body {
  font-family: Arial, sans-serif; /* Replace with your site font */
  background: #f5f5f5;
  color: #333;
  padding: 20px;
}

.calculator {
  max-width: 600px;
  margin: auto;
  background: #fff;
  padding: 25px;
  border-radius: 10px;
  box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

h2 {
  text-align: center;
  margin-bottom: 20px;
}

.input-group {
  margin-bottom: 15px;
}

label {
  display: block;
  font-weight: bold;
  margin-bottom: 5px;
}

select {
  width: 100%;
  padding: 8px;
  border-radius: 5px;
  border: 1px solid #ccc;
}

button {
  display: block;
  width: 100%;
  padding: 12px;
  background: #007bff;
  color: #fff;
  border: none;
  font-size: 16px;
  border-radius: 5px;
  cursor: pointer;
}

button:hover {
  background: #0056b3;
}

.results {
  margin-top: 20px;
  background: #f0f0f0;
  padding: 15px;
  border-radius: 8px;
}