#root {
  font-family: Arial, sans-serif;
  padding: 20px;
  max-width: 800px;
  margin: 40px auto;
  background-color: #f0f4f8;
  border-radius: 12px;
  box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}
.calculadora-container h2 {
  color: #1a202c;
}