body {
  font-family: Arial, sans-serif;
  background: #f0f0f0;
  display: grid;
  justify-content: center;
  align-items: center;
  height: 100vh;
}

.quiz-container {
  background: white; 
  padding: 20px;
  border-radius: 10px;
  width: 300px;
  text-align: center;
  box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.answer-btn {
  display: block;
  width: 100%;
  margin: 5px 0;
  padding: 10px;
  border: none;
  background: #ddd;
  border-radius: 5px;
  cursor: pointer;
}

.answer-btn:hover {
  background: #ccc;
}

#next-btn,
#restart-btn {
  margin-top: 10px;
  padding: 8px 15px;
  background: #4CAF50;
  color: white;
  border: none;
  border-radius: 5px;
  cursor: pointer;
}

#next-btn:hover,
#restart-btn:hover {
  background: #45a049;
}