/* Variable Definitions */
:root {
  --bg-primary: #08090f;
  --bg-secondary: #121526;
  --color-text-main: #f1f3f9;
  --color-text-muted: #8a93a6;
  
  /* Neon Accents */
  --neon-cyan: hsl(190, 100%, 50%);
  --neon-cyan-glow: hsla(190, 100%, 50%, 0.3);
  --neon-pink: hsl(325, 100%, 55%);
  --neon-pink-glow: hsla(325, 100%, 55%, 0.3);
  --neon-green: hsl(145, 80%, 45%);
  --neon-green-glow: hsla(145, 80%, 45%, 0.35);
  --neon-red: hsl(355, 85%, 55%);
  --neon-red-glow: hsla(355, 85%, 55%, 0.35);
  
  /* Glassmorphism */
  --glass-bg: rgba(255, 255, 255, 0.02);
  --glass-bg-hover: rgba(255, 255, 255, 0.04);
  --glass-border: rgba(255, 255, 255, 0.07);
  --glass-border-focus: rgba(255, 255, 255, 0.15);
  --glass-shadow: 0 16px 40px 0 rgba(0, 0, 0, 0.6);
  
  /* Transitions */
  --transition-smooth: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
  --transition-fast: all 0.15s ease-out;
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: radial-gradient(circle at 50% 50%, var(--bg-secondary) 0%, var(--bg-primary) 100%);
  color: var(--color-text-main);
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  overflow-x: hidden;
  line-height: 1.5;
}

/* Typography Helpers */
.font-orbitron {
  font-family: 'Orbitron', monospace;
}

/* Layout Container */
.app-container {
  width: 100%;
  max-width: 900px;
  min-height: 80vh;
  padding: 20px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  position: relative;
}

/* Screen Management */
.screen {
  display: none;
  width: 100%;
  flex-direction: column;
  align-items: center;
  animation: fadeIn 0.4s cubic-bezier(0.25, 0.8, 0.25, 1) forwards;
}

.screen.active {
  display: flex;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(15px) scale(0.98);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

/* Hero Header */
.hero-header {
  text-align: center;
  margin-bottom: 40px;
}

.logo-container {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 15px;
  margin-bottom: 12px;
}

.logo-icon {
  position: relative;
  width: 60px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 50%;
  color: var(--neon-cyan);
  box-shadow: 0 0 20px var(--neon-cyan-glow);
}

.pulse-ring {
  position: absolute;
  top: -2px;
  left: -2px;
  right: -2px;
  bottom: -2px;
  border: 2px solid var(--neon-pink);
  border-radius: 50%;
  animation: ringPulse 2.5s infinite;
  opacity: 0;
}

@keyframes ringPulse {
  0% {
    transform: scale(0.95);
    opacity: 0.8;
  }
  100% {
    transform: scale(1.3);
    opacity: 0;
  }
}

.logo-container h1 {
  font-family: 'Orbitron', sans-serif;
  font-weight: 900;
  font-size: 2.8rem;
  letter-spacing: 4px;
  background: linear-gradient(135deg, #ffffff 40%, var(--color-text-muted) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.logo-container h1 span {
  color: var(--neon-cyan);
  -webkit-text-fill-color: var(--neon-cyan);
  text-shadow: 0 0 15px var(--neon-cyan-glow);
}

.subtitle {
  font-size: 1.1rem;
  color: var(--color-text-muted);
  font-weight: 300;
  letter-spacing: 0.5px;
}

/* Menu Content Grid */
.menu-content {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 30px;
  width: 100%;
}

@media (max-width: 768px) {
  .menu-content {
    grid-template-columns: 1fr;
  }
}

/* Glassmorphism Cards */
.card {
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--glass-border);
  border-radius: 20px;
  padding: 30px;
  box-shadow: var(--glass-shadow);
  transition: var(--transition-smooth);
}

.card:hover {
  border-color: rgba(255, 255, 255, 0.12);
  background: var(--glass-bg-hover);
  box-shadow: 0 20px 50px 0 rgba(0, 0, 0, 0.7);
}

.card h2 {
  font-size: 1.4rem;
  font-weight: 600;
  margin-bottom: 25px;
  color: #fff;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  padding-bottom: 12px;
}

/* Form Styles */
.form-group {
  margin-bottom: 25px;
}

.form-group label {
  display: block;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-text-muted);
  margin-bottom: 10px;
  text-transform: uppercase;
  letter-spacing: 1px;
}

/* Toggle Buttons Selector */
.toggle-buttons {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.toggle-btn {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--glass-border);
  border-radius: 12px;
  padding: 14px 10px;
  color: var(--color-text-muted);
  cursor: pointer;
  transition: var(--transition-smooth);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  text-align: center;
}

.toggle-btn .btn-icon {
  font-size: 1.5rem;
  opacity: 0.8;
}

.toggle-btn .btn-text {
  font-size: 0.95rem;
  font-weight: 600;
  color: #fff;
}

.toggle-btn .btn-text small {
  display: block;
  font-size: 0.75rem;
  font-weight: 400;
  color: var(--color-text-muted);
  margin-top: 2px;
}

