*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
:root {
  --bg: #1a1a2e;
  --bg2: #16213e;
  --neon: #39ff14;
  --neon-dim: #39ff1466;
  --neon-glow: 0 0 10px #39ff14, 0 0 20px #39ff1444;
  --text: #e0e0e0;
  --text-dim: #888;
  --danger: #ff4444;
  --gold: #ffd700;
  --font: 'Segoe UI', Tahoma, sans-serif;
}

html { font-size: 16px; height: 100%; }
body {
  font-family: var(--font);
  background: #111;
  color: var(--text);
  direction: rtl;
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  -webkit-user-select: none;
  user-select: none;
}

#game {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 100%;
  max-width: 400px;
}

.game-hud {
  display: flex;
  gap: 1rem;
  align-items: center;
  padding: .4rem .75rem;
  width: 100%;
  max-width: 400px;
  justify-content: space-between;
}
.hud-back {
  color: var(--neon);
  text-decoration: none;
  font-size: 1.2rem;
  border: 1px solid var(--neon-dim);
  padding: .2rem .5rem;
  border-radius: 8px;
}
.hud-score { color: var(--neon); font-weight: 700; font-size: 1rem; }
.hud-best { color: var(--gold); font-size: .85rem; }

#canvas {
  display: block;
  background: #222;
  border: 2px solid var(--neon-dim);
  border-radius: 8px;
  touch-action: none;
}

.game-overlay {
  position: absolute;
  inset: 0;
  top: 36px;
  background: #000c;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: .75rem;
  z-index: 5;
  border-radius: 8px;
}
.game-overlay.hidden { display: none; }
.game-overlay h2 { color: var(--neon); font-size: 1.8rem; text-shadow: var(--neon-glow); }
.game-overlay p { color: var(--text-dim); font-size: .9rem; }
.game-overlay button {
  background: var(--neon);
  color: #111;
  border: none;
  padding: .6rem 1.5rem;
  border-radius: 10px;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
}
.game-overlay button:hover { transform: scale(1.05); }

.mobile-controls {
  display: none;
  gap: 1rem;
  margin-top: .5rem;
}
.mc-btn {
  width: clamp(60px, 18vw, 90px);
  height: clamp(60px, 18vw, 90px);
  background: var(--bg2);
  border: 1px solid var(--neon-dim);
  color: var(--neon);
  font-size: 2rem;
  border-radius: 14px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
}
.mc-btn:active { background: var(--neon); color: #111; }

@media (hover: none) and (pointer: coarse) {
  .mobile-controls { display: flex; }
}