body {
  background-color: #000;
  color: #eee;
  font-family: Arial, sans-serif;
  padding: 20px;
  text-align: center;
}

.container {
  max-width: 450px;
  margin: auto;
  background-color: #111;
  padding: 20px;
  border-radius: 8px;
  box-shadow: 0 0 10px #222;
}

h1 {
  margin-bottom: 20px;
}

label {
  display: block;
  margin-top: 15px;
  text-align: left;
}

input, select {
  width: 100%;
  padding: 8px;
  margin-top: 5px;
  border-radius: 4px;
  border: none;
  font-size: 16px;
  background-color: #222;
  color: #eee;
}

button {
  margin-top: 25px;
  padding: 12px;
  width: 100%;
  background-color: #4caf50;
  border: none;
  border-radius: 6px;
  font-size: 18px;
  color: white;
  cursor: pointer;
  transition: background-color 0.3s ease;
}

button:hover {
  background-color: #45a049;
}

#resultado {
  margin-top: 25px;
  font-size: 18px;
  text-align: left;
  background: #222;
  padding: 15px;
  border-radius: 6px;
  white-space: pre-line;
}