body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background-color: #f2f5f9;
  margin: 0;
  padding: 0;
}

.converter-container {
  max-width: 500px;
  margin: 40px auto;
  background-color: #fff;
  padding: 30px 25px;
  border-radius: 16px;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.08);
}

h1 {
  text-align: center;
  color: #222;
  font-size: 24px;
  margin-bottom: 30px;
}

.converter-box {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.input-group {
  display: flex;
  flex-direction: column;
}

label {
  font-weight: 600;
  margin-bottom: 6px;
  color: #333;
}

input, select {
  padding: 10px 12px;
  border: 1px solid #ccc;
  border-radius: 8px;
  font-size: 16px;
}

button {
  background-color: #0077cc;
  color: white;
  border: none;
  padding: 12px;
  font-size: 16px;
  border-radius: 8px;
  cursor: pointer;
  transition: background 0.3s ease;
}

button:hover {
  background-color: #005fa3;
}

.result {
  font-size: 18px;
  font-weight: bold;
  text-align: center;
  margin-top: 10px;
  color: #0077cc;
}