#macro-calculator {
  max-width: 400px;
  margin: 20px auto;
  font-family: Arial, sans-serif;
}

#macro-form label {
  display: block;
  margin-top: 10px;
}

#macro-form input, #macro-form select, #macro-form button {
  width: 100%;
  padding: 10px;
  margin-top: 5px;
  border: 1px solid #ccc;
  border-radius: 4px;
}

#results {
  margin-top: 20px;
}