:root {
  --bg: #0a0a1a;
  --bg2: #0f0f2a;
  --accent: #00ff88;
  --accent2: #00d4ff;
  --danger: #ff4757;
  --gold: #ffd700;
  --purple: #a855f7;
  --pink: #ff6b9d;
  --text: #ffffff;
  --text-dim: #888888;
  --border: #2a2a5a;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
body {
  background: var(--bg);
  font-family: 'Segoe UI', -apple-system, sans-serif;
  color: var(--text);
  overflow: hidden;
  height: 100vh;
  width: 100vw;
  touch-action: none;
}

#app { width: 100%; height: 100%; position: relative; }

/* Screens */
.screen { position: absolute; inset: 0; display: none; }
.screen.active { display: flex; }

/* Menu */
#menu-screen {
  align-items: center; justify-content: center;
  background: radial-gradient(ellipse at center, #0a1a2a 0%, var(--bg) 70%);
}
.menu-container { text-align: center; }
.game-title {
  font-size: 64px; font-weight: 900; letter-spacing: -2px;
  color: var(--accent2); text-shadow: 0 0 40px rgba(0,212,255,0.3);
}
.game-title span { color: var(--accent); }
.subtitle { color: var(--text-dim); margin: 8px 0 32px; font-size: 16px; letter-spacing: 3px; }
.menu-buttons { display: flex; flex-direction: column; gap: 12px; align-items: center; }
.menu-stats { margin-top: 24px; display: flex; gap: 24px; justify-content: center; font-size: 13px; color: var(--text-dim); }

/* Buttons */
.btn-primary, .btn-secondary {
  border: none; border-radius: 10px; padding: 14px 40px;
  font-size: 16px; font-weight: 700; cursor: pointer;
  transition: all 0.2s; min-width: 200px;
}
.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  color: #000;
}
.btn-primary:hover { transform: scale(1.05); box-shadow: 0 0 20px rgba(0,255,136,0.4); }
.btn-secondary {
  background: rgba(255,255,255,0.05); border: 1px solid var(--border);
  color: var(--text);
}
.btn-secondary:hover { background: rgba(255,255,255,0.1); }

/* HUD */
#hud {
  position: absolute; top: 0; left: 0; right: 0; z-index: 10;
  display: flex; align-items: center; justify-content: space-between;
  padding: 10px 20px; background: rgba(10,10,30,0.9);
  border-bottom: 1px solid var(--border);
}
.hud-left { display: flex; align-items: center; gap: 12px; }
.level-badge {
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  padding: 4px 12px; border-radius: 14px; font-weight: 700; font-size: 12px; color: #000;
}
.tier-name { color: var(--accent); font-size: 11px; }
.hud-center { }
.timer {
  font-size: 24px; font-weight: 700; color: var(--danger);
  font-family: 'Courier New', monospace; text-shadow: 0 0 8px rgba(255,71,87,0.4);
}
.hud-right { display: flex; gap: 14px; font-size: 12px; }
.keys { color: var(--gold); }
.moves { color: var(--accent2); }
.score { color: var(--gold); }

/* Canvas */
#game-canvas {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
}

/* Touch controls */
#touch-controls {
  position: absolute; bottom: 20px; left: 50%; transform: translateX(-50%);
  display: grid; grid-template-areas: ". up ." "left . right" ". down .";
  grid-template-columns: 60px 60px 60px; grid-template-rows: 60px 60px 60px;
  gap: 6px; z-index: 20;
}
.touch-btn {
  width: 60px; height: 60px; border-radius: 14px;
  background: rgba(255,255,255,0.08); border: 1px solid rgba(255,255,255,0.15);
  color: #fff; font-size: 22px; cursor: pointer;
  display: flex; align-items: center; justify-content: center;
}
.touch-btn:active { background: rgba(0,255,136,0.2); border-color: var(--accent); }
.touch-btn[data-dir="up"] { grid-area: up; }
.touch-btn[data-dir="left"] { grid-area: left; }
.touch-btn[data-dir="right"] { grid-area: right; }
.touch-btn[data-dir="down"] { grid-area: down; }

/* Overlays */
.overlay { position: absolute; inset: 0; background: rgba(0,0,0,0.8); display: flex; align-items: center; justify-content: center; z-index: 30; }
.overlay.hidden { display: none; }
.overlay-box {
  background: var(--bg2); border: 1px solid var(--border); border-radius: 16px;
  padding: 32px 40px; text-align: center; min-width: 280px;
}
.overlay-box h2 { font-size: 28px; margin-bottom: 16px; }
.overlay-box.gameover h2 { color: var(--danger); }