.toggle-btn:hover {
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(255, 255, 255, 0.15);
  transform: translateY(-2px);
}

.toggle-btn.active {
  background: rgba(0, 242, 254, 0.06);
  border-color: var(--neon-cyan);
  box-shadow: 0 0 15px rgba(0, 242, 254, 0.2);
}

.toggle-btn.active .btn-icon {
  filter: drop-shadow(0 0 5px var(--neon-cyan));
}

/* Custom Select */
.custom-select {
  width: 100%;
  padding: 12px 16px;
  background: var(--bg-primary);
  border: 1px solid var(--glass-border);
  border-radius: 12px;
  color: #fff;
  font-family: inherit;
  font-size: 0.95rem;
  outline: none;
  cursor: pointer;
  transition: var(--transition-smooth);
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='none' stroke='%238a93a6' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  background-size: 16px;
}

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

/* Switch styling */
.checkbox-wrapper {
  display: flex;
  align-items: center;
  gap: 12px;
  cursor: pointer;
  user-select: none;
}

.switch {
  position: relative;
  display: inline-block;
  width: 44px;
  height: 24px;
}

.switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(255, 255, 255, 0.08);
  border: 1px solid var(--glass-border);
  transition: .3s;
}

.slider:before {
  position: absolute;
  content: "";
  height: 16px;
  width: 16px;
  left: 3px;
  bottom: 3px;
  background-color: #fff;
  transition: .3s;
}

input:checked + .slider {
  background-color: var(--neon-cyan);
  border-color: var(--neon-cyan);
  box-shadow: 0 0 10px var(--neon-cyan-glow);
}

input:checked + .slider:before {
  transform: translateX(20px);
}

.slider.round {
  border-radius: 34px;
}

.slider.round:before {
  border-radius: 50%;
}

.checkbox-label {
  font-size: 0.95rem;
  color: var(--color-text-main);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 28px;
  border-radius: 12px;
  font-family: inherit;
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.5px;
  cursor: pointer;
  outline: none;
  transition: var(--transition-smooth);
  width: 100%;
}

.btn-primary {
  background: linear-gradient(135deg, var(--neon-cyan) 0%, #0072ff 100%);
  color: #000;
  border: none;
  box-shadow: 0 0 20px rgba(0, 242, 254, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(0, 242, 254, 0.5);
}

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

.btn-secondary {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  color: var(--color-text-main);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(255, 255, 255, 0.15);
}

.btn-glowing {
  position: relative;
  overflow: hidden;
}

.btn-glowing::after {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: linear-gradient(45deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  transform: rotate(45deg);
  transition: var(--transition-smooth);
  animation: shine 3s infinite linear;
}

@keyframes shine {
  0% { transform: translate(-50%, -50%) rotate(45deg); }
  100% { transform: translate(50%, 50%) rotate(45deg); }
}

/* Instructions Panel Details */
.controls-guide {
  display: flex;
  justify-content: space-around;
  align-items: center;
  background: rgba(0, 0, 0, 0.2);
  border-radius: 16px;
  padding: 20px;
  margin-bottom: 25px;
  border: 1px solid rgba(255, 255, 255, 0.03);
}

.control-hand {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  text-align: center;
  flex: 1;
}

.control-hand p {
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

.control-hand p strong {
  display: block;
  font-size: 0.95rem;
  margin-top: 4px;
}

.left-hand p strong {
  color: var(--neon-cyan);
  text-shadow: 0 0 8px rgba(0, 242, 254, 0.3);
}

.right-hand p strong {
  color: var(--neon-pink);
  text-shadow: 0 0 8px rgba(255, 0, 127, 0.3);
}

.key-badge {
  background: #252839;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-bottom: 3px solid #141622;
  border-radius: 6px;
  color: #fff;
  font-family: 'Orbitron', monospace;
  font-size: 1rem;
  font-weight: 700;
  padding: 6px 12px;
  display: inline-block;
  min-width: 36px;
  text-align: center;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.divider-line {
  width: 1px;
  height: 60px;
  background: rgba(255, 255, 255, 0.06);
}

.instructions-text {
  color: var(--color-text-muted);
  font-size: 0.95rem;
  display: flex;
  flex-direction: column;
  gap: 15px;
}

.exam-note {
  background: rgba(230, 92, 0, 0.05);
  border: 1px dashed rgba(230, 92, 0, 0.2);
  border-radius: 8px;
  padding: 10px 12px;
  color: #e6c384;
}

/* Gameplay Interface (HUD & Canvas) */
.hud-header {
  display: flex;
  justify-content: space-around;
  width: 100%;
  max-width: 600px;
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--glass-border);
  border-radius: 16px;
  padding: 15px;
  margin-bottom: 20px;
  box-shadow: var(--glass-shadow);
}

.hud-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}

.hud-label {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 1px;
  color: var(--color-text-muted);
}

