:root {
  --bg-dark: #0a0e1a;
  --bg-panel: rgba(15, 23, 42, 0.85);
  --primary: #00f0ff;
  --primary-dim: rgba(0, 240, 255, 0.2);
  --secondary: #ff2a6d;
  --accent: #7b2dff;
  --success: #05ffa1;
  --warning: #ffcc00;
  --gold: #ffcc00;
  --gold-dim: rgba(255, 204, 0, 0.2);
  --text: #e2e8f0;
  --text-dim: #94a3b8;
  --border: rgba(255, 255, 255, 0.1);
  --font-display: 'Orbitron', sans-serif;
  --font-body: 'Rajdhani', sans-serif;
}

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

html, body {
  width: 100%; height: 100%;
  background: var(--bg-dark);
  color: var(--text);
  font-family: var(--font-body);
  overflow: hidden;
  user-select: none;
  -webkit-user-select: none;
}

#game-container {
  position: relative;
  width: 100%; height: 100%;
  overflow: hidden;
}

#bg-canvas {
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  z-index: 0;
}

/* Screens */
.screen {
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  z-index: 10;
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 20px;
  overflow-y: auto;
  opacity: 0;
  transform: scale(0.95);
  transition: opacity 0.4s ease, transform 0.4s ease;
}

.screen.active {
  display: flex;
  opacity: 1;
  transform: scale(1);
}

/* Main Menu */
.menu-content {
  text-align: center;
  max-width: 500px;
  width: 100%;
  animation: fadeInUp 0.6s ease-out;
}

.logo-container {
  margin-bottom: 30px;
}

.logo-icon {
  font-size: 64px;
  color: var(--primary);
  text-shadow: 0 0 30px var(--primary-dim), 0 0 60px var(--primary-dim);
  animation: pulse 2s ease-in-out infinite;
  margin-bottom: 10px;
}

.game-title {
  font-family: var(--font-display);
  font-size: 52px;
  font-weight: 900;
  letter-spacing: 8px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 8px;
}

.game-subtitle {
  font-size: 16px;
  color: var(--text-dim);
  letter-spacing: 4px;
  text-transform: uppercase;
}

.stats-preview {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-bottom: 30px;
  flex-wrap: wrap;
}

.stat-pill {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: 50px;
  padding: 8px 20px;
  backdrop-filter: blur(10px);
  display: flex;
  flex-direction: column;
  align-items: center;
  min-width: 90px;
}

.stat-label {
  font-size: 11px;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.stat-value {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 700;
  color: var(--primary);
}

.menu-buttons {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 20px;
}

.btn {
  position: relative;
  padding: 16px 32px;
  border: none;
  border-radius: 12px;
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 2px;
  cursor: pointer;
  transition: all 0.3s ease;
  overflow: hidden;
  text-transform: uppercase;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: var(--bg-dark);
  box-shadow: 0 4px 20px rgba(0, 240, 255, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 30px rgba(0, 240, 255, 0.5);
}

.btn-secondary {
  background: var(--bg-panel);
  color: var(--text);
  border: 1px solid var(--border);
  backdrop-filter: blur(10px);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--primary-dim);
}

.btn-gold {
  background: linear-gradient(135deg, var(--gold), #ff9500);
  color: #0a0e1a;
  box-shadow: 0 4px 20px rgba(255, 204, 0, 0.3);
}

.btn-gold:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 30px rgba(255, 204, 0, 0.5);
}

.btn-completed {
  background: linear-gradient(135deg, #666, #999);
  box-shadow: none;
  opacity: 0.7;
}

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

.version {
  font-size: 11px;
  color: var(--text-dim);
  letter-spacing: 2px;
}

/* Screen Header */
.screen-header {
  position: absolute;
  top: 0; left: 0;
  width: 100%;
  display: flex;
  align-items: center;
  padding: 20px;
  z-index: 20;
  background: linear-gradient(to bottom, rgba(10,14,26,0.9), transparent);
}