/* Complete screen */
#complete-screen { align-items: center; justify-content: center; background: rgba(0,0,0,0.85); }
#complete-title { color: var(--accent); }
.complete-stats { margin: 20px 0; }
.stat-row { display: flex; justify-content: space-between; padding: 8px 0; border-bottom: 1px solid rgba(255,255,255,0.05); font-size: 14px; }
.stat-row.stars { justify-content: center; font-size: 28px; border: none; padding-top: 12px; }

/* Game Over */
#gameover-screen { align-items: center; justify-content: center; background: rgba(0,0,0,0.85); }
#gameover-reason { color: var(--text-dim); margin-bottom: 20px; }

/* Desktop: hide touch controls */
@media (min-width: 769px) {
  #touch-controls { display: none; }
}
@media (max-width: 768px) {
  .game-title { font-size: 42px; }
  #hud { padding: 8px 12px; }
  .hud-right { gap: 8px; font-size: 11px; }
  .timer { font-size: 20px; }
}

/* Hint button */
.hint-btn {
  position: absolute; top: 60px; right: 16px; z-index: 15;
  background: rgba(255,215,0,0.15); border: 1px solid rgba(255,215,0,0.4);
  color: #ffd700; padding: 8px 16px; border-radius: 8px;
  font-size: 13px; font-weight: 600; cursor: pointer;
  transition: all 0.2s;
}
.hint-btn:hover { background: rgba(255,215,0,0.25); transform: scale(1.05); }
.hint-btn:active { transform: scale(0.95); }

/* Narration overlay */
.narration-box {
  background: linear-gradient(135deg, rgba(10,10,40,0.95), rgba(20,10,50,0.95));
  border: 1px solid rgba(168,85,247,0.4); border-radius: 16px;
  padding: 32px 40px; text-align: center; max-width: 420px;
  box-shadow: 0 0 40px rgba(168,85,247,0.2);
  animation: narrationIn 0.5s ease-out;
}
@keyframes narrationIn {
  from { opacity: 0; transform: scale(0.9) translateY(20px); }
  to { opacity: 1; transform: scale(1) translateY(0); }
}
.narration-box h2 {
  color: #a855f7; font-size: 22px; margin-bottom: 12px;
  text-shadow: 0 0 15px rgba(168,85,247,0.5);
}
.narration-box p {
  color: #ccc; font-size: 15px; line-height: 1.6;
  font-style: italic; margin-bottom: 16px;
}
.narration-dismiss {
  color: #555; font-size: 11px; letter-spacing: 1px;
}

/* Leaderboard */
.leaderboard-container {
  width: 100%; max-width: 480px; margin: 0 auto;
  padding: 32px 24px; text-align: center;
}
.leaderboard-container h2 { font-size: 28px; margin-bottom: 16px; color: var(--gold); }
.lb-tabs { display: flex; gap: 8px; justify-content: center; margin-bottom: 16px; }
.lb-tab {
  background: rgba(255,255,255,0.05); border: 1px solid var(--border);
  color: var(--text-dim); padding: 8px 20px; border-radius: 8px;
  cursor: pointer; font-size: 13px;
}
.lb-tab.active { background: rgba(0,212,255,0.15); border-color: var(--accent2); color: var(--accent2); }
.lb-list {
  max-height: 400px; overflow-y: auto; margin-bottom: 16px;
  background: rgba(0,0,0,0.3); border-radius: 10px; padding: 12px;
}
.lb-row {
  display: flex; align-items: center; padding: 8px 12px;
  border-bottom: 1px solid rgba(255,255,255,0.03); font-size: 13px;
}
.lb-row:last-child { border-bottom: none; }
.lb-rank { width: 30px; color: var(--gold); font-weight: 700; }
.lb-rank.top1 { color: #ffd700; }
.lb-rank.top2 { color: #c0c0c0; }
.lb-rank.top3 { color: #cd7f32; }
.lb-name { flex: 1; text-align: left; color: var(--text); }
.lb-score { color: var(--accent); font-weight: 600; margin-left: 8px; }
.lb-level { color: var(--text-dim); font-size: 11px; margin-left: 8px; }
.lb-loading { color: var(--text-dim); padding: 20px; }
.lb-empty { color: var(--text-dim); padding: 20px; }
#leaderboard-screen { align-items: center; justify-content: center; background: var(--bg); }

/* Sound toggle */
.sound-toggle {
  position: fixed; top: 12px; right: 12px; z-index: 50;
  background: rgba(0,0,0,0.5); border: 1px solid var(--border);
  color: #fff; width: 36px; height: 36px; border-radius: 50%;
  font-size: 16px; cursor: pointer; display: flex; align-items: center; justify-content: center;
}
.sound-toggle:hover { background: rgba(255,255,255,0.1); }