* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
body {
  background: radial-gradient(circle at top, #0f0f1a 0%, #000 100%);
  font-family: 'Segoe UI', sans-serif;
  color: white;
  text-align: center;
  overflow: hidden;
  height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}
.game-container {
  position: relative;
  width: 100%;
  max-width: 500px;
  margin: 0 auto;
  padding: 10px;
}
h1 {
  margin: 10px 0 20px;
  font-weight: 600;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: #0ff;
  text-shadow: 0 0 10px #0ff, 0 0 20px #0ff;
  font-size: 2rem;
}
canvas {
  display: block;
  margin: 0 auto;
  border: 2px solid #ffffff22;
  box-shadow: 0 0 15px #0ff;
  background-color: #000;
  width: 100%;
  height: auto;
  aspect-ratio: 3/4;
  max-height: 80vh;
  touch-action: none;
}
#restartBtn {
  margin-top: 15px;
  padding: 10px 25px;
  background: linear-gradient(to bottom, #0ff, #088);
  color: #000;
  border: none;
  border-radius: 5px;
  font-size: 18px;
  font-weight: bold;
  cursor: pointer;
  display: none;
  box-shadow: 0 0 15px #0ff;
  transition: all 0.2s;
  position: fixed;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  z-index: 100;
}
#restartBtn:hover {
  transform: translate(-50%, -50%) scale(1.05);
  box-shadow: 0 0 20px #0ff;
}
.score-container {
  position: absolute;
  top: 20px;
  left: 20px;
  font-size: 18px;
  color: #fff;
  text-shadow: 0 0 5px #0ff;
  z-index: 10;
  font-family: monospace;
}
.mobile-controls {
  display: none;
  width: 100%;
  max-width: 500px;
  margin-top: 15px;
}
.mobile-controls button {
  width: 70px;
  height: 70px;
  background: rgba(0, 255, 255, 0.2);
  border: 2px solid #0ff;
  border-radius: 50%;
  color: #fff;
  font-size: 24px;
  margin: 0 20px;
  box-shadow: 0 0 10px #0ff;
  touch-action: manipulation;
  user-select: none;
  -webkit-user-select: none;
  -webkit-touch-callout: none;
}
.mobile-controls button:active {
  background: rgba(0, 255, 255, 0.5);
}
.game-info {
  margin-top: 15px;
  font-size: 1.1rem;
  color: #0ff;
  max-width: 500px;
  padding: 10px 20px;
  background-color: rgba(0, 0, 0, 0.5);
  border-radius: 10px;
  border: 1px solid rgba(0, 255, 255, 0.3);
  box-shadow: 0 0 10px rgba(0, 255, 255, 0.2);
  user-select: none;
  -webkit-user-select: none;
}
@media (max-width: 768px) {
  h1 {
    font-size: 1.5rem;
    margin-bottom: 10px;
  }
  .mobile-controls {
    display: flex;
    justify-content: space-between;
    margin-top: 10px;
    margin-bottom: 10px;
  }
  canvas {
    max-height: 50vh;
  }
  .game-info {
    font-size: 0.9rem;
    line-height: 1.4;
    padding: 8px 10px;
    margin-top: 5px;
    width: 95%;
    background-color: rgba(0, 0, 0, 0.7);
  }
  body {
    padding: 5px;
  }
}