

@keyframes stepFadeIn {
  from { opacity: 0; transform: translateX(15px); }
  to { opacity: 1; transform: translateX(0); }
}

.select-wizard {
  max-width: 650px !important;
}

/* Specific mode select style overrides */
.btn-select-subject .mode-icon {
  font-size: 3.5rem;
}

/* Player elements visibility control */
.p2-only.hidden, .p1-only.hidden {
  display: none !important;
}

/* Multiplication Table select styles */
.table-select-btn {
  font-size: 1.05rem !important;
  padding: 14px 10px !important;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.table-select-btn.active {
  background: var(--primary);
  border-color: var(--primary);
  box-shadow: 0 0 15px var(--primary-glow);
}

@media (max-width: 600px) {
  .vowel-buttons-grid {
    grid-template-columns: repeat(3, 1fr) !important;
  }
}

@media (max-width: 440px) {
  .vowel-buttons-grid {
    grid-template-columns: repeat(2, 1fr) !important;
  }
}

/* --- Ultra-Smooth Eco Mode Overrides --- */
/* Disable CPU-taxing background blur and replace with faster solid background colors */
.eco-mode .glass-panel {
  backdrop-filter: none !important;
  -webkit-backdrop-filter: none !important;
  background: rgba(12, 12, 22, 0.95) !important;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5) !important;
}

.eco-mode .screen-overlay {
  backdrop-filter: none !important;
  -webkit-backdrop-filter: none !important;
  background: rgba(5, 5, 10, 0.92) !important;
}

/* Eco Mode active styling for toolbar toggle button */
#toggle-eco.active {
  color: #10b981 !important;
  background: rgba(16, 185, 129, 0.15) !important;
}