body {
  font-family: Arial, sans-serif;
  background: #f4f4f9;
  text-align: center;
  padding: 20px;
}

.container {
  max-width: 500px;
  margin: auto;
  background: white;
  padding: 20px;
  border-radius: 10px;
  box-shadow: 0 4px 8px rgba(0,0,0,0.2);
}

h1 {
  margin-bottom: 20px;
}

#question {
  font-size: 20px;
  margin-bottom: 15px;
}

ul#options {
  list-style: none;
  padding: 0;
}

ul#options li {
  background: #e0e0e0;
  margin: 8px 0;
  padding: 10px;
  border-radius: 5px;
  cursor: pointer;
  transition: 0.3s;
}

ul#options li:hover {
  background: #c0c0c0;
}

ul#options li.correct {
  background: #8bc34a;
  color: white;
}

ul#options li.wrong {
  background: #f44336;
  color: white;
}

button {
  margin-top: 15px;
  padding: 10px 20px;
  font-size: 16px;
  cursor: pointer;
  border: none;
  border-radius: 5px;
  background: #2196f3;
  color: white;
}

button:hover {
  background: #1976d2;
}

.hidden {
  display: none;
}

#result {
  font-size: 22px;
  margin-top: 20px;
  font-weight: bold;
}