* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
  background: linear-gradient(135deg, #f5f7fa, #c3cfe2);
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
}

.game-container {
  background: #fff;
  padding: 30px;
  border-radius: 15px;
  text-align: center;
  box-shadow: 0 8px 25px rgba(0,0,0,0.2);
  width: 350px;
}

h1 {
  margin-bottom: 20px;
  color: #333;
}

.stats {
  display: flex;
  justify-content: space-between;
  margin-bottom: 20px;
  font-weight: bold;
  color: #555;
}

.grid {
  display: grid;
  gap: 10px;
  margin-bottom: 20px;
}

.grid div {
  background: #f0f0f0;
  padding: 15px;
  font-size: 2rem;
  border-radius: 10px;
  cursor: pointer;
  transition: transform 0.2s, background 0.3s;
}

.grid div:hover {
  transform: scale(1.2);
  background: #d0ebff;
}

.controls {
  margin-top: 10px;
}

button {
  padding: 10px 20px;
  border: none;
  background: #007bff;
  color: #fff;
  border-radius: 8px;
  cursor: pointer;
  font-weight: bold;
  transition: background 0.3s;
}

button:hover {
  background: #0056b3;
}

.message {
  margin-top: 15px;
  font-weight: bold;
  color: #d9534f;
}