body {
  font-family: Arial, sans-serif;
  background: #f9f9f9;
  padding: 30px;
  margin: 0;
}

.converter-container {
  background: #ffffff;
  max-width: 450px;
  margin: auto;
  padding: 25px;
  border-radius: 12px;
  box-shadow: 0 0 15px rgba(0,0,0,0.05);
}

h1 {
  text-align: center;
  margin-bottom: 25px;
  font-size: 24px;
  color: #333;
}

.input-section, .result-section {
  margin-bottom: 20px;
}

label {
  font-weight: 600;
  display: block;
  margin-bottom: 8px;
  color: #444;
}

input[type="number"], input[readonly] {
  width: 100%;
  padding: 10px;
  border-radius: 8px;
  border: 1px solid #ccc;
  font-size: 16px;
}

.button-section {
  text-align: center;
}

button {
  padding: 10px 18px;
  margin: 8px 5px;
  font-size: 15px;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  background-color: #007bff;
  color: white;
  transition: background 0.3s ease;
}

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

#conversionDirection {
  margin-top: 12px;
  font-weight: 500;
  color: #555;
}