* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Poppins', sans-serif;
}

body {
  height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  background: linear-gradient(135deg, #667eea, #764ba2);
}

.quiz-container {
  background: rgba(255, 255, 255, 0.15);
  backdrop-filter: blur(15px);
  padding: 30px;
  width: 400px;
  border-radius: 15px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.2);
  text-align: center;
  color: white;
}

.quiz-container h2 {
  margin-bottom: 20px;
  font-size: 20px;
}

#answers button {
  width: 100%;
  padding: 10px;
  margin: 8px 0;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  background: rgba(255,255,255,0.2);
  color: white;
  transition: 0.3s;
}

#answers button:hover {
  background: rgba(255,255,255,0.4);
  transform: scale(1.03);
}

.correct {
  background-color: #28a745 !important;
}

.wrong {
  background-color: #dc3545 !important;
}

#nextBtn, #restartBtn {
  margin-top: 15px;
  padding: 10px 15px;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  background: #ffffff;
  color: #333;
  font-weight: bold;
  transition: 0.3s;
}

#nextBtn:hover, #restartBtn:hover {
  background: #f1f1f1;
  transform: scale(1.05);
}

#score {
  margin-top: 15px;
  font-size: 18px;
  font-weight: bold;
}