body {
  font-family: Arial, sans-serif;
  background: linear-gradient(to bottom, #000428, #004e92);
  background: radial-gradient(circle, #000428, #004e92);
  margin: 0;
  padding: 0;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  overflow: hidden;
}

#quiz-container {
  background: white;
  padding: 30px;
  border-radius: 10px;
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
  max-width: 750px;
  margin: 0 auto;
  text-align: center;
}

button {
  font-size: 1.5rem;
  padding: 10px 20px;
  min-width: 120px;
  margin-top: 20px;
  cursor: pointer;
  background-color: #007bff;
  color: white;
  border: none;
  border-radius: 5px;
}

button:disabled {
  background-color: #b0b0b0;
}

h1 {
  font-size: 2rem;
  margin-bottom: 20px;
  text-align: center;
  color: white;
}

#question {
  font-size: 1.5rem;
  margin-bottom: 20px;
}

#options > button {
  margin: 0 1rem;
}

#score {
  font-weight: bold;
  font-size: 1.2rem;
}

#hint,
#feedback {
  margin: 1rem 0;
}