body {
  font-family: Arial, sans-serif;
  background: url('https://images.pexels.com/photos/267582/pexels-photo-267582.jpeg') no-repeat center center fixed;
  background-size: cover;
  padding: 20px;
  text-align: center;
  margin: 0;
}

.quiz-container {
  background: rgba(255, 255, 255, 0.9);
  padding: 30px;
  border-radius: 10px;
  max-width: 500px;
  margin: auto;
  box-shadow: 0 0 10px rgba(0,0,0,0.2);
}

h1 {
  margin-bottom: 20px;
  font-size: 28px;
}

#options button {
  display: block;
  width: 100%;
  margin: 10px 0;
  padding: 12px 20px;
  background: #3498db;
  color: #fff;
  border: none;
  cursor: pointer;
  border-radius: 5px;
  transition: background 0.3s ease;
  font-size: 16px;
}

#options button:hover {
  background: #2980b9;
}

#options button.correct {
  background: #2ecc71 !important;
}

#options button.wrong {
  background: #e74c3c !important;
}

#next-btn {
  margin-top: 20px;
  padding: 12px 25px;
  background: #2ecc71;
  color: #fff;
  border: none;
  cursor: pointer;
  border-radius: 5px;
  font-size: 16px;
}

#result {
  margin-top: 20px;
  font-size: 20px;
  font-weight: bold;
}

@media (max-width: 600px) {
  .quiz-container {
    padding: 20px;
    width: 90%;
  }

  h1 {
    font-size: 22px;
  }

  #options button {
    font-size: 14px;
    padding: 10px 15px;
  }

  #next-btn {
    font-size: 14px;
    padding: 10px 20px;
  }
}