body {
  font-family: 'Segoe UI', sans-serif;
  background: #f9f9f9;
  margin: 0;
  padding: 2rem;
  display: flex;
  justify-content: center;
}

.converter-container {
  background: #fff;
  padding: 2rem;
  border-radius: 1rem;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  max-width: 400px;
  width: 100%;
  text-align: center;
}

h1 {
  font-size: 1.8rem;
  margin-bottom: 1rem;
}

.converter {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

input,
select,
button {
  padding: 0.75rem;
  font-size: 1rem;
  border: 1px solid #ccc;
  border-radius: 0.5rem;
}

button {
  background-color: #4a90e2;
  color: white;
  cursor: pointer;
  border: none;
  transition: background 0.3s ease;
}

button:hover {
  background-color: #357ab8;
}

#result {
  font-weight: bold;
  font-size: 1.2rem;
  color: #333;
}