.screen-header h2 {
  font-family: var(--font-display);
  font-size: 18px;
  letter-spacing: 4px;
  margin-left: 15px;
}

.btn-back {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  color: var(--text);
  width: 40px; height: 40px;
  border-radius: 50%;
  font-size: 20px;
  cursor: pointer;
  backdrop-filter: blur(10px);
  transition: all 0.3s ease;
}

.btn-back:hover {
  border-color: var(--primary);
  color: var(--primary);
}

/* Mode Selection */
.modes-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px;
  max-width: 900px;
  width: 100%;
  padding: 80px 20px 20px;
  overflow-y: auto;
  max-height: calc(100vh - 20px);
}

.mode-card {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 30px;
  cursor: pointer;
  transition: all 0.3s ease;
  backdrop-filter: blur(10px);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.mode-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  transform: scaleX(0);
  transition: transform 0.3s ease;
}

.mode-card:hover::before { transform: scaleX(1); }

.mode-card:hover {
  transform: translateY(-5px);
  border-color: var(--primary-dim);
  box-shadow: 0 10px 40px rgba(0, 240, 255, 0.15);
}

.mode-icon {
  font-size: 48px;
  margin-bottom: 15px;
  color: var(--primary);
}

.mode-card h3 {
  font-family: var(--font-display);
  font-size: 20px;
  margin-bottom: 10px;
}

.mode-card p {
  color: var(--text-dim);
  font-size: 15px;
  line-height: 1.5;
  margin-bottom: 15px;
}

.mode-stats {
  display: flex;
  justify-content: center;
  gap: 20px;
  font-size: 14px;
}

.mode-level b, .mode-best b {
  color: var(--primary);
  font-family: var(--font-display);
}

/* Game Screen */
#game-screen {
  justify-content: flex-start;
  padding: 0;
  overflow: hidden;
}

.game-header {
  position: absolute;
  top: 0; left: 0;
  width: 100%;
  display: flex;
  align-items: center;
  padding: 15px 20px;
  z-index: 20;
  background: linear-gradient(to bottom, rgba(10,14,26,0.95), transparent);
}

.game-info {
  margin-left: 15px;
  flex: 1;
}

.game-name {
  font-family: var(--font-display);
  font-size: 16px;
  letter-spacing: 2px;
  display: block;
}

.game-meta {
  display: flex;
  gap: 15px;
  margin-top: 4px;
  font-size: 14px;
}

.meta-item b {
  color: var(--primary);
  font-family: var(--font-display);
  margin-left: 4px;
  letter-spacing: 1px;
  font-variant-numeric: tabular-nums;
}

#game-lives { color: var(--secondary); }

.game-area {
  flex: 1;
  min-height: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
  padding: 72px 16px 12px;
  overflow: hidden;
}

#game-canvas {
  max-width: 100%;
  max-height: 100%;
  border-radius: 12px;
  display: block;
}

.game-controls {
  padding: 10px 20px 18px;
  display: flex;
  justify-content: center;
  gap: 10px;
  flex-wrap: wrap;
}

.game-controls:empty {
  display: none;
  padding: 0;
}

/* Results */
.results-content {
  text-align: center;
  max-width: 400px;
  animation: fadeInUp 0.5s ease-out;
}

.result-icon {
  font-size: 80px;
  margin-bottom: 10px;
  animation: pulse 1.5s ease-in-out infinite;
}

#result-title {
  font-family: var(--font-display);
  font-size: 28px;
  margin-bottom: 25px;
}

.result-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-bottom: 25px;
}

.result-stat {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 15px;
  backdrop-filter: blur(10px);
}

.result-stat.big {
  grid-column: 1 / -1;
  background: linear-gradient(135deg, rgba(0,240,255,0.1), rgba(123,45,255,0.1));
  border-color: var(--primary-dim);
}

