body {
  font-family: 'Segoe UI', sans-serif;
  background-color: #f4f6f8;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
}

form {
  background-color: #ffffff;
  padding: 30px;
  border-radius: 15px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  width: 300px;
}

h2 {
  text-align: center;
  color: #333;
  margin-bottom: 20px;
}

label {
  margin-top: 10px;
  color: #555;
  font-weight: bold;
}

input[type="number"],select,output {
  width: 100%;
  padding: 10px;
  margin-top: 5px;
  border: 1px solid #ccc;
  border-radius: 8px;
  box-sizing: border-box;
  font-size: 16px;
}

output {
  background-color: #f0f0f0;
  font-weight: bold;
  text-align: center;
}