body {
  font-family: Arial, sans-serif;
  background-color: #f4f4f4;
  margin: 0;
  padding: 0;
  text-align: center;
}

.game-container {
  max-width: 600px;
  margin: 50px auto;
  padding: 20px;
  background: white;
  border-radius: 8px;
  box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

#level-indicator {
  font-size: 18px;
  margin-bottom: 10px;
  font-weight: bold;
}

.image-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
  margin-bottom: 20px;
}

.image-grid img {
  width: 100%;
  border-radius: 4px;
  height: 150px;
  object-fit: cover;
}

input[type="text"] {
  padding: 10px;
  width: 70%;
  margin-bottom: 10px;
  border-radius: 4px;
  border: 1px solid #ccc;
}

button {
  padding: 10px 20px;
  border: none;
  background-color: #28a745;
  color: white;
  font-size: 16px;
  border-radius: 4px;
  cursor: pointer;
}

button:hover {
  background-color: #218838;
}

#resultMessage {
  font-weight: bold;
  margin-top: 15px;
}

.btn-volver {
  display: inline-block;
  margin: 20px;
  padding: 12px 20px;
  background: linear-gradient(90deg, #ff004c, #8000ff);
  color: white;
  text-decoration: none;
  font-size: 1rem;
  border-radius: 8px;
  transition: 0.3s;
  font-weight: bold;
}

.btn-volver:hover {
  background: linear-gradient(90deg, #8000ff, #ff004c);
  transform: scale(1.05);
}