/* Memory Training Game Styles */
:root {
  --primary: #6600ff;
  --secondary: #9933ff;
  --accent: #00f5ff;
  --gold: #ffd700;
  --rose: #ff2d78;
  --green: #00ff88;
  --void: #020008;
  --deep: #06001a;
  --text: #e8e0ff;
}

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

body {
  background: var(--void);
  color: var(--text);
  font-family: 'Segoe UI', system-ui, sans-serif;
  min-height: 100vh;
  overflow-x: hidden;
}

#game-container {
  width: 100%;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
}

/* UI Panels */
.panel {
  background: rgba(102,0,255,0.1);
  border: 1px solid rgba(102,0,255,0.3);
  border-radius: 16px;
  padding: 24px;
  margin: 16px;
  backdrop-filter: blur(10px);
  max-width: 800px;
  width: calc(100% - 32px);
}

.panel-title {
  font-size: 1.8rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 8px;
  background: linear-gradient(135deg, var(--accent), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.panel-subtitle {
  text-align: center;
  color: rgba(255,255,255,0.6);
  margin-bottom: 24px;
  font-size: 0.95rem;
}

/* Mode Selection */
.mode-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin-bottom: 24px;
}

@media (min-width: 600px) {
  .mode-grid { grid-template-columns: repeat(4, 1fr); }
}

.mode-btn {
  padding: 16px;
  border: 2px solid rgba(102,0,255,0.3);
  background: rgba(0,0,0,0.3);
  border-radius: 12px;
  color: var(--text);
  cursor: pointer;
  transition: all 0.3s ease;
  text-align: center;
  font-size: 1rem;
}

.mode-btn:hover {
  border-color: var(--accent);
  background: rgba(0,245,255,0.1);
}

.mode-btn.active {
  border-color: var(--accent);
  background: rgba(0,245,255,0.2);
  box-shadow: 0 0 20px rgba(0,245,255,0.3);
}

.mode-icon { font-size: 2rem; display: block; margin-bottom: 8px; }

/* Level Selection */
.level-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin-bottom: 24px;
}

@media (min-width: 600px) {
  .level-grid { grid-template-columns: repeat(4, 1fr); }
}

.level-btn {
  padding: 20px 16px;
  border: 2px solid rgba(255,215,0,0.3);
  background: rgba(0,0,0,0.3);
  border-radius: 12px;
  color: var(--text);
  cursor: pointer;
  transition: all 0.3s ease;
  text-align: center;
}

.level-btn:hover {
  border-color: var(--gold);
  background: rgba(255,215,0,0.1);
}

.level-btn.active {
  border-color: var(--gold);
  background: rgba(255,215,0,0.2);
  box-shadow: 0 0 20px rgba(255,215,0,0.3);
}

.level-number { font-size: 1.5rem; font-weight: 700; color: var(--gold); }
.level-label { font-size: 0.8rem; opacity: 0.7; }

/* Timer Selection */
.timer-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: center;
  margin-bottom: 24px;
}

.timer-btn {
  padding: 10px 20px;
  border: 2px solid rgba(0,255,136,0.3);
  background: rgba(0,0,0,0.3);
  border-radius: 20px;
  color: var(--text);
  cursor: pointer;
  transition: all 0.3s ease;
}

.timer-btn:hover {
  border-color: var(--green);
  background: rgba(0,255,136,0.1);
}

.timer-btn.active {
  border-color: var(--green);
  background: rgba(0,255,136,0.2);
}

/* Action Button */
.action-btn {
  width: 100%;
  padding: 18px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  border: none;
  border-radius: 12px;
  color: white;
  font-size: 1.2rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.action-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 30px rgba(102,0,255,0.4);
}

.action-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

/* Game Area */
.game-area {
  width: 100%;
  max-width: 1000px;
  padding: 16px;
}

/* Memorize Grid */
.memorize-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
  gap: 12px;
  margin-bottom: 24px;
}

.item-card {
  background: rgba(102,0,255,0.2);
  border: 2px solid rgba(102,0,255,0.4);
  border-radius: 12px;
  padding: 16px 8px;
  text-align: center;
  position: relative;
  transition: all 0.3s ease;
}

.item-card:hover {
  transform: scale(1.05);
  border-color: var(--accent);
}

.item-index {
  position: absolute;
  top: -8px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--gold);
  color: var(--void);
  width: 24px;
  height: 24px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 700;
}

.item-content {
  font-size: 1.8rem;
  margin-top: 4px;
}

.item-content.small { font-size: 1rem; }

/* Timer Display */
.timer-display {
  text-align: center;
  font-size: 3rem;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 16px;
  font-family: 'Courier New', monospace;
}

.timer-display.warning { color: var(--gold); }
.timer-display.danger { color: var(--rose); animation: pulse 1s infinite; }

