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

body {
  font-family: 'Segoe UI', sans-serif;
  background: #0f0f23;
  color: #fff;
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
}

.wrapper {
  text-align: center;
  position: relative;
  padding: 1rem;
  width: 100%;
  max-width: 450px;
}

.top-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
  gap: 0.6rem;
  flex-wrap: wrap;
}

.back-btn {
  color: #888;
  text-decoration: none;
  font-size: 0.9rem;
  transition: color 0.2s;
}

.back-btn:hover { color: #4cff72; }
.back-btn { background: #2a2a5e; padding: 0.3rem 0.7rem; border-radius: 6px; }
.pause-btn { background: #2a2a5e; color: #fff; border: none; padding: 0.3rem 0.7rem; border-radius: 6px; font-size: 1rem; cursor: pointer; margin-left: 0.4rem; transition: background 0.2s; }
.pause-btn:hover { background: #3a3a7e; }
.top-bar h1 { font-size: 1.4rem; }

.score-board {
  display: flex;
  gap: 0.8rem;
  font-size: 0.85rem;
  color: #aaa;
}

.score-board strong { color: #4cff72; }

canvas {
  background: #1a1a2e;
  border: 2px solid #2a2a5e;
  border-radius: 8px;
  display: block;
  margin: 0 auto;
  width: 100%;
  max-width: 400px;
}

#overlay {
  display: none;
  position: absolute;
  inset: 0;
  background: rgba(15, 15, 35, 0.92);
  border-radius: 12px;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.8rem;
  z-index: 20;
}

#overlay.show { display: flex; }
#overlay-text { font-size: 1.4rem; color: #ccc; }

#gameover-info { text-align: center; }
#go-score { font-size: 0.95rem; color: #aaa; }
#go-highscore { font-size: 0.85rem; color: #4cff72; }

#restart-btn, #menu-btn {
  margin-top: 0.5rem;
  padding: 0.6rem 1.8rem;
  font-size: 1rem;
  background: #f0c040;
  color: #0f0f23;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  font-weight: 600;
  transition: background 0.2s;
  min-width: 180px;
  text-align: center;
}

#restart-btn:hover, #menu-btn:hover { background: #ffd866; }

#menu-btn { background: #2a2a5e; color: #fff; }
#menu-btn:hover { background: #3a3a7e; }

.hidden { display: none !important; }

.how-to {
  margin-top: 0.8rem;
  font-size: 0.8rem;
  color: #888;
  line-height: 1.6;
}

.how-to p:first-child { color: #4cff72; margin-bottom: 0.3rem; }

@media (max-width: 599px) { .hamburger-btn { display: none !important; } }