body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background: linear-gradient(135deg, #1e3c72, #2b3b4e);
  color: white;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  margin: 0;
}
.container {
  background: rgba(0,0,0,0.7);
  border-radius: 20px;
  padding: 30px;
  width: 600px;
  text-align: center;
  box-shadow: 0 0 20px rgba(0,0,0,0.5);
}
button {
  background: #ff9800;
  border: none;
  padding: 10px 20px;
  margin: 10px;
  font-size: 16px;
  border-radius: 30px;
  cursor: pointer;
  font-weight: bold;
}
button:hover {
  background: #ffb74d;
}
.opcao {
  background: #3f51b5;
  margin: 10px;
  padding: 10px;
  border-radius: 40px;
  cursor: pointer;
}
.opcao:hover {
  background: #5c6bc0;
}
.correct {
  background: green;
}
.wrong {
  background: red;
}