body {
  font-family: Arial, sans-serif;
  background: #f7f7f7;
  margin: 0;
  padding: 0;
}
.container {
  max-width: 800px;
  margin: 30px auto;
  background: #fff;
  padding: 20px 30px;
  border-radius: 10px;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
}
h1 {
  text-align: center;
  margin-bottom: 30px;
}
.question {
  margin-bottom: 20px;
}
.options {
  margin-left: 20px;
}
button {
  display: block;
  margin: 20px auto;
  padding: 10px 20px;
  font-size: 16px;
  background: #4CAF50;
  color: white;
  border: none;
  border-radius: 5px;
  cursor: pointer;
}
button:hover {
  background: #45a049;
}
#result {
  text-align: center;
  font-size: 20px;
  margin-top: 20px;
  font-weight: bold;
}