body {
  font-family: Arial, sans-serif;
  background-color: #111;
  color: #fff;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
}

.game-container {
  text-align: center;
  max-width: 600px;
}

h1 {
  font-size: 2em;
  color: #ffea00;
  text-shadow: 0 0 10px #ffea00;
}

.scoreboard {
  display: flex;
  justify-content: space-between;
  margin: 10px 0;
  font-size: 1.2em;
}

.grid-container {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  margin: 20px 0;
}

.grid-cell {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background-color: #222;
  box-shadow: 0 0 5px #444;
  cursor: pointer;
  transition: 0.2s;
}

.grid-cell.active {
  background-color: #00ff99;
  box-shadow: 0 0 20px #00ff99, 0 0 40px #00ff99, 0 0 60px #00ff99;
}

.grid-cell.obstacle {
  background-color: #ff0033;
  box-shadow: 0 0 10px #ff0033;
}

.controls button {
  margin: 5px;
  padding: 10px 15px;
  font-size: 1em;
  cursor: pointer;
  border: none;
  border-radius: 5px;
  background-color: #222;
  color: #fff;
  transition: 0.2s;
}

.controls button:hover {
  background-color: #00ff99;
  color: #000;
}