.amc-calculator {
  max-width: 600px;
  margin: 20px auto;
  background: #e8f5e9;
  padding: 20px;
  border-radius: 12px;
}
.amc-calculator input, .amc-calculator select {
  width: 100%;
  padding: 8px;
  margin-bottom: 10px;
}
.amc-calculator button {
  background: #2e7d32;
  color: #fff;
  padding: 10px;
  border: none;
  border-radius: 6px;
}