body {
  margin: 0;
  font-family: 'Segoe UI', sans-serif;
  background-color: #121212;
  color: #f0f0f0;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
}

.quiz-container {
  background-color: #1f1f1f;
  padding: 30px;
  border-radius: 15px;
  max-width: 700px;
  width: 90%;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
}

h1 {
  text-align: center;
  margin-bottom: 20px;
  color: #00bcd4;
}

#question {
  font-size: 1.3rem;
  margin-bottom: 20px;
}

#options button {
  background-color: #2a2a2a;
  color: #f0f0f0;
  border: 1px solid #444;
  padding: 12px;
  width: 100%;
  margin: 10px 0;
  border-radius: 10px;
  cursor: pointer;
  transition: 0.2s ease;
}

#options button:hover {
  background-color: #00bcd4;
  color: #000;
}

#next-btn {
  background-color: #4caf50;
  border: none;
  color: white;
  padding: 12px 20px;
  font-size: 1rem;
  border-radius: 10px;
  cursor: pointer;
  margin-top: 20px;
}

#next-btn:hover {
  background-color: #388e3c;
}

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

#explanation {
  margin-top: 10px;
  font-size: 0.95rem;
  color: #a0a0a0;
}