.calculator-container {
  max-width: 600px;
  padding: 24px;
  border-radius: 16px;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.1);
  font-family: Arial, sans-serif;
  background: #ffffff;
  margin: 30px auto;
  color: #000;
}
.calculator-container h2 {
  text-align: center;
  margin-bottom: 20px;
  color: #D36238;
}
.calculator-container label {
  display: block;
  margin: 12px 0 6px;
  font-weight: bold;
}
.calculator-container select,
.calculator-container input {
  width: 100%;
  padding: 10px;
  border-radius: 6px;
  border: 1px solid #ccc;
  color: #000;
}
.calculator-container button {
  width: 100%;
  margin-top: 20px;
  padding: 12px;
  background-color: #D36238;
  color: white;
  border: none;
  border-radius: 6px;
  font-size: 16px;
  cursor: pointer;
}
.calculator-container button:hover {
  background-color: #a84821;
}
.calculator-container #output {
  margin-top: 20px;
  text-align: center;
  font-size: 18px;
  font-weight: bold;
  white-space: pre-line;
}
@media (prefers-color-scheme: dark) {
  .calculator-container {
    background: #1e1e1e;
    color: #fff;
  }
  .calculator-container input,
  .calculator-container select {
    background: #2b2b2b;
    color: #fff;
    border: 1px solid #555;
  }
}