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

/* Progress Bar */
.progress-bar {
  width: 100%;
  height: 8px;
  background: rgba(255,255,255,0.1);
  border-radius: 4px;
  overflow: hidden;
  margin-bottom: 24px;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent), var(--secondary));
  transition: width 1s linear;
}

/* Recall Section */
.recall-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
  gap: 12px;
  margin-bottom: 24px;
}

.recall-input {
  background: rgba(0,0,0,0.5);
  border: 2px solid rgba(102,0,255,0.3);
  border-radius: 12px;
  padding: 12px;
  color: white;
  font-size: 1rem;
  text-align: center;
  width: 100%;
  outline: none;
  transition: all 0.3s ease;
}

.recall-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 10px rgba(0,245,255,0.3);
}

.recall-input.correct {
  border-color: var(--green);
  background: rgba(0,255,136,0.1);
}

.recall-input.incorrect {
  border-color: var(--rose);
  background: rgba(255,45,120,0.1);
}

.input-label {
  text-align: center;
  font-size: 0.8rem;
  color: var(--gold);
  margin-bottom: 4px;
}

/* Results Panel */
.results-panel {
  text-align: center;
  padding: 32px;
}

.score-display {
  font-size: 4rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.score-display.excellent { color: var(--green); }
.score-display.good { color: var(--accent); }
.score-display.ok { color: var(--gold); }
.score-display.poor { color: var(--rose); }

.accuracy-text {
  font-size: 1.5rem;
  margin-bottom: 24px;
  color: rgba(255,255,255,0.8);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-bottom: 32px;
}

.stat-box {
  background: rgba(0,0,0,0.3);
  border-radius: 12px;
  padding: 16px;
}

.stat-value { font-size: 1.8rem; font-weight: 700; color: var(--accent); }

.stat-label { font-size: 0.8rem; opacity: 0.6; }

/* Buttons Row */
.btn-row {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

.btn {
  padding: 12px 24px;
  border: 2px solid rgba(255,255,255,0.2);
  background: rgba(0,0,0,0.3);
  border-radius: 8px;
  color: white;
  cursor: pointer;
  transition: all 0.3s ease;
  font-size: 0.95rem;
}

.btn:hover {
  background: rgba(255,255,255,0.1);
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  border-color: transparent;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(102,0,255,0.3);
}

/* Instructions */
.instructions {
  background: rgba(0,0,0,0.3);
  border-left: 4px solid var(--accent);
  padding: 16px 20px;
  margin-bottom: 24px;
  border-radius: 0 8px 8px 0;
}

.instructions h3 {
  color: var(--accent);
  margin-bottom: 8px;
  font-size: 1rem;
}

.instructions ul {
  list-style: none;
  padding-left: 0;
}

.instructions li {
  padding: 4px 0;
  padding-left: 20px;
  position: relative;
  font-size: 0.9rem;
  opacity: 0.8;
}

.instructions li::before {
  content: "→";
  position: absolute;
  left: 0;
  color: var(--accent);
}

/* Header */
.game-header {
  text-align: center;
  padding: 24px 16px;
}

.game-header h1 {
  font-size: 2rem;
  margin-bottom: 8px;
  background: linear-gradient(135deg, var(--accent), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.game-header p {
  color: rgba(255,255,255,0.6);
  font-size: 0.9rem;
}

/* Phase indicator */
.phase-indicator {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-bottom: 24px;
}

.phase-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: rgba(255,255,255,0.2);
}

.phase-dot.active { background: var(--accent); box-shadow: 0 0 10px var(--accent); }
.phase-dot.completed { background: var(--green); }

/* Footer */
.game-footer {
  text-align: center;
  padding: 24px;
  color: rgba(255,255,255,0.4);
  font-size: 0.8rem;
}

.game-footer a {
  color: var(--accent);
  text-decoration: none;
}

/* Section Title */
.section-title {
  font-size: 1rem;
  color: var(--accent);
  margin-bottom: 12px;
  text-transform: uppercase;
  letter-spacing: 1px;
}

/* Responsive */
@media (max-width: 480px) {
  .panel { padding: 16px; margin: 8px; }
  .panel-title { font-size: 1.4rem; }
  .mode-icon { font-size: 1.5rem; }
  .timer-display { font-size: 2rem; }
  .score-display { font-size: 2.5rem; }
  .memorize-grid { grid-template-columns: repeat(auto-fill, minmax(80px, 1fr)); }
  .recall-grid { grid-template-columns: repeat(2, 1fr); }
}

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

/* Loading */
.loading {
  text-align: center;
  padding: 48px;
}

.spinner {
  width: 48px;
  height: 48px;
  border: 4px solid rgba(102,0,255,0.2);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin: 0 auto 16px;
}

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