body {
  margin: 0;
  padding: 0;
  font-family: Arial, sans-serif;
  background: url('bg.jpg') no-repeat center center fixed;
  background-size: cover;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  color: white;
}

.container {
  background: rgba(0, 0, 0, 0.5);
  padding: 20px;
  border-radius: 10px;
  text-align: center;
}

.converter {
  margin-top: 20px;
}

.converter input,
.converter select,
.converter button {
  margin: 10px;
  padding: 10px;
  border: none;
  border-radius: 5px;
}

#result {
  margin-top: 20px;
}