body {
  font-family: "Poppins", sans-serif;
  background: radial-gradient(circle at top, #0f2027, #203a43, #2c5364);
  color: #fff;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  margin: 0;
}

.game-container {
  text-align: center;
  background: rgba(255, 255, 255, 0.05);
  padding: 20px;
  border-radius: 20px;
  box-shadow: 0 0 40px rgba(0, 255, 255, 0.3);
  width: 420px;
}

header h1 {
  font-size: 2rem;
  margin-bottom: 10px;
  text-shadow: 0 0 10px cyan;
}

.controls button {
  background: #1f4068;
  border: none;
  color: #fff;
  margin: 5px;
  padding: 8px 16px;
  border-radius: 10px;
  cursor: pointer;
  transition: 0.2s;
}

.controls button:hover {
  background: #00adb5;
  box-shadow: 0 0 10px #00fff5;
}

.board {
  display: grid;
  grid-template-columns: repeat(8, 45px);
  grid-template-rows: repeat(8, 45px);
  justify-content: center;
  gap: 5px;
  margin-top: 15px;
}

.gem {
  width: 45px;
  height: 45px;
  border-radius: 10px;
  cursor: pointer;
  box-shadow: 0 0 10px rgba(255, 255, 255, 0.4);
  transition: transform 0.2s, box-shadow 0.2s;
}

.gem:hover {
  transform: scale(1.1);
  box-shadow: 0 0 20px rgba(0, 255, 255, 0.6);
}

.obstacle {
  background: gray !important;
  box-shadow: 0 0 5px #000;
  cursor: not-allowed;
}