body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
}

.converter {
  max-width: 400px;
  margin: 50px auto;
  padding: 20px;
  background-color: #f4f4f4;
  border-radius: 5px;
  box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

h2 {
  text-align: center;
  color: #333;
}

.input-group, .output-group {
  display: flex;
  justify-content: space-between;
  margin-bottom: 10px;
}

.input-group input, .output-group input, select {
  flex: 1;
  padding: 5px;
}

button {
  width: 100%;
  padding: 10px;
  background-color: #007bff;
  color: white;
  border: none;
  border-radius: 5px;
  cursor: pointer;
}

button:hover {
  background-color: #0056b3;
}