.rs-label {
  font-size: 11px;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 1px;
  display: block;
  margin-bottom: 5px;
}

.rs-value {
  font-family: var(--font-display);
  font-size: 28px;
  font-weight: 700;
  color: var(--primary);
}

.result-stat.big .rs-value { font-size: 42px; }

.result-message {
  font-size: 16px;
  color: var(--text-dim);
  margin-bottom: 25px;
  line-height: 1.5;
}

.result-buttons {
  display: flex;
  gap: 12px;
  justify-content: center;
}

/* Stats Screen */
#stats, #how-to, #share-screen, #mode-select {
  justify-content: flex-start;
}

.stats-container {
  max-width: 540px;
  width: 100%;
  padding: 68px 20px 24px;
}

.brain-map {
  display: flex;
  justify-content: center;
  margin-bottom: 18px;
}

.brain-center {
  position: relative;
  width: 136px; height: 136px;
}

.brain-ring {
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  border: 3px solid var(--primary);
  border-radius: 50%;
  border-top-color: transparent;
  animation: spin 3s linear infinite;
}

.brain-core {
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  text-align: center;
}

.core-level {
  font-family: var(--font-display);
  font-size: 38px;
  font-weight: 900;
  color: var(--primary);
  display: block;
}

.core-label {
  font-size: 10px;
  color: var(--text-dim);
  letter-spacing: 2px;
  text-transform: uppercase;
}

.stats-breakdown {
  margin-bottom: 20px;
}

.stat-bar {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 11px;
}

.sb-label {
  width: 155px;
  font-size: 14px;
  color: var(--text-dim);
  text-align: right;
  flex-shrink: 0;
}

.sb-track {
  flex: 1;
  height: 8px;
  background: rgba(255,255,255,0.05);
  border-radius: 4px;
  overflow: hidden;
}

.sb-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  border-radius: 4px;
  transition: width 1s ease-out;
}

.sb-value {
  min-width: 86px;
  font-family: var(--font-display);
  font-size: 12px;
  color: var(--primary);
  flex-shrink: 0;
  text-align: right;
}

/* How to Play */
.how-to-content {
  max-width: 600px;
  width: 100%;
  padding: 80px 20px 20px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.protocol-card {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 25px;
  backdrop-filter: blur(10px);
}

.protocol-icon {
  font-size: 36px;
  color: var(--primary);
  margin-bottom: 10px;
}

.protocol-card h3 {
  font-family: var(--font-display);
  font-size: 18px;
  margin-bottom: 8px;
}

.protocol-card p {
  color: var(--text-dim);
  font-size: 15px;
  line-height: 1.6;
  margin-bottom: 10px;
}

.protocol-tip {
  background: rgba(5, 255, 161, 0.1);
  border-left: 3px solid var(--success);
  padding: 10px 15px;
  border-radius: 0 8px 8px 0;
  font-size: 14px;
  color: var(--success);
}

/* Animations */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.8; transform: scale(1.05); }
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

/* Rank Badge */
.rank-badge {
  display: flex;
  align-items: center;
  gap: 14px;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 14px 18px;
  margin-bottom: 20px;
  backdrop-filter: blur(10px);
  animation: fadeInUp 0.6s ease-out 0.2s both;
}

.rank-icon {
  font-size: 36px;
  flex-shrink: 0;
}

.rank-info {
  flex: 1;
  text-align: left;
  min-width: 0;
}

.rank-name {
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 700;
  color: var(--primary);
  letter-spacing: 1px;
  display: block;
  margin-bottom: 6px;
}

.rank-progress {
  width: 100%;
  height: 6px;
  background: rgba(255,255,255,0.1);
  border-radius: 3px;
  overflow: hidden;
  margin-bottom: 4px;
}

.rank-progress-bar {
  height: 100%;
  background: linear-gradient(90deg, var(--primary), var(--success));
  border-radius: 3px;
  transition: width 0.6s ease;
}

