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

body {
  font-family: Arial, sans-serif;
  background: #121212;
  color: white;
  overflow: hidden;
}

#game {
  position: relative;
  width: 100%;
  height: 100vh;
}

canvas {
  position: absolute;
  top: 0;
  left: 0;
  background: #333;
  display: block;
}

#time-left, #points {
  position: absolute;
  font-size: 1.5rem;
  font-weight: bold;
}

#time-left {
  top: 20px;
  left: 20px;
}

#points {
  top: 20px;
  right: 20px;
}

#score, #timer {
  background: rgba(0, 0, 0, 0.5);
  padding: 10px;
  border-radius: 5px;
}

#how-to, #over-screen {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: rgba(0, 0, 0, 0.7);
  padding: 30px;
  text-align: center;
  border-radius: 10px;
}

#over-screen {
  display: none;
}

button {
  padding: 10px 20px;
  font-size: 1rem;
  background: #4caf50;
  border: none;
  color: white;
  cursor: pointer;
  border-radius: 5px;
}

button:hover {
  background: #ebe418;
}

@media (max-width: 768px) {
  #score, #timer {
    font-size: 1.2rem;
  }

  #how-to {
    padding: 20px;
    font-size: 1rem;
  }

  #over-screen {
    width: 80%;
    padding: 0px;
  }
}

@media (max-width: 480px) {
  #score, #timer {
    font-size: 1rem;
    padding: 8px;
  }

  #how-to {
    padding: 15px;
    font-size: 0.9rem;
  }

  #over-screen {
    width: 90%;
    padding: 30px;
  }

  canvas {
    width: 100%;
    height: 100%;
  }
}