body {
  font-family: Arial, sans-serif;
  background-color: #111;
  color: #fff;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  margin: 0;
}

.quiz-container {
  background: #222;
  padding: 20px;
  border-radius: 10px;
  text-align: center;
  width: 300px;
  box-shadow: 0px 0px 10px rgba(0,0,0,0.5);
}

#question {
  font-size: 1.2rem;
  margin-bottom: 20px;
}

.answer-btn {
  display: block;
  background: #3498db;
  color: white;
  border: none;
  padding: 10px;
  margin: 8px 0;
  border-radius: 5px;
  cursor: pointer;
  width: 100%;
  transition: 0.3s;
}

.answer-btn:hover {
  background: #2980b9;
}

#nextBtn {
  background: #2ecc71;
  color: white;
  border: none;
  padding: 10px 20px;
  border-radius: 5px;
  margin-top: 10px;
  cursor: pointer;
}

#timer {
  font-size: 1rem;
  margin-bottom: 10px;
  color: yellow;
}