.rank-xp {
  font-size: 11px;
  color: var(--text-dim);
  letter-spacing: 0.5px;
}

/* Rank Up Modal */
.rank-up-overlay {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0,0,0,0.85);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  animation: fadeIn 0.5s ease;
}

.rank-up-icon {
  font-size: 120px;
  animation: pulse 1s ease-in-out infinite;
  margin-bottom: 20px;
}

.rank-up-title {
  font-family: var(--font-display);
  font-size: 24px;
  color: var(--gold);
  letter-spacing: 3px;
  margin-bottom: 10px;
}

.rank-up-name {
  font-family: var(--font-display);
  font-size: 36px;
  font-weight: 900;
  margin-bottom: 20px;
}

.rank-up-dismiss {
  font-family: var(--font-body);
  font-size: 14px;
  color: var(--text-dim);
  margin-top: 30px;
}

/* Share Screen */
.share-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  padding: 62px 20px 16px;
  width: 100%;
  max-width: 560px;
}

.share-card-container {
  width: auto;
  height: min(44vh, 360px);
  aspect-ratio: 1080 / 1350;
  border-radius: 12px;
  overflow: hidden;
  border: 2px solid var(--border);
  box-shadow: 0 0 40px rgba(0,240,255,0.1);
}

.share-card-container canvas {
  width: 100%;
  height: 100%;
  display: block;
}

.share-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  justify-content: center;
}

.share-text-preview {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 12px 16px;
  font-size: 13px;
  color: var(--text-dim);
  width: 100%;
  text-align: center;
  word-break: break-word;
}

/* Screen transitions */
.screen {
  transition: opacity 0.5s cubic-bezier(0.4, 0, 0.2, 1), transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.screen.active {
  transition-delay: 0.05s;
}

/* Shake effect */
@keyframes shake {
  0%, 100% { transform: translateX(0); }
  20% { transform: translateX(-8px); }
  40% { transform: translateX(8px); }
  60% { transform: translateX(-4px); }
  80% { transform: translateX(4px); }
}

.shake {
  animation: shake 0.4s ease;
}

/* Flash overlay */
.flash-overlay {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  pointer-events: none;
  z-index: 999;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.flash-overlay.green { background: rgba(5, 255, 161, 0.15); }
.flash-overlay.red { background: rgba(255, 42, 109, 0.15); }
.flash-overlay.active { opacity: 1; }

/* Combo text */
@keyframes comboFloat {
  0% { opacity: 1; transform: translateY(0) scale(1); }
  100% { opacity: 0; transform: translateY(-60px) scale(1.3); }
}

.combo-text {
  position: absolute;
  font-family: var(--font-display);
  font-size: 28px;
  font-weight: 900;
  color: var(--success);
  text-shadow: 0 0 20px rgba(5,255,161,0.5);
  pointer-events: none;
  animation: comboFloat 1s ease forwards;
  z-index: 50;
}

/* Zen mode card highlight */
.mode-card.zen-selected {
  border-color: var(--success) !important;
  box-shadow: 0 0 30px rgba(5,255,161,0.3) !important;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

/* Responsive */
@media (max-width: 600px) {
  .game-title { font-size: 36px; letter-spacing: 4px; }
  .logo-icon { font-size: 48px; }
  .modes-grid { grid-template-columns: 1fr; padding-top: 70px; }
  .mode-card { padding: 20px; }
  .game-meta { gap: 10px; font-size: 12px; }
  .result-stats { grid-template-columns: 1fr; }
  .result-stat.big { grid-column: 1; }
  .stat-bar { flex-wrap: wrap; }
  .sb-label { width: 100%; text-align: left; }
  .share-card-container { max-width: 300px; }
  .rank-badge { padding: 10px 14px; }
  .rank-icon { font-size: 28px; }
  .rank-name { font-size: 12px; }
}

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