body {
  font-family: Arial, sans-serif;
  background: #f5f5f5;
  margin: 0;
  padding: 0;
  text-align: center;
}

.container {
  max-width: 500px;
  margin: 50px auto;
  padding: 20px;
  background: white;
  box-shadow: 0 0 10px rgba(0,0,0,0.1);
  border-radius: 8px;
}

h1 {
  color: #333;
}

.converter {
  margin: 30px 0;
}

input {
  padding: 10px;
  font-size: 16px;
  width: 80%;
  margin-bottom: 10px;
}

button {
  padding: 10px 20px;
  font-size: 16px;
  cursor: pointer;
}

p {
  font-weight: bold;
  margin-top: 10px;
}