.hud-value {
  font-family: 'Orbitron', monospace;
  font-size: 1.6rem;
  font-weight: 700;
  color: #fff;
  text-shadow: 0 0 10px rgba(255, 255, 255, 0.1);
}

.timer .hud-value {
  color: var(--neon-cyan);
  text-shadow: 0 0 8px var(--neon-cyan-glow);
}

.mistakes .hud-value {
  color: var(--neon-pink);
  text-shadow: 0 0 8px var(--neon-pink-glow);
}

.game-container {
  position: relative;
  width: 100%;
  max-width: 600px;
  height: 600px;
  background: #06070a;
  border: 2px solid var(--glass-border);
  border-radius: 20px;
  overflow: hidden;
  box-shadow: 0 25px 60px rgba(0,0,0,0.8), 0 0 30px rgba(0,0,0,0.5);
}

/* Canvas Styling */
#gameCanvas {
  display: block;
  width: 100%;
  height: 100%;
}

/* Overlay Countdowns */
.overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(5, 6, 10, 0.85);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 10;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.overlay.active {
  opacity: 1;
}

.countdown-number {
  font-family: 'Orbitron', sans-serif;
  font-size: 6rem;
  font-weight: 900;
  color: var(--neon-cyan);
  text-shadow: 0 0 30px var(--neon-cyan-glow);
  transform: scale(0.6);
  animation: countdownPulse 1s infinite cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

@keyframes countdownPulse {
  0% { transform: scale(0.4); opacity: 0; }
  20% { transform: scale(1); opacity: 1; }
  80% { transform: scale(1.1); opacity: 0.9; }
  100% { transform: scale(1.3); opacity: 0; }
}

.game-footer {
  margin-top: 25px;
  width: 100%;
  max-width: 600px;
}

/* Results Screen */
.results-card {
  width: 100%;
  max-width: 580px;
  animation: resultsSlideUp 0.6s cubic-bezier(0.19, 1, 0.22, 1) forwards;
}

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

.results-header {
  text-align: center;
  margin-bottom: 30px;
  position: relative;
}

.title-glow {
  font-size: 1.8rem;
  font-weight: 700;
  color: #fff;
  letter-spacing: 0.5px;
  margin-bottom: 15px;
}

.result-badge {
  display: inline-block;
  padding: 10px 30px;
  font-family: 'Orbitron', sans-serif;
  font-size: 1.6rem;
  font-weight: 900;
  letter-spacing: 2px;
  border-radius: 30px;
  margin-top: 5px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.result-badge.apto {
  background: rgba(46, 204, 113, 0.1);
  border: 2px solid var(--neon-green);
  color: var(--neon-green);
  text-shadow: 0 0 10px var(--neon-green-glow);
  box-shadow: inset 0 0 10px var(--neon-green-glow), 0 0 20px var(--neon-green-glow);
}

.result-badge.no-apto {
  background: rgba(231, 76, 60, 0.1);
  border: 2px solid var(--neon-red);
  color: var(--neon-red);
  text-shadow: 0 0 10px var(--neon-red-glow);
  box-shadow: inset 0 0 10px var(--neon-red-glow), 0 0 20px var(--neon-red-glow);
}

.stats-summary-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 15px;
  margin-bottom: 30px;
}

.stat-box {
  background: rgba(0, 0, 0, 0.25);
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: 14px;
  padding: 15px 10px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  text-align: center;
}

.stat-box .stat-num {
  font-size: 1.5rem;
  font-weight: 700;
  color: #fff;
}

.stat-box:nth-child(1) .stat-num {
  color: var(--neon-green);
  text-shadow: 0 0 8px var(--neon-green-glow);
}

.stat-box:nth-child(2) .stat-num {
  color: var(--neon-pink);
  text-shadow: 0 0 8px var(--neon-pink-glow);
}

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

.hand-details {
  background: rgba(255, 255, 255, 0.01);
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: 16px;
  padding: 20px;
  margin-bottom: 30px;
}

.hand-details h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 15px;
  color: #fff;
}

.hand-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

.hand-row:last-child {
  border-bottom: none;
}

.hand-info {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.95rem;
}

.hand-indicator {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.hand-indicator.left {
  background: var(--neon-cyan);
  box-shadow: 0 0 8px var(--neon-cyan);
}

.hand-indicator.right {
  background: var(--neon-pink);
  box-shadow: 0 0 8px var(--neon-pink);
}

.hand-stats {
  display: flex;
  gap: 20px;
}

.stat-detail {
  display: flex;
  align-items: center;
  gap: 5px;
  font-size: 0.9rem;
}

.stat-detail .lbl {
  color: var(--color-text-muted);
}

.stat-detail .val {
  color: #fff;
  font-weight: 600;
}

.feedback-msg {
  text-align: center;
  font-size: 1.05rem;
  color: var(--color-text-main);
  padding: 10px 20px;
  background: rgba(255, 255, 255, 0.02);
  border-radius: 10px;
  margin-bottom: 30px;
}

.results-footer {
  display: flex;
  gap: 15px;
}

@media (max-width: 480px) {
  .results-footer {
    flex-direction: column;
  }
}